added String values

.idea/gradle.xml

@@ -8,7 +8,6 @@
         <option name="disableWrapperSourceDistributionNotification" value="true" />
         <option name="distributionType" value="DEFAULT_WRAPPED" />
         <option name="externalProjectPath" value="$PROJECT_DIR$" />
-        <option name="gradleJvm" value="11" />
         <option name="modules">
           <set>
             <option value="$PROJECT_DIR$" />

.idea/inspectionProfiles/Project_Default.xml

@@ -0,0 +1,13 @@
+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="ConstantConditions" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="SUGGEST_NULLABLE_ANNOTATIONS" value="false" />
+      <option name="DONT_REPORT_TRUE_ASSERT_STATEMENTS" value="false" />
+    </inspection_tool>
+    <inspection_tool class="SerializableHasSerialVersionUIDField" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="ignoreAnonymousInnerClasses" value="false" />
+      <option name="superClassString" value="java.awt.Component" />
+    </inspection_tool>
+  </profile>
+</component>

app/build.gradle

@@ -10,8 +10,8 @@ android {
         applicationId "de.joel.zoomhelper"
         minSdkVersion 21
         targetSdkVersion 30
-        versionCode 13
-        versionName '0.4.9'
+        versionCode 14
+        versionName '0.5.1 beta'
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -39,7 +39,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.3.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
-    implementation 'androidx.lifecycle:lifecycle-process:2.2.0'
+    implementation 'androidx.lifecycle:lifecycle-process:2.3.1'
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'

app/src/main/java/de/joel/zoomhelper/APKDownloader.java

@@ -0,0 +1,82 @@
+package de.joel.zoomhelper;
+
+import android.app.Activity;
+import android.app.DownloadManager;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.Uri;
+import android.os.Build;
+import android.os.Environment;
+import android.provider.Settings;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.core.content.FileProvider;
+
+import java.io.File;
+import java.util.Timer;
+import java.util.TimerTask;
+
+public class APKDownloader {
+    public void downloadAPK(Context context, String fileName, Uri uri) {
+        Activity act = (Activity)context;
+        File destination = new File(context.getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath(), fileName);
+
+        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.O) {
+            if (!context.getPackageManager().canRequestPackageInstalls()) {
+                Toast.makeText(context, R.string.PleaseAllowUnknownSources, Toast.LENGTH_LONG).show();
+                act.startActivityForResult(new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES, Uri.parse("package:de.joel.zoomhelper")), 101);
+                Timer timer = new Timer(true);
+                timer.scheduleAtFixedRate(new TimerTask() {
+                    @Override
+                    public void run() {
+                        if (context.getPackageManager().canRequestPackageInstalls()) {
+                            act.finishActivity(101);
+                            downloadAPK(context, fileName, uri);
+                            timer.cancel();
+                        }
+                    }
+                }, 0, 1000);
+                return;
+            }
+        }
+
+        //Delete update file if exists
+        final Uri localUri = FileProvider.getUriForFile(context, BuildConfig.APPLICATION_ID + ".provider", destination);
+        if (destination.exists()) {
+            //noinspection ResultOfMethodCallIgnored
+            destination.delete();
+        }
+
+        //Download Script
+        DownloadManager downloadManager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
+        DownloadManager.Request request = new DownloadManager.Request(uri);
+        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+        Log.d("Desturi", localUri.getPath());
+        request.setDestinationInExternalFilesDir(context, Environment.DIRECTORY_DOWNLOADS, fileName);
+        final long downloadID = downloadManager.enqueue(request);
+
+        BroadcastReceiver onDownloadComplete = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                //Fetching the download id received with the broadcast
+                long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
+                //Checking if the received broadcast is for our enqueued download by matching download id
+                if (downloadID == id) {
+                    Intent install = new Intent(Intent.ACTION_VIEW);
+                    install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
+                    install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
+                    install.putExtra(Intent.EXTRA_NOT_UNKNOWN_SOURCE, true);
+                    install.setDataAndType(localUri,
+                            downloadManager.getMimeTypeForDownloadedFile(downloadID));
+                    context.startActivity(install);
+
+                    context.unregisterReceiver(this);
+                }
+            }
+        };
+        context.registerReceiver(onDownloadComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
+    }
+}

app/src/main/java/de/joel/zoomhelper/Attendee.java

@@ -0,0 +1,14 @@
+package de.joel.zoomhelper;
+
+import java.io.Serializable;
+
+public class Attendee implements Serializable {
+    private static final long serialVersionUID = 6196688086302483907L;
+    public String name;
+    public String num;
+
+    public Attendee(String name, String num) {
+        this.name = name;
+        this.num = num;
+    }
+}

app/src/main/java/de/joel/zoomhelper/InstantAutoComplete.java

@@ -0,0 +1,25 @@
+package de.joel.zoomhelper;
+
+import android.content.Context;
+import android.util.AttributeSet;
+
+public class InstantAutoComplete extends androidx.appcompat.widget.AppCompatAutoCompleteTextView {
+
+    public InstantAutoComplete(Context context) {
+        super(context);
+    }
+
+    public InstantAutoComplete(Context arg0, AttributeSet arg1) {
+        super(arg0, arg1);
+    }
+
+    public InstantAutoComplete(Context arg0, AttributeSet arg1, int arg2) {
+        super(arg0, arg1, arg2);
+    }
+
+    @Override
+    public boolean enoughToFilter() {
+        return false;
+    }
+
+}

app/src/main/java/de/joel/zoomhelper/MainActivity.java

@@ -1,22 +1,11 @@
 package de.joel.zoomhelper;
 
 import android.annotation.SuppressLint;
-import android.app.DownloadManager;
-import android.content.BroadcastReceiver;
 import android.content.ClipData;
 import android.content.ClipboardManager;
-import android.content.Context;
 import android.content.Intent;
-import android.content.IntentFilter;
-import android.content.SharedPreferences;
 import android.net.Uri;
-import android.os.Build;
 import android.os.Bundle;
-import android.os.Environment;
-import android.provider.Settings;
-import android.util.AttributeSet;
-import android.util.Base64;
-import android.util.Log;
 import android.view.View;
 import android.widget.AutoCompleteTextView;
 import android.widget.EditText;
@@ -27,7 +16,6 @@ import android.widget.Toast;
 
 import androidx.appcompat.app.AlertDialog;
 import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.content.FileProvider;
 import androidx.core.content.pm.ShortcutInfoCompat;
 import androidx.core.content.pm.ShortcutManagerCompat;
 import androidx.core.graphics.drawable.IconCompat;
@@ -37,71 +25,55 @@ import com.github.javiersantos.appupdater.enums.UpdateFrom;
 import com.google.android.material.snackbar.Snackbar;
 import com.google.android.material.textfield.TextInputLayout;
 
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.EOFException;
-import java.io.File;
-import java.io.IOException;
-import java.io.ObjectInputStream;
-import java.io.ObjectOutputStream;
-import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Objects;
-import java.util.Timer;
-import java.util.TimerTask;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
 import static android.content.ClipDescription.MIMETYPE_TEXT_PLAIN;
 
-
-class InstantAutoComplete extends androidx.appcompat.widget.AppCompatAutoCompleteTextView {
-
-    public InstantAutoComplete(Context context) {
-        super(context);
-    }
-
-    public InstantAutoComplete(Context arg0, AttributeSet arg1) {
-        super(arg0, arg1);
-    }
-
-    public InstantAutoComplete(Context arg0, AttributeSet arg1, int arg2) {
-        super(arg0, arg1, arg2);
-    }
-
-    @Override
-    public boolean enoughToFilter() {
-        return false;
-    }
-
-}
-
-
 public class MainActivity extends AppCompatActivity {
 
-    public boolean testing;
-
+    private final MeetingsController meetingsController = new MeetingsController(this);
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
-
-        Intent myIntent = getIntent(); // gets the previously created intent
-        String action = myIntent.getAction();
-        String type = myIntent.getType();
-
-
-        String meetingName = myIntent.getStringExtra("meetingName");
-        boolean joinImmediately = myIntent.getBooleanExtra("joinImmediately", false);
-        testing = myIntent.getBooleanExtra("testing", false);
-
         super.onCreate(savedInstanceState);
 
+        //get intent parameters
+        Intent myIntent = getIntent();
+        String action = myIntent.getAction();
+        String type = myIntent.getType();
+        String meetingName = myIntent.getStringExtra("meetingName");
+        boolean joinImmediately = myIntent.getBooleanExtra("joinImmediately", false);
+        //boolean testing = myIntent.getBooleanExtra("testing", false);
+
         setContentView(R.layout.activity_main);
+
+        //views
         final ScrollView scrollview = findViewById(R.id.scrollArea);
+        final ImageView saveIcon = findViewById(R.id.imageSave);
+        final ImageView trashIcon = findViewById(R.id.imageTrash);
+        final ImageView AttIcon = findViewById(R.id.imageAttend);
+        final ImageView AddIcon = findViewById(R.id.imageAdd);
+        final EditText meetingID = findViewById(R.id.textBoxID);
+        final ImageView ShareIcon = findViewById(R.id.imageShare);
+        final ImageView ShortcutIcon = findViewById(R.id.imageCreateShortcut);
 
+        //add event listeners to views
+        saveIcon.setOnClickListener(v -> saveMeetingFromUI());
+        trashIcon.setOnClickListener(v -> meetingsController.removeMeeting(meetingsController.searchMeetingInList(meetingsController.getMeetings(), createCurrMeetingFromUI().meetingName)));
+        AttIcon.setOnClickListener(v -> btnJoin_onClick(null));
+        AddIcon.setOnClickListener(v -> {
+            fillBlank();
+            meetingID.requestFocus();
+        });
+        ShareIcon.setOnClickListener(v -> shareMeeting(createCurrMeetingFromUI()));
+        ShortcutIcon.setOnClickListener(v -> showCreateShortcutUI());
 
-        int meetingIndex = searchMeetingInList(getMeetings(), meetingName);
+        //show alert if meeting from shortcut not found
+        int meetingIndex = meetingsController.searchMeetingInList(meetingsController.getMeetings(), meetingName);
         if (meetingIndex == -1) {
             if (meetingName != null) {
                 AlertDialog.Builder dialog = new AlertDialog.Builder(this);
@@ -113,23 +85,23 @@ public class MainActivity extends AppCompatActivity {
             joinImmediately = false;
         }
 
-        if (meetingIndex <= getMeetings().size() && meetingIndex != -1) {
-            setLastMeeting(meetingIndex);
+        //adjust ui for meeting from shortcut
+        if (meetingIndex <= meetingsController.getMeetings().size() && meetingIndex != -1) {
+            meetingsController.setLastMeeting(meetingIndex);
             AutoCompleteTextView textMeetingName = findViewById(R.id.TextMeetingName);
             textMeetingName.setEnabled(false);
             textMeetingName.setAdapter(null);
-            ImageView imageTrash = findViewById(R.id.imageTrash);
-            imageTrash.setVisibility(View.GONE);
+            trashIcon.setVisibility(View.GONE);
             TextInputLayout layoutMeetingName = findViewById(R.id.layoutMeetingName);
             layoutMeetingName.setEndIconMode(TextInputLayout.END_ICON_NONE);
         }
 
-
-        //watchMeetingNameBox();
         fillDropdownMeetingName();
-        if (getLastMeeting() != -1) {
+
+        //fill ui with data from last selected meeting or show error if config version changed or index out of bounds
+        if (meetingsController.getLastMeeting() != -1) {
             try {
-                fillMeeting(getLastMeeting());
+                fillMeeting(meetingsController.getLastMeeting());
                 scrollview.post(() -> scrollview.scrollTo(0, scrollview.getChildAt(0).getHeight()));
             } catch (IndexOutOfBoundsException e) {
                 AlertDialog.Builder dialog = new AlertDialog.Builder(this);
@@ -137,64 +109,45 @@ public class MainActivity extends AppCompatActivity {
                 dialog.setTitle(R.string.hint);
                 AlertDialog alertDialog = dialog.create();
                 alertDialog.show();
-                setLastMeeting(-1);
-                saveMeetingList(new ArrayList<>());
+                meetingsController.setLastMeeting(-1);
+                meetingsController.saveMeetingList(new ArrayList<>());
             }
         }
-        watchSaveIcon();
-        watchAttIcon();
-        watchDeleteIcon();
-        watchNewIcon();
-        watchShareIcon();
-        watchShortcutIcon();
 
+        //handle meeting invitation text sent to ZoomHelper
         if (Intent.ACTION_SEND.equals(action) && type != null) {
             if ("text/plain".equals(type)) {
-                handleSendText(myIntent); // Handle text being sent
+                handleSendText(myIntent);
             }
         }
 
+        //join meeting immediately, otherwise enable app updater
         if (joinImmediately) {
-            Meeting currMeeting = getMeetings().get(meetingIndex);
-            String url = buildZoomURL(currMeeting.meetingID, currMeeting.meetingPWD, currMeeting.attendees.get(currMeeting.lastAtt).name, currMeeting.attendees.get(currMeeting.lastAtt).num);
-            launchZoomUrl(url);
+            Meeting currMeeting = meetingsController.getMeetings().get(meetingIndex);
+            new ZoomLink(this, currMeeting).launch();
         } else {
+            //TODO: updatetest.xml -> update.xml when finished testing
             AppUpdater appUpdater = new AppUpdater(this).setUpdateFrom(UpdateFrom.XML).setUpdateXML("https://baldaufwd.de/ZoomHelper/updatetest.xml");
-            appUpdater.setButtonUpdateClickListener((dialog, which) -> downloadAPK());
+            APKDownloader apkDownloader = new APKDownloader();
+            appUpdater.setButtonUpdateClickListener((dialog, which) -> apkDownloader.downloadAPK(this, "ZoomHelper.apk", Uri.parse("https://baldaufwd.de/ZoomHelper/ZoomHelper.apk")));
             appUpdater.start();
         }
     }
 
     @Override
     public void onWindowFocusChanged(boolean hasFocus) {
+        //check for importable meeting invitation from clipboard when ZoomHelper gained focus
         super.onWindowFocusChanged(hasFocus);
         if (hasFocus) {
             importFromClipboard();
         }
     }
 
-
-       /* private void watchImportIcon() {
-        ImageView ImportIcon = findViewById(R.id.imageImport);
-        ImportIcon.setOnClickListener(v -> importFromClipboard());
-    }
-
-    void importFromClipboard() {
-        Log.d("import", "ImportFromClipboard");
-        ClipboardManager clipboard = (ClipboardManager) getApplicationContext().getSystemService(CLIPBOARD_SERVICE);
-        Log.d("clipboardManager", clipboard.toString());
-        if (clipboard.hasPrimaryClip() && clipboard.getPrimaryClipDescription().hasMimeType(MIMETYPE_TEXT_PLAIN)) {
-            String text = clipboard.getPrimaryClip().getItemAt(0).getText().toString();
-            Log.d("text", text);
-            handleSendText(text);
-        }
-    } */
-
     private void importFromClipboard() {
-        LinearLayout layoutBegin = findViewById(R.id.layoutBegin);
-        ClipboardManager clipboard = (ClipboardManager) getApplicationContext().getSystemService(CLIPBOARD_SERVICE);
+        final LinearLayout layoutBegin = findViewById(R.id.layoutBegin);
+        final ClipboardManager clipboard = (ClipboardManager) getApplicationContext().getSystemService(CLIPBOARD_SERVICE);
 
-        Snackbar snackbar = Snackbar.make(layoutBegin,R.string.foundImportableMeetingClipboard,Snackbar.LENGTH_INDEFINITE).setDuration(7000);
+        Snackbar snackbar = Snackbar.make(layoutBegin, R.string.foundImportableMeetingClipboard, Snackbar.LENGTH_INDEFINITE).setDuration(7000);
         snackbar.setAction(R.string.importMeeting, view -> {
             String text = clipboard.getPrimaryClip().getItemAt(0).getText().toString();
             handleSendText(text);
@@ -211,77 +164,6 @@ public class MainActivity extends AppCompatActivity {
         }
     }
 
-
-    private void downloadAPK() {
-        String fileName = "ZoomHelper.apk";
-        File destination = new File(getExternalFilesDir(Environment.DIRECTORY_DOWNLOADS).getAbsolutePath(), fileName);
-
-/*
-        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED
-                || ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
-
-            // this will request for permission when user has not granted permission for the app
-            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1);
-            downloadAPK();
-        } else {*/
-            if (Build.VERSION.SDK_INT > Build.VERSION_CODES.O) {
-                if (!getPackageManager().canRequestPackageInstalls()) {
-                    Toast.makeText(this, R.string.PleaseAllowUnknownSources, Toast.LENGTH_LONG).show();
-                    startActivityForResult(new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES, Uri.parse("package:de.joel.zoomhelper")), 101);
-                    Timer timer = new Timer(true);
-                    timer.scheduleAtFixedRate(new TimerTask() {
-                        @Override
-                        public void run() {
-                            if (getPackageManager().canRequestPackageInstalls()) {
-                                finishActivity(101);
-                                downloadAPK();
-                                timer.cancel();
-                            }
-                        }
-                    }, 0, 1000);
-                    return;
-                }
-            }
-
-
-            //Delete update file if exists
-            final Uri localUri = FileProvider.getUriForFile(this, BuildConfig.APPLICATION_ID + ".provider", destination);
-            if (destination.exists())
-                //file.delete() - test this, I think sometimes it doesnt work
-                destination.delete();
-
-            //Download Script
-            DownloadManager downloadManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
-            Uri uri = Uri.parse("https://baldaufwd.de/ZoomHelper/ZoomHelper.apk");
-            DownloadManager.Request request = new DownloadManager.Request(uri);
-            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
-            Log.d("Desturi", localUri.getPath());
-            request.setDestinationInExternalFilesDir(this, Environment.DIRECTORY_DOWNLOADS, fileName);
-            final long downloadID = downloadManager.enqueue(request);
-
-            BroadcastReceiver onDownloadComplete = new BroadcastReceiver() {
-                @Override
-                public void onReceive(Context context, Intent intent) {
-                    //Fetching the download id received with the broadcast
-                    long id = intent.getLongExtra(DownloadManager.EXTRA_DOWNLOAD_ID, -1);
-                    //Checking if the received broadcast is for our enqueued download by matching download id
-                    if (downloadID == id) {
-                        Intent install = new Intent(Intent.ACTION_VIEW);
-                        install.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
-                        install.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
-                        install.putExtra(Intent.EXTRA_NOT_UNKNOWN_SOURCE, true);
-                        install.setDataAndType(localUri,
-                                downloadManager.getMimeTypeForDownloadedFile(downloadID));
-                        startActivity(install);
-
-                        unregisterReceiver(this);
-                    }
-                }
-            };
-            registerReceiver(onDownloadComplete, new IntentFilter(DownloadManager.ACTION_DOWNLOAD_COMPLETE));
-        }
-    //}
-
     private void handleSendText(Intent intent) {
         String sharedText = intent.getStringExtra(Intent.EXTRA_TEXT);
         handleSendText(sharedText);
@@ -299,15 +181,15 @@ public class MainActivity extends AppCompatActivity {
         if (sharedText != null) {
             Matcher matcher = Pattern.compile("(?i)(?<=(Meeting-ID:)|(Meeting\\sID:)|(ID:)).+").matcher(sharedText);
             if (matcher.find()) {
-                meetingID = matcher.group(0).trim();
+                meetingID = Objects.requireNonNull(matcher.group(0)).trim();
             }
             matcher = Pattern.compile("(?i)(?<=(Kenncode:)|(Passwort:)|(Passcode:)|(Password:)).+").matcher(sharedText);
             if (matcher.find()) {
-                meetingPWD = matcher.group(0).trim();
+                meetingPWD = Objects.requireNonNull(matcher.group(0)).trim();
             }
             matcher = Pattern.compile("(?i)(?<=(Thema:)|(Meeting\\sName:)|(Topic:)).+").matcher(sharedText);
             if (matcher.find()) {
-                meetingName = matcher.group(0).trim();
+                meetingName = Objects.requireNonNull(matcher.group(0)).trim();
             }
 
             AlertDialog.Builder builder = new AlertDialog.Builder(this);
@@ -316,9 +198,7 @@ public class MainActivity extends AppCompatActivity {
 
             if (meetingID.equals("")) {
                 builder.setMessage(R.string.importError);
-                builder.setPositiveButton(R.string.ok, (dialog, which) -> {
-                    dialog.dismiss();
-                });
+                builder.setPositiveButton(R.string.ok, (dialog, which) -> dialog.dismiss());
                 AlertDialog alert = builder.create();
                 if (!checkOnly) alert.show();
                 return false;
@@ -326,11 +206,11 @@ public class MainActivity extends AppCompatActivity {
 
                 Meeting mtgToImport = new Meeting(meetingName, meetingID, meetingPWD, "", "");
 
-                if (searchMeetingInList(getMeetings(), mtgToImport.meetingName) == -1 && !checkOnly) {
+                if (meetingsController.searchMeetingInList(meetingsController.getMeetings(), mtgToImport.meetingName) == -1 && !checkOnly) {
                     fillMeeting(mtgToImport);
                 } else {
                     builder.setPositiveButton(R.string.override, (dialog, which) -> {
-                        int found = searchMeetingInList(getMeetings(), mtgToImport.meetingName);
+                        int found = meetingsController.searchMeetingInList(meetingsController.getMeetings(), mtgToImport.meetingName);
                         importMeeting(mtgToImport, false);
                         fillMeeting(found);
                         dialog.dismiss();
@@ -345,43 +225,12 @@ public class MainActivity extends AppCompatActivity {
                     return true;
                 }
             }
-
-
-           /* AlertDialog.Builder builder = new AlertDialog.Builder(this);
-
-            builder.setTitle(R.string.app_name);
-
-            if (meetingID.equals("")) {
-                builder.setMessage(R.string.importError);
-                builder.setPositiveButton(R.string.ok, (dialog, which) -> {
-                    dialog.dismiss();
-                });
-            } else {
-                builder.setMessage(getString(R.string.wantToimportMeeting) + "\n" + mtgToImport.info());
-
-                builder.setPositiveButton(R.string.yes, (dialog, which) -> {
-                    dialog.dismiss();
-                    importMeetingToUI(mtgToImport);
-                });
-
-                builder.setNegativeButton(R.string.no, (dialog, which) -> {
-                    dialog.dismiss();
-                });
-            }
-
-            AlertDialog alert = builder.create();
-            alert.show();*/
         }
         return true;
     }
 
-    private void watchShortcutIcon() {
-        ImageView ShortcutIcon = findViewById(R.id.imageCreateShortcut);
-        ShortcutIcon.setOnClickListener(v -> showCreateShortcutUI());
-    }
-
     private void showCreateShortcutUI() {
-        int meeting = searchMeetingInList(getMeetings(), createCurrMeetingFromUI().meetingName);
+        int meeting = meetingsController.searchMeetingInList(meetingsController.getMeetings(), createCurrMeetingFromUI().meetingName);
 
         AlertDialog.Builder builder = new AlertDialog.Builder(this);
 
@@ -395,11 +244,8 @@ public class MainActivity extends AppCompatActivity {
                 showCreateShortcutUI();
 
             });
-            builder.setNegativeButton(R.string.cancel, (dialog, which) -> {
-                dialog.dismiss();
-            });
-        }
-        else {
+            builder.setNegativeButton(R.string.cancel, (dialog, which) -> dialog.dismiss());
+        } else {
             builder.setMessage(R.string.WantToJoinImmediately);
             builder.setPositiveButton(R.string.joinImmediately, (dialog, which) -> {
                 dialog.dismiss();
@@ -413,13 +259,10 @@ public class MainActivity extends AppCompatActivity {
         }
         AlertDialog alert = builder.create();
         alert.show();
-
-        //createMeetingShortcut(searchMeetingInList(getMeetings(), createCurrMeetingFromUI().meetingName), false);
     }
 
     private void createMeetingShortcut(int meetingIndex, boolean joinImmediately) {
-
-        Meeting meeting = getMeetings().get(meetingIndex);
+        Meeting meeting = meetingsController.getMeetings().get(meetingIndex);
 
         if (ShortcutManagerCompat.isRequestPinShortcutSupported(this)) {
             ShortcutInfoCompat shortcutInfo = new ShortcutInfoCompat.Builder(this, meeting.meetingName)
@@ -440,12 +283,6 @@ public class MainActivity extends AppCompatActivity {
         }
     }
 
-
-    private void watchShareIcon() {
-        ImageView ShareIcon = findViewById(R.id.imageShare);
-        ShareIcon.setOnClickListener(v -> shareMeeting(createCurrMeetingFromUI()));
-    }
-
     private void shareMeeting(Meeting meeting) {
         Intent sendIntent = new Intent();
         sendIntent.setAction(Intent.ACTION_SEND);
@@ -456,66 +293,7 @@ public class MainActivity extends AppCompatActivity {
         startActivity(shareIntent);
     }
 
-    private void watchNewIcon() {
-        ImageView AddIcon = findViewById(R.id.imageAdd);
-        EditText meetingID = findViewById(R.id.textBoxID);
-        AddIcon.setOnClickListener(v -> {
-            fillBlank();
-            meetingID.requestFocus();
-        });
-    }
-
-    private void watchAttIcon() {
-        ImageView AttIcon = findViewById(R.id.imageAttend);
-        AttIcon.setOnClickListener(v -> btnJoin_onClick(null));
-    }
-
-    private void watchDeleteIcon() {
-        ImageView trashIcon = findViewById(R.id.imageTrash);
-        trashIcon.setOnClickListener(v -> removeMeeting(searchMeetingInList(getMeetings(), createCurrMeetingFromUI().meetingName)));
-    }
-
-    private void removeMeeting(int meeting) {
-        ArrayList<Meeting> meetings = getMeetings();
-        if (meetings.size() > 0 && meeting != -1) {
-
-            AlertDialog.Builder builder = new AlertDialog.Builder(this);
-
-            builder.setTitle(R.string.app_name);
-            builder.setMessage(getString(R.string.suretoremove, meetings.get(meeting).meetingName));
-
-            builder.setPositiveButton(R.string.yes, (dialog, which) -> {
-                dialog.dismiss();
-                meetings.remove(meeting);
-                saveMeetingList(meetings);
-
-                if (meetings.size() > 1) {
-                    fillDropdownMeetingName();
-                    if (getLastMeeting() > meetings.size() - 1) {
-                        setLastMeeting(meetings.size() - 1);
-                        fillMeeting(getLastMeeting());
-                    }
-                } else if (meetings.size() == 1) {
-                    setLastMeeting(0);
-                    fillDropdownMeetingName();
-                    fillMeeting(getLastMeeting());
-                } else {
-                    setLastMeeting(-1);
-                    fillDropdownMeetingName();
-                    fillBlank();
-                }
-            });
-
-            builder.setNegativeButton(R.string.no, (dialog, which) -> dialog.dismiss());
-
-            AlertDialog alert = builder.create();
-            alert.show();
-
-        }
-    }
-
-
-    private void fillBlank() {
+    public void fillBlank() {
         EditText editMeetingName = findViewById(R.id.TextMeetingName);
         EditText editID = findViewById(R.id.textBoxID);
         EditText editPW = findViewById(R.id.editTextTextPassword2);
@@ -530,24 +308,9 @@ public class MainActivity extends AppCompatActivity {
         editAtt.setText("");
     }
 
-    private void watchSaveIcon() {
-        ImageView saveIcon = findViewById(R.id.imageSave);
-        saveIcon.setOnClickListener(v -> saveMeetingFromUI());
-    }
-
-    public void watchMeetingNameBox() {
-        EditText meetingNameBox = findViewById(R.id.TextMeetingName);
-        meetingNameBox.setOnFocusChangeListener((v, hasFocus) -> {
-            if (!hasFocus) {
-                fillWithSelectedMeeting();
-            }
-
-        });
-    }
-
     public void fillWithSelectedMeeting() {
         AutoCompleteTextView textMeetingName = findViewById(R.id.TextMeetingName);
-        int search = searchMeetingInList(getMeetings(), textMeetingName.getText().toString());
+        int search = meetingsController.searchMeetingInList(meetingsController.getMeetings(), textMeetingName.getText().toString());
         if (search != -1) {
             fillMeeting(search);
         }
@@ -555,7 +318,7 @@ public class MainActivity extends AppCompatActivity {
 
     @SuppressLint("ClickableViewAccessibility")
     public void fillDropdownMeetingName() {
-        ArrayList<Meeting> meetings = getMeetings();
+        ArrayList<Meeting> meetings = meetingsController.getMeetings();
 
         String[] meetingNames = new String[meetings.size()];
         for (int i = 0; i < meetings.size(); i++) {
@@ -563,7 +326,6 @@ public class MainActivity extends AppCompatActivity {
         }
 
         AutoCompleteTextView textMeetingName = findViewById(R.id.TextMeetingName);
-        //ImageView dropdown = findViewById(R.id.iconDropdownMeetingName);
         AutoSuggestAdapter adapter = new AutoSuggestAdapter(this, android.R.layout.simple_dropdown_item_1line);
         adapter.setData(Arrays.asList(meetingNames));
         textMeetingName.setAdapter(adapter);
@@ -571,16 +333,11 @@ public class MainActivity extends AppCompatActivity {
         textMeetingName.setOnTouchListener((paramView, paramMotionEvent) -> false);
 
         textMeetingName.setOnItemClickListener((arg0, view, arg2, arg3) -> fillWithSelectedMeeting());
-
-        /*dropdown.setOnClickListener(v -> {
-            textMeetingName.showDropDown();
-            adapter.getFilter().filter(null);
-        });*/
     }
 
     @SuppressLint("ClickableViewAccessibility")
     public void fillDropdownAttendeeName(int meetingIndex) {
-        Meeting meeting = getMeetings().get(meetingIndex);
+        Meeting meeting = meetingsController.getMeetings().get(meetingIndex);
         ArrayList<Attendee> attendees = meeting.attendees;
 
         String[] attNames = new String[attendees.size()];
@@ -589,29 +346,23 @@ public class MainActivity extends AppCompatActivity {
         }
 
         AutoCompleteTextView textName = findViewById(R.id.textBoxName);
-        //ImageView dropdown = findViewById(R.id.iconDropdownAttName);
         AutoSuggestAdapter adapter = new AutoSuggestAdapter(this, android.R.layout.simple_dropdown_item_1line);
+
         adapter.setData(Arrays.asList(attNames));
         textName.setAdapter(adapter);
 
         textName.setOnTouchListener((paramView, paramMotionEvent) -> false);
-
         textName.setOnItemClickListener((arg0, view, arg2, arg3) -> fillWithSelectedAtt(meetingIndex));
 
-        /*dropdown.setOnClickListener(v -> {
-            textName.showDropDown();
-            adapter.getFilter().filter(null);
-        });*/
     }
 
     private void fillWithSelectedAtt(int meetingIndex) {
         AutoCompleteTextView textName = findViewById(R.id.textBoxName);
         EditText editAtt = findViewById(R.id.editAtt);
-        int found = getMeetings().get(meetingIndex).searchAttendee(textName.getText().toString());
-        editAtt.setText(getMeetings().get(meetingIndex).attendees.get(found).num);
+        int found = meetingsController.getMeetings().get(meetingIndex).searchAttendee(textName.getText().toString());
+        editAtt.setText(meetingsController.getMeetings().get(meetingIndex).attendees.get(found).num);
     }
 
-
     public void fillMeeting(Meeting meeting) {
         EditText editMeetingName = findViewById(R.id.TextMeetingName);
         EditText editID = findViewById(R.id.textBoxID);
@@ -631,155 +382,18 @@ public class MainActivity extends AppCompatActivity {
     }
 
     public void fillMeeting(int id) {
-        fillMeeting(getMeetings().get(id));
+        fillMeeting(meetingsController.getMeetings().get(id));
         fillDropdownAttendeeName(id);
     }
 
-
-    private void launchZoomUrl(String url) {
-        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
-        if (intent.resolveActivity(getPackageManager()) != null) {
-            startActivity(intent);
-        }
-        if (testing) {
-            //For Debugging: Show URL in Alert
-            AlertDialog.Builder dialog = new AlertDialog.Builder(this);
-            dialog.setMessage(url);
-            dialog.setTitle("Zoom URL (for testing)");
-            AlertDialog alertDialog = dialog.create();
-            alertDialog.show();
-        }
-    }
-
-
-    private String buildZoomURL(String confno, String pwd, String name, String attendees) {
-        Uri.Builder builder = new Uri.Builder();
-        builder.scheme("zoomus")
-                .authority("zoom.us")
-                .appendPath("join")
-                .appendQueryParameter("confno", confno.replace(" ", ""))
-                .appendQueryParameter("pwd", pwd);
-
-        if (!Objects.equals(attendees, "")) {
-            builder.appendQueryParameter("uname", name + " (" + attendees + ")");
-        } else
-            builder.appendQueryParameter("uname", name);
-        return builder.build().toString();
-    }
-
-    public String meetingsToString(ArrayList<Meeting> listMeetings) {
-        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
-        ObjectOutputStream objOutputStream = null;
-        try {
-            objOutputStream = new ObjectOutputStream(byteArrayOutputStream);
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        for (Object obj : listMeetings) {
-
-            try {
-                if (objOutputStream == null) throw new AssertionError();
-                objOutputStream.writeObject(obj);
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-            try {
-                objOutputStream.reset();
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-        }
-        try {
-            if (objOutputStream == null) throw new AssertionError();
-            objOutputStream.close();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        return Base64.encodeToString(byteArrayOutputStream.toByteArray(), 0);
-    }
-
-
-    public ArrayList<Meeting> stringToMeetings(String string) {
-        byte[] bytes = Base64.decode(string, 0);
-
-        ArrayList<Meeting> listMeetings = new ArrayList<>();
-        ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
-        ObjectInputStream obj = null;
-        try {
-            obj = new ObjectInputStream(bis);
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-        try {
-            while (bis.available() != -1) {
-                //Read object from file
-                if (obj == null) throw new AssertionError();
-                Meeting meeting = (Meeting) obj.readObject();
-                listMeetings.add(meeting);
-            }
-        } catch (EOFException ex) {
-            //ex.printStackTrace();
-        } catch (IOException | ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-        return listMeetings;
-    }
-
-    @SuppressLint("ApplySharedPref")
-    public void saveMeetingList(ArrayList<Meeting> meetingList) {
-        SharedPreferences mPrefs = getPreferences(MODE_PRIVATE);
-        SharedPreferences.Editor prefsEditor = mPrefs.edit();
-        prefsEditor.putString("Meetings", meetingsToString(meetingList));
-        prefsEditor.commit();
-    }
-
-    @SuppressLint("ApplySharedPref")
-    public void setLastMeeting(int id) {
-        SharedPreferences mPrefs = getPreferences(MODE_PRIVATE);
-        SharedPreferences.Editor prefsEditor = mPrefs.edit();
-        prefsEditor.putInt("LastMeeting", id);
-        prefsEditor.commit();
-    }
-
-    public int getLastMeeting() {
-        SharedPreferences mPrefs = getPreferences(MODE_PRIVATE);
-        return mPrefs.getInt("LastMeeting", -1);
-    }
-
-
-    public ArrayList<Meeting> getMeetings() {
-        SharedPreferences mPrefs = getPreferences(MODE_PRIVATE);
-        String value = mPrefs.getString("Meetings", "");
-        ArrayList<Meeting> meetingList;
-        if (value.equals("")) {
-            meetingList = new ArrayList<>();
-        } else {
-            meetingList = stringToMeetings(value);
-        }
-        return meetingList;
-    }
-
-    public int searchMeetingInList(ArrayList<Meeting> meetings, String name) {
-        int found = -1;
-        for (int i = 0; i < meetings.size(); i++) {
-            if (meetings.get(i).meetingName.equals(name)) {
-                found = i;
-                break;
-            }
-        }
-        return found;
-    }
-
     public void btnSave_onClick(View view) {
         saveMeetingFromUI();
     }
 
-
     public void btnJoin_onClick(View view) {
         saveMeetingFromUI();
         Meeting currMeeting = createCurrMeetingFromUI();
-        String url = buildZoomURL(currMeeting.meetingID, currMeeting.meetingPWD, currMeeting.attendees.get(currMeeting.lastAtt).name, currMeeting.attendees.get(currMeeting.lastAtt).num);
-        launchZoomUrl(url);
+        new ZoomLink(this, currMeeting).launch();
     }
 
     public Meeting createCurrMeetingFromUI() {
@@ -792,31 +406,30 @@ public class MainActivity extends AppCompatActivity {
         return new Meeting(editMeetingName.getText().toString(), editID.getText().toString(), editPW.getText().toString(), editName.getText().toString(), editAtt.getText().toString());
     }
 
-
     public void importMeeting(Meeting meeting, boolean updateAttendee) {
-        ArrayList<Meeting> listMeetings = getMeetings();
-        int foundCurr = searchMeetingInList(listMeetings, meeting.meetingName);
+        ArrayList<Meeting> listMeetings = meetingsController.getMeetings();
+        int foundCurr = meetingsController.searchMeetingInList(listMeetings, meeting.meetingName);
         if (foundCurr == -1) {
             listMeetings.add(meeting);
             if (listMeetings.size() == 1) {
-                setLastMeeting(0);
+                meetingsController.setLastMeeting(0);
             } else {
-                setLastMeeting(listMeetings.size() - 1);
+                meetingsController.setLastMeeting(listMeetings.size() - 1);
             }
 
         } else {
-            Meeting currMeeting = getMeetings().get(foundCurr);
+            Meeting currMeeting = meetingsController.getMeetings().get(foundCurr);
             currMeeting.meetingID = meeting.meetingID;
             currMeeting.meetingPWD = meeting.meetingPWD;
             if (updateAttendee)
                 currMeeting.updateAttendee(meeting.attendees.get(0).name, meeting.attendees.get(0).num);
             listMeetings.set(foundCurr, currMeeting);
-            setLastMeeting(foundCurr);
+            meetingsController.setLastMeeting(foundCurr);
         }
-        saveMeetingList(listMeetings);
+        meetingsController.saveMeetingList(listMeetings);
         fillDropdownMeetingName();
-        fillDropdownAttendeeName(getLastMeeting());
-        Toast.makeText(getApplicationContext(), "Meeting gespeichert", Toast.LENGTH_SHORT).show();
+        fillDropdownAttendeeName(meetingsController.getLastMeeting());
+        Toast.makeText(getApplicationContext(), R.string.meetingSaved, Toast.LENGTH_SHORT).show();
     }
 
     public void importMeeting(Meeting meeting) {
@@ -829,7 +442,7 @@ public class MainActivity extends AppCompatActivity {
         if (currMeetingUI.meetingID.equals("")) {
             EditText editID = findViewById(R.id.textBoxID);
             editID.requestFocus();
-            editID.setError("Meeting kann nicht ohne ID gespeichert werden!");
+            editID.setError(getString(R.string.meetingWithoutID));
             return;
         } else if (currMeetingUI.meetingName.equals("")) {
             EditText editMName = findViewById(R.id.TextMeetingName);
@@ -838,69 +451,4 @@ public class MainActivity extends AppCompatActivity {
         }
         importMeeting(currMeetingUI);
     }
-
-}
-
-
-class Attendee implements Serializable {
-    public String name;
-    public String num;
-
-    public Attendee(String name, String num) {
-        this.name = name;
-        this.num = num;
-    }
-}
-
-class Meeting implements Serializable {
-    public String meetingName;
-    public String meetingID;
-    public String meetingPWD;
-    public ArrayList<Attendee> attendees;
-    public int lastAtt;
-
-    public Meeting(String meetingName, String meetingID, String meetingPWD, String nameAttendee, String numAttendee) {
-        this.meetingName = meetingName;
-        this.meetingID = meetingID;
-        this.meetingPWD = meetingPWD;
-        this.attendees = new ArrayList<>();
-        Attendee attendee = new Attendee(nameAttendee, numAttendee);
-        this.attendees.add(attendee);
-        this.lastAtt = 0;
-    }
-
-    public void addAttendee(String name, String num) {
-        Attendee attendee = new Attendee(name, num);
-        this.attendees.add(attendee);
-        this.lastAtt = attendees.size() - 1;
-    }
-
-    public int searchAttendee(String name) {
-        int found = -1;
-        for (int i = 0; i < this.attendees.size(); i++) {
-            if (this.attendees.get(i).name.equals(name)) {
-                found = i;
-                break;
-            }
-        }
-        return found;
-    }
-
-    public void updateAttendee(String name, String num) {
-
-        int found = searchAttendee(name);
-
-        if (found == -1) {
-            addAttendee(name, num);
-        } else {
-            this.attendees.get(found).num = num;
-            this.lastAtt = found;
-        }
-    }
-
-    public String info() {
-        return "Meeting Name: " + this.meetingName + "\n" +
-                "Meeting-ID: " + this.meetingID + "\n" +
-                "Kenncode: " + this.meetingPWD;
-    }
 }

app/src/main/java/de/joel/zoomhelper/Meeting.java

@@ -0,0 +1,58 @@
+package de.joel.zoomhelper;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+public class Meeting implements Serializable {
+    private static final long serialVersionUID = 2606722401897866931L;
+    public String meetingName;
+    public String meetingID;
+    public String meetingPWD;
+    public ArrayList<Attendee> attendees;
+    public int lastAtt;
+
+    public Meeting(String meetingName, String meetingID, String meetingPWD, String nameAttendee, String numAttendee) {
+        this.meetingName = meetingName;
+        this.meetingID = meetingID;
+        this.meetingPWD = meetingPWD;
+        this.attendees = new ArrayList<>();
+        Attendee attendee = new Attendee(nameAttendee, numAttendee);
+        this.attendees.add(attendee);
+        this.lastAtt = 0;
+    }
+
+    public void addAttendee(String name, String num) {
+        Attendee attendee = new Attendee(name, num);
+        this.attendees.add(attendee);
+        this.lastAtt = attendees.size() - 1;
+    }
+
+    public int searchAttendee(String name) {
+        int found = -1;
+        for (int i = 0; i < this.attendees.size(); i++) {
+            if (this.attendees.get(i).name.equals(name)) {
+                found = i;
+                break;
+            }
+        }
+        return found;
+    }
+
+    public void updateAttendee(String name, String num) {
+
+        int found = searchAttendee(name);
+
+        if (found == -1) {
+            addAttendee(name, num);
+        } else {
+            this.attendees.get(found).num = num;
+            this.lastAtt = found;
+        }
+    }
+
+    public String info() {
+        return "Meeting Name: " + this.meetingName + "\n" +
+                "Meeting-ID: " + this.meetingID + "\n" +
+                "Kenncode: " + this.meetingPWD;
+    }
+}

app/src/main/java/de/joel/zoomhelper/MeetingsController.java

@@ -0,0 +1,172 @@
+package de.joel.zoomhelper;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.util.Base64;
+
+import androidx.appcompat.app.AlertDialog;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.EOFException;
+import java.io.IOException;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.util.ArrayList;
+
+public class MeetingsController {
+    private final Context context;
+    private final Activity activity;
+
+    public MeetingsController(Context context) {
+        this.context = context;
+        this.activity = (Activity) context;
+    }
+
+
+
+    public String meetingsToString(ArrayList<Meeting> listMeetings) {
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
+        ObjectOutputStream objOutputStream = null;
+        try {
+            objOutputStream = new ObjectOutputStream(byteArrayOutputStream);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        for (Object obj : listMeetings) {
+
+            try {
+                if (objOutputStream == null) throw new AssertionError();
+                objOutputStream.writeObject(obj);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+            try {
+                objOutputStream.reset();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        try {
+            if (objOutputStream == null) throw new AssertionError();
+            objOutputStream.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return Base64.encodeToString(byteArrayOutputStream.toByteArray(), 0);
+    }
+
+
+    public ArrayList<Meeting> stringToMeetings(String string) {
+        byte[] bytes = Base64.decode(string, 0);
+
+        ArrayList<Meeting> listMeetings = new ArrayList<>();
+        ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
+        ObjectInputStream obj = null;
+        try {
+            obj = new ObjectInputStream(bis);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        try {
+            while (bis.available() != -1) {
+                //Read object from file
+                if (obj == null) throw new AssertionError();
+                Meeting meeting = (Meeting) obj.readObject();
+                listMeetings.add(meeting);
+            }
+        } catch (EOFException ex) {
+            //ex.printStackTrace();
+        } catch (IOException | ClassNotFoundException e) {
+            e.printStackTrace();
+        }
+        return listMeetings;
+    }
+
+    @SuppressLint("ApplySharedPref")
+    public void saveMeetingList(ArrayList<Meeting> meetingList) {
+        SharedPreferences mPrefs = activity.getPreferences(Context.MODE_PRIVATE);
+        SharedPreferences.Editor prefsEditor = mPrefs.edit();
+        prefsEditor.putString("Meetings", meetingsToString(meetingList));
+        prefsEditor.commit();
+    }
+
+    @SuppressLint("ApplySharedPref")
+    public void setLastMeeting(int id) {
+        SharedPreferences mPrefs = activity.getPreferences(Context.MODE_PRIVATE);
+        SharedPreferences.Editor prefsEditor = mPrefs.edit();
+        prefsEditor.putInt("LastMeeting", id);
+        prefsEditor.commit();
+    }
+
+    public int getLastMeeting() {
+        SharedPreferences mPrefs = activity.getPreferences(Context.MODE_PRIVATE);
+        return mPrefs.getInt("LastMeeting", -1);
+    }
+
+
+    public ArrayList<Meeting> getMeetings() {
+        SharedPreferences mPrefs = activity.getPreferences(Context.MODE_PRIVATE);
+        String value = mPrefs.getString("Meetings", "");
+        ArrayList<Meeting> meetingList;
+        if (value.equals("")) {
+            meetingList = new ArrayList<>();
+        } else {
+            meetingList = stringToMeetings(value);
+        }
+        return meetingList;
+    }
+
+    public void removeMeeting(int meeting) {
+        MainActivity act = (MainActivity)context;
+        ArrayList<Meeting> meetings = getMeetings();
+        if (meetings.size() > 0 && meeting != -1) {
+
+            AlertDialog.Builder builder = new AlertDialog.Builder(context);
+
+            builder.setTitle(R.string.app_name);
+            builder.setMessage(context.getString(R.string.suretoremove, meetings.get(meeting).meetingName));
+
+            builder.setPositiveButton(R.string.yes, (dialog, which) -> {
+                dialog.dismiss();
+                meetings.remove(meeting);
+                saveMeetingList(meetings);
+
+                if (meetings.size() > 1) {
+                    act.fillDropdownMeetingName();
+                    if (getLastMeeting() > meetings.size() - 1) {
+                        setLastMeeting(meetings.size() - 1);
+                        act.fillMeeting(getLastMeeting());
+                    }
+                } else if (meetings.size() == 1) {
+                    setLastMeeting(0);
+                    act.fillDropdownMeetingName();
+                    act.fillMeeting(getLastMeeting());
+                } else {
+                    setLastMeeting(-1);
+                    act.fillDropdownMeetingName();
+                    act.fillBlank();
+                }
+            });
+
+            builder.setNegativeButton(R.string.no, (dialog, which) -> dialog.dismiss());
+
+            AlertDialog alert = builder.create();
+            alert.show();
+
+        }
+    }
+
+    public int searchMeetingInList(ArrayList<Meeting> meetings, String name) {
+        int found = -1;
+        for (int i = 0; i < meetings.size(); i++) {
+            if (meetings.get(i).meetingName.equals(name)) {
+                found = i;
+                break;
+            }
+        }
+        return found;
+    }
+}

app/src/main/java/de/joel/zoomhelper/ZoomLink.java

@@ -0,0 +1,51 @@
+package de.joel.zoomhelper;
+
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+
+import java.util.Objects;
+
+public class ZoomLink {
+    private final Meeting meeting;
+    private final Context context;
+
+    public ZoomLink(Context context, Meeting meeting) {
+        this.meeting = meeting;
+        this.context = context;
+    }
+
+
+
+
+    private String buildZoomURL() {
+        Uri.Builder builder = new Uri.Builder();
+        builder.scheme("zoomus")
+                .authority("zoom.us")
+                .appendPath("join")
+                .appendQueryParameter("confno", this.meeting.meetingID.replace(" ", ""))
+                .appendQueryParameter("pwd", this.meeting.meetingPWD);
+
+        if (!Objects.equals(this.meeting.attendees.get(this.meeting.lastAtt).num, "")) {
+            builder.appendQueryParameter("uname", this.meeting.attendees.get(this.meeting.lastAtt).name + " (" + this.meeting.attendees.get(this.meeting.lastAtt).num + ")");
+        } else
+            builder.appendQueryParameter("uname", this.meeting.attendees.get(this.meeting.lastAtt).name);
+        return builder.build().toString();
+    }
+
+    public void launch() {
+        String url = buildZoomURL();
+        Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
+        if (intent.resolveActivity(context.getPackageManager()) != null) {
+            context.startActivity(intent);
+        }
+        /*if (testing) {
+            //For Debugging: Show URL in Alert
+            AlertDialog.Builder dialog = new AlertDialog.Builder(this);
+            dialog.setMessage(url);
+            dialog.setTitle("Zoom URL (for testing)");
+            AlertDialog alertDialog = dialog.create();
+            alertDialog.show();
+        }*/
+    }
+}

app/src/main/res/values/strings.xml

@@ -28,7 +28,7 @@
     <string name="alwaysAsk">Dialog immer anzeigen</string>
     <string name="wantToimportMeeting">Möchtest du das folgende Meeting importieren?</string>
     <string name="importError">"Dieser Text entspricht keinem für ZoomHelper bekannten Meetingeinladungs-Muster "</string>
-    <string name="ok">ok</string>
+    <string name="ok">OK</string>
     <string name="meetingAlreadyExists">Meeting unter diesem Namen existiert schon. Bitte umbenennen, ansonsten wird es beim Speichern überschrieben</string>
     <string name="override">überschreiben</string>
     <string name="rename">umbenennen</string>
@@ -39,5 +39,7 @@
     <string name="cantCreateShortcut">Du musst das Meeting zunächst speichern, bevor du eine Verknüpfung dazu erstellen kannst</string>
     <string name="saveMeeting">Meeting speichern</string>
     <string name="cancel">abbrechen</string>
+    <string name="meetingSaved">Meeting gespeichert</string>
+    <string name="meetingWithoutID">Meeting kann nicht ohne ID gespeichert werden!</string>
 
 </resources>