add new Classes, reordering, update build settings

app/build.gradle

@@ -11,7 +11,7 @@ android {
         minSdkVersion 21
         targetSdkVersion 30
         versionCode 14
-        versionName '0.5'
+        versionName '0.5.1 beta'
 
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }

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 +1,13 @@
+package de.joel.zoomhelper;
+
+import java.io.Serializable;
+
+public class Attendee implements Serializable {
+    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 +1,13 @@
 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 +18,6 @@ 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;
@@ -40,51 +30,25 @@ 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;
 
-
     @Override
     protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
 
         Intent myIntent = getIntent(); // gets the previously created intent
         String action = myIntent.getAction();
@@ -95,7 +59,7 @@ public class MainActivity extends AppCompatActivity {
         boolean joinImmediately = myIntent.getBooleanExtra("joinImmediately", false);
         testing = myIntent.getBooleanExtra("testing", false);
 
-        super.onCreate(savedInstanceState);
+
 
         setContentView(R.layout.activity_main);
         final ScrollView scrollview = findViewById(R.id.scrollArea);
@@ -127,7 +91,7 @@ public class MainActivity extends AppCompatActivity {
 
         //watchMeetingNameBox();
         fillDropdownMeetingName();
-        if (getLastMeeting() != -1) {
+        /*if (getLastMeeting() != -1) {
             try {
                 fillMeeting(getLastMeeting());
                 scrollview.post(() -> scrollview.scrollTo(0, scrollview.getChildAt(0).getHeight()));
@@ -140,7 +104,7 @@ public class MainActivity extends AppCompatActivity {
                 setLastMeeting(-1);
                 saveMeetingList(new ArrayList<>());
             }
-        }
+        }*/
         watchSaveIcon();
         watchAttIcon();
         watchDeleteIcon();
@@ -159,8 +123,9 @@ public class MainActivity extends AppCompatActivity {
             String url = buildZoomURL(currMeeting.meetingID, currMeeting.meetingPWD, currMeeting.attendees.get(currMeeting.lastAtt).name, currMeeting.attendees.get(currMeeting.lastAtt).num);
             launchZoomUrl(url);
         } else {
-            AppUpdater appUpdater = new AppUpdater(this).setUpdateFrom(UpdateFrom.XML).setUpdateXML("https://baldaufwd.de/ZoomHelper/update.xml");
+            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();
         }
     }
@@ -174,22 +139,6 @@ public class MainActivity extends AppCompatActivity {
     }
 
 
-       /* 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);
@@ -211,77 +160,6 @@ 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);
@@ -345,32 +223,6 @@ 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;
     }
@@ -515,7 +367,7 @@ public class MainActivity extends AppCompatActivity {
     }
 
 
-    private void fillBlank() {
+    public void fillBlank() {
         EditText editMeetingName = findViewById(R.id.TextMeetingName);
         EditText editID = findViewById(R.id.textBoxID);
         EditText editPW = findViewById(R.id.editTextTextPassword2);
@@ -839,68 +691,4 @@ 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 +1,57 @@
+package de.joel.zoomhelper;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+
+public 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/MeetingsController.java

@@ -0,0 +1,159 @@
+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 Context context;
+
+    public MeetingsController(Context context) {
+        this.context = context;
+    }
+
+    Activity 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;
+    }
+
+    private 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();
+
+        }
+    }
+}

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();
+        }*/
+    }
+}