diff --git a/app/build.gradle b/app/build.gradle
index 481ea0c..1b1b749 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -8,7 +8,7 @@ android {
 
     defaultConfig {
         applicationId "de.joel.zoomhelper"
-        minSdkVersion 16
+        minSdkVersion 21
         targetSdkVersion 30
         versionCode 1
         versionName '0.2'
diff --git a/app/src/main/java/de/joel/zoomhelper/MainActivity.java b/app/src/main/java/de/joel/zoomhelper/MainActivity.java
index ea66455..cc4a1ab 100644
--- a/app/src/main/java/de/joel/zoomhelper/MainActivity.java
+++ b/app/src/main/java/de/joel/zoomhelper/MainActivity.java
@@ -14,11 +14,14 @@ import android.util.AttributeSet;
 import android.util.Base64;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
 import android.widget.ArrayAdapter;
 import android.widget.AutoCompleteTextView;
 import android.widget.EditText;
 import android.widget.ImageView;
 import android.widget.ListPopupWindow;
+import android.widget.Toast;
 
 import java.io.ByteArrayInputStream;
 import java.io.ByteArrayOutputStream;
@@ -436,6 +439,7 @@ public class MainActivity extends AppCompatActivity {
         }
         saveMeetingList(listMeetings);
         fillDropdownMeetingName();
+        Toast.makeText(getApplicationContext(),"Meeting gespeichert",Toast.LENGTH_SHORT).show();
     }
 
 }
diff --git a/app/src/main/res/layout-v26/activity_main.xml b/app/src/main/res/layout-v26/activity_main.xml
new file mode 100644
index 0000000..2777730
--- /dev/null
+++ b/app/src/main/res/layout-v26/activity_main.xml
@@ -0,0 +1,251 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    tools:context=".MainActivity">
+
+    <ImageView
+        android:id="@+id/image2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="284dp"
+        android:layout_marginTop="380dp"
+        android:padding="5dp"
+        android:src="@mipmap/baseline_arrow_drop_down_black_24"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        android:focusable="true" />
+
+    <EditText
+        android:id="@+id/editAtt"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="468dp"
+        android:ems="10"
+        android:inputType="number"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <de.joel.zoomhelper.InstantAutoComplete
+        android:id="@+id/textBoxName"
+        android:layout_width="215dp"
+        android:layout_height="39dp"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="380dp"
+        android:inputType="text"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/textName"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="360dp"
+        android:text="@string/DisplayName"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/textAtt"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="448dp"
+        android:text="@string/AttendeesInput"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/btnJoin"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="120dp"
+        android:layout_marginTop="556dp"
+        android:onClick="btnJoin_onClick"
+        android:text="@string/Join"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.561"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <Button
+        android:id="@+id/btnSave"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="50dp"
+        android:layout_marginTop="556dp"
+        android:onClick="btnSave_onClick"
+        android:text="@string/Save"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="0.02"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <com.google.android.material.textfield.TextInputLayout
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="272dp"
+        android:background="@android:color/transparent"
+        app:boxBackgroundColor="@android:color/transparent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:passwordToggleDrawable="@drawable/show_password_selector"
+        app:passwordToggleEnabled="true">
+
+        <EditText
+            android:id="@+id/editTextTextPassword2"
+            android:layout_width="212dp"
+            android:layout_height="wrap_content"
+            android:ems="10"
+            android:inputType="textPassword"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toTopOf="parent" />
+
+    </com.google.android.material.textfield.TextInputLayout>
+
+    <EditText
+        android:id="@+id/textBoxID"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="192dp"
+        android:ems="10"
+        android:inputType="text"
+        android:focusable="true"
+        android:focusableInTouchMode="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/textID"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="172dp"
+        android:text="@string/MeetingID"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/textPW"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="253dp"
+        android:text="@string/Password"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <TextView
+        android:id="@+id/textMeetingName"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="48dp"
+        android:text="@string/MeetingName"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <de.joel.zoomhelper.InstantAutoComplete
+        android:id="@+id/TextMeetingName"
+        android:layout_width="215dp"
+        android:layout_height="39dp"
+        android:layout_marginStart="72dp"
+        android:layout_marginTop="67dp"
+        android:inputType="text"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <ImageView
+        android:id="@+id/image"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="284dp"
+        android:layout_marginTop="67dp"
+        android:padding="5dp"
+        android:src="@mipmap/baseline_arrow_drop_down_black_24"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        android:focusable="true" />
+
+    <ImageView
+        android:id="@+id/imageAttend"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="282dp"
+        android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/iconfinder_phone_7124181_32"
+        android:tooltipText="@string/joinTooltip"
+        android:focusable="true" />
+
+    <ImageView
+        android:id="@+id/imageTrash"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="140dp"
+        android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/iconfinder_trash_7124159_32"
+        android:tooltipText="@string/deleteTooltip"
+        android:focusable="true" />
+
+    <ImageView
+        android:id="@+id/imageSave"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="188dp"
+        android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/iconfinder_save_7124134_32"
+        android:tooltipText="@string/saveTooltip"
+        android:focusable="true" />
+
+    <ImageView
+        android:id="@+id/imageShare"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="236dp"
+        android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/iconfinder_share_7124186_32"
+        android:tooltipText="@string/shareTooltip"
+        android:focusable="true" />
+
+    <ImageView
+        android:id="@+id/imageAdd"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="92dp"
+        android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:srcCompat="@drawable/iconfinder_pluscircle_7124019_32"
+        android:tooltipText="@string/addTooltip"
+        android:focusable="true" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index 98b5f93..8158e2c 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -11,19 +11,20 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="284dp"
-        android:layout_marginLeft="284dp"
         android:layout_marginTop="380dp"
         android:padding="5dp"
         android:src="@mipmap/baseline_arrow_drop_down_black_24"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        android:focusable="true" />
 
     <EditText
         android:id="@+id/editAtt"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="468dp"
         android:ems="10"
         android:inputType="number"
@@ -35,7 +36,6 @@
         android:layout_width="215dp"
         android:layout_height="39dp"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="380dp"
         android:inputType="text"
         app:layout_constraintStart_toStartOf="parent"
@@ -47,9 +47,8 @@
         android:layout_height="wrap_content"
 
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="360dp"
-        android:text="Name"
+        android:text="@string/DisplayName"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
@@ -58,9 +57,8 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="448dp"
-        android:text="Anzahl der Teilnehmer"
+        android:text="@string/AttendeesInput"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
@@ -69,10 +67,9 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="120dp"
-        android:layout_marginLeft="120dp"
         android:layout_marginTop="556dp"
         android:onClick="btnJoin_onClick"
-        android:text="teilnehmen"
+        android:text="@string/Join"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="0.561"
         app:layout_constraintStart_toStartOf="parent"
@@ -83,10 +80,9 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="50dp"
-        android:layout_marginLeft="120dp"
         android:layout_marginTop="556dp"
         android:onClick="btnSave_onClick"
-        android:text="speichern"
+        android:text="@string/Save"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintHorizontal_bias="0.02"
         app:layout_constraintStart_toStartOf="parent"
@@ -96,7 +92,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="272dp"
         android:background="@android:color/transparent"
         app:boxBackgroundColor="@android:color/transparent"
@@ -121,7 +116,6 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="192dp"
         android:ems="10"
         android:inputType="text"
@@ -135,9 +129,8 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="172dp"
-        android:text="ID"
+        android:text="@string/MeetingID"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
@@ -146,9 +139,8 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="253dp"
-        android:text="Password"
+        android:text="@string/Password"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
@@ -157,9 +149,8 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="48dp"
-        android:text="Meeting Name"
+        android:text="@string/MeetingName"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
@@ -168,7 +159,6 @@
         android:layout_width="215dp"
         android:layout_height="39dp"
         android:layout_marginStart="72dp"
-        android:layout_marginLeft="72dp"
         android:layout_marginTop="67dp"
         android:inputType="text"
         app:layout_constraintStart_toStartOf="parent"
@@ -179,66 +169,78 @@
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="284dp"
-        android:layout_marginLeft="287dp"
         android:layout_marginTop="67dp"
         android:padding="5dp"
         android:src="@mipmap/baseline_arrow_drop_down_black_24"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        android:focusable="true" />
 
     <ImageView
         android:id="@+id/imageAttend"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="282dp"
-        android:layout_marginLeft="282dp"
         android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/iconfinder_phone_7124181_32" />
+        app:srcCompat="@drawable/iconfinder_phone_7124181_32"
+        android:focusable="true" />
 
     <ImageView
         android:id="@+id/imageTrash"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="187dp"
-        android:layout_marginLeft="187dp"
+        android:layout_marginStart="140dp"
         android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/iconfinder_trash_7124159_32" />
+        app:srcCompat="@drawable/iconfinder_trash_7124159_32"
+        android:focusable="true" />
 
     <ImageView
         android:id="@+id/imageSave"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="235dp"
-        android:layout_marginLeft="235dp"
+        android:layout_marginStart="188dp"
         android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/iconfinder_save_7124134_32" />
+        app:srcCompat="@drawable/iconfinder_save_7124134_32"
+        android:focusable="true" />
 
     <ImageView
         android:id="@+id/imageShare"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginStart="140dp"
-        android:layout_marginLeft="140dp"
+        android:layout_marginStart="236dp"
         android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/iconfinder_share_7124186_32" />
+        app:srcCompat="@drawable/iconfinder_share_7124186_32"
+        android:focusable="true" />
 
     <ImageView
         android:id="@+id/imageAdd"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginStart="92dp"
-        android:layout_marginLeft="92dp"
         android:layout_marginTop="128dp"
+        android:background="?attr/selectableItemBackgroundBorderless"
+        android:clickable="true"
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/iconfinder_pluscircle_7124019_32" />
+        app:srcCompat="@drawable/iconfinder_pluscircle_7124019_32"
+        android:focusable="true" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 9c2c135..d89fa52 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1,3 +1,16 @@
 <resources>
     <string name="app_name">ZoomHelper</string>
+    <string name="addTooltip">Neues Meeting hinzufügen</string>
+    <string name="DisplayName">Name:</string>
+    <string name="AttendeesInput">Anzahl der Teilnehmer:</string>
+    <string name="Join">Teilnehmen</string>
+    <string name="Save">Speichern</string>
+    <string name="deleteTooltip">Meeting entfernen</string>
+    <string name="saveTooltip">Angaben zum Meeting speichern</string>
+    <string name="shareTooltip">Meeting Info teilen</string>
+    <string name="joinTooltip">An Zoom Meeting teilnehmen</string>
+    <string name="MeetingID">Meeting-ID:</string>
+    <string name="Password">Kenncode:</string>
+    <string name="MeetingName">Meeting Name:</string>
+
 </resources>
\ No newline at end of file