Animation implementiert

Author: MDecker-MobileComputing

app/src/main/java/de/eldecker/droid/romanhelden/MainActivity.java

@@ -7,11 +7,14 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.graphics.drawable.Animatable;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
+import android.view.animation.Animation;
+import android.view.animation.AnimationUtils;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -135,11 +138,25 @@ private void neuerName() {
         _nameRecord = erzeugeName( genreEnum );
         String name = _nameRecord.toString();
         _nameTextView.setText( name );
+        starteAnimation();
 
         namenZaehlerErhoehen();
     }
 
 
+    /**
+     * Tween-Animation auf (neu erzeugten) Namen anwenden.
+     */
+    private void starteAnimation() {
+
+        Animation tweenAnimation =
+                AnimationUtils.loadAnimation( this,
+                                              R.anim.tween_animation );
+
+        _nameTextView.startAnimation( tweenAnimation );
+    }
+
+
     /**
      * Zähler für Anzahl der erzeugten Namen in SharedPreferences um 1 erhöhen.
      */

app/src/main/res/anim/tween_animation.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <alpha
+        android:fromAlpha="0.1"
+        android:toAlpha="1.0"
+        android:duration="1500" />
+
+    <scale
+        android:fromXScale="0.1"
+        android:toXScale="1.0"
+        android:fromYScale="0.1"
+        android:toYScale="1.0"
+        android:pivotX="50%"
+        android:pivotY="50%"
+        android:duration="1500" />
+
+</set>

app/src/main/res/layout/activity_main.xml

@@ -34,7 +34,7 @@
             android:text="@string/name_beispiel"
             android:textStyle="bold"
             android:gravity="center_horizontal|center_vertical"
-            android:textSize="40sp"
+            android:textSize="50sp"
             app:layout_constraintBottom_toBottomOf="parent"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"