Sunday, January 22, 2012

Start and Stop frame animation with AnimationDrawable

Modify from the last exercise "Create frame animation with AnimationDrawable", add two buttons top start and stop frame animation by calling AnimationDrawable.start() and AnimationDrawable.stop()

Start and Stop frame animation with AnimationDrawable

package com.exercise.AndroidAnimation;

import android.app.Activity;
import android.graphics.drawable.AnimationDrawable;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

public class AndroidAnimationActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    ImageView myAnimation = (ImageView)findViewById(R.id.myanimation);
    final AnimationDrawable myAnimationDrawable
     = (AnimationDrawable)myAnimation.getDrawable();

    Button startAnimation = (Button)findViewById(R.id.startanimation);
    Button stopAnimation = (Button)findViewById(R.id.stopanimation);

    startAnimation.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    if(!myAnimationDrawable.isRunning()){
     myAnimationDrawable.start();
    }
   }});

    stopAnimation.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    if(myAnimationDrawable.isRunning()){
     myAnimationDrawable.stop();
    }
   }});
}
}


main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello" />
<Button
    android:id="@+id/startanimation"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Start Animation" />
<Button
    android:id="@+id/stopanimation"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Stop Animation" />
<ImageView
    android:id="@+id/myanimation"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:src="@anim/anim_android"
    />

</LinearLayout>



Download the files.


next:
- Set alpha of AnimationDrawable
Detect AnimationDrawable.isRunning() to toggle start/stop animation

2 comments:

martin seal said...

hi how would you achieve the same effect using one button

Andr.oid Eric said...

hello martin seal,

read HERE.