Android动画之逐帧动画

Frame Animation

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.animation.frameanimation.MainActivity">

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="开始"
android:id="@+id/btn_start"
android:layout_alignParentTop="true"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"/>

<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="结束"
android:id="@+id/btn_stop"
android:layout_alignParentTop="true"
android:layout_alignParentRight="true"
android:layout_alignParentEnd="true"/>

<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/iv_anim"
android:layout_below="@+id/btn_start"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_alignParentBottom="true"
android:layout_alignRight="@+id/btn_stop"
android:layout_alignEnd="@+id/btn_stop"/>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
android:oneshot="false">
<item android:drawable="@drawable/girl_1" android:duration="100"/>
<item android:drawable="@drawable/girl_2" android:duration="100"/>
<item android:drawable="@drawable/girl_3" android:duration="100"/>
<item android:drawable="@drawable/girl_4" android:duration="100"/>
<item android:drawable="@drawable/girl_5" android:duration="100"/>
<item android:drawable="@drawable/girl_6" android:duration="100"/>
<item android:drawable="@drawable/girl_7" android:duration="100"/>
<item android:drawable="@drawable/girl_8" android:duration="100"/>
<item android:drawable="@drawable/girl_9" android:duration="100"/>
<item android:drawable="@drawable/girl_10" android:duration="100"/>
<item android:drawable="@drawable/girl_11" android:duration="100"/>

</animation-list>

package com.example.animation.frameanimation;

import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.animation.Animation;
import android.widget.Button;
import android.widget.ImageView;

public class MainActivity extends AppCompatActivity {
Button button;
Button button2;
ImageView imageView;
AnimationDrawable animation;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.btn_start);
button2 = (Button) findViewById(R.id.btn_stop);
imageView = (ImageView) findViewById(R.id.iv_anim);

imageView.setBackgroundResource(R.drawable.fat_po);//这里应该调用setBackgroundResource()方法，而不是setImageResource(),否则下面imageView.getBackground()会报空。

animation = (AnimationDrawable)imageView.getBackground();
button.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
animation.start();
}
});
button2.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
animation.stop();
}
});
}
}