Android逐帧动画实现代码

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android"
 android:oneshot="false">
 <item
 android:drawable="@mipmap/sample_1"
 android:duration="100" />
 <item
 android:drawable="@mipmap/sample_2"
 android:duration="100" />
 <item
 android:drawable="@mipmap/sample_3"
 android:duration="100" />
 <item
 android:drawable="@mipmap/sample_4"
 android:duration="100" />
 <item
 android:drawable="@mipmap/sample_5"
 android:duration="100" />
 <item
 android:drawable="@mipmap/sample_6"
 android:duration="100" />
</animation-list>

 <ImageView
 android:id="@+id/iv_ani"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"
 android:src="@drawable/sample_animlist" />

public class MainActivity extends AppCompatActivity {

 private ImageView iv_ani;
 private AnimationDrawable mAnimationDrawable;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 iv_ani = (ImageView) findViewById(R.id.iv_ani);
 mAnimationDrawable = (AnimationDrawable) iv_ani.getDrawable();
 }

 @Override
 public void onWindowFocusChanged(boolean hasFocus) {
 super.onWindowFocusChanged(hasFocus);
 //window初始化完毕 开始播放动画
 animationStart();
 }

 @Override
 protected void onPause() {
 animationStop();
 super.onPause();
 }

 private void animationStart() {
 if (null != mAnimationDrawable)
  mAnimationDrawable.start();//开始播放
 }

 private void animationStop() {
 if (null != mAnimationDrawable)
  mAnimationDrawable.stop();//暂停播放
 }
}

public class MainActivity extends AppCompatActivity {

 private ImageView iv_ani;
 private AnimationDrawable mAnimationDrawable;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);
 iv_ani = (ImageView) findViewById(R.id.iv_ani);
 initAnimationDrawable();
 }

 private void initAnimationDrawable(){
 mAnimationDrawable = new AnimationDrawable();
 for (int i = 1; i <= 4; i++) {
  int id = getResources().getIdentifier("sample_" + i, "mipmap", getPackageName());
  Drawable drawable = getResources().getDrawable(id);
  mAnimationDrawable.addFrame(drawable, 100);
 }
 mAnimationDrawable.setOneShot(false);
 iv_ani.setImageDrawable(mAnimationDrawable);

 }
}