Android动画之逐帧动画(Frame Animation)基础学习

<?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/a" android:duration="100"/>
 <item android:drawable="@drawable/b" android:duration="100"/>
 <item android:drawable="@drawable/c" android:duration="100"/>
</animation-list>

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

 <Button
 android:id="@+id/btn_start"
 android:text="开始跳舞"
 android:textSize="25sp"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"/>
 <Button
 android:id="@+id/btn_stop"
 android:text="结束跳舞"
 android:textSize="25sp"
 android:layout_width="wrap_content"
 android:layout_height="wrap_content"/>

 <ImageView
 android:id="@+id/image"
 android:background="@drawable/anim_frame"
 android:layout_width="match_parent"
 android:layout_height="match_parent"/>
</LinearLayout>

package com.lyp.frameanim;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener{
 private Button mBtnStart;
 private Button mBtnStop;
 private ImageView mImage;
 private AnimationDrawable mAnim;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);
 setContentView(R.layout.activity_main);

// new AnimationDrawable().addFrame(getDrawable(R.drawable.a),200);

 initView();
 mAnim = (AnimationDrawable) mImage.getBackground();
 }

 private void initView() {
 mBtnStart= (Button) findViewById(R.id.btn_start);
 mBtnStop= (Button) findViewById(R.id.btn_stop);
 mImage= (ImageView) findViewById(R.id.image);

 mBtnStart.setOnClickListener(this);
 mBtnStop.setOnClickListener(this);
 }

 @Override
 public void onClick(View v) {
 switch (v.getId()){
  case R.id.btn_start:
  mAnim.start();
  break;
  case R.id.btn_stop:
  mAnim.stop();
  break;
 }
 }
}