Frame动画

1.随便准备3张图片，放入drawable目录，也可以放在drawable-xxhpdi目录下。

2.在drawable目录下创建frame.xml文件，如下

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/bluetooth_break" android:duration="500"/>
    <item android:drawable="@drawable/bluetooth_scaning" android:duration="500"/>
    <item android:drawable="@drawable/button_bg" android:duration="500"/>
</animation-list>

3.activity_main.xml布局文件如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.idt.os.frameplay.MainActivity">
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/img_test"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click1"
        android:text="start"/>
    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:onClick="click2"
        android:text="stop"/>
</LinearLayout>

4.MainActivity.java文件如下

package com.idt.os.frameplay;

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

public class MainActivity extends AppCompatActivity {

    AnimationDrawable ad;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main); 
        ImageView imageView = (ImageView)findViewById(R.id.img_test);
        imageView.setBackgroundResource(R.drawable.frame);   //将动画布局图片设成ImageView背景
        ad = (AnimationDrawable) imageView.getBackground(); //获取动画Drawable
    }

    public void click1(View view) {
        ad.start();    //启动动画播放
    }

    public void click2(View view) {
        ad.stop();    //停止动画播放
    }
}

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