让ImageView可以使用gif的方法

在自己的包中添加MyGifView.java（直接复制，粘贴），读取gif资源在MyGifView中第20行读取：

MyGifView.java：

 package com.zzw.testgifuseimageview;

 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.Movie;
 import android.util.AttributeSet;
 import android.view.View;

 public class MyGifView extends View {

     private long movieStart;
     private Movie movie;

     // 重写该构造方法
     public MyGifView(Context context, AttributeSet attributeSet) {
         super(context, attributeSet);

         // 以文件流（InputStream）读取进gif图片资源
         movie = Movie.decodeStream(getResources().openRawResource(R.drawable.test));
     }

     @Override
     protected void onDraw(Canvas canvas) {

         long curTime = android.os.SystemClock.uptimeMillis();

         // 第一次播放
         if (movieStart == 0) {
             movieStart = curTime;
         }
         if (movie != null) {
             int duraction = movie.duration();
             int relTime = (int) ((curTime - movieStart) % duraction);
             movie.setTime(relTime);
             movie.draw(canvas, 0, 0);
             // 强制重绘
             invalidate();
         }

         super.onDraw(canvas);
     }
 }

把要放gif图片的ImageView的名字改为  包名.MyGifView

<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.zzw.testgifuseimageview.MainActivity" >

    <com.zzw.testgifuseimageview.MyGifView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_margin="20dp" />

</RelativeLayout>

MainActivity.java:

 package com.zzw.testgifuseimageview;

 import android.app.Activity;
 import android.os.Bundle;

 public class MainActivity extends Activity {

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