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);
    }
}