Android显示GIF动画完整示例(二)

MainActivity如下:

package cc.testgif2;

import android.os.Bundle;
import android.app.Activity;
/**
 * Demo描述:
 * 利用自定义View控件显示GIF动画
 * 详细代码参见GIFView
 * 
 * 参考资料:
 * http://blog.csdn.net/dawanganban/article/details/9816083
 * Thank you very much
 */
public class MainActivity extends Activity {

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

GIFView如下:

package cc.testgif2;

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

public class GIFView extends View {
    private Movie mMovie;
    private long startTime;
    private  int gifDuration;
    private boolean isBeginPlay=true;
public GIFView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}

public GIFView(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}

public GIFView(Context context) {
super(context);
init();
}

private void init(){
mMovie = Movie.decodeStream(getResources().openRawResource(R.drawable.gif));
gifDuration= mMovie.duration();
}

@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
// 从开机到现在的毫秒(不包括手机睡眠的时间在内)
long currrentTime = android.os.SystemClock.uptimeMillis();
// 第一次播放
if (isBeginPlay) {
startTime = currrentTime;
isBeginPlay = false;
}

int playTime = (int) ((currrentTime - startTime) % gifDuration);
mMovie.setTime(playTime);
mMovie.draw(canvas, 0, 0);
// 重绘
invalidate();
}

}

main.xml如下:

<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"
  >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" 
        android:layout_centerHorizontal="true"/>
    
    <cc.testgif2.GIFView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true"
    />

</RelativeLayout>

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