Frame动画java

package frame.yb;

import android.content.Context;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.Drawable;
import android.view.KeyEvent;
import android.view.View;

/**
 * @author yubin
 * @version 2012-8-21 下午03:01:24
 **/
public class GameView extends View {
    // 定义AnimationDrawable
    private AnimationDrawable mAnimationDrawable = null;
    // 定义一个Drawable
    Drawable mDrawable = null;
    Context context;

    public GameView(Context context) {
        super(context);
        this.context = context;
        // 实例化AnimationDrawable
        mAnimationDrawable = new AnimationDrawable();
        // 装载资源
        for(int i = 1; i < 16; i++) {
            int id = getResources().getIdentifier("a" + i, "drawable",
                    this.context.getPackageName());
            mDrawable = getResources().getDrawable(id);
            // 第一个参数是mDrawable显示的图片,第二个参数是显示时间 毫秒为单位
            mAnimationDrawable.addFrame(mDrawable, 500);
        }
        // 是否循环 false 循环 true 不循环
        mAnimationDrawable.setOneShot(false);
        // 设置本类将要显示这个动画
        this.setBackgroundDrawable(mAnimationDrawable);
        setFocusable(true);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if(keyCode == KeyEvent.KEYCODE_DPAD_UP) {
            // 开始播放动画
            mAnimationDrawable.start();
        }
        return super.onKeyDown(keyCode, event);
    }
}