Android DrawBitmap绘制图像

import android.app.Activity;import android.os.Bundle;import android.util.DisplayMetrics;import android.view.KeyEvent;public class Test_DrawBitmap extends Activity {    /** Called when the activity is first created. */private GameView gv = null;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        DisplayMetrics dm = new DisplayMetrics();        this.getWindowManager().getDefaultDisplay().getMetrics(dm);                gv = new GameView(this,dm.widthPixels,dm.heightPixels);        setContentView(gv);    }@Overridepublic boolean onKeyDown(int keyCode, KeyEvent event) {return gv.onKeyDown(keyCode, event);}    }