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使用此代碼我想播放聲音。我把它Android MediaPlayer運行時錯誤
public class MainActivity extends Activity
{
private MediaPlayer cPiano;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(new GameView(this));
}
public void playSound(){
cPiano = MediaPlayer.create(this, R.raw.cpiano);
cPiano.start();
}
}
public class GameView extends SurfaceView
{
private SurfaceHolder surfaceHolder;
private MainActivity mainActivity
public GameView(Context context)
{
super(context);
mainActivity = new MainActivity();
}
@Override
protected void onDraw(Canvas canvas)
{
for (Pixel pixel : pixelList)
{
pixel.onDraw(canvas);
}
for (int i = pixelList.size() - 1; i >= 0; i--)
{
Pixel pixel = pixelList.get(i);
if (pixel.isBar())
{
mainActivity.playSound();
removePixel(i);
break;
}
}
}
這僅僅是最重要的代碼playSound()方法。但是,當它應該播放聲音我得到一個Android運行時錯誤
什麼是錯的?
刪除這個'mainActivity = new MainActivity()'你可以在gameview中啓動你的媒體播放器,因爲你有活動上下文。 – Raghunandan
好的,但我仍然得到錯誤。 LogCat說onDraw()會出問題 – Stupe