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当我的应用程序中播放音乐时，我试图让背景闪烁，但它没有按预期工作。

按下按钮时播放音乐。音乐关闭时背景应为黄色，但在播放音乐时背景应在黄色和紫色之间快速闪烁。

此刻关闭时为黄色，播放音乐时变为暗灰色，关闭音乐时不返回黄色。

public class InstaRave extends Activity {

private static final String TAG = "InstaRave";
private static int isPlaying = 0; // 0 is not playing 1 is playing
private MediaPlayer mp;
public static int mPurple = color.mPurple;
public static int mYellow = color.mYellow;
public static int currentBackground = mYellow;

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


    final Button play_button = (Button)this.findViewById(R.id.raveButton);
    final RelativeLayout mRelativeLayout = (RelativeLayout) this.findViewById(R.id.topLevelLayout);

    mp = MediaPlayer.create(this, R.raw.rave_mk);

    Log.v(TAG, "Initializing sounds...");

    play_button.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            switch (isPlaying){
                case 0:
                    changeBackground(mRelativeLayout);
                    startMusic();
                    isPlaying = 1;
                    rave();
                    break;
                case 1:
                    changeBackground(mRelativeLayout);
                    stopMusic();
                    isPlaying = 0;
                    rave();
                    break;
                default:
                    Log.e(TAG, "Ooops something went wrong");
            }
        }

        private void stopMusic(){
            Log.v(TAG, "Stopping sound...");
            mp.stop();
            //isPlaying = 0;
            mp.prepareAsync();
        }

        private void startMusic(){
            Log.v(TAG, "Playing sound...");
            mp.start();
            //isPlaying = 1;
        }

        private void rave(){
            Log.v(TAG, String.valueOf(isPlaying));
            if (isPlaying == 1){
                Log.v(TAG, "Raving....");
                new Rave().execute();
            } else {
                Log.v(TAG, "End the rave the po po is here...");
            }
        }

    });
}

protected void onPause(){
    super.onPause();
    mp.release();
    mp = null;
}

private void changeBackground(RelativeLayout mRelativeLayout){
    if (currentBackground == mYellow){
        currentBackground = mPurple;
        mRelativeLayout.setBackgroundColor(currentBackground);
        Log.v(TAG, "Background is: " + String.valueOf(currentBackground));
    }
    currentBackground = mYellow;
    mRelativeLayout.setBackgroundColor(currentBackground);
    Log.v(TAG, "Background is: " + String.valueOf(currentBackground));
}

private class Rave extends AsyncTask<Void, Void, Void> {
    final RelativeLayout mRelativeLayout = (RelativeLayout) findViewById(R.id.topLevelLayout);

    @Override
    protected Void doInBackground(Void... params) {
        while (isPlaying ==1){
            try {
                Thread.sleep(75);
                publishProgress();
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return null;
    }

    protected void onProgressUpdate(Void... progress){
        changeBackground(mRelativeLayout);
    }
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.insta_rave, menu);
    return true;
}

}

4

1 回答 1

1

将您的 changeBackground() 方法更改为：

private void changeBackground(RelativeLayout mRelativeLayout){
  if (currentBackground == mYellow){
      currentBackground = mPurple;
      mRelativeLayout.setBackgroundColor(currentBackground);
      Log.v(TAG, "Background is: " + String.valueOf(currentBackground));
  }
  else
  {
     currentBackground = mYellow;
     mRelativeLayout.setBackgroundColor(currentBackground);
     Log.v(TAG, "Background is: " + String.valueOf(currentBackground));
  }
}
于 2013-09-08T18:24:02.673 回答