在一个简单的游戏中播放Android背景音乐

Question

我试着用Services在安卓上玩简单游戏中的背景音乐。

使用链接：Android Life Cycles

但是这段代码不能正常工作，onResumeActivity, onPauseActivity被调用，但是即使在调用onPauseActivity方法时，音乐仍然在后台运行。

当应用程序处于后台时，音乐继续播放。

在Android应用程序/游戏中还有其他播放背景音乐的方法吗？

Answer 1

public class SoundGameBaseActivity extends Activity {
public static boolean isSoundPaused = false;





public static MediaPlayer mp;

protected static final String TAG = SoundGameBaseActivity.class.getName();

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);


    playMusic();
}

public static boolean isAppWentToBg = false;

public static boolean isWindowFocused = false;

public static boolean isMenuOpened = false;

public static boolean isBackPressed = false;

@Override
protected void onStart() {
    Log.d(TAG, "onStart isAppWentToBg " + isAppWentToBg);

    applicationWillEnterForeground();

    super.onStart();
}

private void applicationWillEnterForeground() {
    if (isAppWentToBg) {
        //Google Analytics
        MyApp.getInstance().trackScreenView("ApplicationActivated");
        isAppWentToBg = false;
    //  Toast.makeText(getApplicationContext(), "App is in foreground",
    //          Toast.LENGTH_SHORT).show();
        playMusic();
    }
}

@Override
protected void onStop() {
    super.onStop();

    Log.d(TAG, "onStop ");


        applicationdidenterbackground();


}

public void applicationdidenterbackground() {

    if (!isWindowFocused) {

        isAppWentToBg = true;
        Toast.makeText(getApplicationContext(),
                "App is Going to Background", Toast.LENGTH_SHORT).show();

        stopMusic();

    }
}

public void TurnOnMusicAgain() {

}

void playMusic() {





        if (mp == null) {
            mp = MediaPlayer.create(this, R.raw.background1);
            // mp.prepare();
            mp.start();
            mp.setLooping(true);

        } else {
            if (mp.isPlaying()) {

            } else {
                Log.e("", "coming back");
                mp.start();
            }
        }

}

void stopMusic() {
    if (mp != null)

        mp.pause();
}

@Override
public void onBackPressed() {

    if (this instanceof StartScreen) {

    } else {
        isBackPressed = true;
    }

    Log.d(TAG,
            "onBackPressed " + isBackPressed + ""
                    + this.getLocalClassName());
    super.onBackPressed();
}

@Override
public void onWindowFocusChanged(boolean hasFocus) {

    isWindowFocused = hasFocus;
    Log.e("Is Window Focus", "" + isWindowFocused);
    if (isBackPressed && !hasFocus) {
        isBackPressed = false;
        isWindowFocused = true;
    }

    super.onWindowFocusChanged(hasFocus);
}

}

Answer 2

我想这个密码对你有用。添加这个类(包含在活动类中)。

public class BackgroundMusic extends AsyncTask<Void, Void, Void> {

    @Override
    protected Void doInBackground(Void... params) {
        MediaPlayer backgroundmusic = MediaPlayer.create(YourActivity.this, R.raw.yourbackgroundmusic); 
        player.setVolume(100,100); 
        player.setLooping(true); 
        player.start(); 

        return null;
    }

}

并创造它

BackgroundMusic bm = new BackgroundMusic();

关于onResume方法：

public void onResume() {
    super.onResume();
    bm.execute(null);
}

和onPause方法：

public void onPause() {
    super.onPause();
    bm.cancel(true);
}

希望能帮上忙！