java - 使用SoundPool、Timer和TimerTask每分钟播放一次随机声音

Question

我试图每分钟播放一个随机声音，提示用户与设备交互。我正在使用 SoundPool、Timer 和 TimerTask 来尝试实现此目的。当播放声音时，我还使用 Logcat 来查看要播放的声音的 ID(这用于研究和数据分析目的)。我尝试了几种方法，包括在 TimerTask run() 方法内部和外部初始化 SoundPool，以及在单击按钮后释放 SoundPool。 timer.Schedule 用于安排 TimerTask 运行，我应该将它们设为静态吗？

logcat 正在记录 SoundId，但声音播放不一致。例如，它将播放第一个声音并记录，然后它将记录其他 SoundId，而不播放该声音。即使已按下按钮且已释放 SoundPool 的资源，也会发生这种情况。有时声音甚至根本不会播放。

任何人都可以告诉我为什么这会不一致或者更好的方法吗？

public class TouchscreenDashboard extends AppCompatActivity implements View.OnClickListener {

private SoundPool soundPool;
int[] sounds={R.raw.decrease_fan_speed_by_2, R.raw.decrease_fan_speed_by_5,
        R.raw.increase_fan_speed1, R.raw.increase_fan_speed_by_3,R.raw.lower_temp1,
        R.raw.lower_temp4, R.raw.raise_temp2, R.raw.raise_temp3 ,R.raw.skip_backwards_2_songs,
        R.raw.skip_backwards_4_songs,R.raw.skip_forward_1_song, R.raw.skip_forward_5_songs,
        R.raw.volume_down3,R.raw.volume_down6, R.raw.volume_up3, R.raw.volume_up5};

private Button volumeUp;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_2);
    Log.i("DashboardActivity", "Dashboard has started");

    Timer timer = new Timer() {};
    TimerTask timerTask = new TimerTask() {
        @Override
        public void run() {

            AudioAttributes audioAttributes = new AudioAttributes.Builder()
                    .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
                    .setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION)
                    .build();

            soundPool = new SoundPool.Builder()
                    .setAudioAttributes(audioAttributes)
                    .build();

            Random r = new Random();
            int Low = 0;
            int High = 16;
            int random = r.nextInt(High-Low) + Low;
            int soundId = soundPool.load(getApplicationContext(), sounds[random], 1);

            soundPool.play(soundId, 1, 1, 0, 0, 1);
            Log.i("DashboardActivity", "SoundId: " + random);
        }
    };
    timer.schedule(timerTask, 60000, 60000);

    volumeUp = findViewById(R.id.volumeUp);

}

@Override
public void onClick(View view) {
    switch (view.getId()) {
        case R.id.volumeUp:
            if (volumeCount < 99) {
                volumeCount++;
                volumeText.setText(Integer.toString(volumeCount));
            }
            soundPool.release();
            Log.i("DashboardActivity", "Volume Up Clicked");
            break;
        }
    }
}

Answer 1

所以，经过一番努力，我有了一个可行的解决方案!我仍然认为必须有更好的方法来做到这一点，但这就是我想出的方法。 setOnLoadCompleteListener 现在仅在加载后播放声音，并且timerTask2 比timerTask1 晚5 秒运行。延迟 5 秒的原因是我的声音长度都在 1-3 秒以下。

public class TouchscreenDashboard extends AppCompatActivity implements View.OnClickListener {

int[] sounds={R.raw.decrease_fan_speed_by_2, R.raw.decrease_fan_speed_by_5,
        R.raw.increase_fan_speed1, R.raw.increase_fan_speed_by_3,R.raw.lower_temp1,
        R.raw.lower_temp4, R.raw.raise_temp2, R.raw.raise_temp3 ,R.raw.skip_backwards_2_songs,
        R.raw.skip_backwards_4_songs,R.raw.skip_forward_1_song, R.raw.skip_forward_5_songs,
        R.raw.volume_down3,R.raw.volume_down6, R.raw.volume_up3, R.raw.volume_up5};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_2);
    Log.i("DashboardActivity", "Dashboard has started");

    startTimer();

}

public void startTimer() {
    timer = new Timer();
    timer2 = new Timer();
    initializeTimerTask();
    initializeTimerTask2();
    timer.schedule(timerTask, randomTimeInt, randomTimeInt); //
    timer2.schedule(timerTask2, randomTimeInt + 5000, randomTimeInt);
}

public void initializeTimerTask() {

    timerTask = new TimerTask() {
        @Override
        public void run() {

            audioAttributes = new AudioAttributes.Builder()
                    .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
                    .setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION)
                    .build();
            soundPool = new SoundPool.Builder()
                    .setAudioAttributes(audioAttributes)
                    .build();

            releaseSoundpool = true;
            Random r = new Random();
            int Low = 0;
            int High = 16;
            int random = r.nextInt(High-Low) + Low;
            final int soundId = soundPool.load(getApplicationContext(), sounds[random], 1);
            soundPool.setOnLoadCompleteListener(new SoundPool.OnLoadCompleteListener() {
                @Override
                public void onLoadComplete(SoundPool soundPool, int sampleId, int status) {
                    soundPool.play(soundId, 1, 1, 1, 0, 1);
                }
            });
            Log.d("TouchscreenDashboard", "soundID played: " + random);
        }
    };
}

public void initializeTimerTask2() {

    timerTask2 = new TimerTask() {
        @Override
        public void run() {
            soundPool.release();
            Log.d("TouchscreenDashboard", "SoundPool released");
        }
    };
}

我真的希望这对其他人有帮助。