android - 使用 soundpool 示例播放声音

Question

我想学习如何使用soundpool方法。我希望您向我展示一个运行 2 种声音的非常简单的示例。

Answer 1

在your_app/res/. _ _ 然后将您的铃声粘贴到此文件夹中，例如your_app/res/raw/ringtone.mp3. 现在使用以下代码：

SoundPool soundPool = new SoundPool(5, AudioManager.STREAM_MUSIC, 0);
int soundId = soundPool.load(context, R.raw.ringtone, 1);
// soundId for reuse later on

soundPool.play(soundId, 1, 1, 0, 0, 1);

使用后一定要释放 SoundPool 资源：

soundPool.release();
soundPool = null;

Answer 2

是的。我也经历过。但为了安全起见，我保存了一段我在网上找到的代码。虽然没有用过，但我知道它很快就会派上用场......

1）您需要创建 AudioAttributes 对象：

AudioAttributes attributes = new AudioAttributes.Builder()
    .setUsage(AudioAttributes.USAGE_GAME)
    .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
    .build();

2) 创建 SoundPool 对象：

SoundPool sounds = new SoundPool.Builder()
    .setAudioAttributes(attributes)
    .build();

3) 如何在所有 API 级别上使用 SoundPool 示例：

SoundPool sound;

protected void createSoundPool() {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        createNewSoundPool();
    } else {
        createOldSoundPool();
    }
}

@TargetApi(Build.VERSION_CODES.LOLLIPOP)
protected void createNewSoundPool(){
    AudioAttributes attributes = new AudioAttributes.Builder()
        .setUsage(AudioAttributes.USAGE_GAME)
        .setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION)
        .build();
    sounds = new SoundPool.Builder()
        .setAudioAttributes(attributes)
        .build();
}

@SuppressWarnings("deprecation")
protected void createOldSoundPool(){
    sounds = new SoundPool(5,AudioManager.STREAM_MUSIC,0);
}

Answer 3

这是一个小的工作示例soundPool，取自此处并稍作修改以匹配 post 21 API。

需要注意的一件事是maxStreams，它表示允许并行运行多少个流，如果是一个（默认），则可以从构建器中删除它。

import android.app.Activity;
import android.content.Context;
import android.media.AudioManager;
import android.media.SoundPool;

public class SoundManager extends Activity
{
  static SoundPool soundPool;
  static int[] sm;

  public static void InitSound() {

    int maxStreams = 1;
    Context mContext = getApplicationContext();
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
        soundPool = new SoundPool.Builder()
                .setMaxStreams(maxStreams)
                .build();
    } else {
        soundPool = new SoundPool(maxStreams, AudioManager.STREAM_MUSIC, 0);
    }

    sm = new int[3];
    // fill your sounds
    sm[0] = soundPool.load(mContext, R.raw.sound_1, 1);
    sm[1] = soundPool.load(mContext, R.raw.sound_2, 1);
    sm[2] = soundPool.load(mContext, R.raw.sound_3, 1);

  }

  static void playSound(int sound) {

      soundPool.play(sm[sound], 1, 1, 1, 0, 1f);
  }

   public final void cleanUpIfEnd() {
    sm = null;
    soundPool.release();
    soundPool = null;
  } 
}

Answer 4

我编写了一个 SoundPoolManager，可用于加载声音文件并在需要时播放。你可以在这里看到它。

谢谢。

Answer 5

private final int NUMBER_OF_SIMULTANEOUS_SOUNDS = 5;
        private final float LEFT_VOLUME_VALUE = 1.0f;
        private final float RIGHT_VOLUME_VALUE = 1.0f;
        private final int MUSIC_LOOP = 0;
        private final int SOUND_PLAY_PRIORITY = 0;
        private final float PLAY_RATE= 1.0f;


        SoundPool soundPool;

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            soundPool= new SoundPool.Builder()
                    .setMaxStreams(NUMBER_OF_SIMULTANEOUS_SOUNDS)
                    .build();
        } else {
            // Deprecated way of creating a SoundPool before Android API 21.
            soundPool= new SoundPool(NUMBER_OF_SIMULTANEOUS_SOUNDS, AudioManager.STREAM_MUSIC, 0);
        }
        int soundId = soundPool.load(getApplicationContext(), R.raw.sound_1, 1);

        soundPool.play(soundId , LEFT_VOLUME_VALUE , RIGHT_VOLUME_VALUE, SOUND_PLAY_PRIORITY , MUSIC_LOOP ,PLAY_RATE);