Android多媒体功能开发-使用SoundPool播放音频的例子

package com.zzk.a1503soundpool; import androidx.appcompat.app.AppCompatActivity; import android.media.AudioManager; import android.media.SoundPool; import android.os.Bundle; import android.view.View; import android.widget.*; public class MainActivity extends AppCompatActivity { int[] soundResId = {R.raw.fly, R.raw.fire, R.raw.explode}; // 音频资源 SoundPool soundPool; int[] soundId; // soundPool为每个装入的音频资源生成的SoundID int flyStreamId; // soundPool播放fly音频时使用的Channel，通过Channel控制音效播放 PlayThread playThread; // 因为SoundPool的循环播放功能无效，所以用Thread来实现循环播放 @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); LinearLayout ll = new LinearLayout(this); ll.setOrientation(LinearLayout.VERTICAL); setContentView(ll); soundId = new int[soundResId.length]; soundPool = new SoundPool(3, AudioManager.STREAM_MUSIC, 100); // 创建SoundPool对象 for(int i=0; i<soundResId.length; i++) soundId[i] = soundPool.load(this, soundResId[i], 1); // 依次载入音频资源，生成的SoundID存入soundId数组，播放时使用 Button btnFire = new Button(this); btnFire.setText("Fire"); ll.addView(btnFire); btnFire.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View arg0) { soundPool.play(soundId[1], 1, 1, 1, 0, 1); // 播放fire音频，其SoundID存放在soundId[1] } }); Button btnExplode = new Button(this); btnExplode.setText("Explode"); ll.addView(btnExplode); btnExplode.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View arg0) { soundPool.play(soundId[2], 1, 1, 1, 0, 1); // 播放explode音频，其SoundID存放在soundId[2] } }); Button btnStartFly = new Button(this); btnStartFly.setText("Start Fly"); ll.addView(btnStartFly); btnStartFly.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View arg0) { flyStreamId = soundPool.play(soundId[0], 1, 1, 1, -1, 1f); // 控制循环播放的参数无效 //playThread = new PlayThread(soundId[0], 3000); // 启用一个线程，每隔3000毫秒播放一次fly音频，其长度大约为3000毫秒 //playThread.start(); } }); Button btnStopFly = new Button(this); btnStopFly.setText("Stop Fly"); ll.addView(btnStopFly); btnStopFly.setOnClickListener(new View.OnClickListener(){ @Override public void onClick(View arg0) { soundPool.stop(flyStreamId); //playThread.stopPlay(); } }); } @Override protected void onDestroy(){ super.onDestroy(); soundPool.release(); } class PlayThread extends Thread { boolean flag; int soundId; int streamId; int duration; public PlayThread(int sId, int d){ soundId = sId; duration = d; } public void run(){ flag = true; while(flag){ streamId = soundPool.play(soundId, 1, 1, 1, 0, 1f); // 播放音频soundId try { sleep(duration); // 等待该音频的播放时间 } catch (InterruptedException e) { e.printStackTrace(); } } } public void stopPlay(){ soundPool.stop(streamId); // 立即停止SoundPool的streamId频道的播放 flag = false; // 停止播放循环 } } }