android soundpool的使用 Android中SoundPool的使用步骤实例

 /**
   *SoundPool源码中的构造方法方法体
   * @param maxStreams 最多可以容纳多少个音频
   * @param streamType 指定的声音类型，通过AudioManager类提供的常量进行指定
   * @param srcQuality 指定音频的质量，默认为0
   * @return a SoundPool object, or null if creation failed
   */
  public SoundPool(int maxStreams, int streamType, int srcQuality)

/**
   * @param context the application context
   * @param resId the resource ID
   * @param priority the priority of the sound. Currently has no effect. Use
   *         a value of 1 for future compatibility.
   * @return a sound ID. This value can be used to play or unload the sound.
   */
 public int load(Context context, int resId, int priority);

 /**
   * Play a sound from a sound ID.
   * @param soundID 通过load方法返回的音频
   * @param leftVolume 左声道的音量
   * @param rightVolume 右声道的音量 
   * @param priority 优先级，值越大，优先级越高
   * @param loop 循环的次数：0为不循环，-1为循环
   * @param rate 指定速率，正常位1，为地位0.5，最高位2
   * @return non-zero streamID if successful, zero if failed
   */
  public final int play(int soundID, float leftVolume, float rightVolume,
      int priority, int loop, float rate)；

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:orientation="horizontal" >
  <Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="风铃声" />
  <Button
    android:id="@+id/button2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="布谷鸟叫声" />
  <Button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="门铃声" />
  <Button
    android:id="@+id/button4"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="电话声" />
</LinearLayout>

package com.mingrisoft;
import java.util.HashMap;
import android.app.Activity;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
  private SoundPool soundpool;  //声明一个SoundPool对象
  //使用HashMap管理各种音频
  private HashMap<Integer, Integer> soundmap = new HashMap<Integer, Integer>();  //创建一个HashMap对象
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button chimes = (Button) findViewById(R.id.button1);  //获取“风铃声”按钮
    Button enter = (Button) findViewById(R.id.button2);   //获取“布谷鸟叫声”按钮
    Button notify = (Button) findViewById(R.id.button3);  //获取“门铃声”按钮
    Button ringout = (Button) findViewById(R.id.button4);  //获取“电话声”按钮
    soundpool = new SoundPool(5,
        AudioManager.STREAM_SYSTEM, 0); //创建一个SoundPool对象，该对象可以容纳5个音频流
    //将要播放的音频流保存到HashMap对象中
    soundmap.put(1, soundpool.load(this, R.raw.chimes, 1));
    soundmap.put(2, soundpool.load(this, R.raw.enter, 1));
    soundmap.put(3, soundpool.load(this, R.raw.notify, 1));
    soundmap.put(4, soundpool.load(this, R.raw.ringout, 1));
    soundmap.put(5, soundpool.load(this, R.raw.ding, 1));
    //为各按钮添加单击事件监听器
    chimes.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        soundpool.play(soundmap.get(1), 1, 1, 0, 0, 1); //播放指定的音频
      }
    });
    enter.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        soundpool.play(soundmap.get(2), 1, 1, 0, 0, 1);//播放指定的音频
      }
    });
    notify.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        soundpool.play(soundmap.get(3), 1, 1, 0, 0, 1);//播放指定的音频
      }
    });
    ringout.setOnClickListener(new OnClickListener() {
      @Override
      public void onClick(View v) {
        soundpool.play(soundmap.get(4), 1, 1, 0, 0, 1);//播放指定的音频
        soundpool.play(soundpool.load(MainActivity.this, R.raw.notify, 1), 1, 1, 0, 0, 1);
      }
    });
  }
  //重写键被按下的事件
  @Override
  public boolean onKeyDown(int keyCode, KeyEvent event) {
    soundpool.play(soundmap.get(5), 1, 1, 0, 0, 1);   //播放按键音
    return true;
  }
}