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;  }}