1. 创建一个SoundPool
创建一个SoundPool对象:new SoundPool(int maxStreams, int streamType, int srcQuality);
public SoundPool(int maxStream, int streamType, int srcQuality)
maxStream —— 同时播放的流的最大数量
streamType —— 流的类型,一般为STREAM_MUSIC(具体在AudioManager类中列出)
srcQuality —— 采样率转化质量,当前无效果,使用0作为默认值
eg.
SoundPool soundPool = new SoundPool(3, AudioManager.STREAM_MUSIC, 0);
创建了一个最多支持3个流同时播放的,类型标记为音乐的SoundPool。
2、 从资源或者文件载入音频流: load(Context context, int resId, int priority);
soundpool的加载:
int load(Context context, int resId, int priority) //从APK资源载入
int load(FileDescriptor fd, long offset, long length, int priority) //从FileDescriptor对象载入
int load(AssetFileDescriptor afd, int priority) //从Asset对象载入
int load(String path, int priority) //从完整文件路径名载入
最后一个参数为优先级。
一般把多个声音放到HashMap中去,比如
soundPool = new SoundPool(4, AudioManager.STREAM_MUSIC, 100);
soundPoolMap = new HashMap<Integer, Integer>();
soundPoolMap.put(1, soundPool.load(this, R.raw.dingdong, 1));
3、 播放声音play (int soundID, float leftVolume, float rightVolume, int priority, int loop, float rate);
play(int soundID, float leftVolume, float rightVolume, int priority, int loop, float rate) ,
其中leftVolume和rightVolume表示左右音量,
priority表示优先级,
loop表示循环次数,
rate表示速率,如 //速率最低0.5最高为2,1代表正常速度
sp.play(soundId, 1, 1, 0, 0, 1);
而停止则可以使用 pause(int streamID) 方法,这里的streamID和soundID均在构造SoundPool类的
第一个参数中指明了总数量,而id从0开始。
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context=".MainActivity" > <TextView android:id="@+id/textView1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="@string/hello_world" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_below="@+id/textView1" android:text="播放音效1" /> <Button android:id="@+id/button2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/textView1" android:layout_below="@+id/button1" android:text="播放音效2" /> <Button android:id="@+id/button3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button2" android:layout_below="@+id/button2" android:text="暂停音效1" /> <Button android:id="@+id/button4" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/button3" android:layout_below="@+id/button3" android:text="暂停音效2" /> </RelativeLayout>
package com.example.android_sample_3_1; import java.util.HashMap; import android.media.AudioManager; import android.media.SoundPool; import android.os.Bundle; import android.provider.MediaStore.Audio; import android.app.Activity; import android.view.Menu; import android.view.View; import android.widget.Button; import android.widget.Toast; public class MainActivity extends Activity { SoundPool sp; HashMap<Integer, Integer> spMap; Button b1; Button b1Pause; Button b2; Button b2Pause; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initSoundPool(); b1 = (Button) findViewById(R.id.button1); b1Pause = (Button) findViewById(R.id.button3); b2 = (Button) findViewById(R.id.button2); b2Pause = (Button) findViewById(R.id.button4); b1.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { palySound(1, 1); Toast.makeText(MainActivity.this, "播放音效1", Toast.LENGTH_SHORT).show(); } }); b1Pause.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { sp.pause(spMap.get(1)); Toast.makeText(MainActivity.this, "暂停音效1", Toast.LENGTH_SHORT).show(); } }); b2.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { palySound(2, 1); Toast.makeText(MainActivity.this, "播放音效2", Toast.LENGTH_SHORT).show(); } }); b2Pause.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { sp.pause(spMap.get(2)); Toast.makeText(MainActivity.this, "暂停音效2", Toast.LENGTH_SHORT).show(); } }); } private void palySound(int sound, int number) { AudioManager am = (AudioManager) this.getSystemService(this.AUDIO_SERVICE); float audioMaxVolumn = am.getStreamMaxVolume(AudioManager.STREAM_MUSIC); float audioCurrentVolumn = am.getStreamVolume(AudioManager.STREAM_MUSIC); float volumnRatio = audioCurrentVolumn / audioMaxVolumn; sp.play(spMap.get(sound), volumnRatio, volumnRatio, 1, number, 1); } private void initSoundPool() { sp = new SoundPool(5, AudioManager.STREAM_MUSIC, 0); spMap = new HashMap<Integer, Integer>(); spMap.put(1, sp.load(this, R.raw.attack02, 1)); spMap.put(2, sp.load(this, R.raw.attack14, 1)); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } }