2018-03-19 音乐播放器(三)----声音池

笔记如下

• 引出:在qq中,如果有10个好友同时给你发消息,连续的提示音,如果全部是按照之前的方法,会非常麻烦.
  MainActivity中

package com.chen.soundpool;

import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    private SoundPool pool;
    private int soundId;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //声音池
        //maxStreams:声音池中同时可以播放声音的数量
        //streamType:描述声音的类型
        //srcQuality:声音的质量设0就行了
        int maxStreams = 10;
        int streamType = AudioManager.STREAM_MUSIC;
        int srcQuality = 0;
        pool = new SoundPool(maxStreams,streamType,srcQuality);

        //加载一个声音文件
        soundId = pool.load(this, R.raw.shoot, 1);

    }

    public void shoot(View view){

/*   * @param soundID a soundID returned by the load() function
     * @param leftVolume left volume value (range = 0.0 to 1.0)
     * @param rightVolume right volume value (range = 0.0 to 1.0)
     * @param priority stream priority (0 = lowest priority)
     * @param loop loop mode (0 = no loop, -1 = loop forever)
     * @param rate playback rate (1.0 = normal playback, range 0.5 to 2.0)
     * @return non-zero streamID if successful, zero if failed*/
        //soundID:load()返回值
        //leftVolume:左声道
        //rightVolume:右声道
        //priority:优先级
        //loop:是否无限循环,0:不循环,1:无限循环
        //rate:播放的速率   range:0.5---2;

        pool.play(soundId,1f,1f,0,0,1);

    }

}