【Android学习笔记】Android播放音乐示例代码

最新推荐文章于 2025-04-20 00:15:00 发布

wangxiaojingo

最新推荐文章于 2025-04-20 00:15:00 发布

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分类专栏： Android 文章标签： android mediaplayer SoundPool

本文链接：https://blog.youkuaiyun.com/wangxiaojingo/article/details/24601551

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1.MediaPlayer类,适合播放背景音乐

有两种创建MediaPlayer的方式

①

MediaPlayer mediaPlayer=MediaPlayer.create(getApplicationContext(), R.raw.gameback);

②

MediaPlayer mediaPlayer=new MediaPlayer();

mediaPlayer.setDataSource("/mnt/sdcard/1.mp3");

//获取sd卡中文件的路径可以String path=new File(Environment.getExternalStorageDirectory(),"1.mp3").getAbsolutePath();

mediaPlayer.prepare();//进行数据的缓冲

播放，需要给mediaPlayer添加一个OnPreparedListener的监听:

class="java">mediaPlayer.setOnPreparedListener(new myPreparedListener());

private final class myPreparedListener implements OnPreparedListener{


@Override
public void onPrepared(MediaPlayer mp) {
mediaPlayer.start();//开始播放
}
		
}

暂停

if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();//暂停
}

重新播放,指定从某点开始播放

if (mediaPlayer.isPlaying()) {
mediaPlayer.seekTo(0);//由时间刻度来定义,这里的0代表从头开始播放
}

得到当前播放进度

int position=mediaPlayer.getCurrentPosition();

停止

if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();//停止
}

释放资源

mediaPlayer.release();
mediaPlayer=null;

2.SoundPool类,适合播放短的音效，大小要小于1M，比如射击的声音等等

例子:

public class MainActivity extends Activity {

	private MediaPlayer mediaPlayer;
	private SoundPool soundpool;
	private int sound_id;
	private AudioManager audiomanager;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_main);
	}
	
	//Button--android:onClick="play"
	public void play(View v){
	soundpool=new SoundPool(3, AudioManager.STREAM_MUSIC, 0);
		sound_id=soundpool.load(getApplicationContext(), R.raw.dong, 1);
		soundpool.setOnLoadCompleteListener(new myOnLoadCompleteListener());
		audiomanager=(AudioManager)this.getSystemService(AUDIO_SERVICE);
	}
	
	//监听SoundPool加载完成
	private final class myOnLoadCompleteListener implements OnLoadCompleteListener{
		@Override
		public void onLoadComplete(SoundPool soundPool, int sampleId, int status) {
		float streamVolumeCurrent = audiomanager.getStreamVolume(AudioManager.STREAM_MUSIC);   
	float streamVolumeMax = audiomanager.getStreamMaxVolume(AudioManager.STREAM_MUSIC);       
	float volume = streamVolumeCurrent / streamVolumeMax; 
			
        soundpool.play(sound_id, volume, volume, 1, 0, 1);
		}

	}

}