Android 音频播放

android音频播放方式有两种:一种是MediaPlayer，另一种是SoundPool，下面这个例子是用的第一种

1.首先看布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><TextView      android:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="音乐文件名称"    /><EditTextandroid:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="neyanbhbin.mp3"    android:id="@+id/fileName"/><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="wrap_content"><Buttonandroid:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="播放"    android:id="@+id/startButton"/><Buttonandroid:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="暂停"    android:layout_toRightOf="@id/startButton"    android:layout_alignTop="@id/startButton"    android:id="@+id/pauseButton"/><Buttonandroid:layout_width="wrap_content"     android:layout_height="wrap_content"     android:text="停止"       android:layout_toRightOf="@+id/pauseButton"    android:layout_alignTop="@+id/pauseButton"    android:id="@+id/endButton"/></RelativeLayout></LinearLayout>

2.响应的Activity代码如下

package com.lamp.audio;import android.app.Activity;import android.media.AudioManager;import android.media.MediaPlayer;import android.media.MediaPlayer.OnCompletionListener;import android.os.Bundle;import android.util.Log;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class Audio extends Activity {private EditText fileNameText = null;private MediaPlayer mediaPlayer = null;private boolean ispause = false;private static final String TAG = "Audio";    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                fileNameText = (EditText)this.findViewById(R.id.fileName);        Button startButton = (Button)this.findViewById(R.id.startButton);        Button pauseButton = (Button)this.findViewById(R.id.pauseButton);        Button endButton = (Button)this.findViewById(R.id.endButton);        startButton.setOnClickListener(listener);        pauseButton.setOnClickListener(listener);        endButton.setOnClickListener(listener);        mediaPlayer = new MediaPlayer();        mediaPlayer.setOnCompletionListener(new OnCompletionListener() {public void onCompletion(MediaPlayer mp) {Toast.makeText(Audio.this, "播放结束", Toast.LENGTH_LONG).show();}});    }    private View.OnClickListener listener = new View.OnClickListener() {public void onClick(View v) {Button button = (Button)v;switch (button.getId()) {case R.id.startButton:String fileName = fileNameText.getText().toString();mediaPlayer.reset();mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);try {mediaPlayer.setDataSource("/mnt/sdcard/" + fileName);//缓冲mediaPlayer.prepare();//开始播放mediaPlayer.start();} catch (Exception e) {Log.e(TAG, e.toString());} break;case R.id.pauseButton:if(mediaPlayer.isPlaying()){//暂停播放mediaPlayer.pause();}else{mediaPlayer.start();}break;case R.id.endButton:if(mediaPlayer.isPlaying()){//停止播放mediaPlayer.stop();}break;}}};//当手机收到外来响应，比如接到电话，音频播放暂停protected void onPause() {if(mediaPlayer.isPlaying()){mediaPlayer.pause();ispause = true;}super.onPause();}//当挂断电话后恢复播放protected void onResume() {if(ispause){mediaPlayer.start();ispause = false;}super.onResume();}@Overrideprotected void onDestroy() {mediaPlayer.release();mediaPlayer = null;super.onDestroy();}}

播放的map3文件可以放在资源文件夹，sdk卡，此例子是放在sdk根目录下

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