01.Android之多媒体--使用MediaPlayer播放音频02

<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" >

<TableLayout android:layout_width="match_parent"
android:layout_height="wrap_content">

<TableRow android:gravity="center_horizontal" >
<Button android:id="@+id/button01"
android:layout_width="match_parent"
android:text="播放应用的资源文件（res/raw/）"/>
</TableRow>

<TableRow android:gravity="center_horizontal" >
<Button android:id="@+id/button02"
android:layout_width="match_parent"
android:text="播放应用的原始资源文件（assets）"/>
</TableRow>

<TableRow android:gravity="center_horizontal" >
<Button android:id="@+id/button03"
android:layout_width="match_parent"
android:text="播放外部存储器上的资源文件（sdcard）"/>
</TableRow>

<TableRow android:gravity="center_horizontal" >
<Button android:id="@+id/button04"
android:layout_width="match_parent"
android:text="播放来自网络的音频文件"/>
</TableRow>

</TableLayout>

</RelativeLayout>

package com.example.testmediaplayer;

import java.io.IOException;

import android.media.MediaPlayer;
import android.net.Uri;
import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.res.AssetFileDescriptor;
import android.content.res.AssetManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.MenuItem.OnMenuItemClickListener;
import android.view.View;
import android.widget.Button;

@SuppressLint("SdCardPath")
public class MainActivity extends Activity {

private Button btn01, btn02, btn03, btn04;
//method01
/*private MediaPlayer[] mp;*/
private MediaPlayer m;
private AssetManager assetManager;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btn01 = (Button)this.findViewById(R.id.button01);
btn02 = (Button)this.findViewById(R.id.button02);
btn03 = (Button)this.findViewById(R.id.button03);
btn04 = (Button)this.findViewById(R.id.button04);

btn01.setOnClickListener(new ClickEvent());
btn02.setOnClickListener(new ClickEvent());
btn03.setOnClickListener(new ClickEvent());
btn04.setOnClickListener(new ClickEvent());

assetManager = this.getAssets();

//method01
/*mp = new MediaPlayer[4];
mp[0] = MediaPlayer.create(getApplicationContext(), R.raw.babysong01);
for(int k=1; k<4; k++)
mp[k] = new MediaPlayer();*/

//		m = new MediaPlayer(); //用下面个方法初始化更好
m = MediaPlayer.create(getApplicationContext(), R.raw.babysong01);
}

class ClickEvent implements View.OnClickListener{

@Override
public void onClick(View v) {
// TODO Auto-generated method stub
//			only01();
only02();
if(v == btn01){
//method01
/*mp[0] = MediaPlayer.create(getApplicationContext(), R.raw.babysong01);
mp[0].start();*/
System.out.println("---播放应用的资源文件----");
m = MediaPlayer.create(getApplicationContext(), R.raw.babysong01);
m.start();
}

if(v == btn02){
try {
System.out.println("---播放assest的资源文件----");
AssetFileDescriptor fileDescriptor = assetManager.openFd("babysong02.mp3");
//method01
/*mp[1].setDataSource(fileDescriptor.getFileDescriptor(),
fileDescriptor.getStartOffset(),
fileDescriptor.getLength());
mp[1].prepare();
mp[1].start();*/

m.setDataSource(fileDescriptor.getFileDescriptor(),
fileDescriptor.getStartOffset(),
fileDescriptor.getLength());
m.prepare();
m.start();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}

if(v == btn03){
try {
System.out.println("---播放SDcard上的文件---");
//method01
/*mp[2].setDataSource("/mnt/sdcard/mp3/03.mp3");
mp[2].prepare();*/

m.setDataSource("/mnt/sdcard/mp3/03.mp3");
m.prepare();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
/*mp[2].start();*/
m.start();
}

if(v == btn04){
System.out.println("播放网络上的音频");
Uri uri = Uri.parse("http://music.baidu.com/data/music/file?link=http://zhangmenshiting.baidu.com/data" +
"2/music/7338475/733847361200128.mp3?xcode=53ba6db76a1e63da466d3cc47229d7cc29a4413e4518cd10");
try {
//method01
/*mp[3].setDataSource(getApplicationContext(), uri);
mp[3].prepare();*/

m.setDataSource(getApplicationContext(), uri);
m.prepare();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SecurityException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

/*mp[3].start();*/
m.start();
}

}

}
//method01
/*	void only01(){
for(int i=0; i<4; i++)
if(mp[i].isPlaying()){
mp[i].stop();
mp[i].reset();
}
}*/

//保持播放歌曲的唯一性
void only02(){
m.stop();
m.reset();
}
@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);
MenuItem item = menu.add(menu.NONE, menu.NONE, menu.NONE, "Exit");
item.setOnMenuItemClickListener(new OnMenuItemClickListener() {

@Override
public boolean onMenuItemClick(MenuItem item) {
// TODO Auto-generated method stub
//method01
/*for(int j=0; j<4; j++)
mp[j].release();*/

m.release();
System.exit(0);
return false;
}
});
return true;
}

}