我的工程中有两个类,一个是music类,继承activity,另一个是musicServer类,集成service。music类如下:package mx.music;import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;public class music extends Activity {
/** Called when the activity is first created. */
private Intent intent = new Intent("mx.music.MUSIC");
private Button startButton;
private Button stopButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startButton = (Button) findViewById(R.id.startButton);
stopButton = (Button) findViewById(R.id.stopButton);
startButton.setOnClickListener(new startListener());
stopButton.setOnClickListener(new stopListener());
}
class startListener implements OnClickListener{ public void onClick(View v) {
// TODO Auto-generated method stub
startService(intent);
}
}
class stopListener implements OnClickListener{ public void onClick(View v) {
// TODO Auto-generated method stub
stopService(intent);
}
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}musicservice类如下:
package mx.music;import java.io.IOException;import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;public class musicServer extends Service{ private MediaPlayer mp;
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
if(mp==null){
mp=new MediaPlayer();
try{
mp.setDataSource("file:///android_asset/mmp.mp3");
}
catch(Exception e){}
try {
mp.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mp.start();
System.out.println("start music");
}
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mp.stop();
System.out.println("stop music");
}
}
MP3文件在assets目录中放置。
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;public class music extends Activity {
/** Called when the activity is first created. */
private Intent intent = new Intent("mx.music.MUSIC");
private Button startButton;
private Button stopButton;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
startButton = (Button) findViewById(R.id.startButton);
stopButton = (Button) findViewById(R.id.stopButton);
startButton.setOnClickListener(new startListener());
stopButton.setOnClickListener(new stopListener());
}
class startListener implements OnClickListener{ public void onClick(View v) {
// TODO Auto-generated method stub
startService(intent);
}
}
class stopListener implements OnClickListener{ public void onClick(View v) {
// TODO Auto-generated method stub
stopService(intent);
}
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
}
}musicservice类如下:
package mx.music;import java.io.IOException;import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;public class musicServer extends Service{ private MediaPlayer mp;
@Override
public IBinder onBind(Intent arg0) {
// TODO Auto-generated method stub
return null;
}
@Override
public void onStart(Intent intent, int startId) {
// TODO Auto-generated method stub
super.onStart(intent, startId);
if(mp==null){
mp=new MediaPlayer();
try{
mp.setDataSource("file:///android_asset/mmp.mp3");
}
catch(Exception e){}
try {
mp.prepare();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
mp.start();
System.out.println("start music");
}
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
mp.stop();
System.out.println("stop music");
}
}
MP3文件在assets目录中放置。
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error(1,-2147483648)
start called in state 0
error(-38,0)
error(-38,0)在程序的运行过程中点击startbutton在log中会输出start music,点击stopbutton,会输出stop music。
05-16 09:38:10.010: ERROR/MediaPlayer(441): start called in state 0
05-16 09:38:10.010: ERROR/MediaPlayer(441): error (-38, 0)
05-16 09:38:10.049: ERROR/MediaPlayer(441): Error (-38,0)
这是更详细的错误信息。
try {
audioFis = getAssets().open(mmp.mp3);
mp.setDataSource(audioFis.getFD());
}
try 一下