service 音乐播放

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1.bofaactivity

package com.example.bkmusic;

import java.io.IOException;

import com.example.bkmusic.R.dimen;

import android.R;
import android.R.drawable;
import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;

public class AddBKMusic extends Service {

   private MediaPlayer mp;

   @SuppressWarnings("deprecation")
   public void onStart(Intent intent,int startId){

       mp.start();

       mp.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {

           @Override
           public void onCompletion(MediaPlayer mp) {
               // TODO Auto-generated method stub

               try{
               mp.start();
               }catch(Exception e){
                   e.printStackTrace();
               }
           }
       });
       mp.setOnErrorListener(new MediaPlayer.OnErrorListener() {

           @Override
           public boolean onError(MediaPlayer mp, int what, int extra) {
               // TODO Auto-generated method stub

               try{
               mp.release();
               }catch(Exception e){
                   e.printStackTrace();
               }
               return false;
           }
       });

       super.onStart(intent, startId);
   }

   public void onCreate(){

       try{
           mp = new MediaPlayer();

           mp = MediaPlayer.create(AddBKMusic.this, com.example.bkmusic.R.raw.bk);

                mp.prepare();
            } catch (IllegalStateException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

            super.onCreate();
        }

   public void onDestroy() {

            mp.stop();
            mp.release();

            super.onDestroy();
        }


   @Override
   public IBinder onBind(Intent intent) {
       // TODO Auto-generated method stub
       return null;
   }

}

2.mainactivity

package com.example.bkmusic;

import android.app.AliasActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AliasActivity {

   public Button btu;

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

        findView();
   }

   private void findView() {
       // TODO Auto-generated method stub
       btu = (Button) findViewById(R.id.btu);
       btu.setOnClickListener(new Button.OnClickListener() {
            @Override
            public void onClick(View v) {
               Intent intent = new Intent(MainActivity.this,AddBKMusic.class);
                 startService(intent);

            }
        });
   }

   @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);
       return true;
   }

   @Override
   public boolean onOptionsItemSelected(MenuItem item) {
       // Handle action bar item clicks here. The action bar will
       // automatically handle clicks on the Home/Up button, so long
       // as you specify a parent activity in AndroidManifest.xml.
       int id = item.getItemId();
       if (id == R.id.action_settings) {
           return true;
       }
       return super.onOptionsItemSelected(item);
   }
}

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