2 orangexxoo orangexxoo 于 2015.05.28 23:51 提问

startservice之后onstartcommand却没有启动

mainactivity代码
package com.example.test_01;

//import android.R;
import java.util.List;

import com.example.service.PlayerService;

import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.content.Intent;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ImageButton;

public class MainActivity extends ActionBarActivity
implements MainFragment.OnMainFragmentInteractionListener,
MyMusicFragment.OnMyMusicFragmentInteractionListener
{

//记录当前播放器的状态
private boolean isPause;
private FragmentManager fragmentManager;  
private FragmentTransaction fragmentTransaction;  
private MainFragment mainFragment;  
private MyMusicFragment myMusicFragment;

//查找歌曲的类
private FindSongs finder;
//歌曲列表

public static List mp3Infos;
//音乐的位置
public static int music_position;
//播放按钮控件
private ImageButton play_button;
/*
这个方法是activity和fragment通信的一种方法
在MainFragment中调用这个方法,可以在activity中做出相应的反应
*/

public void onMainFragmentInteraction(int msg){

    /* 
    对其中的参数msg做出判断,如果为CHANGE_TO_MY_MUSIC_FRAGMENT 
    则执行跳转 
     */  
    if(msg == AppConstant.PlayerMsg.CHANGE_TO_MY_MUSIC_FRAGMENT){  

        /* 
        在这里并没有直接切换Fragment 
        而是调用了activity实现MyMusicFragment的那个接口 
        对后面的开发能带来一点便利之处 
         */  
        onMyMusicFragmentInteraction
        (AppConstant.PlayerMsg.CHANGE_TO_MY_MUSIC_FRAGMENT);  
    }  
}  

public void onMyMusicFragmentInteraction(int msg){

    myMusicFragment = new MyMusicFragment(MainActivity.this);       //创建了MyMusicFragment的实例  
    FragmentManager fragmentManager = getFragmentManager();   //得到FragmentManager  
    FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction(); //得到fragmentTransaction  



    if(msg == AppConstant.PlayerMsg.CHANGE_TO_MY_MUSIC_FRAGMENT){  

        fragmentTransaction.replace(R.id.fragment_layout, myMusicFragment);  
        fragmentTransaction.addToBackStack(null);       
        //这句话是将被替换的MainFragment加入到一个专门存放fragment的栈中,在回退的时候显示上一个Fragment  
        fragmentTransaction.commit(); 
    }  


    if(msg == AppConstant.PlayerMsg.BACK_TO_MAIN_FRAGMENT){  

        fragmentTransaction.replace(R.id.fragment_layout, mainFragment);  
        fragmentTransaction.addToBackStack(null);  
        fragmentTransaction.commit();  
    }  
}  

public void onMyMusicFragmentInteraction(int msg,int position){

   if(msg == AppConstant.PlayerMsg.LIST_CLICK){  
       if (mp3Infos != null) { 
          // Log.i("dada", "-------------here------------");
           isPause = false;  
           initService(position); 

       }  
   }  

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

     music_position = 0;  
        finder = new FindSongs();  
        mp3Infos = finder.getMp3Infos(getContentResolver());  


        play_button = (ImageButton)findViewById(R.id.play_button); 
    //mainFragment = new MainFragment();           
    //创建了刚才定义的MainFragment实例  
    mainFragment = new MainFragment(MainActivity.this); 

    fragmentManager = getFragmentManager();      
    //得到FragmentManager  
    fragmentTransaction = fragmentManager.beginTransaction();   
    //得到fragmentTransaction,用于管理fragment的切换  
    fragmentTransaction.replace(R.id.fragment_layout, mainFragment).commit(); 
    //将MainActivity里的布局模块fragment_layout替换为mainFragment  
}


@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);
}
private void initService(int position) {  


    music_position = position;  
    Mp3Info mp3Info = mp3Infos.get(position);  


    /* 
    这里新建了一个Intent 
    里面存放各种即将传给Service的数据 
    要启动自定义PlayerService类 
    还需要在AndroidManifest中加入如下代码 

    <service 
        android:name="com.example.dada.myapplication.PlayerService" 
        android:exported="false" 
        > 
    </service> 

     */  
    //Intent intent = new Intent("com.example.service.PlayerService");  
    Intent intent = new Intent(MainActivity.this, PlayerService.class);

    play_button.setImageResource(R.drawable.play_pause);  
    intent.putExtra("url", mp3Info.getUrl());  
    intent.putExtra("title", mp3Info.getTitle());  
    intent.putExtra("artist", mp3Info.getArtist());  
    intent.putExtra("album", mp3Info.getAlbum());  
    intent.putExtra("album_id", mp3Info.getAlbum_id());  
    intent.putExtra("MSG", AppConstant.PlayerMsg.PLAY_MSG);  
    intent.setClass(MainActivity.this, PlayerService.class);  
    startService(intent);  
    Log.w("dada", "------------hahaha----------");
}

//@Override

// public void onFragmentInteraction(int msg) {
// // TODO Auto-generated method stub
//

// }
}

service代码

package com.example.service;

import java.io.IOException;

import com.example.test_01.AppConstant;
import com.example.test_01.AppConstant.PlayerMsg;

import android.app.Service;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.IBinder;
import android.util.Log;

public class PlayerService extends Service implements AppConstant {

public static MediaPlayer mediaPlayer = null;

private int current_position;  

private String musicPath;  
private String music_artist;  
private String music_title;  
private String notification_msg;
//private MediaPlayer mediaPlayer;

@Override  
public IBinder onBind(Intent intent) {  Log.w("dada", "-------------here------------");
    return null;  

}  
/*
 * onStartCommand()方法就是刚启动service时调用的一个方法
 * 里面第一个参数intent就是在activity中的那个intent
 * 因此里面包含着被点击的歌曲相关信息
 */
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
     //MediaPlayer是android中自带的一个播放器类,直接实例化后使用即可
     mediaPlayer = new MediaPlayer(); 
     Log.w("dada", "-------------here------------");

    try {  
        int msg = intent.getIntExtra("MSG", 0);  
        musicPath = intent.getStringExtra("url");   //从intent中拿出歌曲的路径  
        Log.w("dada", "-------------here------------");
        if (msg == AppConstant.PlayerMsg.PLAY_MSG) { 

            playMusic(0);  
        }  
    } catch (Exception e) {  
        e.printStackTrace();  
    }  
    return 0;  
}  

private void playMusic(int position) { 
    Log.w("dada", "-------------here------------");
    try {  
        mediaPlayer.reset();  
        mediaPlayer.setDataSource(musicPath);  
        mediaPlayer.prepare();  
        mediaPlayer.setOnPreparedListener(new MyPreparedListener(position));  

    } catch (IOException e) {  
        e.printStackTrace();  
    }  
}  

private class MyPreparedListener implements MediaPlayer.OnPreparedListener {  

    private int position;  

    public MyPreparedListener(int position) {  
        this.position = position;  
    }  

    public void onPrepared(MediaPlayer mp) {  
        if (position > 0)  
            Log.i("dada", "-------------here------------");
            mediaPlayer.seekTo(position);  
        mediaPlayer.start();  
    }  
}  

private void stopMusic() {  
    if (mediaPlayer != null) {  
        mediaPlayer.pause();  
    }  
}  

public void onDestory() {  Log.e("dada", "-------------here------------");
    if (mediaPlayer != null) {  
        mediaPlayer.stop();  
        mediaPlayer.release();  
    }  
}
}

startService(intent);后面的log显示了,但是service却没有反应

1个回答

danielinbiti
danielinbiti   Ds   Rxr 2015.05.29 09:38

按理startService应该是经过onStartCommand的,你override一下oncreate,里面加一下日志试试,看create了吗

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