Android四大组件之Service

这个代码可以帮助不了解Service的朋友很直观的去学习Service;

AndroidManifest.xml文件：

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.android_service"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <service android:name=".Myservice"></service>
    </application>

</manifest>

注意啊，在AndroidManifest.xml文件中要改成和你所创建的包名一致啊，（初学者）

 

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >
    
    <TextView 
        android:layout_marginTop="8dip"
        android:id="@+id/activitys_tv"
        android:layout_width="100dip"
        android:layout_height="30dip"
        android:text="Android四大组件Android四大组件"
        android:ellipsize="marquee"
        android:focusable="true"
        android:singleLine="true"
        android:marqueeRepeatLimit="marquee_forever"
        android:layout_marginLeft="105dip"
        android:focusableInTouchMode="true"
        android:scrollHorizontally="true"
         />
    
    <TextView 
        android:layout_marginTop="8dip"
        android:id="@+id/service_tv"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="textview"/>
    <Button 
         android:layout_marginTop="8dip"
        android:id="@+id/startservice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="startservice"
        />
    <Button 
         android:layout_marginTop="8dip"
        android:id="@+id/stopservice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="stopservice"/>

    <Button
         android:layout_marginTop="8dip"
        android:id="@+id/Bindservice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Bindservice" />
    <Button 
         android:layout_marginTop="8dip"
        android:id="@+id/Unbindservice"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Unbindservice"/>

</LinearLayout>

 

 

 Myservice.java代码：

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

public class Myservice extends Service {
  MediaPlayer player ;
    public Myservice() {
         Log.i("Myservice", "构造方法---------->Myservice()");
    }
public class myIbind extends Binder{
    
}
    @Override
    public IBinder onBind(Intent arg0) {
         Log.i("Myservice", "onBind---------->");
         if (player.isPlaying()) {
            player.stop();
        }else {
            player.start();
        }
        return new myIbind();
    }

     
    @Override
    public void onCreate() {
        super.onCreate();
         player = MediaPlayer.create(this,R.raw.danshen);
         Log.i("Myservice", "onCreate---------->");
         
    }

     
    
     
    @Override
    public void onRebind(Intent intent) {
         Log.i("Myservice", "onRebind---------->");
        super.onRebind(intent);
    }
 
    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
         Log.i("Myservice", "onStartCommand---------->");
         player = MediaPlayer.create(this,R.raw.danshen);
            player.start();
         
        return super.onStartCommand(intent, flags, startId);
    }

     
    @Override
    public boolean onUnbind(Intent intent) {
         Log.i("Myservice", "onUnbind---------->");
        return super.onUnbind(intent);
    }
    @Override
    public void onDestroy() {
         Log.i("Myservice", "onDestroy---------->");
         player.stop();
        super.onDestroy();
    }


}

MainActivity.java代码：

import com.example.android_service.Myservice.myIbind;
import android.app.Activity;
import android.content.ComponentName;
import android.content.Intent;
import android.content.ServiceConnection;
import android.os.Bundle;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;



public class MainActivity extends Activity implements OnClickListener {
   private Button startbtn,stopbtn,bindbtn,unbindbtn;
   private TextView tv ;
   
   ServiceConnection conn = new ServiceConnection() {
    
    @Override
    public void onServiceDisconnected(ComponentName name) {
        //绑定意外断开时调用
        Log.i("Myservice", "onServiceDisconnected》》》》》绑定失败");
    }
    
    @Override
    public void onServiceConnected(ComponentName name, IBinder service) {
        //绑定成功后调用
        Log.i("Myservice", "onServiceConnected>>>>>>>>>绑定成功");
        Myservice.myIbind mybind =(myIbind) service ;
        
    }
};
      
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        startbtn = (Button) findViewById(R.id.startservice);
        stopbtn = (Button) findViewById(R.id.stopservice);
        bindbtn = (Button) findViewById(R.id.Bindservice);
        unbindbtn = (Button) findViewById(R.id.Unbindservice);
        
        tv = (TextView) findViewById(R.id.service_tv);
        
        startbtn.setOnClickListener(this);
        stopbtn.setOnClickListener(this);
        bindbtn.setOnClickListener(this);
        unbindbtn.setOnClickListener(this);
        
    }

    @Override
    public void onClick(View v) {
        Intent intent = new Intent(MainActivity.this,Myservice.class);
         switch (v.getId()) {
        case R.id.startservice:
            startService(intent);
            break;
        case R.id.stopservice:
            stopService(intent);
            break;
        case R.id.Bindservice:
            bindService(intent, conn, BIND_AUTO_CREATE);
            break;
        case R.id.Unbindservice:
            unbindService(conn);
            break;

        default:
            break;
        }
        
    }

     
     
 
     

}

 

注意：代码中R.raw.danshen中raw是在res文件夹下创建的新文件夹，danshen是一首歌的名字，将歌曲复制，粘贴到新建的raw文件夹中即可，此处是工程的关键点，当然，是对新手而言。

我的代码适合新手，所贴出的代码均是全部代码，复制到eclipse中即可使用，代码中基本没有注释，这是我和很多博友不同的地方，我先给初学者正确的代码，运行处真正的结果，然后去仔细看代码，既能增加兴趣，又有学习的节奏和目的性，所传代码，看似简单，但所学知识均匀涉及，当然，我也是新手，只是想借这个平台提升自己的境界，这很重要，好了，就到这里了。