每天进步一点----- Service

package com.example.servicetest;

import android.app.Notification;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;

public class MyService extends Service {

    private DownloadBinder mBinder = new DownloadBinder();

    class DownloadBinder extends Binder {

        public void startDownload() {
            new Thread(new Runnable() {
                @Override
                public void run() {
                    // start downloading
                }
            }).start();
            Log.d("MyService", "startDownload executed");
        }

        public int getProgress() {
            Log.d("MyService", "getProgress executed");
            return 0;
        }

    }

    @Override
    public IBinder onBind(Intent intent) {
        Log.d("MyService", "onBind executed");
        return mBinder;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        Notification notification = new Notification(R.drawable.ic_launcher,
                "Notification comes", System.currentTimeMillis());
        Intent notificationIntent = new Intent(this, MainActivity.class);
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
                notificationIntent, 0);
        notification.setLatestEventInfo(this, "This is title", "This is content",
                pendingIntent);
        startForeground(1, notification);
        Log.d("MyService", "onCreate executed");
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        Log.d("MyService", "onStartCommand executed");
        new Thread(new Runnable() {  
            @Override  
            public void run() {  
                // do something here
            }  
        }).start();
        return super.onStartCommand(intent, flags, startId);
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
        Log.d("MyService", "onDestroy executed");
    }

}

package com.example.servicetest;

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;

public class MainActivity extends Activity implements OnClickListener {

    private Button startService;

    private Button stopService;

    private Button bindService;

    private Button unbindService;

    private Button startIntentService;

    private MyService.DownloadBinder downloadBinder;

    private ServiceConnection connection = new ServiceConnection() {

        @Override
        public void onServiceDisconnected(ComponentName name) {
        }

        @Override
        public void onServiceConnected(ComponentName name, IBinder service) {
            downloadBinder = (MyService.DownloadBinder) service;
            downloadBinder.startDownload();
            downloadBinder.getProgress();
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        startService = (Button) findViewById(R.id.start_service);
        stopService = (Button) findViewById(R.id.stop_service);
        bindService = (Button) findViewById(R.id.bind_service);
        unbindService = (Button) findViewById(R.id.unbind_service);
        startIntentService = (Button) findViewById(R.id.start_intent_service);
        startService.setOnClickListener(this);
        stopService.setOnClickListener(this);
        bindService.setOnClickListener(this);
        unbindService.setOnClickListener(this);
        startIntentService.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
        case R.id.start_service:
            Intent startIntent = new Intent(this, MyService.class);
            startService(startIntent);
            break;
        case R.id.stop_service:
            Intent stopIntent = new Intent(this, MyService.class);
            stopService(stopIntent);
            break;
        case R.id.bind_service:
            Intent bindIntent = new Intent(this, MyService.class);
            bindService(bindIntent, connection, BIND_AUTO_CREATE);
            break;
        case R.id.unbind_service:
            unbindService(connection);
            break;
        case R.id.start_intent_service:
            Log.d("MainActivity", "Thread id is " + Thread.currentThread().getId());
            Intent intentService = new Intent(this, MyIntentService.class);
            startService(intentService);
            break;
        default:
            break;
        }
    }

}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.servicetest"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.servicetest.MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category           android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

        <service android:name=".MyService" >
        </service>
        <service android:name=".MyIntentService"></service>
    </application>

</manifest>