Android中Service的一个Demo例子

<application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".service.ServiceMainActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />


                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
         <!-- 注册Service -->  
        <service android:name="LocalService">  
            <intent-filter>  
                <action android:name="cn.fansunion.service.LocalService" />  
            </intent-filter>  
        </service>  
    </application>

package cn.fansunion.service;


import cn.fansunion.R;
import android.app.Activity;
import android.app.Service;
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.Toast;


public class ServiceMainActivity extends Activity {
	private Button startBtn;
	private Button stopBtn;
	private Button bindBtn;
	private Button unBindBtn;
	private static final String TAG = "MainActivity";
	private LocalService myService;


	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.service);
		startBtn = (Button) findViewById(R.id.start);
		stopBtn = (Button) findViewById(R.id.stop);
		bindBtn = (Button) findViewById(R.id.bind);
		unBindBtn = (Button) findViewById(R.id.unbind);
		startBtn.setOnClickListener(new MyOnClickListener());
		stopBtn.setOnClickListener(new MyOnClickListener());
		bindBtn.setOnClickListener(new MyOnClickListener());
		unBindBtn.setOnClickListener(new MyOnClickListener());
	}


	class MyOnClickListener implements OnClickListener {
		@Override
		public void onClick(View v) {
			Intent intent = new Intent();
			intent.setClass(ServiceMainActivity.this, LocalService.class);
			switch (v.getId()) {
			case R.id.start:						
				// 启动Service
				startService(intent);
				toast("startService");
				break;
			case R.id.stop:
				// 停止Service
				stopService(intent);
				toast("stopService");
				break;
			case R.id.bind:
				// 绑定Service
				bindService(intent, conn, Service.BIND_AUTO_CREATE);
				toast("bindService");
				break;
			case R.id.unbind:
				// 解除Service
				unbindService(conn);
				toast("unbindService");
				break;
			}
		}
	}


	private void toast(final String tip){
		runOnUiThread(new Runnable() {					 
            @Override
            public void run() {
            	Toast.makeText(getApplicationContext(), tip, Toast.LENGTH_SHORT).show();                         
            }
        });
	}
	private ServiceConnection conn = new ServiceConnection() {
		@Override
		public void onServiceConnected(ComponentName name, IBinder service) {
			Log.e(TAG, "连接成功");
			// 当Service连接建立成功后，提供给客户端与Service交互的对象（根据Android Doc翻译的，不知道准确否。。。。）
			myService = ((LocalService.LocalBinder) service).getService();
		}


		@Override
		public void onServiceDisconnected(ComponentName name) {
			Log.e(TAG, "断开连接");
			myService = null;
		}
	};
}

package cn.fansunion.service;


import android.app.Service;
import android.content.Intent;
import android.os.Binder;
import android.os.IBinder;
import android.util.Log;
import android.widget.Toast;


public class LocalService extends Service {
	private static final String TAG = "MyService";
	private final IBinder myBinder = new LocalBinder();


	@Override
	public IBinder onBind(Intent intent) {
		Log.e(TAG, "onBind()");
		//Toast.makeText(this, "onBind()", Toast.LENGTH_SHORT).show();
		return myBinder;
	}


	// 调用startService方法或者bindService方法时创建Service时（当前Service未创建）调用该方法
	@Override
	public void onCreate() {
		Log.e(TAG, "onCreate()");
		//Toast.makeText(this, "onCreate()", Toast.LENGTH_SHORT).show();
	}


	// 调用startService方法启动Service时调用该方法
	@Override
	public void onStart(Intent intent, int startId) {
		Log.e(TAG, "onStart()");		
		//Toast.makeText(this, "onStart()", Toast.LENGTH_SHORT).show();
	}


	// Service创建并启动后在调用stopService方法或unbindService方法时调用该方法
	@Override
	public void onDestroy() {
		Log.e(TAG, "onDestroy()");
		//Toast.makeText(this, "onDestroy()", Toast.LENGTH_SHORT).show();
	}
	//提供给客户端访问
	public class LocalBinder extends Binder {
		LocalService getService() {
			return LocalService.this;
		}
	}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical" android:layout_width="fill_parent"
	android:layout_height="fill_parent">
	<Button android:id="@+id/start" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:text="启动Service" />
	<Button android:id="@+id/stop" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:text="停止Service" />
	<Button android:id="@+id/bind" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:text="绑定Service" />
	<Button android:id="@+id/unbind" android:layout_width="wrap_content"
		android:layout_height="wrap_content" android:text="解除Service" />
</LinearLayout>

Android中Service的一个Demo例子

原文：http://blog.csdn.net/fansunion/article/details/49837455