简单demo诉说Service And Intentservice

前段时间做项目,用到service了,当时只是匆匆忙忙的用了,具体什么原理也不知道,项目上线了,终于有时间学习了,小菜鸟终于可以整理一下

根据程序来看一下service的生命周期(由于布局只有几个按钮,这里就不贴图了)

1.MainActivity.java

package com.sdufe.thea.guo;import android.os.Bundle;import android.os.IBinder;import android.app.Activity;import android.content.ComponentName;import android.content.Intent;import android.content.ServiceConnection;import android.util.Log;import android.view.Menu;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;public class MainActivity extends Activity implements OnClickListener {private Button button1, button2, button3, button4, button5, button6;private String TAG = "MainActivity";private ServiceConnection conn;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initView();conn = new ServiceConnection() {@Overridepublic void onServiceDisconnected(ComponentName name) {Log.d(TAG, "onServiceDisconnected");}@Overridepublic void onServiceConnected(ComponentName name, IBinder service) {Log.d(TAG, "onServiceConnected");}};}private void initView() {button1 = (Button) findViewById(R.id.button1);button2 = (Button) findViewById(R.id.button2);button3 = (Button) findViewById(R.id.button3);button4 = (Button) findViewById(R.id.button4);button5 = (Button) findViewById(R.id.button5);button6 = (Button) findViewById(R.id.button6);button1.setOnClickListener(this);button2.setOnClickListener(this);button3.setOnClickListener(this);button4.setOnClickListener(this);button5.setOnClickListener(this);button6.setOnClickListener(this);}@Overridepublic void onClick(View v) {Intent intent = new Intent(MyService.ACTION);switch (v.getId()) {// 启动服务case R.id.button1:startService(intent);break;// 绑定服务case R.id.button2:bindService(intent, conn, BIND_AUTO_CREATE);break;// 解除服务case R.id.button3:unbindService(conn);break;// 结束服务case R.id.button4:stopService(intent);break;// myservicecase R.id.button5:startService(new Intent(this, MyService.class));break;// myintentservicecase R.id.button6:startService(new Intent(this, MyIntentService.class));break;}}}

布局中存在六个button，其中前四个分别是测试service的生命周期的，最后两个测试service的，由于service不在单独的进程中，又不是线程,还有就是我们习惯性把耗时的操作放在service中,所以来测试一下service和intentService

2.MyService.java

package com.sdufe.thea.guo;import android.app.Service;import android.content.Intent;import android.os.IBinder;import android.util.Log;public class MyService extends Service {private String TAG="MyService";public static final String ACTION="com.sdufe.thea.guo.MyService";@Overridepublic IBinder onBind(Intent intent) {Log.d(TAG, TAG+"onBind");return null;}@Overridepublic void onCreate() {Log.d(TAG, TAG+"onCreate");super.onCreate();}@Override@Deprecatedpublic void onStart(Intent intent, int startId) {Log.d(TAG, TAG+"onStart");try {Thread.sleep(3000);} catch (InterruptedException e) {e.printStackTrace();}Log.d(TAG, TAG+"睡眠结束");super.onStart(intent, startId);}@Overridepublic int onStartCommand(Intent intent, int flags, int startId) {Log.d(TAG, TAG+"onStartCommand");return super.onStartCommand(intent, flags, startId);}@Overridepublic boolean onUnbind(Intent intent) {Log.d(TAG, TAG+"onUnbind");return super.onUnbind(intent);}@Overridepublic void onDestroy() {Log.d(TAG, TAG+"onDestroy");super.onDestroy();}}

在MyService中,主要写了service,为了测试service和IntentService,在OnStart中加入了一段代码,无关大雅,暂时先忽略

3.在AndroidManifest.xml给service注册一下

<service android:name="com.sdufe.thea.guo.MyService" >            <intent-filter>                <action android:name="com.sdufe.thea.guo.MyService" />            </intent-filter>        </service>

首先点击启动服务:

点击结束服务:

点击绑定服务:

结束服务:

注:服务都是成对出现

下面来说一下Service和IntentService,一般费时的操作会放在service,但是当时间长时,会出现Application Not Responding

下面呈上service和IntentService源码,一看就懂了

public abstract class Service extends ContextWrapper implements ComponentCallbacks2 {    private static final String TAG = "Service";    public Service() {        super(null);    }

}

public abstract class IntentService extends Service {    private volatile Looper mServiceLooper;    private volatile ServiceHandler mServiceHandler;    private String mName;    private boolean mRedelivery;    private final class ServiceHandler extends Handler {        public ServiceHandler(Looper looper) {            super(looper);        }        @Override        public void handleMessage(Message msg) {            onHandleIntent((Intent)msg.obj);            stopSelf(msg.arg1);        }    }

}

瞄一眼源码应该就懂了,耗时比较长的还是用IntentService比较靠谱

很多时候服务和通知会一起用,这里也顺便写了写通知,代码如下:

package com.sdufe.thea.guo;import android.app.IntentService;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.Context;import android.content.Intent;import android.util.Log;public class MyIntentService extends IntentService {private String TAG = "MyIntentService";private NotificationManager notificationManager;public MyIntentService() {super("***");}@Overrideprotected void onHandleIntent(Intent intent) {Log.d(TAG, TAG + "onStart");try {Thread.sleep(30000);} catch (InterruptedException e) {e.printStackTrace();}notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);@SuppressWarnings("deprecation")Notification notification = new Notification(R.drawable.ic_launcher,"通知", System.currentTimeMillis());intent = new Intent(getApplicationContext(), SecondActivity.class);PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, 0);notification.setLatestEventInfo(getApplicationContext(), "标题", "内容...",pendingIntent);notificationManager.notify(0, notification);Log.d(TAG, TAG + "睡眠结束");}}

ok,差不多先分享这些

源码地址:http://download.csdn.net/detail/elinavampire/8115975