Service和BroadCast配合使用

package com.example.twentythreecode;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

/**
* @author HD
* @date 2015-12-7
* @package_name com.example.twentythreecode
* @file_name MainActivity.java
*/
public class MainActivity extends Activity {

private Button btnStartService;

Intent intent;

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

btnStartService = (Button) findViewById(R.id.btnStartService);
btnStartService.setOnClickListener(new View.OnClickListener() {

@Override
public void onClick(View v) {
// TODO 自动生成的方法存根
intent = new Intent();
intent.setClass(MainActivity.this, AlarmService.class);
startService(intent);
}
});
}

@Override
protected void onDestroy() {
// TODO 自动生成的方法存根
super.onDestroy();
stopService(intent);
}

}

package com.example.twentythreecode;

import java.util.Date;

import android.app.AlarmManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Context;
import android.content.Intent;
import android.os.IBinder;
import android.os.SystemClock;
import android.util.Log;

/**
* @author HD
* @date 2015-12-7
* @package_name com.example.twentythreecode
* @file_name AlarmService.java
*/
public class AlarmService extends Service {

@Override
public void onCreate() {
// TODO 自动生成的方法存根
super.onCreate();
}

/* （非 Javadoc）
* @see android.app.Service#onStartCommand(android.content.Intent, int, int)
*/
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
// TODO 自动生成的方法存根
new Thread(new Runnable() {

@Override
public void run() {
// TODO 自动生成的方法存根
//              可以将定时处理的事件写在这里
Log.i("hhhd", new Date().toString());
}
}).start();
//      获得一个提醒管理者实例
AlarmManager alarmManager = (AlarmManager) AlarmService.this
.getSystemService(Context.ALARM_SERVICE);
//      定义多久提醒一次
int fiveSec = 5 * 1000;
//      系统开机时间到现在经过的时间
long triggerAtTime = SystemClock.elapsedRealtime() + fiveSec;
Intent alarmIntent = new Intent();
//      alarmIntent.setClass(this, AlarmReceiver.class);
alarmIntent.setAction("com.example.twentythreecode.ACTION_START_ALARMSERVICE");
//      当时间到了，会自动发送一个广播
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0,
alarmIntent, 0);
//      最后的设置，AlarmManager.ELAPSED_REALTIME_WAKEUP表示让定时任务的触
//      发时间从系统开机开始算起，但会唤醒 CPU
alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtTime,
pendingIntent);
return super.onStartCommand(intent, flags, startId);
}

@Override
public IBinder onBind(Intent intent) {
// TODO 自动生成的方法存根
return null;
}

}

package com.example.twentythreecode;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

/**
* @author HD
* @date 2015-12-7
* @package_name com.example.twentythreecode
* @file_name AlarmReceiver.java
*/
public class AlarmReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
// TODO 自动生成的方法存根
Log.i("hhhd", "onReceive");
//      在广播中启动Service
Intent i = new Intent();
intent.setClass(context, AlarmService.class);
context.startService(intent);
}

}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.twentythreecode.MainActivity" >

<Button
android:id="@+id/btnStartService"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:layout_marginTop="174dp"
android:text="启动活动" />

</RelativeLayout>

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

<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="21" />

<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".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=".AlarmService" >
</service>

<receiver android:name=".AlarmReceiver" >
<intent-filter>
<action android:name="com.example.twentythreecode.ACTION_START_ALARMSERVICE" />
</intent-filter>
</receiver>
</application>

</manifest>