public class MyService  extends IntentService{    AlarmManager alarmManager = null;    PendingIntent alarmIntent = null;        public MyService(){        super("MyService");    }        public MyService(String name){        super(name);    }        @Override    public IBinder onBind(Intent arg0) {        return null;    }        @Override    public void onCreate() {        super.onCreate();        alarmManager = (AlarmManager)this.getSystemService(Context.ALARM_SERVICE);        Intent intentTo = new Intent("com.yan.receive.MY_ALARM");        alarmIntent = PendingIntent.getBroadcast(this, 0, intentTo, 0);    }    @Override    protected void onHandleIntent(Intent arg0) {        //final Context context = this.getApplicationContext();                int alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP;        long triggerAtMillis = SystemClock.elapsedRealtime()+(5*1000);//执行间隔时间5s        long intervalMillis = 2*1000;            alarmManager.setInexactRepeating(alarmType, triggerAtMillis, intervalMillis, alarmIntent);                System.out.println("============执行============");    }}

public class MyAlarmReceiver  extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent arg1) {        Intent startIntent = new Intent(context, MyService.class);        context.startService(startIntent);    }}

public class MainActivity extends ActionBarActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                if (savedInstanceState == null) {            getSupportFragmentManager().beginTransaction()                    .add(R.id.container, new PlaceholderFragment()).commit();        }    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }    /**     * A placeholder fragment containing a simple view.     */    public static class PlaceholderFragment extends Fragment {        Button btnStart;        Button btnClose;        AlarmManager alarmManager = null;        PendingIntent alarmIntent = null;                public PlaceholderFragment() {        }        @Override        public View onCreateView(LayoutInflater inflater, ViewGroup container,                Bundle savedInstanceState) {            View rootView = inflater.inflate(R.layout.fragment_main, container,false);                        btnStart = (Button)rootView.findViewById(R.id.btnStart);            btnClose = (Button)rootView.findViewById(R.id.btnClose);            btnStart.setOnClickListener(btnClickLIstener());            btnClose.setOnClickListener(btnClickLIstener());                        return rootView;        }                OnClickListener btnClickLIstener(){            return new OnClickListener(){                @Override                public void onClick(View arg0) {                    switch(arg0.getId()){                    case R.id.btnStart:                        // 启动服务                        Intent myIntent = new Intent(getActivity(),  MyService.class);                        getActivity().startService(myIntent);                        System.out.println("=========启动服务");                        break;                    case R.id.btnClose:                        alarmManager = (AlarmManager)getActivity().getSystemService(Context.ALARM_SERVICE);                        Intent intentTo = new Intent("com.yan.receive.MY_ALARM");                        alarmIntent = PendingIntent.getBroadcast(getActivity(), 0, intentTo, 0);                        if(null != alarmIntent){                            alarmManager.cancel(alarmIntent);                        }                        System.out.println("=========停止Alarm");                        getActivity().stopService(new Intent(getActivity(),  MyService.class));                        System.out.println("=========停止服务");                        break;                    }                }            };        }    }}

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/container"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="com.example.intentservice.MainActivity"    tools:ignore="MergeRootFrame" />

<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.intentservice.MainActivity$PlaceholderFragment" >    <Button        android:id="@+id/btnStart"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="开启任务" />    <Button        android:layout_below="@id/btnStart"        android:id="@+id/btnClose"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:text="关闭任务" /></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.intentservice"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="19" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >                <receiver            android:name="com.yan.receive.MyAlarmReceiver"            android:enabled="true"            android:exported="false" >            <intent-filter>                <action android:name="com.yan.receive.MY_ALARM" />            </intent-filter>        </receiver>        <service            android:name="com.yan.service.MyService"            android:enabled="true"            android:exported="false" />                <activity            android:name="com.example.intentservice.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>    </application></manifest>