Service Broadcast BroadcastReceiver AlarmManager,Notification利用service定时/周期性发送广播

1.如题








主要实现
1.启动service，关闭service；
2.activity 向service发送广播。
3.service向 activity发送广播。
4.service 利用AliarmMnager定时向activity push 数据，其实也是发了个广播。
5.service 利用AliarmMnager周期性的向 activity push 数据，其实也是发了个广播
6.定时/周期性向通知栏推送消息

1.Demo.java

package aliusa.cn;

import android.app.Activity;

/**
 * The Class Demo.
 * @author aliusa
 */
public class Demo extends Activity{
   
   TextView textView;
   
   Button[] btn;
   
   MyReceiver receiver = new MyReceiver();
   
   static final String ACTION = "aliusa.cn.Demo";
   String serviceState = "MyService is not Running.";
   String requireData = "The data is";
   
   
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        final LinearLayout layout = new LinearLayout(this);
        layout.setOrientation(LinearLayout.VERTICAL);
        layout.setGravity(Gravity.CENTER);
        textView = new TextView(this);
        textView.setText(serviceState + requireData);
        layout.addView(textView);
        
        btn = new Button[6];
        btn[0] = new Button(this);
        btn[1] = new Button(this);
        btn[2] = new Button(this);
        btn[3] = new Button(this);
        btn[4] = new Button(this);
        btn[5] = new Button(this);
        
        btn[0].setText("StopService");
        btn[1].setText("BackGround");
        btn[2].setText("RequireData");
        btn[3].setText("StartService");
        btn[4].setText("RequireDataDelay 5s");
        btn[5].setText("RequireDataRepeating 5s");
        
        //1.activity communicate with service through broadcast
        btn[0].setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                stopService();
            }
        });

        btn[1].setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                finish();
            }
        });

        //2.activity communicate with service through service instance.
        btn[2].setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                MyService.getInstance().pushDataImmediately();
            }
        });

        btn[3].setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                startService();
            }
        });
        
        btn[4].setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                MyService.getInstance().pushDataDelay();
            }
        });
        
        btn[5].setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                MyService.getInstance().pushDataRepeating();
            }
        });
        
        layout.addView(btn[0]);
        layout.addView(btn[1]);
        layout.addView(btn[2]);
        layout.addView(btn[3]);
        layout.addView(btn[4]);
        layout.addView(btn[5]);
        setContentView(layout);
        
        startService();
    }
    
    Handler myHandler = new Handler() {
        public void handleMessage(Message msg) {
            textView.setText(serviceState + requireData);
            super.handleMessage(msg);
        }
    };
    

    public void startService(){
        receiver = new MyReceiver();
        IntentFilter filter = new IntentFilter();
        filter.addAction(ACTION);
        registerReceiver(receiver, filter);
        
        Intent i = new Intent(this, MyService.class);
        startService(i);
        
        serviceState = "MyService is Running.";
        myHandler.sendEmptyMessage(0);
    }
    
    
    @Override
    protected void onDestroy() {
        unregisterReceiver(receiver);
        myHandler = null;
        super.onDestroy();
    }
    
    public class MyReceiver extends BroadcastReceiver {
        
        public void onReceive(Context context, Intent intent) {
            Bundle bundle = intent.getExtras();
            int data = bundle.getInt("data");
            requireData = "The data is "+data;
            myHandler.sendEmptyMessage(0);
        }
    }
    
    public void stopService(){
        Intent intent = new Intent();
        intent.setAction(MyService.ACTION);
        intent.putExtra("cmd", MyService.SERVICE_STOP);
        sendBroadcast(intent);
        serviceState = "MyService is not Running.";
        myHandler.sendEmptyMessage(0);
    }
 
}

2.MyService.java

package aliusa.cn;


import android.app.AlarmManager;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.IBinder;
import android.os.SystemClock;

import java.util.Calendar;
import java.util.Random;

/**
 * The Class MyService.
 * @author aliusa
 */
public class MyService extends Service{
    
    static final int SERVICE_STOP = 0;
    
    static final int SERVICE_PUSH_DATA = 1;
    
    static final String ACTION= "aliusa.cn.MyService";
    
    static MyService instance = null;
    
    MyReceiver recevier;
    
    NotificationManager nm;

    AlarmManager am;
    PendingIntent senderDelay;
    PendingIntent senderRepeating;
    
    
    public void registerReviver(){
        recevier = new MyReceiver();
        IntentFilter filter1 = new IntentFilter();
        filter1.addAction(ACTION);
        registerReceiver(recevier, filter1);
    }
    
    
    class MyReceiver extends BroadcastReceiver {
        
        public void onReceive(Context context, Intent intent) {
            int cmd = intent.getIntExtra("cmd", -1);
            switch (cmd) {
                case MyService.SERVICE_STOP:
                    stopSelf();
                    break;
                case MyService.SERVICE_PUSH_DATA:
                    pushDataImmediately();
                    break;
            }
        }
    }


    @Override
    public IBinder onBind(Intent arg0) {
        return null;
    }



    @Override
    public void onCreate() {
        instance = this;
        super.onCreate();
    }


    @Override
    public void onStart(Intent intent, int startId) {
        registerReviver();
        super.onStart(intent, startId);
    }
    
    

    /**
     * Push data.
     */
    public void pushData(){
        final Random random = new Random();
        Intent i = new Intent();
        i.setAction(Demo.ACTION);
        i.putExtra("data", random.nextInt(100));
        sendBroadcast(i);
    }
    
    
    public void pushDataImmediately(){
        showNotification();
        pushData();
    }
 
    
    private void showNotification() {
        nm = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
        Intent intent = new Intent(this, Demo.class);
        PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
        Notification myNotification = new Notification();
        myNotification.icon = R.drawable.icon;
        myNotification.defaults = Notification.DEFAULT_ALL;
        myNotification.setLatestEventInfo(this, "MyService is running", "chose to have a look", pi);
        nm.notify(0, myNotification);
    }

    
    @Override
    public void onDestroy() {
        cancelAlarmManager();
        if (nm != null){
            nm.cancelAll();
        }
        unregisterReceiver(recevier);
        System.out.println("MyService.onDestroy");
        super.onDestroy();
    }
    
  
    public void pushDataDelay() {
        Intent intent = new Intent();
        intent.setAction(MyService.ACTION);
        intent.putExtra("cmd", MyService.SERVICE_PUSH_DATA);
        senderDelay = PendingIntent.getBroadcast(this, 0, intent, 0);        
        //设定一个五秒后的时间    
        Calendar calendar=Calendar.getInstance();    
        calendar.setTimeInMillis(System.currentTimeMillis());    
        calendar.add(Calendar.SECOND, 5);        
        am =(AlarmManager)getSystemService(ALARM_SERVICE);    
        am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), senderDelay);    
        //或者以下面方式简化    
        //alarm.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+5*1000, senderDelay);
    }
    
    /**
     * Require data.
     */
    public void pushDataRepeating() {
        Intent intent = new Intent();
        intent.setAction(MyService.ACTION);
        intent.putExtra("cmd", MyService.SERVICE_PUSH_DATA);
        senderRepeating = PendingIntent.getBroadcast(this, 1, intent, 0);        
        //开始时间    
        long firstime=SystemClock.elapsedRealtime();    
        am=(AlarmManager)getSystemService(ALARM_SERVICE);
        //5秒一个周期，不停的发送广播    
        am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, firstime, 5*1000, senderRepeating);
    }
    
    public void cancelAlarmManager(){
        if (am != null) {
            if (senderDelay != null) {
                am.cancel(senderDelay);
                senderDelay = null;
            }
            if (senderRepeating != null) {
                am.cancel(senderRepeating);
                senderRepeating = null;
            }
            am = null;
        }
    }


    public static MyService getInstance() {
        return instance;
    }
       
}

3.AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest
    xmlns:android="http://schemas.android.com/apk/res/android"
    package="aliusa.cn"
    android:versionCode="1"
    android:versionName="1.0">
    <uses-permission android:name="android.permission.VIBRATE"></uses-permission>
    <application
        android:icon="@drawable/icon"
        android:label="@string/app_name">
        <activity
            android:name=".Demo"
            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="aliusa.cn.MyService">
        </service>
    </application>
    <uses-sdk
        android:minSdkVersion="7" />

</manifest>