Android (Notification)消息推送機制

從網上查詢資料學習Android消息推送機制，效果圖以下：

1.首先是佈局文件代碼 activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" >

    <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="hello" />

    <Button android:id="@+id/btnStart" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="通知" />

    <Button android:id="@+id/btnStop" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="清除" />

</LinearLayout>

2.而後是java主界面代碼MainActivity.java

package com.example.notificationservice; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity implements OnClickListener { private Button btnStart; private Button btnStop; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); initView(); } private void initView() { btnStart = (Button) findViewById(R.id.btnStart); btnStop = (Button) findViewById(R.id.btnStop); btnStart.setOnClickListener(this); btnStop.setOnClickListener(this); } @Override public void onClick(View v) { int id = v.getId(); if (id == R.id.btnStart) { // 啓動Service
            Intent intent = new Intent(); intent.setAction("ymw.MY_SERVICE"); startService(intent); } if (id == R.id.btnStop) { // 關閉Service
            Intent intent = new Intent(); intent.setAction("ymw.MY_SERVICE"); stopService(intent); } } @Override public void onBackPressed() { System.exit(0); super.onBackPressed(); } }

3.而後是消息推送服務文件 NotificationService.java

package com.example.notificationservice; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.os.IBinder; public class NotificationService extends Service { // 獲取消息線程
    private MessageThread messageThread = null; // 點擊查看
    private Intent messageIntent = null; private PendingIntent messagePendingIntent = null; // 通知欄消息
    private int messageNotificationID = 1000; private Notification messageNotification = null; private NotificationManager messageNotificatioManager = null; public IBinder onBind(Intent intent) { return null; } @Override public int onStartCommand(Intent intent, int flags, int startId) { // 初始化
        messageNotification = new Notification(); messageNotification.icon = R.drawable.ic_launcher; messageNotification.tickerText = "新消息"; messageNotification.defaults = Notification.DEFAULT_SOUND; messageNotificatioManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); messageIntent = new Intent(this, MainActivity.class); messagePendingIntent = PendingIntent.getActivity(this, 0, messageIntent, 0); // 開啓線程
        messageThread = new MessageThread(); messageThread.isRunning = true; messageThread.start(); return super.onStartCommand(intent, flags, startId); } /** * 從服務器端獲取消息 * */
    class MessageThread extends Thread { // 設置是否循環推送
        public boolean isRunning = true; public void run() { // while (isRunning) {
            try { // 間隔時間
                Thread.sleep(1000); // 獲取服務器消息
                String serverMessage = getServerMessage(); if (serverMessage != null && !"".equals(serverMessage)) { // 更新通知欄
 messageNotification.setLatestEventInfo( getApplicationContext(), "新消息", "您有新消息。"
                                    + serverMessage, messagePendingIntent); messageNotificatioManager.notify(messageNotificationID, messageNotification); // 每次通知完，通知ID遞增一下，避免消息覆蓋掉
                    messageNotificationID++; } } catch (InterruptedException e) { e.printStackTrace(); } // }
 } } @Override public void onDestroy() { // System.exit(0);
        messageThread.isRunning = false; super.onDestroy(); } /** * 模擬發送消息 * * @return 返回服務器要推送的消息，不然若是爲空的話，不推送 */
    public String getServerMessage() { return "NEWS!"; } }

 

4.最後別忘了在mainfeast.xml文件中配置Service

項目代碼以下連接：

http://files.cnblogs.com/_ymw/NotificationService_%E5%8D%9A%E5%AE%A2%E9%99%84%E4%BB%B6.rar