Android (Notification)消息推送机制

从网上查询资料学习Android消息推送机制，效果图如下：

1.首先是布局文件代码 activity_main.xml

 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" />

2.然后是java主界面代码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) { // 启动Service Intent intent = new Intent();
            intent.setAction("ymw.MY_SERVICE");
            startService(intent);
        } if (id == R.id.btnStop) { // 关闭Service Intent intent = new Intent();
            intent.setAction("ymw.MY_SERVICE");
            stopService(intent);
        }
    }

    @Override public void onBackPressed() {
        System.exit(0); super.onBackPressed();
    }

}

3.然后是消息推送服务文件 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 { // 获取消息线程 private MessageThread messageThread = null; // 点击查看 private Intent messageIntent = null; private PendingIntent messagePendingIntent = null; // 通知栏消息 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); // 开启线程 messageThread = new MessageThread();
        messageThread.isRunning = true;
        messageThread.start(); return super.onStartCommand(intent, flags, startId);
    } /** * 从服务器端获取消息
     * */ class MessageThread extends Thread { // 设置是否循环推送 public boolean isRunning = true; public void run() { // while (isRunning) { try { // 间隔时间 Thread.sleep(1000); // 获取服务器消息 String serverMessage = getServerMessage(); if (serverMessage != null && !"".equals(serverMessage)) { // 更新通知栏  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递增一下，避免消息覆盖掉 messageNotificationID++;
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            } // }  }
    }

    @Override public void onDestroy() { // System.exit(0); messageThread.isRunning = false; super.onDestroy();
    } /** * 模拟发送消息
     * 
     * @return 返回服务器要推送的消息，否则如果为空的话，不推送 */ public String getServerMessage() { return "NEWS!";
    }
}

 

4.最后别忘了在mainfeast.xml文件中配置Service

项目代码如下链接：

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