Android开发学习笔记-关于Android的消息推送以及前后台切换

下面是最简单的Android的消息推送的实现方法

package com.example.shownotic;

import java.util.Random;

import android.support.v7.app.ActionBarActivity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.SystemClock;
import android.provider.MediaStore.Audio.Media;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast; public class MainActivity extends ActionBarActivity { private static final int STATUS_BAR_ID = 0;
Button btnShowNotic = null;
private Random random = new Random(20);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnShowNotic = (Button) findViewById(R.id.btnShowNotic);
btnShowNotic.setOnClickListener(new OnClickListener() { @Override
public void onClick(View v) {
// TODO Auto-generated method stub
new Thread(new Runnable() {
public void run() {
while(true)
{
SystemClock.sleep(30000);
showNotic();
}
}
}).start();
showNotic();
} });
}
private void showNotic() {
NotificationManager notificationManger = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
int icon = R.drawable.ic_launcher;
CharSequence tickerText = "Gigade";
long when = System.currentTimeMillis();
Notification notification = new Notification(icon , tickerText , when );
notification.flags = Notification.FLAG_AUTO_CANCEL; CharSequence contentText = "show:"+random.nextInt(30);
Intent intent = new Intent();
intent.setAction(Intent.ACTION_WEB_SEARCH);
intent.setData(Uri.parse("http://www.baidu.com"));
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, intent , 0);
notification.setLatestEventInfo(this, getTitle(), contentText , contentIntent ); notificationManger.notify(0, notification ); } }
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