l通过一个按钮点击，然后在在通知栏显示通知信息；

package cn.core.test;import android.app.Activity;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;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 button1 = null, button2 = null;    private NotificationManager mNotificationManager = null;                 @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        button1 = (Button) findViewById(R.id.button1);        button1.setOnClickListener(this);                button2 = (Button) findViewById(R.id.button2);        button2.setOnClickListener(this);    }    @Override    public void onClick(View v) {        if(v==button1)        {//            Notification mNotification = new Notification();//            mNotification.icon=;//            mNotification.tickerText=;//            mNotification.when=;//                                    Notification mNotification = new Notification(                    android.R.drawable.presence_online, "通知",                    System.currentTimeMillis());                mNotification.defaults = Notification.DEFAULT_VIBRATE;                Intent intent = new Intent(MainActivity.this, Activity01.class);                PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,                    intent, 0);                mNotification.setLatestEventInfo(this, "开会通知11", "通知您下午17:60分在卫生间开会",                    pendingIntent);                mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);                mNotificationManager.notify(11111, mNotification);        }        else if(v==button2)        {            mNotificationManager.cancelAll();                    }                                                            }}