package com.example.lession16_notifi;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.res.Resources.NotFoundException;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;
public class MainActivity extends Activity {
  private NotificationManager notificationManager;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    // 第一步：通过getSystemService（）方法得到NotificationManager对象；
    notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
  }
  // 测试
  public void test1(View v) {
    showNotification("来短信了", "5557", "hello！", R.drawable.ic_launcher,
        R.drawable.ic_launcher);
  }
  // 第二步：对Notification的一些属性进行设置比如：内容，图标，标题，相应notification的动作进行处理等等；
  public void showNotification(String tickerText, String contentTitle,
      String contentText, int iconId, int notiId) {
    // 创建一个Notification
    Notification notification = new Notification();
    // 设置通知 消息 图标
    notification.icon = iconId;
    // 设置发出消息的内容
    notification.tickerText = tickerText;
    // 设置发出通知的时间
    notification.when = System.currentTimeMillis();
    // 设置显示通知时的默认的发声、振动、Light效果
    notification.defaults = Notification.DEFAULT_VIBRATE;// 振动
    // Notification notification = new Notification(R.drawable.ic_launcher,"有新的消息", System.currentTimeMillis());
    // 3步：PendingIntent android系统负责维护
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,getIntent(), 0);
    // 4步：设置更加详细的信息
    notification.setLatestEventInfo(this, contentTitle, contentText,pendingIntent);
    // 5步：使用notificationManager对象的notify方法 显示Notification消息 需要制定
    // Notification的标识
    notificationManager.notify(notiId, notification);
  }
  // 6步:使用notificationManager对象的cancelAll()方法取消
  public void clearNoti(View v) {
    notificationManager.cancelAll();// 清除所有
  }
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  xmlns:tools="http://schemas.android.com/tools"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  android:paddingBottom="@dimen/activity_vertical_margin"
  android:paddingLeft="@dimen/activity_horizontal_margin"
  android:paddingRight="@dimen/activity_horizontal_margin"
  android:paddingTop="@dimen/activity_vertical_margin"
  tools:context=".MainActivity" >
  <Button
    android:id="@+id/button1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentLeft="true"
    android:layout_alignParentRight="true"
    android:layout_alignParentTop="true"
    android:layout_marginTop="22dp"
    android:onClick="test1"
    android:text="@string/text_notifi" />
  <Button
    android:id="@+id/button2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignLeft="@+id/button1"
    android:layout_below="@+id/button1"
    android:layout_marginTop="60dp"
    android:onClick="clearNoti"
    android:text="@string/text_clear" />
</RelativeLayout>