[android] 01_Notification用户提醒 - Android 4.0 Documentation

1、PendingIntent继承Parctable，是可以在进程之间之间通信的，notification显示在systemui上的。
2、FLAG_NO_CLEAR，通知不可被清除，流氓软件，作死的弹，
可以在应用管理，强行关闭该程序，就会消失了，android4.0新特性，显示通知，

去掉，该程序就再也不能弹出来了

The callouts in the illustration refer to the following:

Content title 内容标题
Large icon 大图标
Content text 内容文本
Content info 内容信息
Small icon 小图标
Time that the notification was issued. You can set an explicit value with setWhen(); if you don't it defaults to the time that the system received the notification. 显示时间

核心代码：



import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
 
public class MainActivity extends Activity {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
 
    /**
     * 单击弹出提醒
     * @param view
     */
    @SuppressLint("NewApi")
    public void notify(View view) {
 
        // 1.获取一个notification的管理器
        NotificationManager notificationManager = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
 
        // TODO 1、android api11 以上可以用 。链式调用，因为返回的都是Builder
        /*Notification noti = new Notification.Builder(getApplicationContext())
                .setContentTitle("我是标题信息")
                .setContentText("我是内容信息")
                .setSmallIcon(R.drawable.notification)//如果没有指定大的，小的会自动移动到大的图标上去
                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher))
                .build();
 
        notificationManager.notify(0, noti);// 如果id相同，新来的提醒会覆盖原来的提醒*/
 
        // TODO 2、过时的写法，更好的兼容前面的版本
        Notification notification = new Notification(R.drawable.notification,"我是滚动提醒内容", System.currentTimeMillis());
 
        // notification.flags = Notification.FLAG_AUTO_CANCEL;// 自动取消当用户点击了它
        notification.flags = Notification.FLAG_NO_CLEAR;// 不会消失
 
        // 设置notification的具体信息 延期的意图 让另外一个应用程序 执行的意图
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_DIAL);
        intent.setData(Uri.parse("tel:110"));
        PendingIntent contentIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
        notification.setLatestEventInfo(this, "我是标题信息", "我是内容信息", contentIntent);
        notificationManager.notify(0, notification);
    }
}

结果：
新api：

老api:

package cn.zengfansheng.day10.notification;

import android.annotation.SuppressLint;

import android.app.Activity;

import android.app.Notification;

import android.app.NotificationManager;

import android.app.PendingIntent;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

import android.os.Bundle;

import android.view.View;

import cn.zengfansheng.day10.R;

public class NotificationActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_notification);

}

@SuppressLint("NewApi")

// @SuppressWarnings("deprecation")

public void notification(View view) {

NotificationManager nManager = (NotificationManager) this

.getSystemService(NOTIFICATION_SERVICE);

Bitmap aBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.notification);

Notification notification = new Notification.Builder(this)

.setContentTitle("content title") //contentTitle

.setContentText("content text") //contentText

.setSmallIcon(R.drawable.ic_launcher) // 小图标

.setLargeIcon(aBitmap) // 大图标

.build();

Intent intent = new Intent();

intent.setAction(Intent.ACTION_DIAL);

intent.setData(Uri.parse("tel:" + 110));

PendingIntent contentIntent = PendingIntent.getActivity(this, 1, intent, PendingIntent.FLAG_UPDATE_CURRENT);

//

notification.contentIntent = contentIntent;// 该提醒被点击时，执行的intent

notification.tickerText = "qq邮件来了";// 状态栏滚动的文本

notification.flags = Notification.FLAG_AUTO_CANCEL;// 点击后，该提醒自动消失了

// NOTES==================== 过时的写法,兼容旧版本==============

// Notification notification = new Notification(R.drawable.notification,

// "我是滚动提醒内容", System.currentTimeMillis());// 状态栏图标,状态栏提示内容，显示的时间

//

// CharSequence contentTitle = "内容标题"; // 内容标题

// CharSequence contentText = "内容文本"; // 内容文本

//

// // 点击时打开的意图

// Intent intent = new Intent();

// intent.setAction(Intent.ACTION_DIAL);

// intent.setData(Uri.parse("tel:" + 110));

//

// int flags = PendingIntent.FLAG_UPDATE_CURRENT;

// PendingIntent contentIntent = PendingIntent.getActivity(this, 1, intent, flags);

//

// notification.setLatestEventInfo(this, contentTitle, contentText, contentIntent);

nManager.notify(null, 0, notification);

}

结果：

①状态栏

②下拉菜单中