2.13 Notification(通知)的使用

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一、布局文件

activity_main.xml 添加代码：

<?xml version="1.0" encoding="utf-8"?><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:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity">   <Button       android:id="@+id/btn_show_normal"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="发送通知"       />    <Button        android:id="@+id/btn_close_normal"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="关闭通知"        android:layout_marginTop="50dp"        /></RelativeLayout>

二、Java代码

1、新建一个Activity，命名为OtherActivity；

2、MianActivity添加如下代码：

package com.example.yuancan.test101902;import android.app.Notification;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private Context mContext;    private NotificationManager mNManager;    private Notification notify1;    Bitmap LargeBitmap = null;    private static final  int NOTIFYLID_1 = 1;    private Button btn_show_normal;    private Button btn_close_normal;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mContext = MainActivity.this;        LargeBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.avator_smaller);        mNManager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);        bindView();    }    private void bindView() {        btn_show_normal = (Button)findViewById(R.id.btn_show_normal);        btn_close_normal = (Button)findViewById(R.id.btn_close_normal);        btn_show_normal.setOnClickListener(this);        btn_close_normal.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.btn_show_normal:                //定义一个pendingIntent,点击Notification后启动一个Activity                Intent it = new Intent(mContext, OtherActivity.class);                PendingIntent pit = PendingIntent.getActivity(mContext, 0, it, 0);                //设置图片，通知标题，发送时间，提示方式等                Notification.Builder mBuilder = new Notification.Builder(this);                mBuilder.setContentTitle("您有一条新的通知")                        .setContentText("请不要忘记打卡")                        .setSubText("上下班请记得打卡")                        .setTicker("收到信息")                        .setWhen(System.currentTimeMillis())                        .setSmallIcon(R.mipmap.ic_launcher)                        .setLargeIcon(LargeBitmap)                        .setDefaults(Notification.DEFAULT_LIGHTS|Notification.DEFAULT_VIBRATE)                        .setAutoCancel(true)                        .setContentIntent(pit);                notify1 = mBuilder.build();                mNManager.notify(NOTIFYLID_1, notify1);                break;            case R.id.btn_close_normal:                mNManager.cancel(NOTIFYLID_1);                break;        }    }}

这里写图片描述

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