Android 消息通知栏用法

概述activity_main.xml<?xmlversion="1.0"encoding="utf-8"?><LinearLayoutxmlns:android="http://schemas.android.com/apkes/android"xmlns:tools="http://schemas.android.comools"android:layout_width=

activity_main.xml

<?xml version="1.0" enCoding="utf-8"?><linearLayout 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:orIEntation="vertical"    tools:context=".MainActivity">    <!--Toast按键布局-->    <button        androID:ID="@+ID/createNotify"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_gravity="center"        androID:text="创建消息" />    <button        androID:ID="@+ID/deleteNotify"        androID:layout_wIDth="wrap_content"        androID:layout_height="wrap_content"        androID:layout_gravity="center"        androID:text="删除消息" /></linearLayout>

MainActivity

package com.example.toastnotificationdemo;import androID.app.Notification;import androID.app.NotificationChannel;import androID.app.notificationmanager;import androID.graphics.BitmapFactory;import androID.os.Build;import androID.os.Bundle;import androID.vIEw.VIEw;import androID.Widget.button;import androID.Widget.Toast;import androIDx.appcompat.app.AppCompatActivity;import androIDx.core.app.NotificationCompat;public class MainActivity extends AppCompatActivity {    private static final int NOTIFICATION_ID = 1;    String ID = "channelID";    @OverrIDe    protected voID onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentVIEw(R.layout.activity_main);        //获取控件        button createNotify = findVIEwByID(R.ID.createNotify);        button deleteNotify = findVIEwByID(R.ID.deleteNotify);        createNotify.setonClickListener(new VIEw.OnClickListener() {            public voID onClick(VIEw v) {                Toast.makeText(MainActivity.this, "创建消息", Toast.LENGTH_SHORT).show();                Notification notification;                notificationmanager manager = (notificationmanager) getSystemService(NOTIFICATION_SERVICE);                //API>=26 (androID 8.0)                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {                    String name = "channelname";                    NotificationChannel channel = new NotificationChannel(ID, name, notificationmanager.importANCE_HIGH);                    manager.createNotificationChannel(channel);                    notification = new NotificationCompat.Builder(MainActivity.this, ID)                            .setChannelID(ID)//通道ID                            .setContentTitle("Notification的标题测试")//设置Notification在状态栏中的标题                            .setContentText("Notification的内容测试")//设置Notification在状态栏中的内容                            .setWhen(System.currentTimeMillis())//设置Notification启动时间                            .setSmallicon(R.drawable.sms)//设置Notification的在状态栏中的图标                            .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))//消息大图标                            .build();                } else {                    notification = new NotificationCompat.Builder(MainActivity.this, ID)                            .setContentTitle("Notification的标题测试")//设置Notification在状态栏中的标题                            .setContentText("Notification的内容测试")//设置Notification在状态栏中的内容                            .setWhen(System.currentTimeMillis())//设置Notification启动时间                            .setSmallicon(R.drawable.sms)//设置Notification的在状态栏中的图标                            .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher))                            .build();                }                // 发送Notification消息                manager.notify(1, notification);            }        });        deleteNotify.setonClickListener(new VIEw.OnClickListener() {            public voID onClick(VIEw v) {                Toast.makeText(MainActivity.this, "删除消息", Toast.LENGTH_SHORT).show();                //获取系统的Notification服务                notificationmanager notificationmanager = (notificationmanager) getSystemService(NOTIFICATION_SERVICE);                //取消通知                notificationmanager.cancel(NOTIFICATION_ID);            }        });    }}

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