Android如何使用Notification进行通知

有两张图片素材会放在末尾

activity代码，和XML布局

package com.example.myapplication;import androidx.appcompat.app.AppCompatActivity;import androidx.core.app.NotificationCompat;import android.app.Notification;import android.app.NotificationChannel;import android.app.NotificationManager;import android.app.PendingIntent;import android.content.Context;import android.content.Intent;import android.graphics.BitmapFactory;import android.graphics.Color;import android.os.Bundle;import android.view.View;import android.widget.ImageView;public class NotificationActivity extends AppCompatActivity {    public static NotificationManager notificationManager;    public static String CHANNEL_1 = "channel1";    Notification notification;    ImageView iv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_notification);        iv = findViewById(R.id.iv);        iv.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                iv.setImageResource(R.drawable.aoligei);                notificationManager = (NotificationManager) NotificationActivity.this.getSystemService(Context.NOTIFICATION_SERVICE);                //android 8.0有通知渠道，如果不设置的话，会报错                if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {                    配置通知渠道id,渠道名称（用户可以看到），渠道优先级                    NotificationChannel channel1 = new NotificationChannel(CHANNEL_1, "通知渠道1", NotificationManager.IMPORTANCE_HIGH);                    channel1.setDescription("通知渠道的描述1");                    ///配置通知出现时的闪灯（如果 android 设备支持的话）                    channel1.enableLights(true);                    channel1.setLightColor(Color.WHITE);                    //配置通知出现时的震动（如果 android 设备支持的话）                    channel1.enableVibration(true);                    channel1.setVibrationPattern(new long[]{100, 200, 100, 200});                    //channel.setBypassDnd(true); //设置绕过免打扰模式                    //channel.canBypassDnd(); //检测是否绕过免打扰模式                    //channel.setLockscreenVisibility(Notification.VISIBILITY_SECRET);//设置在锁屏界面上显示这条通知                    notificationManager.createNotificationChannel(channel1);//                    NotificationChannel channel = new NotificationChannel("id", "name", NotificationManager.IMPORTANCE_HIGH);//                    channel.setShowBadge(true);//                    NotificationManager notificationManager = (NotificationManager) getSystemService(//                            NOTIFICATION_SERVICE);//                    notificationManager.createNotificationChannel(channel);                }                //普通的通知//                sendChatMsg();                //可以点击的通知                preIntent();            }            });        }    public void sendChatMsg() {        NotificationManager manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);        Notification notification = new NotificationCompat.Builder(this, CHANNEL_1)                .setContentTitle("收到一条聊天消息")                .setContentText("老八问候你吃了吗")                .setWhen(System.currentTimeMillis())                .setSmallIcon(R.drawable.ic_launcher_background)                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher_background))                .setAutoCancel(true)                .setNumber(2)                .build();//        for (int i = 0; i < 3; i++) {            manager.notify(1, notification);//        }    }    public void preIntent(){        NotificationManager manager1 = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);        //创建一个可以点击的通知        //通知的需要跳转，创建Intent        Intent intent = new Intent(NotificationActivity.this, NotificationActivity.class);        //需要创建PendingIntent进行        PendingIntent pendingIntent = PendingIntent.getActivity(NotificationActivity.this, 0, intent, 0);        //创建notification        notification = new Notification.Builder(NotificationActivity.this,CHANNEL_1).//第二个参数需要保持一致                setContentTitle("这是一个通知") .setContentText("快来和老八一起共进晚餐") .                setWhen(System.currentTimeMillis()) .                setSmallIcon(R.mipmap.ic_launcher) .                setLargeIcon(BitmapFactory.decodeResource(  getResources(), R.mipmap.ic_launcher)) .                setContentIntent(pendingIntent).                build();        //。build就是创建的意思        //这个id是随便起的名字，只要id不同可以多个显示，如果id相同，会显示玩当前id的通知才会显示下一个id                manager1.notify(0x11, notification);    }}

XML布局

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".NotificationActivity"><ImageView    android:id="@+id/iv"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:src="@drawable/haha"    /><!--    android:adjustViewBounds="true"--><!--    android:scaleType="fitXY"--></LinearLayout>

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