安卓——Notification通知栏通知

谁践踏了优雅 2022-05-29 12:26 226阅读 0赞

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很奇怪，我在虚拟机上运行不了，可是代码并没有报错

activity\_main.xml

<?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="com.example.lenovo.notifictiondemo.MainActivity">
    
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            >
    
            <Button
                android:id="@+id/btn_send"
                android:text="发送通知"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                />
            <Button
                android:id="@+id/btn_cancle"
                android:text="取消通知"
                android:layout_width="match_parent"
                android:layout_height="wrap_content" />
    
        </LinearLayout>
    
    </LinearLayout>

MainActivity.java

package com.example.lenovo.notifictiondemo;
    
    import android.app.Activity;
    import android.app.Notification;
    import android.app.Notification.Builder;
    import android.app.NotificationManager;
    import android.app.PendingIntent;
    import android.content.Context;
    import android.content.Intent;
    import android.os.Bundle;
    import android.view.View;
    import android.view.View.OnClickListener;
    
    public class MainActivity extends Activity implements OnClickListener{
        NotificationManager manager;//通知控制类
        int notification_ID;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            findViewById(R.id.btn_send).setOnClickListener(this);
            findViewById(R.id.btn_cancle).setOnClickListener(this);
    
        }
    
        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            switch (v.getId()) {
                case R.id.btn_send:
                    sendNotification();
                    break;
                case R.id.btn_cancle:
                    manager.cancel(notification_ID);
                    break;
            }
        }
        /**
         * 构造notification并发送到通知栏
         */
        private void sendNotification(){
            Intent intent = new Intent(this,MainActivity.class);
            PendingIntent pintent = PendingIntent.getActivity(this, 0, intent, 0);
            Builder builder = new Notification.Builder(this);
            builder.setSmallIcon(R.mipmap.ic_launcher);//设置图标
            builder.setTicker("hello");//手机状态栏的提示；
            builder.setWhen(System.currentTimeMillis());//设置时间
            builder.setContentTitle("通知栏通知");//设置标题
            builder.setContentText("我来自NotificationDemo");//设置通知内容
            builder.setContentIntent(pintent);//点击后的意图
    //		builder.setDefaults(Notification.DEFAULT_SOUND);//设置提示声音
    //		builder.setDefaults(Notification.DEFAULT_LIGHTS);//设置指示灯
    //		builder.setDefaults(Notification.DEFAULT_VIBRATE);//设置震动
           // builder.setDefaults(Notification.DEFAULT_ALL);//设置震动
            Notification notification = builder.getNotification();//4.1以上
            //builder.getNotification();
            manager.notify(notification_ID, notification);
        }
    }

[70]: /images/20220529/0765635a272540febede98095f64c59e.png
[70 1]: /images/20220529/49f573dc2bf04ec49b18ebbd936050d7.png
[70 2]: /images/20220529/a69297aea6164e57a409cab8ddb15b7b.png
[70 3]: /images/20220529/204b50a606544d68bbdba9548fc8cafb.png