通知栏的简单通知

首先随意扔两个按钮

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="send"
        />

    <Button
        android:id="@+id/button2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="cencle"
        />

</LinearLayout>

然后去设置主文件

package com.example.deemo;

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(为了取消)
    int notification_ID;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);//获取系统服务(为了取消)
        findViewById(R.id.button1).setOnClickListener(this);
        findViewById(R.id.button2).setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {//点击事件
        switch (v.getId()) {
        case R.id.button1:
            sendNotification();
            break;

        case R.id.button2:
            manager.cancel(notification_ID);//要取消的id
            break;
        }
    }
    /**
     *
     */
    private void sendNotification(){//发送方法
        Intent intents = new Intent(this,MainActivity.class); //构造转跳
        PendingIntent pintent = PendingIntent.getActivity(this, 0, intents, 0);//即将转跳,非及时
        Builder builder = new Notification.Builder(this);
        builder.setSmallIcon(R.drawable.ic_launcher);//设置图标
        builder.setTicker("嘿嘿嘿");//手机状态栏提示
        builder.setWhen(System.currentTimeMillis());//设置时间
        builder.setContentTitle("我是一个标题");
        builder.setContentText("我是一个通知内容");
        builder.setContentIntent(pintent);//点击后的意图
        builder.setDefaults(Notification.DEFAULT_LIGHTS);//设置指示灯
        builder.setDefaults(Notification.DEFAULT_SOUND);//设置提示声音
        builder.setDefaults(Notification.DEFAULT_VIBRATE);//设置震动
        Notification notification = builder.build();//4.1以上
        //4.1以下用builder.getNotification();

        manager.notify(notification_ID,notification);//取消,id为对应notification的id
    }

}

比如震动，提示灯要用系统权限，

android.permission.FLASHLIGHT

android.permission.VIBRATE

记得在AndroidManifest设置