Android Notification.Builder通知案例分享

package com.example.day6ke;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Context;
import android.content.Intent;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
  private Button btn;
  private NotificationManager Manager;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    btn= (Button) findViewById(R.id.bnt);

    Manager= (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    btn.setOnClickListener(new View.OnClickListener() {
      @RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
      @Override
      public void onClick(View v) {
        Notification.Builder builder=new Notification.Builder(MainActivity.this);
        builder.setContentTitle("通知");
        builder.setContentText("正文");
        builder.setSmallIcon(R.mipmap.ic_launcher);


        //的到PendingIntent（延迟意图）的对象
        PendingIntent pendingIntent =PendingIntent.getActivity(MainActivity.this, 2020,new Intent(MainActivity.this, Main2Activity.class), PendingIntent.FLAG_ONE_SHOT);
        builder.setContentIntent(pendingIntent);
        //点击通知是否消失   该方法与PendingIntent 一起使用才有效果
        builder.setAutoCancel(true);
        Manager.notify(1,builder.build());
      }
    });
  }
}