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());      }    });  }}