Notification 通知栏通知的实现

package com.example.administrator.notification;

import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.Intent;
import android.os.Build;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;


public class MainActivity extends ActionBarActivity implements Button.OnClickListener{
    private Button btn_send;
    private Button btn_cancel;

    private NotificationManager manager;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        btn_send = (Button)findViewById(R.id.btn_send);
        btn_cancel = (Button)findViewById(R.id.btn_cancel);

        btn_send.setOnClickListener(this);
        btn_cancel.setOnClickListener(this);

        manager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
           case  R.id.btn_send:
               Intent intent = new Intent(MainActivity.this,MainActivity.class);
               PendingIntent pending = PendingIntent.getActivity(this,0,intent,0);

               Notification.Builder build = new Notification.Builder(MainActivity.this);
               build.setSmallIcon(R.mipmap.ic_launcher);
               build.setTicker("i'm trcker"); //标题栏提示 一般和 contentTilte一致
               build.setWhen(System.currentTimeMillis());
               build.setContentTitle("i'm title"); //通知栏标题
               build.setContentText("i'm text"); //通知栏内容
//               build.setContentInfo("i'm info");
               build.setContentIntent(pending);

               //需要权限如下
               //////               build.setDefaults(Notification.DEFAULT_SOUND); //声音
//               build.setDefaults(Notification.DEFAULT_LIGHTS); //指示灯
//               build.setDefaults(Notification.DEFAULT_VIBRATE); //震动

               build.setDefaults(Notification.DEFAULT_ALL);
               Notification notification = build.getNotification();

               manager.notify(110, notification);
//               Toast.makeText(MainActivity.this,"send",Toast.LENGTH_LONG).show();
               break;
            case  R.id.btn_cancel:
                manager.cancel(110);
                break;
        }
    }
}