[Android] Bài 60: Notification là gì và quan trọng thế nào ?

nhận gửi thông báo đúng lúc
thì bài này hiểu sơ sơ về nó trước đã.. qua bài sau xử lý từ php server tao ra 1 body gửi vào máy các client sử dụng app..

cũng ko có gì nhiều
new project
activity_main.xml

HTML:

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

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Notification"
        android:id="@+id/textView"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:textSize="30dp" />
    .
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="BB SINBAD"
        android:id="@+id/textView2"
        android:layout_below="@+id/textView"
        android:layout_centerHorizontal="true"
        android:textSize="35dp"
        android:textColor="#ff16ff01" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/editText"
        android:layout_below="@+id/textView2"
        android:layout_alignLeft="@+id/textView2"
        android:layout_alignStart="@+id/textView2"
        android:layout_marginTop="52dp"
        android:layout_alignRight="@+id/textView2"
        android:layout_alignEnd="@+id/textView2"
        android:hint="Name" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/editText2"
        android:hint="Subject"
        android:layout_below="@+id/editText"
        android:layout_alignLeft="@+id/editText"
        android:layout_alignStart="@+id/editText"
        android:layout_alignRight="@+id/editText"
        android:layout_alignEnd="@+id/editText" />

    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:inputType="textPersonName"
        android:ems="10"
        android:id="@+id/editText3"
        android:hint="Body"
        android:layout_below="@+id/editText2"
        android:layout_alignLeft="@+id/editText2"
        android:layout_alignStart="@+id/editText2"
        android:layout_alignRight="@+id/editText2"
        android:layout_alignEnd="@+id/editText2" />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Notification"
        android:id="@+id/button"
        android:layout_marginTop="77dp"
        android:layout_below="@+id/editText3"
        android:layout_alignRight="@+id/textView"
        android:layout_alignEnd="@+id/textView" />

</RelativeLayout>

MainActivity.java

HTML:

package com.example.hieuhuynh.notifcationbai1;

import android.app.Notification;
import android.app.NotificationManager;
import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class MainActivity extends AppCompatActivity {
    EditText ed1,ed2,ed3;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ed1=(EditText)findViewById(R.id.editText);
        ed2=(EditText)findViewById(R.id.editText2);
        ed3=(EditText)findViewById(R.id.editText3);
        Button b1=(Button)findViewById(R.id.button);
        b1.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String tittle=ed1.getText().toString().trim();
                String subject=ed2.getText().toString().trim();
                String body=ed3.getText().toString().trim();

                NotificationManager notif=(NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE);
                Notification notify=new Notification.Builder
                        (getApplicationContext()).setContentTitle(tittle).setContentText(body).
                        setContentTitle(subject).setSmallIcon(R.drawable.ic_launcher_background).build();

                notify.flags |= Notification.FLAG_AUTO_CANCEL;
                notif.notify(0, notify);
            }
        });
    }
}