သတိ​ေပးခ်က္​ တစ္​ခု ဖန္​တီးျခင္​း သင္​ခန္​းစာ

main.xml
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<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">

    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/idBtn"
        android:background="#FFCC65"
        android:text="Click" />
</RelativeLayout>

MainActivity.java
@@@@@@@@@@

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

public class MainActivity extends Activity {

    Button btn;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        btn = (Button) findViewById(R.id.idBtn);
        btn.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
     ClickMe();
    }
   });
    }

    private void ClickMe() {
     
        NotificationCompat.Builder mBuilder =
   (NotificationCompat.Builder) new NotificationCompat.Builder(this)
   .setSmallIcon(R.drawable.ic_launcher)
   .setContentTitle("BMMA Lessons For Android")
   .setContentText("This is test of simple notification.");
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0, mBuilder.build());
    }
}

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This is BMMA Lessons For Android