my first login system

MainActivity.java
======================
package com.example.z.myapplication;

import android.app.Activity;
import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends Activity {

    EditText txtUserName;
    EditText txtUserPass;
    TextView lblMsg;
    final String MY_USER="zeev";
    final String MY_PASS="12345";
    private int totalTry=5;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        setPointer();
    }

    private void setPointer()
    {
        txtUserName=(EditText)findViewById(R.id.txtUserName);
        txtUserPass=(EditText)findViewById(R.id.txtUserPassword);
        lblMsg=(TextView)findViewById(R.id.lblMsg);
    }

    public void btnClick(View view)
    {
        String getUser=txtUserName.getText().toString();
        String getPass=txtUserPass.getText().toString();

        if (totalTry==0) {
            Toast.makeText(MainActivity.this, "You are an idiot!!", Toast.LENGTH_SHORT).show();
            return;
        }

        if (getUser.equals(MY_USER) && getPass.equals(MY_PASS))
        {
            lblMsg.setText("User loged...");
        }
        else
        {
            totalTry--;
            Toast.makeText(MainActivity.this, "you have "+totalTry+" times", Toast.LENGTH_LONG).show();

        }
    }

}


activity_main.xml
=================
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="vertical">

        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="LOGO"
            android:textSize="100sp">

        </TextView>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="150dp"
        android:orientation="vertical">

        <EditText
            android:id="@+id/txtUserName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Enter your name...."
            android:inputType="text"
            android:textSize="22sp" />

        <EditText
            android:id="@+id/txtUserPassword"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Enter Password..."
            android:inputType="textPassword"
            android:textSize="22sp" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:orientation="vertical">

        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Login"
            android:background="#91E0FF"
            android:textColor="#ffffff"
            android:textSize="32sp"
            android:onClick="btnClick"/>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">
    <TextView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:textSize="32sp"
        android:text="MY LOGIN SYSTEM V1"
        android:gravity="center"
        android:id="@+id/lblMsg"/>
    </LinearLayout>
</LinearLayout>