my login app

//strings
-------------------
<resources>
    <string name="app_name">MyLogin</string>
    <string name="myLogo">LOGO</string>
    <string name="hintUserName">Enter user name...</string>
    <string name="hintPassword">Enter user password...</string>
    <string name="hintChecked">password checked</string>
    <string name="btnLogin">Login</string>
    <string name="msgLogo">Hello Esra !!!</string>
    <string name="newUser">New User</string>
    <string name="btnRegister">Register</string>
    <string name="btnCanel">Cancel</string>
</resources>
----------------------------
//logInActivity
---------------------------
package com.example.android.loginapp;

        import android.content.Context;
        import android.content.Intent;
        import android.graphics.Color;
        import android.support.v7.app.AppCompatActivity;
        import android.os.Bundle;
        import android.util.Log;
        import android.view.View;
        import android.widget.Button;
        import android.widget.EditText;
        import android.widget.TextView;
        import android.widget.Toast;

public class LoginActivity extends AppCompatActivity {

    final String TAG="LoginScreen";

    EditText txtUser,txtPass;
    Button btnLogin;
    TextView txtLogo;
    final String USER_NAME="Esra",USER_PASS="12345";
    Context context;

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

    private void setPointer()
    {
        this.context=this;
        txtUser=(EditText) findViewById(R.id.txtUser);
        txtPass=(EditText)findViewById(R.id.txtPass);
        txtLogo=(TextView)findViewById(R.id.txtLogo);
        txtLogo.setOnLongClickListener(new View.OnLongClickListener() {
            @Override
            public boolean onLongClick(View v) {
                Toast.makeText(context, context.getResources().getString(R.string.msgLogo), Toast.LENGTH_SHORT).show();
                return true;
            }
        });

        final int orgHintColor=txtLogo.getCurrentHintTextColor();
        btnLogin=(Button)findViewById(R.id.btnLogin);
        btnLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View roni) {
                String userName=txtUser.getText().toString();
                String userPass=txtPass.getText().toString();
                //validation for user name
                if (userName.length()<1)
                {
                    txtUser.setText("");
                    txtUser.setHintTextColor(Color.RED);
                    return;
                }
                if (userPass.length()<1)
                {
                    txtPass.setText("");
                    txtPass.setHintTextColor(Color.RED);
                    return;
                }
                //check user
                if (Utl.checkUser(userName,userPass,USER_NAME,USER_PASS))
                {
                    //user is correct -true
                    /*
                    Toast.makeText(context, "Hello my Master", Toast.LENGTH_SHORT).show();
                    txtPass.setText("");
                    txtPass.setHintTextColor(orgHintColor);
                    txtUser.setText("");
                    txtUser.setHintTextColor(orgHintColor);
                    */
                    //move now to second screen - which is our main screen
                    Intent myIntent = new Intent(context,TaskActivity.class);
                    myIntent.putExtra("userName",USER_NAME);
                    startActivity(myIntent);
                    finish();
                    Log.i(TAG, "onClick: User OK");
                }
                else
                {
                    //user is incorrect -false
                    txtPass.setText("");
                    Toast.makeText(context, "You are not allowed!!", Toast.LENGTH_LONG).show();
                    Log.e(TAG, "onClick: Incorrect User" );
                }
            }
        });
    }
}
------------------
//registerActivity
------------------
package com.example.android.loginapp;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.Button;
import android.widget.EditText;

public class RegisterActivity extends AppCompatActivity {
        EditText txtUser,txtPass,txtCheckPass;
        Button btnReg,btnCancel;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);
        setPointer();
    }
    private void setPointer()
    {
        txtUser=(EditText)findViewById(R.id.txtUserReg);
        txtPass=(EditText)findViewById(R.id.txtPassReg);
        txtCheckPass=(EditText)findViewById(R.id.txtCheckPass);
        btnReg=(Button)findViewById(R.id.btnReg);
        btnCancel=(Button)findViewById(R.id.btnCancel);
    }
}
-----------------------
//taskActivity
-----------------------
package com.example.android.loginapp;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class TaskActivity extends AppCompatActivity {

    TaskActivity context;
    TextView txtLogo;
    boolean isBackPressed=false;

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

    private void setPointer()
    {
        this.context=this;
        txtLogo=(TextView)findViewById(R.id.txtHello);
    }

    private void getExtra()
    {
        String myData = getIntent().getStringExtra("userName");
        txtLogo.setText("Hello "+myData);
        Toast.makeText(context, "user "+myData+" is loged in...", Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onBackPressed() {
        if (!isBackPressed)
        {
            isBackPressed=true;
            Toast.makeText(context, "Press again to exit", Toast.LENGTH_SHORT).show();
        }
        else
        {
            finish();
        }
    }
    }

-------------------------------
//Utl
--------------------------
package com.example.android.loginapp;

/**
 * Created by Android on 09/01/2017.
 */

public class Utl {

    public static boolean checkUser(String userName, String userPass, String myUser, String myPass) {
        return (userName.equals(myUser) && userPass.equals(myPass));
    }

}
------------------------------------
//UtlShared
---------------------------------------
package com.example.android.loginapp;

import android.content.SharedPreferences;

/**
 * Created by Android on 09/01/2017.
 */

public class UtlShared {
    SharedPreferences userPref;
    SharedPreferences.Editor editor;
    publi
}
--------------------------------
//activity_login
----------------------------
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <!-- my logo layout -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:layout_weight="1"
        >
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="@string/myLogo"
            android:textSize="90sp"
            android:gravity="center"
            android:id="@+id/txtLogo"
            />
    </LinearLayout>

    <!-- my Edit text box -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:layout_weight="1">
        <EditText
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:hint="@string/hintUserName"
            android:textSize="25sp"
            android:layout_weight="1"
            android:id="@+id/txtUser"/>
        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="5px"
            android:orientation="vertical"
            android:background="#000"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:hint="@string/hintPassword"
            android:textSize="25sp"
            android:inputType="numberPassword"
            android:layout_weight="1"
            android:id="@+id/txtPass"
            />

    </LinearLayout>

    <!-- my Login Button -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:layout_weight="1">
        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="#009fff"
            android:textColor="#ffffff"
            android:text="@string/btnLogin"
            android:textSize="26sp"
            android:id="@+id/btnLogin"/>
    </LinearLayout>
</LinearLayout>
---------------------------------
//activity_register
--------------------------------
<LinearLayout android:orientation="vertical"
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <LinearLayout
        android:layout_height="match_parent"
        android:layout_width="match_parent"
        android:orientation="vertical"
        android:layout_weight="1">
        <TextView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:text="@string/newUser"
            android:textSize="@dimen/regttl"
            android:gravity="center"
            />
     </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="vertical">
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="@string/hintUserName"
            android:textSize="@dimen/regEditText"
            android:id="@+id/txtUserReg"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="@string/hintPassword"
            android:textSize="@dimen/regEditText"
            android:id="@+id/txtPassReg"/>
        <EditText
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:hint="@string/hintChecked"
            android:textSize="@dimen/regEditText"
            android:id="@+id/txtCheckPass"/>
    </LinearLayout>
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_weight="1"
        android:orientation="horizontal"
        android:layout_gravity="center">
        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@color/btnbg"
            android:textColor="@color/btnText"
            android:text="@string/btnRegister"
            android:layout_margin="@dimen/btnMargin"
            android:id="@+id/btnReg"/>
        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:background="@color/btnbg"
            android:textColor="@color/btnText"
            android:text="@string/btnCanel"
            android:layout_margin="@dimen/btnMargin"
            android:id="@+id/btnCancel"/>
    </LinearLayout>
</LinearLayout>
--------------------------------
//activity_task
-----------------------------
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="32sp"
        android:text="place holder"
        android:gravity="center"
        android:layout_marginTop="15dp"
        android:id="@+id/txtHello"/>

</LinearLayout>
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