Password field in Android

Wish to have a Password field in your Android app? You can use “android.widget.EditText“, with inputType="textPassword" to accomplish the task. In this tutorial, we shall learn how to use XML to create a password field, a label field and a normal button. When the button is clicked, the password value will be displayed as a toast message on the screen.

1. Strings.xml file

Open the "strings.xml” file, and add some custom strings.

File : res/values/strings.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

<string name="app_name">MyApp</string>

<string name="lblPassword">Enter Your Password :</string>

<string name="btn_submit">Submit</string>   

</resources>

2. Add the Password field

Open the layout file "main.xml" and add a password component using the EditText field and marking the inputType as "textPassword".

File : res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >



<TextView android:id="@+id/lblPassword"

          android:layout_width="wrap_content"

          android:layout_height="wrap_content"

          android:text="@string/lblPassword"

          android:textAppearance="?android:attr/textAppearanceLarge" />



<EditText android:id="@+id/txtPassword"

          android:layout_width="match_parent"

          android:layout_height="wrap_content"

          android:background="#EECCFF"

          android:inputType="textPassword" >

<requestFocus />

</EditText>



<Button android:id="@+id/btnSubmit"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="@string/btn_submit" />

</LinearLayout>

3. Java Code

Inside the activity “onCreate()” method, attach a click listener on button, to display the password value when it is pressed.

File : Main.java

package com.endeavour.myapp;



import android.app.Activity;

import android.os.Bundle;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.Toast;



public class Main extends Activity {




private EditText password;

private Button btnSubmit;




@Override

 
public void onCreate(Bundle savedInstanceState) {


       super.onCreate(savedInstanceState);

       setContentView(R.layout.main);

       addListenerOnButton();

}




public void addListenerOnButton() {

       password = (EditText) findViewById(R.id.txtPassword);  

       btnSubmit = (Button) findViewById(R.id.btnSubmit);

       btnSubmit.setOnClickListener(new OnClickListener() {



       @Override

       public void onClick(View v) {



      Toast.makeText(HomeScreen.this, password.getText(),Toast.LENGTH_SHORT).show();

      }

    });

}

}

4. Output

i. Password field being displayed.

ii. When Password is entered and Submit button is pressed.