Android password field example

In Android, you can use “android.widget.EditText“, with inputType="textPassword" to render a password component.
In this tutorial, we show you how to use XML to create a password field, label field and a normal button. When you click on the button, the password value will be displayed as a floating message (toast message).
P.S This project is developed in Eclipse 3.7, and tested with Android 2.3.3.

1. Custom String

Open “res/values/strings.xml” file, add some custom string for demonstration.
File : res/values/strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="app_name">MyAndroidApp</string>
    <string name="lblPassword">Enter Your Password :</string>
    <string name="btn_submit">Submit</string>
</resources>

2. Password

Open “res/layout/main.xml” file, add a password component, EditText + inputType="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: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. Code Code

Inside activity “onCreate()” method, attach a click listener on button, to display the password value.
File : MyAndroidAppActivity.java

package com.mkyong.android;
 
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 MyAndroidAppActivity 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(MyAndroidAppActivity.this, password.getText(),
			Toast.LENGTH_SHORT).show();
 
		}
 
	});
 
  }
}

4. Demo

Run the application.
1. Result, password field is displayed.

2. Type password “mkyong123″ and click on the submit button.

Download Source Code

Download it – Android-Password-Example.zip (15 KB)