android - How to show/hide password in TextFormField?

Android - How to show/hide password in TextFormField?

In Android, to create a password field where you can toggle the visibility (show/hide) of the password, you typically use an EditText with inputType="textPassword". To add a show/hide functionality, you can use a toggle icon (like an eye icon) that changes the inputType to reveal or hide the password.

Here's a step-by-step guide on how to implement a show/hide password functionality in an EditText:

Step 1: Set Up the EditText with a Toggle Icon

Create a layout that includes an EditText and a button or ImageView to serve as the toggle for showing/hiding the password. You can use a TextInputLayout with a TextInputEditText for additional styling and validation capabilities.

<!-- res/layout/activity_main.xml --> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="horizontal" android:gravity="center_vertical" android:padding="16dp"> <TextInputLayout android:layout_width="match_parent" android:layout_height="wrap_content"> <TextInputEditText android:id="@+id/password_edit_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="Enter your password" android:inputType="textPassword" /> <!-- Start with hidden password --> </TextInputLayout> <ImageView android:id="@+id/toggle_visibility" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/ic_visibility_off" <!-- Eye icon with a slash --> android:contentDescription="Toggle password visibility" android:padding="8dp" /> </LinearLayout>

Step 2: Implement the Toggle Functionality

Add an OnClickListener to the toggle icon to change the inputType and switch the icon when clicked.

import android.os.Bundle; import android.text.InputType; import android.widget.ImageView; import android.widget.EditText; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { private boolean isPasswordVisible = false; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); EditText passwordEditText = findViewById(R.id.password_edit_text); ImageView toggleVisibility = findViewById(R.id.toggle_visibility); toggleVisibility.setOnClickListener(v -> { isPasswordVisible = !isPasswordVisible; // Toggle the visibility state if (isPasswordVisible) { // Show the password passwordEditText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD); toggleVisibility.setImageResource(R.drawable.ic_visibility); // Change to eye icon without slash } else { // Hide the password passwordEditText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD); toggleVisibility.setImageResource(R.drawable.ic_visibility_off); // Change to eye icon with slash } // Ensure the cursor remains at the end of the text passwordEditText.setSelection(passwordEditText.getText().length()); }); } }

Explanation

  • Toggle State: The isPasswordVisible flag keeps track of whether the password is currently visible or hidden.
  • InputType: Changing the inputType allows you to toggle between visible and hidden password.
  • Icon Switch: Update the toggle icon to represent the current state (visible/hidden).
  • Cursor Position: After changing the inputType, set the cursor back to the end of the text to maintain a good user experience.

Additional Tips

  • Accessibility: Ensure the toggle icon has a proper contentDescription for accessibility.
  • Security: Consider whether allowing users to view the password is appropriate for your app's security context.
  • UI/UX: Test the implementation to ensure it provides a smooth user experience and doesn't cause unexpected behavior.

This approach allows you to create a show/hide password functionality in an Android EditText, providing flexibility and enhancing user experience.

Examples

  1. "Android TextFormField show/hide password code"

    Description: This query aims to find code examples or tutorials demonstrating how to implement a show/hide password functionality in a TextFormField in Android. Below is a code snippet illustrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Set a toggle listener to show/hide password passwordField.setTransformationMethod(new PasswordTransformationMethod()); // Toggle password visibility when the toggle button is clicked toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { // Show password passwordField.setTransformationMethod(null); } else { // Hide password passwordField.setTransformationMethod(new PasswordTransformationMethod()); } } });

    This code sets up a toggle listener to show/hide the password when a toggle button is clicked. It utilizes setTransformationMethod() method to change the transformation method of the TextFormField.

  2. "How to implement show/hide password feature in Android TextFormField"

    Description: This query seeks information on how to implement a feature allowing users to show/hide the password entered in a TextFormField. Below is a code snippet demonstrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Set a toggle listener to show/hide password toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { // Show password passwordField.setTransformationMethod(null); } else { // Hide password passwordField.setTransformationMethod(new PasswordTransformationMethod()); } } });

    This code sets up a toggle listener to show/hide the password when a toggle button is clicked, making use of setTransformationMethod() method.

  3. "Android TextFormField password visibility toggle code"

    Description: This query targets code examples or tutorials demonstrating how to add a toggle functionality for password visibility in a TextFormField in Android. Below is a code snippet illustrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Set a toggle listener to show/hide password toggleButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // Toggle password visibility if (passwordField.getTransformationMethod() == PasswordTransformationMethod.getInstance()) { passwordField.setTransformationMethod(HideReturnsTransformationMethod.getInstance()); } else { passwordField.setTransformationMethod(PasswordTransformationMethod.getInstance()); } } });

    This code adds an OnClickListener to the toggle button to toggle the password visibility between visible and hidden states by changing the transformation method accordingly.

  4. "How to show password in Android TextFormField programmatically"

    Description: This query aims to find a programmatic solution to show the password entered in a TextFormField in Android. Below is a code snippet demonstrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Show password programmatically passwordField.setTransformationMethod(null);

    This code programmatically changes the transformation method of the TextFormField to null, effectively showing the password in plain text.

  5. "Android TextFormField hide password code"

    Description: This query targets code examples or tutorials demonstrating how to hide the password entered in a TextFormField in Android. Below is a code snippet illustrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Hide password programmatically passwordField.setTransformationMethod(new PasswordTransformationMethod());

    This code sets the transformation method of the TextFormField to PasswordTransformationMethod, effectively hiding the password.

  6. "Android TextFormField toggle password visibility code"

    Description: This query seeks code examples or tutorials on how to implement a toggle functionality to switch between showing and hiding the password in a TextFormField. Below is a code snippet demonstrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Set a toggle listener to show/hide password toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { // Show password passwordField.setTransformationMethod(null); } else { // Hide password passwordField.setTransformationMethod(new PasswordTransformationMethod()); } } });

    This code sets up a toggle listener to switch between showing and hiding the password based on the state of the toggle button.

  7. "How to hide password in Android TextFormField programmatically"

    Description: This query aims to find a programmatic solution to hide the password entered in a TextFormField in Android. Below is a code snippet demonstrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Hide password programmatically passwordField.setTransformationMethod(new PasswordTransformationMethod());

    This code programmatically sets the transformation method of the TextFormField to PasswordTransformationMethod, effectively hiding the password.

  8. "Android TextFormField password visibility toggle switch code"

    Description: This query targets code examples or tutorials demonstrating how to implement a toggle switch for password visibility in a TextFormField in Android. Below is a code snippet illustrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Set a toggle listener to show/hide password toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { // Show password passwordField.setTransformationMethod(null); } else { // Hide password passwordField.setTransformationMethod(new PasswordTransformationMethod()); } } });

    This code sets up a toggle listener to switch between showing and hiding the password based on the state of the toggle switch.

  9. "Android TextFormField show/hide password toggle code"

    Description: This query aims to find code examples or tutorials demonstrating how to implement a toggle functionality for showing and hiding the password in a TextFormField in Android. Below is a code snippet illustrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Set a toggle listener to show/hide password toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { // Show password passwordField.setTransformationMethod(null); } else { // Hide password passwordField.setTransformationMethod(new PasswordTransformationMethod()); } } });

    This code sets up a toggle listener to switch between showing and hiding the password based on the state of the toggle button.

  10. "How to toggle password visibility in Android TextFormField"

    Description: This query seeks information on how to implement a toggle functionality to switch between showing and hiding the password entered in a TextFormField in Android. Below is a code snippet demonstrating this:

    // Find the TextFormField by its ID TextFormField passwordField = findViewById(R.id.password_text_field); // Set a toggle listener to show/hide password toggleButton.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { // Show password passwordField.setTransformationMethod(null); } else { // Hide password passwordField.setTransformationMethod(new PasswordTransformationMethod()); } } });

    This code sets up a toggle listener to switch between showing and hiding the password based on the state of the toggle button.

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