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How to Use Material Text Input Layout in Android?

Material Text Input Layout is a part of the Material Components for Android library that provides a Material-themed EditText UI. Here's a step-by-step guide on how to use it:

1. Add the Material Components Dependency:

If you haven't already added the Material Components library to your project, add it to your app's build.gradle:

implementation 'com.google.android.material:material:1.4.0' // Always check for the latest version

2. Add Material Text Input Layout to your XML layout:

<com.google.android.material.textfield.TextInputLayout
    android:id="@+id/textInputLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="Your Hint Here">

    <com.google.android.material.textfield.TextInputEditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</com.google.android.material.textfield.TextInputLayout>

3. Attributes and Customizations:

android:hint: This replaces the EditText's hint and serves as the floating label when the user starts typing.
app:errorEnabled="true": Enable this if you want to show error messages.
app:passwordToggleEnabled="true": This is used for password fields to provide a show/hide password toggle.

4. Set Errors:

To set an error message, you can call the setError method on the TextInputLayout:

val textInputLayout = findViewById<TextInputLayout>(R.id.textInputLayout)
textInputLayout.error = "Error message here"

To clear the error, you can set the error message to null.

5. Use with Other Styles:

Material Text Input Layout also supports outlined and filled boxes:

Outlined Box:

<com.google.android.material.textfield.TextInputLayout
    style="@style/Widget.MaterialComponents.TextInputLayout.OutlinedBox"
    ...>
    ...
</com.google.android.material.textfield.TextInputLayout>

Filled Box:

<com.google.android.material.textfield.TextInputLayout
    style="@style/Widget.MaterialComponents.TextInputLayout.FilledBox"
    ...>
    ...
</com.google.android.material.textfield.TextInputLayout>

6. End Icons:

Material Text Input Layout allows the use of end icons. For instance, to use a clear text end icon:

<com.google.android.material.textfield.TextInputLayout
    app:endIconMode="clear_text"
    ...>
    ...
</com.google.android.material.textfield.TextInputLayout>

7. Prefix and Suffix:

You can set a prefix or a suffix to the input:

textInputLayout.prefixText = "$"
textInputLayout.suffixText = ".com"

This is just a basic introduction to the Material Text Input Layout. It has a variety of other features and customization options, such as helper text, character counter, etc. Refer to the official Material Components documentation for more advanced usage and customization.

How to integrate Material Text Input Layout in Android:

Integrating Material Text Input Layout in Android involves adding the Material Components for Android library to your app's build.gradle file:

implementation 'com.google.android.material:material:1.4.0'

In your XML layout file, you can use the TextInputLayout to wrap your EditText:

<com.google.android.material.textfield.TextInputLayout
    android:id="@+id/textInputLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:hint="Username">

    <com.google.android.material.textfield.TextInputEditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</com.google.android.material.textfield.TextInputLayout>

Android Material Design Text Input Layout example code:

Once integrated, you can access the TextInputLayout and TextInputEditText in your Java/Kotlin code:

TextInputLayout textInputLayout = findViewById(R.id.textInputLayout);
TextInputEditText editText = findViewById(R.id.editText);

// Get the entered text
String enteredText = editText.getText().toString();

Customizing Material Text Input Layout in Android Studio:

You can customize the appearance of the Material Text Input Layout by adjusting its attributes in the XML layout file or programmatically in code. For example, you can change the hint color, box stroke color, and more:

<com.google.android.material.textfield.TextInputLayout
    android:id="@+id/textInputLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    app:hintTextColor="@color/custom_hint_color">

    <!-- TextInputEditText and other attributes -->

</com.google.android.material.textfield.TextInputLayout>

Material Text Input Layout validation in Android development:
You can add validation to the Material Text Input Layout to ensure that the user input meets certain criteria. For example, you can check if the entered text is not empty:
```
if (editText.getText().toString().isEmpty()) {
    textInputLayout.setError("Field cannot be empty");
} else {
    textInputLayout.setError(null); // Clear the error
}
```
Handling error messages with Material Text Input Layout in Android:
Material Text Input Layout provides built-in error handling. You can set an error message when validation fails:
```
textInputLayout.setError("Field cannot be empty");
```
You can also clear the error when the input is valid:
```
textInputLayout.setError(null);
```

Styling Material Text Input Layout in Android app:

Styling Material Text Input Layout involves customizing its appearance using styles and attributes. You can define a custom style in your styles.xml file:

<style name="CustomTextInputLayout" parent="Widget.MaterialComponents.TextInputLayout.OutlinedBox">
    <item name="boxStrokeColor">@color/custom_stroke_color</item>
    <item name="hintTextColor">@color/custom_hint_color</item>
    <!-- Add more customizations as needed -->
</style>

Apply this style to your TextInputLayout:

<com.google.android.material.textfield.TextInputLayout
    android:id="@+id/textInputLayout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    style="@style/CustomTextInputLayout">

    <!-- TextInputEditText and other attributes -->

</com.google.android.material.textfield.TextInputLayout>