change edittext hint color when using textinputlayout

Okay, let's dive into changing the hint color of an `EditText` when using `TextInputLayout` in Android. This is a common customization and can be done in several ways, depending on the desired behavior and your project's requirements. We'll cover the most common scenarios and provide code examples.

**Understanding the Problem**

The `TextInputLayout` component is a wrapper around an `EditText` that provides visual enhancements, such as floating labels, error handling, and helper text. The hint color of the `EditText` is influenced by both the `TextInputLayout` and the `EditText`'s own attributes. When focused or when the user has entered data, the hint moves above the input field, becoming the "floating label." We need to control the color of this floating label and potentially the hint color when the `EditText` is empty and unfocused.

**Methods to Change Hint Color**

Here are the common approaches:

1. **Using `app:hintTextColor` in `TextInputLayout` (Recommended - API 23+):**

This is the simplest and most straightforward method, especially if you're targeting API level 23 (Android 6.0 Marshmallow) or higher. This attribute directly controls the hint color when the `EditText` is focused and the hint is "floating" above the input field.

**XML Layout:**



**Explanation:**



2. **Using `app:hintTextAppearance` in `TextInputLayout` (Recommended for Styling - API 21+):**

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