In Android, User Interface (UI) controls are used to create interactive user interfaces. They are the building blocks of the user interface and include elements like buttons, text fields, checkboxes, etc. Let’s explore some commonly used UI controls in Android.

TextView

A TextView is a UI control that displays text to the user. It’s used for labels, descriptions, and any other text elements.

<TextView
    android:id="@+id/text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello, World!" />

<EditText
    android:id="@+id/edit_text"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />

Button

A Button is a clickable element that acts when the user taps on it.

<Button
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Click Me" />

CheckBox

A CheckBox is a two-state button that can be either checked or unchecked.

<CheckBox
    android:id="@+id/check_box"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Check Me" />

RadioButton

A RadioButton is a two-state button that can be either checked or unchecked. However, unlike a CheckBox, a set of RadioButtons are grouped, and only one RadioButton in a group can be checked at a time.

<RadioGroup
    android:id="@+id/radio_group"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">

    <RadioButton
        android:id="@+id/radio_button_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Option 1" />

    <RadioButton
        android:id="@+id/radio_button_2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Option 2" />

</RadioGroup>

Spinner

A Spinner provides a quick way to select one value from a set. In the default state, a spinner shows its currently selected value.

<Spinner
    android:id="@+id/spinner"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

ProgressBar

A ProgressBar is a visual indicator of progress in some operations. Displays a bar to the user representing how far the operation has progressed.

<ProgressBar
    android:id="@+id/progress_bar"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

SeekBar

A SeekBar is an extension of ProgressBar that adds a draggable thumb. The user can touch the thumb and drag left or right to set the current progress level.

<SeekBar
    android:id="@+id/seek_bar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content" />