Android FrameLayout Tutorial
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FrameLayout is a simple layout. It can contain one or more child View(s), and they can overlap each other. Therefore, the android:layout_gravity attribute is used to locate the child View(s).

In particular, FrameLayout has 9 gravity areas illustrated in the picture below. Note that they are imaginary areas, so it doesn't mean that the FrameLayout is physically divided into 9 parts.

When a View is added to the FrameLayout, by default, it will lie in the gravity of the "left|top". Take a look at the example below, I add 2 Button(s) to the FrameLayout, by default, they lie in the gravity of the "left|top" and you see that they are overlapping each other.

Use the android:layout_gravity attribute to adjust the button position.

The value of android:layout_gravity can be the combination of the following values:

Constant in Java | Value | Description |
Gravity.LEFT | left | |
Gravity.CENTER_HORIZONTAL | center_horizontal | |
Gravity.RIGHT | right | |
Gravity.TOP | top | |
Gravity.CENTER_VERTICAL | center_vertical | |
Gravity.BOTTOM | bottom | |
Gravity.START | start | |
Gravity.END | end | |
Gravity.CENTER | center | |
Below is an illustration of using both a VideoView and a MediaController into a FrameLayout, which saves the application space and provides the user with a better experience.

In this example, I'm going to put an ImageView and two TextView(s) in a FrameLayout, then use the android:layout_gravity attribute to set their positions.
Example preview:

Show in Portraint screen

Show in Landscape screen
Awesome, now on Android Studio, create a project:
- File > New > New Project > Empty Activity
- Name: FrameLayoutExample
- Package name: org.o7planning.framelayoutexample
- Language: Java
Then find an image file:

halong.png
After that, copy the file to the folder "drawable" of the project:

Next, design the application interface:

Later, set some constraints for the FrameLayout:

Now set some important attributes for the ImageView to make sure that it fully fills the FrameLayout.
* imageView *
<ImageView android:id="@+id/imageView" android:layout_width="match_parent" android:layout_height="wrap_content" android:adjustViewBounds="true" android:scaleType="fitXY" app:srcCompat="@drawable/halong" />

And set the android:layout_gravity attribute for the TextView(s):

Finally set text, and textColor for the TextView(s):

activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity"> <FrameLayout android:id="@+id/frameLayout" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginStart="16dp" android:layout_marginLeft="16dp" android:layout_marginTop="16dp" android:layout_marginEnd="16dp" android:layout_marginRight="16dp" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent"> <ImageView android:id="@+id/imageView" android:layout_width="match_parent" android:layout_height="wrap_content" android:adjustViewBounds="true" android:scaleType="fitXY" app:srcCompat="@drawable/halong" /> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="top|left" android:text="Halong Bay, Vietnam" android:textColor="#FFFFFF" /> <TextView android:id="@+id/textView2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_gravity="bottom|right" android:text="Photo by intrepidtravel.com" android:textColor="#FFFFFF" /> </FrameLayout> </androidx.constraintlayout.widget.ConstraintLayout>
MainActivity.java
package org.o7planning.framelayoutexample; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.Gravity; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } }