alrajdev / single-child-layout

An Androd FrameLayout implementation which can only have a single direct child visible/invisible

Single Child Layout

An Androd FrameLayout implementation which can only have a single direct child visible/invisible

Add to your project:

In your root build.gradle file:

allprojects {
  repositories {
    ...
    maven { url 'jitpack.io' }
  }
}

and in your module build.gradle file: Latest version: 1.0.0

dependencies {
  implementation 'com.github.alraj-dev:singlechildlayout:latest-version'
}

When using FrameLayout to show alternative view on certain conditions, we need to show one view and hide others, which is frustrating. This Layout can have only one visible child at a time, here visible means both View.VISIBLE and View.INVISIBLE.

In XML when multiple child view is visible, every child view is set to View.GONE except the last visible child.

Eg:

 <SingleChildLayout
    android:layout_width="match_parent"
    android:layout_height="match_payment">
    
    <TextView
        android:id="@+id/textview1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView1"/>
        
    <TextView
        android:id="@+id/textview2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView2"/>
        
    <TextView
        android:id="@+id/textview3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView3"/>
        
    <TextView
        android:id="@+id/textview4"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView4"/> 
</SingleChildLayout>

Here only textview4 is visible and other textviews are set to View.GONE. Only the last child which has visibility set to View.VISIBLE or View.INVISIBLE is kept as such.

When another child is shown, the previous visible child is hidden

Eg:

textview1.visibility = View.VISIBLE

or

textview1.visiblilty = View.INVISIBLE

textview1 is automatically set to View.GONE, so no need to set other child view's to View.GONE manually. So,

textview1.visibility = View.VISIBLE

instead of

textview1.visibility = View.VISIBLE
textview4.visibility = View.GONE