How to Programmatically Hide a View in Android?

How can I hide a View in Android programmatically during an activity result?

if(!mUseVolumeButtonAsPTT){
    bottomLinearLayout.setVisibility(View.GONE);
} else {
    bottomLinearLayout.setVisibility(View.VISIBLE);
}

This guide will walk you through the steps to programmatically hide and show a View, specifically a `LinearLayout`, when returning from an activity in an Android application.

// Hiding the bottom LinearLayout based on the boolean value passed from the menu activity.
if(resultData.getBoolean("UseVolumeButtonAsPTT")) {
    bottomLinearLayout.setVisibility(View.VISIBLE);  // Show
} else {
    bottomLinearLayout.setVisibility(View.GONE);    // Hide
}

Causes

• Not correctly referencing the layout to be hidden or shown.
• Confusion between `View.GONE` and `View.INVISIBLE`.
• Failing to call `setVisibility()` method on the right UI thread.

Solutions

• Use the `setVisibility(View.GONE)` method to hide a View and `setVisibility(View.VISIBLE)` to show it.
• Ensure you're referencing the correct `LinearLayout` IDs when calling `findViewById()` method.
• Invoke UI updates on the main (UI) thread by using `runOnUiThread()` if updating from a background thread.

Mistake: Using `setVisibility(View.INVISIBLE)` instead of `View.GONE`.

Solution: Use `View.GONE` to remove the view from the layout, allowing other views to move up.

Mistake: Not calling `setVisibility()` on the UI thread leading to no change in the layout.

Solution: Use `runOnUiThread()` to ensure layout changes are executed on the main thread.