Android - how to get height of bottomnavigationview

Android - how to get height of bottomnavigationview

To get the height of a BottomNavigationView in Android, you need to wait until the view is fully laid out, which means its dimensions are available. This can be achieved by using a ViewTreeObserver.OnGlobalLayoutListener or a View.OnLayoutChangeListener.

Here are two approaches to accomplish this:

Approach 1: Using ViewTreeObserver.OnGlobalLayoutListener

This listener is triggered when the view's layout has been changed or when the view hierarchy is laid out.

BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); bottomNavigationView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { // Remove the listener to prevent multiple calls bottomNavigationView.getViewTreeObserver().removeOnGlobalLayoutListener(this); // Get the height of the BottomNavigationView int height = bottomNavigationView.getHeight(); Log.d("BottomNavHeight", "Height: " + height); } });

Approach 2: Using View.OnLayoutChangeListener

This listener is triggered whenever the layout bounds of a view change due to layout processing.

BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); bottomNavigationView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() { @Override public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) { // Remove the listener to prevent multiple calls bottomNavigationView.removeOnLayoutChangeListener(this); // Get the height of the BottomNavigationView int height = bottomNavigationView.getHeight(); Log.d("BottomNavHeight", "Height: " + height); } });

Explanation

  • ViewTreeObserver.OnGlobalLayoutListener: This listener is useful for getting view dimensions as soon as the view's layout is complete.
  • View.OnLayoutChangeListener: This listener is useful for tracking layout changes, including changes in size.

Choosing the Approach

Both approaches are effective for retrieving the height of a BottomNavigationView once it's laid out. The choice between them depends on your specific requirements:

  • Use OnGlobalLayoutListener if you only need to get the height once after the initial layout.
  • Use OnLayoutChangeListener if you need to track changes to the layout bounds continuously.

By implementing either of these methods, you can retrieve the height of a BottomNavigationView accurately after its layout has been completed.

Examples

  1. Android BottomNavigationView height programmatically Description: Retrieves the height of a BottomNavigationView programmatically using ViewTreeObserver.

    BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); bottomNavigationView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() { @Override public void onGlobalLayout() { int height = bottomNavigationView.getHeight(); Log.d("BottomNavHeight", "Height: " + height); // Optionally, remove the listener if height is obtained bottomNavigationView.getViewTreeObserver().removeOnGlobalLayoutListener(this); } });

  2. Android get BottomNavigationView height in pixels Description: Retrieves the height of a BottomNavigationView in pixels using getHeight() method.

    BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); int height = bottomNavigationView.getHeight(); Log.d("BottomNavHeight", "Height in pixels: " + height);

  3. Android BottomNavigationView getLayoutParams height Description: Retrieves the height of a BottomNavigationView using its LayoutParams.

    BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); ViewGroup.LayoutParams layoutParams = bottomNavigationView.getLayoutParams(); int height = layoutParams.height; Log.d("BottomNavHeight", "Height from LayoutParams: " + height);

  4. Android get BottomNavigationView height after layout Description: Retrieves the height of a BottomNavigationView after it has been laid out using addOnLayoutChangeListener.

    BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); bottomNavigationView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() { @Override public void onLayoutChange(View v, int left, int top, int right, int bottom, int oldLeft, int oldTop, int oldRight, int oldBottom) { int height = bottom - top; Log.d("BottomNavHeight", "Height after layout: " + height); // Optionally, remove the listener if height is obtained bottomNavigationView.removeOnLayoutChangeListener(this); } });

  5. Android BottomNavigationView getHeight returns 0 Description: Handles scenarios where getHeight() returns 0 due to the view not being fully laid out yet.

    BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); bottomNavigationView.post(new Runnable() { @Override public void run() { int height = bottomNavigationView.getHeight(); Log.d("BottomNavHeight", "Height: " + height); } });

  6. Android measure BottomNavigationView height Description: Measures the height of a BottomNavigationView using measure() and getMeasuredHeight().

    BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); bottomNavigationView.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED); int height = bottomNavigationView.getMeasuredHeight(); Log.d("BottomNavHeight", "Measured Height: " + height);

  7. Android get BottomNavigationView height in fragment Description: Retrieves the height of a BottomNavigationView from within a fragment using getView().

    View view = getView(); if (view != null) { BottomNavigationView bottomNavigationView = view.findViewById(R.id.bottom_navigation_view); int height = bottomNavigationView.getHeight(); Log.d("BottomNavHeight", "Height in fragment: " + height); }

  8. Android BottomNavigationView get height in XML Description: Specifies the height of a BottomNavigationView in XML layout.

    <android.support.design.widget.BottomNavigationView android:id="@+id/bottom_navigation_view" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" app:menu="@menu/bottom_navigation_menu" />

  9. Android BottomNavigationView getHeight in onCreate Description: Retrieves the height of a BottomNavigationView in the onCreate method after layout inflation.

    @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); bottomNavigationView.post(new Runnable() { @Override public void run() { int height = bottomNavigationView.getHeight(); Log.d("BottomNavHeight", "Height in onCreate: " + height); } }); }

  10. Android BottomNavigationView dynamic height Description: Implements a dynamic approach to getting the height of a BottomNavigationView based on its content and layout properties.

    BottomNavigationView bottomNavigationView = findViewById(R.id.bottom_navigation_view); bottomNavigationView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { bottomNavigationView.getViewTreeObserver().removeOnPreDrawListener(this); int height = bottomNavigationView.getHeight(); Log.d("BottomNavHeight", "Dynamic Height: " + height); return true; } });

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