The intention of ConstraintLayout is to optimize and flatten the view hierarchy of your layouts by applying some rules to each view to avoid nesting. The Rules are similar to RelativeLayout, for example setting the bottom edge to the bottom of some other view. app:layout_constraintBottom_toBottomOf=”@+id/view1″ Unlike RelativeLayout, ConstraintLayout offers a bias value that is used … Read more
You can access any LayoutParams from code using View.getLayoutParams. You just have to be very aware of what LayoutParams your accessing. This is normally achieved by checking the containing ViewGroup if it has a LayoutParams inner child then that’s the one you should use. In your case it’s RelativeLayout.LayoutParams. You’ll be using RelativeLayout.LayoutParams#addRule(int verb) and … Read more
You are looking for the android:layout_weight attribute. It will allow you to use percentages to define your layout. In the following example, the left button uses 70% of the space, and the right button 30%. <LinearLayout android:layout_width=”match_parent” android:layout_height=”wrap_content” android:orientation=”horizontal”> <Button android:text=”left” android:layout_width=”0dp” android:layout_height=”wrap_content” android:layout_weight=”.70″ /> <Button android:text=”right” android:layout_width=”0dp” android:layout_height=”wrap_content” android:layout_weight=”.30″ /> </LinearLayout> It works the … Read more