![]() a float value, representing a ratio between width and height.The above code will set the height of the button to be the same as its width. In order to do that, you need to have at least one constrained dimension be set to 0 dp (i.e., MATCH_CONSTRAINT), and set the attribute layout_constraintDimensionRatio to a given ratio. Ratio : You can also define one dimension of a widget as a ratio of the other one. Note : In Constraint Layout use of MATCH_PARENT is discouraged as it will not take constraint applied on a widget into consideration. The MATCH_CONSTRAINT uses the below modifiers : app:layout_constraintWidth_max="" app:layout_constraintWidth_min="" app:layout_constraintHeight_max="" app:layout_constraintHeight_min="" We use 0 dp to represent MATCH_CONSTRAINT in Constraint Layout. These modifiers are only valid with WRAP_CONTENT.Ĭ) MATCH_CONSTRAINT : The widget that specifies its dimension to MATCH_CONSTRAINT will take all the available space. We also have below modifiers frequently used in conjection with WRAP_CONTENT - android:minWidth="" android:minHeight="" android:maxHeight="" android:maxWidth="" The above attributes makes the widget follow the constraint whether it is vertical or horizontal. Hence to fight this situation, google has provided us with two very useful attributes, they are as follows : In the above case the material text view has been given the below attributes android:layout_height="wrap_content" inspite of the constraint the text view is totally overlapping the spinner. Image source : Screenshot from Android Studio
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