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I looked at lot of places where layout_height="0dp" used. Can someone tell me what does it mean? I tried looking at android developer docs and did not find relevant information there.
Thanks.
306
Equal distribution. To create a linear layout in which each child uses the same amount of space on the screen, set the android:layout_height of each view to "0dp" (for a vertical layout) or the android:layout_width of each view to "0dp" (for a horizontal layout).
for the children of ConstraintLayout if you have set constraints then the 0dp is for match_constraint (take full width, or full height) Using 0dp, which is the equivalent of "MATCH_CONSTRAINT" https://developer.android.com/reference/android/support/constraint/ConstraintLayout.
In a nutshell, layout_weight specifies how much of the extra space in the layout to be allocated to the View. LinearLayout supports assigning a weight to individual children. This attribute assigns an "importance" value to a view, and allows it to expand to fill any remaining space in the parent view.
LinearLayout is a view group that aligns all children in a single direction vertically or horizontally. You can specify the layout direction with its orientation attribute.
Well, height or width when set to "0dp", are mostly used in combination with "weight". e.g. you want to fill all the available space for height:
android:layout_height = "0dp"
android:layout_weight = "1.0"
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