Can I draw rectangle in XML?

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Yes you can and here is one I made earlier:

<?xml version="1.0" encoding="UTF-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/listview_background_shape">
    <stroke android:width="2dp" android:color="#ff207d94" />
    <padding android:left="2dp"
        android:top="2dp"
        android:right="2dp"
        android:bottom="2dp" />
    <corners android:radius="5dp" />
    <solid android:color="#ffffffff" />
</shape>

You can create a new XML file inside the drawable folder, and add the above code, then save it as rectangle.xml.

To use it inside a layout you would set the android:background attribute to the new drawable shape. The shape we have defined does not have any dimensions, and therefore will take the dimensions of the View that is defined in the layout.

So putting it all together:

<View
    android:id="@+id/myRectangleView"
    android:layout_width="200dp"
    android:layout_height="50dp"
    android:background="https://stackoverflow.com/questions/10124919/@drawable/rectangle"/>

Finally; you can set this rectangle to be the background of any View, although for ImageViews you would use android:src. This means you could use the rectangle as the background for ListViews, TextViews…etc.

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