LinearLayout.LayoutParams param = new LinearLayout.LayoutParams(
    LayoutParams.MATCH_PARENT, //OR WRAP_CONTENT -> layout_width
    LayoutParams.MATCH_PARENT, //OR WRAP_CONTENT -> layout_height
    1.0f // layout_weight 1
);
YOUR_VIEW.setLayoutParams(param);

Android Studio Set Weight Layout Programatically

PermaLink: https://www.webmanajemen.com/2020/03/android-studio-set-weight-layout.html

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