LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)m=MainLayout.getLayoutParams();
params.setMargins(0,0,0,0);
mMainLayout.setLayoutParams(params);
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LinearLayout.LayoutParams params = (LinearLayout.LayoutParams)m=MainLayout.getLayoutParams();
params.setMargins(0,0,0,0);
mMainLayout.setLayoutParams(params);