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实例如下：
WindowManager wm = (WindowManager) getContext()
.getSystemService(Context.WINDOW_SERVICE);
int width = wm.getDefaultDisplay().getWidth();
int height = (int) (width - 22*density) / 3;
LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) mLinearLayoutTrafficControl.getLayoutParams();
lp.height = height;
LinearLayout.LayoutParams lp2 = (LinearLayout.LayoutParams) mLinearLayoutTrafficControl2.getLayoutParams();
lp2.height = height;
LinearLayout.LayoutParams lp3 = (LinearLayout.LayoutParams) mLinearLayoutTrafficServicesBusinessOnline.getLayoutParams();
lp3.height = height; 
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