LinearLayout layout = (LinearLayout)findViewById(R.id.title);
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(layout.getWidth(), layout.getHeight());//这里的类型保持和title父级类型一致。
int px = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,60, getResources().getDisplayMetrics());
params.leftMargin = layout.getWidth()/2;
layout.setLayoutParams(params);
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