RecyclerView萬能分割線

public class DividerItemDecoration extends RecyclerView.ItemDecoration{ /* * RecyclerView的佈局方向，默認先賦值 爲縱向佈局 * RecyclerView 佈局可橫向，也可縱向 * 橫向和縱向對應的分割線畫法不一樣 * */ private int mOrientation = LinearLayoutMana

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