LinearLayout linearLayout = (LinearLayout) mTbTitle.getChildAt(0);
                linearLayout.setShowDividers(LinearLayout.SHOW_DIVIDER_MIDDLE);
                linearLayout.setDividerPadding(40); // 設定分割線的pandding
                linearLayout.setDividerDrawable(ContextCompat.getDrawable(getContext(),
                        R.drawable
 
.sp_exposure_select));

檔案 sp_exposure_select

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid android:color="#757575"/>
    <size
        android:width="1dp"
        />

</shape>

參考
http://www.jianshu.com/p/2b2bb6be83a8