No orientation specified, and the default is horizontal.

整的錯誤提示信息爲：No orientation specified, and the default is horizontal. This is a common source of bugs whenandroid  children are added dynamically. 一般發生這個錯誤提示的緣由是咱們直接在原有的頁面上把別的佈局標籤改爲<LinearLayout>，可是使用<Li

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