Android2.2中添加的match_parent和fill_parent沒有區別

 

標題裡已經把這個意思表達清楚了，兩個參數意思一樣，只是某大仙覺得match_parent更貼切，於是從2.2開始你兩個詞都可以用。那麼如果考慮低版本的使用方式你就需要用fill_parent了。

下面是兩者相同的證據，看android.view.ViewGroup裡的靜態嵌套類LayoutParams中的代碼：

public static final int FILL_PARENT = -1;<br /> /**<br /> * Special value for the height or width requested by a View.<br /> * MATCH_PARENT means that the view wants to be as big as its parent,<br /> * minus the parent's padding, if any. Introduced in API Level 9.<br /> */<br /> public static final int MATCH_PARENT = -1; </p><p> /**<br /> * Special value for the height or width requested by a View.<br /> * WRAP_CONTENT means that the view wants to be just large enough to fit<br /> * its own internal content, taking its own padding into account.<br /> */ match_parent到底是什麼類型呢? 其實從Android 2.2開始FILL_PARENT改名為MATCH_PARENT ，從 API Level為8開始我們可以直接用MATCH_PARENT來代替FILL_PARENT，最後Android123提醒大家，他們的定義本質是一樣均為 -1，只是換了個別名，可能為了更準確些，比如最終在SDK中的定義為: 
fill_parent   -1 The view should be as big as its parent (minus padding). This constant is deprecated starting from API Level 8 and is replaced by match_parent. 
match_parent   -1 The view should be as big as its parent (minus padding). Introduced in API Level 8. 
wrap_content -2 The view should be only big enough to enclose its content (plus padding).