Visibility属性中invisible和gone 区别

http://developer.android.com/reference/android/view/View.html#attr_android:visibility

下面是Android Developers上面介绍它们的区别：

android:visibility

Controls the initial visibility of the view.

Must be one of the following constant values.

Constant	Value	Description
visible	0	Visible on screen; the default value.
invisible	1	Not displayed, but taken into account during layout (space is left for it).
gone	2	Completely hidden, as if the view had not been added.

This corresponds to the global attribute resource symbol visibility.

Related Methods

• setVisibility(int)

gone就是彻底隐藏，InVisible就是看不见，但是控件对空间的占用仍然是存在的。

<LinearLayout
        android:id="@+id/ll_1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
    <ImageView 
        android:id="@+id/iv1"
        android:src="@drawable/ic_launcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="invisible"/>
      <ImageView 
        android:id="@+id/iv2"
        android:src="@drawable/ic_launcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="visible"/>
     </LinearLayout>
     <LinearLayout
        android:id="@+id/ll_2"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">
    <ImageView 
        android:id="@+id/iv3"
        android:src="@drawable/ic_launcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone"/>
      <ImageView 
        android:id="@+id/iv4"
        android:src="@drawable/ic_launcher"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="visible"/>
      </LinearLayout>

通过上面的代码可以看到像右侧的效果：