按钮的宽度不匹配父的Andr​​oid [英] Button width does not match parent android

问题描述

我有以下XML：

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
    <TextView
    android:id="@+id/text_view"
    android:layout_width="wrap_content"
    android:layout_height="match_parent"
    android:layout_gravity="center_horizontal|center_vertical"
    android:layout_marginTop="20dip"
    android:text="Fragment1"
    android:textAppearance="?android:attr/textAppearanceLarge"
    android:textSize="30dip" />

    <Button 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button1"/>


 <GridView 
      android:id="@+id/gridview"
      android:layout_width="wrap_content" 
      android:layout_height="match_parent"overla
      android:columnWidth="90dp"
      android:numColumns="auto_fit"
      android:verticalSpacing="10dp"
      android:horizontalSpacing="10dp"
      android:stretchMode="columnWidth"
      android:gravity="center"/>                            

        <Button 
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Button1"/>
 </LinearLayout>

Button1的用于切换网格视图的可见性。但是，当网格视图是不可见的，该按钮不填充屏幕。他们占据了半个屏幕。当电网视图可见虽然，按键占据了所有的画面，因为我希望他们。我一直无法理解这种奇怪的行为。

The button1 is used to toggle the visibility of the grid view. But, when the grid view is not visible, the buttons don't fill the screen. They occupy half the screen. When the grid view is visible though, the buttons occupy all of the screen as I want them to. I haven't been able to understand this strange behaviour.

推荐答案

尝试改变的宽度的线性布局来的 match_parent

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >

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