eclipse Android ProgressBar .xml 布局
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Android ProgressBar .xml Layout
提问by tcd
I have this for an XMLfile:
我有这个XML文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ProgressBar
android:id="@+id/progressbar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|center_horizontal"
android:visibility="visible" />
<WebView
android:id="@+id/web_engine"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:visibility="gone" />
</LinearLayout>
And I want the ProgressBarto be the Largestyle, and be centered in the middle of the screen vertically and horizontally... When I set layout_widthand heightto fill_parent, it increases the size of the actual loading spinner to the entire screen... How can I make the layout fit the entire screen and center the actual loading icon?
我希望ProgressBar成为Large风格，并在垂直和水平方向居中于屏幕中间......当我设置layout_width和heightto 时fill_parent，它会将实际加载微调器的大小增加到整个屏幕......我该如何制作布局适合整个屏幕并使实际加载图标居中？
回答by Michal
I have checked few possibilities and in my experience the best option for such task is:
我已经检查了几种可能性，根据我的经验，执行此类任务的最佳选择是：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ProgressBar
android:id="@+id/progressbar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:visibility="visible" />
<WebView
android:id="@+id/web_engine"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:visibility="gone" />
</RelativeLayout>
I am using RelativeLayoutwith android:layout_centerInParent="true"which works better than LinearLayout.
我使用RelativeLayout与android:layout_centerInParent="true"该作品比更好LinearLayout。
Cheers
干杯
回答by Marcin S.
You can also use FrameLayout insetad of LinearLayout. That way visible view will overlap invisible one. I revised you code:
您还可以使用 LinearLayout 的 FrameLayout insetad。这样可见视图将与不可见视图重叠。我修改了你的代码：
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent" >
<ProgressBar
android:id="@+id/progressbar"
style="?android:attr/progressBarStyleLarge"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_vertical|center_horizontal"
android:visibility="visible" />
<WebView
android:id="@+id/web_engine"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:visibility="gone" />
</FrameLayout>
