安卓：设置窗口的背景上展开活动 [英] Android: Setting Window Background on launched Activity

问题描述

所以，我读过罗曼盖伊的博客文章上设置窗口背景和percieved性能，并正尝试模仿的。它是这样一个简单的解决方案，不知道为什么我不能得到这个工作，但活动只是拒绝回升定向背景。

So I've read Romain Guy's blog post on setting the Window background and percieved performance, and am trying to emulate that. It is such a simple solution and not sure why I can't get this working, but the activity simply refuses to pick-up the directed background.

我有一个ListView的onListItemClick启动一个新的活动，即需要3-5秒，完全负荷。当用户在等待，我想画一个windowBackground，让他们'看'的活动是真的准备好了。这是我的code：

I have a ListView that onListItemClick launches a new Activity, one that takes 3-5 seconds to fully load. While the user is waiting, I'd like to draw a windowBackground so that they 'see' the activity before it is actually ready. Here's my code:

AndroidManifest片段的推出活动：

AndroidManifest snippet for the launched Activity:

<activity 
        android:name=".activity.EditorActivity"
        android:screenOrientation="portrait"
        android:windowBackground="@drawable/background_editor">

对于EditorActivity的XML布局：

The XML layout for the EditorActivity:

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView 
    android:id="@+id/editor"
    android:layout_height="wrap_content"
    android:layout_width="match_parent"
    android:text="Editor" />
</FrameLayout>

最后，绘制的清单，background_editor.xml被设置：

And finally, the drawable being set in the Manifest, background_editor.xml:

<?xml version="1.0" encoding="utf-8"?>
<bitmap xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@drawable/editor_bg"
    android:tileMode="repeat" />

editor_bg是位于.png文件的诠释，他绘制的文件夹。

editor_bg is a .png file located int he drawable folder.

最后的结果是被推出的EditorActivity，而我看到的是默认的黑色背景，白色显示的编辑文本（我补充说，测试的XML文件被正确加载。

The end result is the EditorActivity gets launched, and all I see is the default black background with the "Editor" text displayed in white (I added that to test that the XML file was loading correctly.

我也试着通过Android上的FrameLayout和TextView的背景设置为透明：背景=@机器人：彩色/透明，想着也许他们默认为黑色背景，但没有运气

I've also tried setting the background of the FrameLayout and TextView to transparent via android:background="@android:color/transparent", thinking maybe they were defaulting to a black background, but no luck.

这是一个漫长的几天，我敢肯定，我失去了一些东西简单...任何明显的失误我想提出？

It's been a long few days, I'm sure I am missing something simple... any obvious mistakes I am making here?

推荐答案

尝试设置窗口背景编程方式推出新的活动之前。

Try setting window background before launching the new activity programmatically.

getWindow().setBackgroundDrawableResource(R.drawable.my_drawable);

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