当设备改变方向的android更改用户界面 [英] Change User interface when device change the orientation android

问题描述

我有一个屏幕，显示该不同的用户界面时，设备lanscape和肖像。它显示了一个的ListView 当设备是纵向，它显示了一个的GridView 当设备lanscape。 它看起来像YouTube应用程序或谷歌Play商店应用。

I have a screen, that show different user interface when device is lanscape and portrait. It shows a ListView when device is portrait, and it shows a GridView when device is lanscape. It looks like youtube app or google play store app.

感谢您阅读和回答我的问题。

Thanks for reading and answering my question.

编辑：我想补充一下我的问题的详细信息：

I want to add more details about my question:

• 在我使用的片段来管理这一观点。
• 在我需要保存所有数据，并在此视图时，它旋转（避免重装大量的数据）。
• 我尝试添加机器人：configChanges的清单和使用onConfigurationChanged在这个片段。但事实并非如此成功。

我希望看到具体的例子或详细解决方案。 但是，任何答案拨款。 谢谢

I hope see the particular example or a detail solution. But any answer is appropriated. Thanks

推荐答案

有两件事情来开发，此功能。

There is two things to develop this functionnality.

首先，你将不得不作出两个不同的布局：

First you will have to make two different layouts:

res
|- layout
   |- mylayout.xml
|- layout-land.xml
   |- mylayout.xml

在布局/ mylayout.xml 文件，包括的ListView 在你需要它和布局陆/ mylayout.xml ，包括你的的GridView 。

In the layout/mylayout.xml file, include a ListView where you need it and in layout-land/mylayout.xml, include your GridView.

Android将自动选择正确的布局，这取决于当前的屏幕方向，当你调用的setContentView 。

Android will select automatically the correct layout, depending of the current screen orientation, when you call setContentView.

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.mylayout);
    mListView = (ListView) findViewById(R.id.mylistview);
    mGridView = (GridView) findViewById(R.id.mygridview);
    // !!!!!!!
    // mListView will be null in landscape
    // mGridView will be null in portrait
    // !!!!!!!
}

setContentView(R.layout.mylayout);

现在，在code，你将需要检查你是哪个方向，使if / else语句。

Now, in code you will need to check in which orientation you are to make if/else statements.

要检测它的方向你，遵循以下规定：

To detect in which orientation you are, follow the following states:

1. 创建一个文件 RES /价值/ bool.xml

<resources>
    <bool name="isLandscape">false</bool>
</resources>

创建 RES /值陆/ bool.xml文件

<resources>
   <bool name="isLandscape">true</bool>
</resources>

现在在你的活动，你可以很容易地测试，每次你需要，如果你在横向或纵向模式，并应用相应的动作时间

Now in your activity you can easily test, every time you need, if you are in landscape or portrait mode and apply the corresponding action

boolean landscape = getResources().getBoolean(R.bool.isLandscape);
if (landscape) {
    // do something with your GridView
} else {
    // do something with your ListView
}

要响应您的编辑：

片段非常相似的活动此

如果你想保存过程中方向变化的数据，按照关于这个主题，尤其是上<一部分href="http://developer.android.com/guide/topics/resources/runtime-changes.html#RetainingAnObject">Retaining对象在更改配置。

If you want to save data during orientation change, follow the official documentation on this topic, especially the part on Retaining an Object During a Configuration Change.

您不应使用安卓-changes.html＃HandlingTheChange>在文档：

处理配置改变自己可以使它更   很难使用替代资源，因为该系统并不   自动应用它们。该技术，应考虑   当你必须避免重新启动由于配置不得已   改变，因此不建议对大多数应用程序。

Handling the configuration change yourself can make it much more difficult to use alternative resources, because the system does not automatically apply them for you. This technique should be considered a last resort when you must avoid restarts due to a configuration change and is not recommended for most applications.

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