Android:以编程方式更改整个应用布局的方向 [英] Android : Change entire app layout directions programmatically

问题描述

如何将整个应用程序布局方向更改为RTL? 我正在编写一个应用程序，用户必须在首次启动时选择其语言，布局应根据用户选择更改为RTL或保持LTR. 我曾经为每种布局将android:supportsRtl="true"添加到AndroidManifest和android:layoutDirection="rtl"中，但是这种方法存在如下问题:

How can I change entire app layout direction to RTL? I am writing an app that user must select it's language in first launch and the layout should change based on user selection to RTL or remains LTR. I used to add android:supportsRtl="true" to the AndroidManifest and android:layoutDirection="rtl" for each layout but this approach have some problems like below :

一个问题是，当我将方向更改为RTL时，ActionBar主页图标或导航按钮(启用主页向上功能时)仍保持LRT并向右移动.

One problem is when I change the direction to RTL the ActionBar home icon or navigation button (when home as up is enabled) remains LRT and just move to the right.

我还尝试通过编程方式改变方向，结果是相同的:

I also tried to change direction programmatically and the result was the same :

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){
            getWindows().getDecorView().setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
        }

是否有任何方法可以强制所有活动立即变为RTL，或者我们应该分别为每个活动设定方向?

Is there any way to force all activities to become RTL at once or we should set direction in each activity separately?

推荐答案

您可以在应用程序的 minSdk> = 17 时使用这段代码.

You can use this piece of code while your application's minSdk >= 17.

我将fa用于Farsi，您可以使用其他 rtl 语言.

I used fa for Farsi, you can use other rtl language.

Configuration configuration = getResources().getConfiguration();
configuration.setLayoutDirection(new Locale("fa"));
getResources().updateConfiguration(configuration, getResources().getDisplayMetrics());

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