添加许多模块时，区域设置的更改确实有效

Question

Locale 在有很多模块时有效。

上下文：

我们使用 Crowdin（这个库在上下文之上应用包装器）
当只有一个模块时，该应用程序可以完美运行
使用Appcompat:1.2
当更改语言环境有效时

但是，当我在 app 中添加新模块时，更改语言环境确实有效。 implementation project(":newmodule")

什么时候单模块:

BaseContext = CrowdinContextWrapper

什么时候多模块:

BaseContext = ContextThemeWrapper

Activity 扩展 BaseActivity

class MainActivity : BaseActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        Crowdin.forceUpdate(context = this)
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }
}

open class BaseActivity : AppCompatActivity() {
    override fun attachBaseContext(newBase: Context) {
        super.attachBaseContext(Crowdin.wrapContext(Localization.wrap(context = newBase)))
    }
}

class Localization(base: Context) : ContextThemeWrapper(base, R.style.AppTheme) {
    companion object {

        fun wrap(context: Context, language: String = "es", country: String = "MX"): ContextThemeWrapper {
            var ctx = context
            val config = context.resources.configuration

            if (language != "") {
                val locale = Locale(language, country)
                Locale.setDefault(locale)
                config.setLocale(locale)
                // Used setLayoutDirection for RTL and LTR
                config.setLayoutDirection(locale)
                ctx = context.createConfigurationContext(config)

            }

            return Localization(ctx)
        }
    }
}

Answer 1

说明

问题与 Appcompat 有关。根据 AppCompat 的版本，有两种不同的修复方法。由于您使用的是 1.2.0，因此您必须实施那个。

AppCompatDelegateImpl 最终删除了语言环境，因为本质上是 ContextThemeWrapper wraps your ContextWrapper. See the implementation @ AppCompatDelegateImpl.java line 368 . Also lines 388, and 480.

try {
                ContextThemeWrapperCompatApi17Impl.applyOverrideConfiguration(
                        (android.view.ContextThemeWrapper) baseContext, config);
                return baseContext;
            } catch (IllegalStateException e) {
                if (DEBUG) {
                    Log.d(TAG, "Failed to apply configuration to base context", e);
                }
            }

为此 work-around 是 over-ride getDelegate 在你的基地 Activity 内，像这样：

private var baseContextWrappingDelegate: AppCompatDelegate? = null

override fun getDelegate() = baseContextWrappingDelegate ?: BaseContextWrappingDelegate(super.getDelegate()).apply {
    baseContextWrappingDelegate = this
}

并且您还需要以下 class（参见：）。

package androidx.appcompat.app

import android.content.Context
import android.content.res.Configuration
import android.os.Bundle
import android.util.AttributeSet
import android.view.MenuInflater
import android.view.View
import android.view.ViewGroup
import androidx.appcompat.view.ActionMode
import androidx.appcompat.widget.Toolbar

class BaseContextWrappingDelegate(private val superDelegate: AppCompatDelegate) : AppCompatDelegate() {

    override fun getSupportActionBar() = superDelegate.supportActionBar

    override fun setSupportActionBar(toolbar: Toolbar?) = superDelegate.setSupportActionBar(toolbar)

    override fun getMenuInflater(): MenuInflater? = superDelegate.menuInflater

    override fun onCreate(savedInstanceState: Bundle?) {
        superDelegate.onCreate(savedInstanceState)
        removeActivityDelegate(superDelegate)
        addActiveDelegate(this)
    }

    override fun onPostCreate(savedInstanceState: Bundle?) = superDelegate.onPostCreate(savedInstanceState)

    override fun onConfigurationChanged(newConfig: Configuration?) = superDelegate.onConfigurationChanged(newConfig)

    override fun onStart() = superDelegate.onStart()

    override fun onStop() = superDelegate.onStop()

    override fun onPostResume() = superDelegate.onPostResume()

    override fun setTheme(themeResId: Int) = superDelegate.setTheme(themeResId)

    override fun <T : View?> findViewById(id: Int) = superDelegate.findViewById<T>(id)

    override fun setContentView(v: View?) = superDelegate.setContentView(v)

    override fun setContentView(resId: Int) = superDelegate.setContentView(resId)

    override fun setContentView(v: View?, lp: ViewGroup.LayoutParams?) = superDelegate.setContentView(v, lp)

    override fun addContentView(v: View?, lp: ViewGroup.LayoutParams?) = superDelegate.addContentView(v, lp)

    override fun attachBaseContext2(context: Context) = wrap(superDelegate.attachBaseContext2(super.attachBaseContext2(context)))

    override fun setTitle(title: CharSequence?) = superDelegate.setTitle(title)

    override fun invalidateOptionsMenu() = superDelegate.invalidateOptionsMenu()

    override fun onDestroy() {
        superDelegate.onDestroy()
        removeActivityDelegate(this)
    }

    override fun getDrawerToggleDelegate() = superDelegate.drawerToggleDelegate

    override fun requestWindowFeature(featureId: Int) = superDelegate.requestWindowFeature(featureId)

    override fun hasWindowFeature(featureId: Int) = superDelegate.hasWindowFeature(featureId)

    override fun startSupportActionMode(callback: ActionMode.Callback) = superDelegate.startSupportActionMode(callback)

    override fun installViewFactory() = superDelegate.installViewFactory()

    override fun createView(parent: View?, name: String?, context: Context, attrs: AttributeSet): View? = superDelegate.createView(parent, name, context, attrs)

    override fun setHandleNativeActionModesEnabled(enabled: Boolean) {
        superDelegate.isHandleNativeActionModesEnabled = enabled
    }

    override fun isHandleNativeActionModesEnabled() = superDelegate.isHandleNativeActionModesEnabled

    override fun onSaveInstanceState(outState: Bundle?) = superDelegate.onSaveInstanceState(outState)

    override fun applyDayNight() = superDelegate.applyDayNight()

    override fun setLocalNightMode(mode: Int) {
        superDelegate.localNightMode = mode
    }

    override fun getLocalNightMode() = superDelegate.localNightMode

    private fun wrap(context: Context): Context {
        //Put wrapping implementation here
    }
}

添加许多模块时，区域设置的更改确实有效

changes in locale does work when add many modules

android

locale

android-context

kotlin

crowdin

说明

参考资料