android 切换APP语言问题

问题：

1.当手机语言与app语言不同时退出app,再次进入时就会出现（例如：当我手机默认是英语时，我进入APP,选择简体或繁体,退出app,再次进入APP问题就出现了）

2.华为简繁切换失败

解决：

1.由于迁移AndroidX 夜间模式导致的

com.google.android.material:material:1.0.3 回滚到这个版本无问题

com.google.android.material:material:1.1.0 解决 在applyOverrideConfiguration中添加

...
@Override
public void applyOverrideConfiguration(Configuration overrideConfiguration) {
// 兼容androidX在部分手机切换语言失败问题
if (overrideConfiguration != null) {
int uiMode = overrideConfiguration.uiMode;
overrideConfiguration.setTo(getBaseContext().getResources().getConfiguration());
overrideConfiguration.uiMode = uiMode;
}
super.applyOverrideConfiguration(overrideConfiguration);
}
...

androidx.appcompat:appcompat:1.2.0

在androidx.appcompat.app包下创建类BaseContextWrappingDelegate

...

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  findViewById(id: Int) = superDelegate.findViewById(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 {
    TODO("your wrapping implementation here")
}

}

...

在Activity基类中添加

...

private var baseContextWrappingDelegate: AppCompatDelegate? = null

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

...

2.华为9.0手机语言检测繁体为“zh_CN_#Hant”，简体返回”zh_CN_#Hans“