有没有办法在应用程序运行时更改语言

Question

大家。 :)我有一个多布局的应用程序，我正在尝试在运行应用程序时更改语言。我发现这段代码可以帮助我改变语言

using Android.Content;
using Android.OS;

using Java.Util;

namespace RuntimeAppLanguage
{
    internal class LanguageManager
    {
        private const string MYLANGUAGE = "myLanguage";
        private const string MYPREF = "myPreference";

        public static Context LoadLanguage(Context context)
        {
            var loadedLanguage = GetLanguage(context, Locale.Default.Language);
            return ChangeLanguage(context, loadedLanguage);
        }

        public static Context ChangeLanguage(Context context, string language)
        {
            SaveLanguage(context, language);
            if (Build.VERSION.SdkInt >= BuildVersionCodes.N)
            {
                return ChangeForAPI24(context, language);
            }
            return ChangeForLegacy(context, language);
        }

        private static string GetLanguage(Context context, string Language)
        {
            var privatePreference = context.GetSharedPreferences(MYPREF, FileCreationMode.Private);
            return privatePreference.GetString(MYLANGUAGE, Language);
        }

        private static void SaveLanguage(Context context, string language)
        {
            var privatePreference = context.GetSharedPreferences(MYPREF, FileCreationMode.Private);
            var editor = privatePreference.Edit();
            editor.PutString(MYLANGUAGE, language);
            editor.Apply();
        }

        private static Context ChangeForAPI24(Context context, string language)
        {
            // for api >= 24
            var locale = new Locale(language);
            Locale.Default = locale;
            var configuration = context.Resources.Configuration;
            configuration.SetLocale(locale);
            configuration.SetLayoutDirection(locale);

            return context.CreateConfigurationContext(configuration);
        }

        private static Context ChangeForLegacy(Context context, string language)
        {
            var locale = new Locale(language);
            Locale.Default = locale;
            var resources = context.Resources;
            var configuration = resources.Configuration;
            configuration.Locale = locale;
            resources.UpdateConfiguration(configuration, resources.DisplayMetrics);
            return context;
        }
    }
}

我试图让它在这个布局工作，但我最终得到循环:(

我正在尝试做的是当用户检查英语时阿拉伯语开关转到取消选中等等。

<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:minWidth="25px"
    android:minHeight="25px">
    <LinearLayout
        android:orientation="horizontal"
        android:minWidth="25px"
        android:minHeight="25px"
        android:layout_width="386.5dp"
        android:layout_height="wrap_content"
        android:id="@+id/linearLayout1"
        android:background="#ffb39ddb">
        <Button
            android:text="Back"
            android:layout_width="80.0dp"
            android:layout_height="match_parent"
            android:id="@+id/back"
            android:background="#ffb39ddb"
            android:drawableLeft="@drawable/arrowangle"
            android:textSize="18dp" />
        <TextView
            android:text="Languagus"
            android:layout_width="222.0dp"
            android:textColor="#FF010101"
            android:textSize="20dp"
            android:layout_height="match_parent"
            android:id="@+id/textView1"
            android:gravity="center"
        />
    </LinearLayout>
    <LinearLayout
        android:orientation="vertical"
        android:minWidth="25px"
        android:minHeight="25px"
        android:layout_width="match_parent"
        android:layout_height="134.5dp"
        android:id="@+id/linearLayout2"
        android:layout_marginTop="0.0dp"
        android:layout_below="@id/linearLayout1"
        android:background="#ffbdbdbd"
        >
        <Switch
            android:layout_width="match_parent"
            android:layout_height="59.0dp"
            android:id="@+id/switch1"
            android:background="#ffffffff"
            android:layout_marginTop="5dp"
            android:text="  English"
            android:textSize="25dp"
            android:textStyle="normal"
            android:checked="false" />
        <Switch
            android:layout_width="match_parent"
            android:layout_height="59.0dp"
            android:id="@+id/switch2"
            android:background="#ffffffff"
            android:layout_marginTop="5dp"
            android:text="  Arabic"
            android:textSize="25dp" />
    </LinearLayout>
</RelativeLayout>

请帮我 ：（

Answer 1

我用“中文”，“英文”和“泰国”写一个简单的样本，是否满足你的需求：

1. LanguageManager类，代码与上面相同。

2.MainActivity包括TextView和Button;

3.in BaseActivity

public class BaseActivity: AppCompatActivity
{
    protected override void AttachBaseContext(Context @base)
    {
        base.AttachBaseContext(LanguageManager.LoadLanguage(@base));
    }

}

4.in SettingActivity可以设置语言，axml类似于你的

public class SettingActivity : BaseActivity, CompoundButton.IOnCheckedChangeListener
{
    private Switch swCh;
    private Switch swEn;
    private Switch swTh;
    private Bundle s;
    protected override void OnCreate(Bundle savedInstanceState)
    {
        base.OnCreate(savedInstanceState);
        SetContentView(Resource.Layout.setting);
        // Create your application here
        initView();
    }

    private void initView()
    {
        Button back = FindViewById<Button>(Resource.Id.back);
        back.Click += delegate { Finish(); };
        swCh = FindViewById<Switch>(Resource.Id.switch1);
        swEn = FindViewById<Switch>(Resource.Id.switch2);
        swTh = FindViewById<Switch>(Resource.Id.switch3);
        var s = GetSharedPreferences("myPreference", FileCreationMode.Private).GetString( "myLanguage", Locale.Default.Language);
        switch (s)
        {
            case "ch":
                swCh.Checked = true;
                break;
            case "en":
                swEn.Checked = true;
                break;
            case "th":
                swTh.Checked = true;
                break;
        }
        swCh.SetOnCheckedChangeListener(this);
        swEn.SetOnCheckedChangeListener(this);
        swTh.SetOnCheckedChangeListener(this);
    }

    public void OnCheckedChanged(CompoundButton buttonView, bool isChecked)
    {
        if (isChecked)
        {

        switch (buttonView.Id)
        {
            case Resource.Id.switch1:
                swEn.Checked = false;
                swTh.Checked = false;
                LanguageManager.ChangeLanguage(this, "ch");
                break;
            case Resource.Id.switch2:
                swCh.Checked = false;
                swTh.Checked = false;
                LanguageManager.ChangeLanguage(this, "en");
                    break;
            case Resource.Id.switch3:
                swEn.Checked = false;
                swCh.Checked = false;
                LanguageManager.ChangeLanguage(this, "th");
                    break;
        }
             //restart application to change language
            Intent intent = new Intent(this, typeof(MainActivity));
            intent.SetFlags(ActivityFlags.ClearTask | ActivityFlags.NewTask);
            StartActivity(intent);
        }
    }

}

5.为每种语言创建包含strings的values-en，values-th

• a.values /串

  <string name="change_language">改变语言</string>
  <string name="setting">设置</string>
  <string name="chinese">中文</string>
  <string name="english">英语</string>
  <string name="thailand">泰语</string>

• b.values恩/串

  <string name="change_language">change language</string>
  <string name="setting">setting</string>
  <string name="chinese">chinese</string>
  <string name="english">english</string>
  <string name="thailand">thailand</string>

• c.values个/串

  <string name="change_language">เปลี่ยนภาษา</string>
  <string name="setting">เปลี่ย</string>
  <string name="chinese">ชาวจีน</string>
  <string name="english">อังกฤษ</string>
  <string name="thailand">ประเทศไทย</string>

ps：文本的所有内容都应使用@string/***，并且每种语言在values/string中使用相同的名称

喜欢这个效果：