improve rus translation

leankeykeyboard/src/main/java/com/liskovsoft/utils/LangUpdater.java

@@ -0,0 +1,127 @@
+package com.liskovsoft.utils;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.ResolveInfo;
+import android.content.res.Configuration;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.StringTokenizer;
+
+public class LangUpdater {
+    private static final String LOCALE_EN_US = "en_US";
+    private static final String LOCALE_RU = "ru_RU";
+    private Context mContext;
+    private String[] rusPackages = {"dkc.androidtv.tree", "dkc.video.fsbox", "dkc.video.hdbox", "dkc.video.uatv"};
+
+    public LangUpdater(Context ctx) {
+        mContext = ctx;
+    }
+
+    public void update() {
+        tryToEnableRussian();
+        tryToForceEnglishOnDevices();
+        tryToRestoreLanguage();
+    }
+
+    private void tryToRestoreLanguage() {
+        String langCode = getPreferredLocale();
+        if (langCode != null) {
+            forceLocale(langCode);
+        }
+    }
+
+    private void tryToForceEnglishOnDevices() {
+        String deviceName = Helpers.getDeviceName();
+        switch (deviceName) {
+            case "ChangHong Android TV (full_mst638)":
+                forceLocale(LOCALE_EN_US);
+        }
+    }
+
+    private void tryToBypassChinese() {
+        String script = LocaleUtility.getScript(Locale.getDefault());
+        if (isChineseScript(script)) {
+            forceLocale(LOCALE_EN_US);
+        }
+    }
+
+    private boolean isChineseScript(String script) {
+        switch (script) {
+            case "Hani":
+            case "Hans":
+            case "Hant":
+                return true;
+        }
+        return false;
+    }
+
+    private void tryToEnableRussian() {
+        List<String> installedPackages = getListInstalledPackages();
+        for (String pkgName : installedPackages) {
+            if (isRussianPackage(pkgName)) {
+                forceLocale(LOCALE_RU);
+            }
+        }
+    }
+
+    // short lang code. ex: "ru"
+    private void forceLocale(String langCode) {
+        if (langCode == null || langCode.isEmpty()) {
+            return;
+        }
+
+        Locale locale = parseLangCode(langCode);
+        Locale.setDefault(locale);
+        Configuration config = mContext.getResources().getConfiguration();
+        config.locale = locale;
+        mContext.getResources().updateConfiguration(config,
+                mContext.getResources().getDisplayMetrics());
+    }
+
+    private boolean isRussianPackage(String pkgName) {
+        for (String rusPackage : rusPackages) {
+            if (rusPackage.equals(pkgName)){
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private List<String> getListInstalledPackages() {
+        Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
+        mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
+        List<ResolveInfo> pkgAppsList = mContext.getPackageManager().queryIntentActivities( mainIntent, 0);
+        List<String> result = new ArrayList<>();
+        for (ResolveInfo info : pkgAppsList) {
+            result.add(info.activityInfo.packageName);
+        }
+        return result;
+    }
+
+    public String getLocale() {
+        Configuration config = mContext.getResources().getConfiguration();
+        return config.locale.getLanguage();
+    }
+
+    /**
+     * Get locale as lang code (e.g. zh, ru_RU etc)
+     * @return lang code
+     */
+    public String getPreferredLocale() {
+        return LeanKeyPreferences.instance(mContext).getPreferredLanguage();
+    }
+
+    public void setPreferredLocale(String langCode) {
+        LeanKeyPreferences.instance(mContext).setPreferredLanguage(langCode);
+    }
+
+    private Locale parseLangCode(String langCode) {
+        StringTokenizer tokenizer = new StringTokenizer(langCode, "_");
+        String lang = tokenizer.nextToken();
+        String country = tokenizer.hasMoreTokens() ? tokenizer.nextToken() : "";
+        return new Locale(lang, country);
+    }
+}