improve rus translation

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

@@ -0,0 +1,45 @@
+package com.liskovsoft.utils;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+
+public final class LeanKeyPreferences {
+    private static final String APP_RUN_ONCE = "appRunOnce";
+    private static final String BOOTSTRAP_SELECTED_LANGUAGE = "bootstrapSelectedLanguage";
+    private static LeanKeyPreferences sInstance;
+    private final Context mContext;
+    private SharedPreferences mPrefs;
+
+    public static LeanKeyPreferences instance(Context ctx) {
+        if (sInstance == null)
+            sInstance = new LeanKeyPreferences(ctx);
+        return sInstance;
+    }
+
+    public LeanKeyPreferences(Context context) {
+        mContext = context.getApplicationContext();
+        mPrefs = PreferenceManager.getDefaultSharedPreferences(mContext);
+    }
+
+    public boolean isRunOnce() {
+        return mPrefs.getBoolean(APP_RUN_ONCE, false);
+    }
+
+    public void setRunOnce(boolean runOnce) {
+        mPrefs.edit()
+                .putBoolean(APP_RUN_ONCE, runOnce)
+                .apply();
+    }
+
+    public void setPreferredLanguage(String name) {
+        mPrefs.edit()
+                .putString(BOOTSTRAP_SELECTED_LANGUAGE, name)
+                .apply();
+    }
+
+    public String getPreferredLanguage() {
+        String name = mPrefs.getString(BOOTSTRAP_SELECTED_LANGUAGE, "");
+        return name;
+    }
+}