Implement multi-language support with language selection screen

app/src/main/AndroidManifest.xml

@@ -7,6 +7,7 @@
     <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
 
     <application
+        android:name=".UpdateAppApplication"
         android:allowBackup="true"
         android:dataExtractionRules="@xml/data_extraction_rules"
         android:fullBackupContent="@xml/backup_rules"

app/src/main/java/com/example/updateapp/Helpers/LocaleHelper.java

@@ -0,0 +1,54 @@
+package com.example.updateapp.Helpers;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.res.Configuration;
+import android.content.res.Resources;
+import android.os.Build;
+
+import java.util.Locale;
+
+public class LocaleHelper {
+    private static final String PREFS_NAME = "app_prefs";
+    private static final String KEY_LANGUAGE = "selected_language";
+
+    public static void setLocale(Context context, String languageCode) {
+        Locale locale = new Locale(languageCode);
+        Locale.setDefault(locale);
+
+        Configuration configuration = context.getResources().getConfiguration();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            configuration.setLocale(locale);
+        } else {
+            configuration.locale = locale;
+        }
+
+        context.getResources().updateConfiguration(configuration, context.getResources().getDisplayMetrics());
+
+        // Save language preference
+        SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+        prefs.edit().putString(KEY_LANGUAGE, languageCode).apply();
+    }
+
+    public static Context attachBaseContext(Context context) {
+        String languageCode = getSavedLanguage(context);
+        Locale locale = new Locale(languageCode);
+        Locale.setDefault(locale);
+
+        Configuration configuration = context.getResources().getConfiguration();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
+            configuration.setLocale(locale);
+            return context.createConfigurationContext(configuration);
+        } else {
+            configuration.locale = locale;
+            context.getResources().updateConfiguration(configuration, context.getResources().getDisplayMetrics());
+            return context;
+        }
+    }
+
+    public static String getSavedLanguage(Context context) {
+        SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+        return prefs.getString(KEY_LANGUAGE, "en"); // Default to English
+    }
+}
+

app/src/main/java/com/example/updateapp/MainActivity.java

@@ -1,9 +1,11 @@
 package com.example.updateapp;
 
+import android.content.Context;
 import android.os.Bundle;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentTransaction;
+import com.example.updateapp.Helpers.LocaleHelper;
 import com.example.updateapp.databinding.ActivityMainBinding;
 import com.example.updateapp.views.fragments.ChatbotFragment;
 import com.example.updateapp.views.fragments.ProfileFragment;
@@ -54,4 +56,9 @@ private void loadFragment(Fragment fragment) {
         transaction.commit();
     }
 
+    @Override
+    protected void attachBaseContext(Context newBase) {
+        super.attachBaseContext(LocaleHelper.attachBaseContext(newBase));
+    }
+
 }

app/src/main/java/com/example/updateapp/UpdateAppApplication.java

@@ -0,0 +1,14 @@
+package com.example.updateapp;
+
+import android.app.Application;
+import android.content.Context;
+
+import com.example.updateapp.Helpers.LocaleHelper;
+
+public class UpdateAppApplication extends Application {
+    @Override
+    protected void attachBaseContext(Context base) {
+        super.attachBaseContext(LocaleHelper.attachBaseContext(base));
+    }
+}
+

app/src/main/java/com/example/updateapp/adapters/LanguageAdapter.java

@@ -0,0 +1,74 @@
+package com.example.updateapp.adapters;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.recyclerview.widget.RecyclerView;
+
+import com.example.updateapp.R;
+import com.example.updateapp.models.LanguageModel;
+
+import java.util.List;
+
+public class LanguageAdapter extends RecyclerView.Adapter<LanguageAdapter.ViewHolder> {
+
+    private List<LanguageModel> languageList;
+    private OnLanguageClickListener listener;
+
+    public interface OnLanguageClickListener {
+        void onLanguageClick(LanguageModel language);
+    }
+
+    public LanguageAdapter(List<LanguageModel> languageList, OnLanguageClickListener listener) {
+        this.languageList = languageList;
+        this.listener = listener;
+    }
+
+    @NonNull
+    @Override
+    public ViewHolder onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {
+        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_language, parent, false);
+        return new ViewHolder(view);
+    }
+
+    @Override
+    public void onBindViewHolder(@NonNull ViewHolder holder, int position) {
+        LanguageModel language = languageList.get(position);
+        holder.languageName.setText(language.getLanguageName());
+        holder.selectedIcon.setVisibility(language.isSelected() ? View.VISIBLE : View.GONE);
+
+        holder.itemView.setOnClickListener(v -> {
+            if (listener != null) {
+                listener.onLanguageClick(language);
+            }
+        });
+    }
+
+    @Override
+    public int getItemCount() {
+        return languageList.size();
+    }
+
+    public void updateSelection(String selectedLanguageCode) {
+        for (LanguageModel language : languageList) {
+            language.setSelected(language.getLanguageCode().equals(selectedLanguageCode));
+        }
+        notifyDataSetChanged();
+    }
+
+    public class ViewHolder extends RecyclerView.ViewHolder {
+        TextView languageName;
+        ImageView selectedIcon;
+
+        public ViewHolder(@NonNull View itemView) {
+            super(itemView);
+            languageName = itemView.findViewById(R.id.txt_language_name);
+            selectedIcon = itemView.findViewById(R.id.img_selected);
+        }
+    }
+}
+

app/src/main/java/com/example/updateapp/models/LanguageModel.java

@@ -0,0 +1,38 @@
+package com.example.updateapp.models;
+
+public class LanguageModel {
+    private String languageCode;
+    private String languageName;
+    private boolean isSelected;
+
+    public LanguageModel(String languageCode, String languageName, boolean isSelected) {
+        this.languageCode = languageCode;
+        this.languageName = languageName;
+        this.isSelected = isSelected;
+    }
+
+    public String getLanguageCode() {
+        return languageCode;
+    }
+
+    public void setLanguageCode(String languageCode) {
+        this.languageCode = languageCode;
+    }
+
+    public String getLanguageName() {
+        return languageName;
+    }
+
+    public void setLanguageName(String languageName) {
+        this.languageName = languageName;
+    }
+
+    public boolean isSelected() {
+        return isSelected;
+    }
+
+    public void setSelected(boolean selected) {
+        isSelected = selected;
+    }
+}
+

app/src/main/java/com/example/updateapp/views/activites/ForgetActivity.java

@@ -1,6 +1,7 @@
 package com.example.updateapp.views.activites;
 
 import android.app.ProgressDialog;
+import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
@@ -9,6 +10,7 @@
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatActivity;
 
+import com.example.updateapp.Helpers.LocaleHelper;
 import com.example.updateapp.databinding.ActivityForgetBinding;
 import com.google.android.gms.tasks.OnCompleteListener;
 import com.google.android.gms.tasks.Task;
@@ -81,4 +83,9 @@ public void onClick(View v) {
             }
         });
     }
+
+    @Override
+    protected void attachBaseContext(Context newBase) {
+        super.attachBaseContext(LocaleHelper.attachBaseContext(newBase));
+    }
 }

app/src/main/java/com/example/updateapp/views/activites/LanguageActivity.java

@@ -1,17 +1,36 @@
 package com.example.updateapp.views.activites;
 
+import android.content.Context;
+import android.content.Intent;
 import android.os.Bundle;
+import android.view.View;
+import android.widget.ImageView;
+import android.widget.TextView;
 
 import androidx.activity.EdgeToEdge;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.core.graphics.Insets;
 import androidx.core.view.ViewCompat;
 import androidx.core.view.WindowInsetsCompat;
+import androidx.recyclerview.widget.LinearLayoutManager;
+import androidx.recyclerview.widget.RecyclerView;
 
+import com.example.updateapp.Helpers.LocaleHelper;
+import com.example.updateapp.Helpers.SaveState;
 import com.example.updateapp.R;
+import com.example.updateapp.adapters.LanguageAdapter;
+import com.example.updateapp.models.LanguageModel;
+
+import java.util.ArrayList;
+import java.util.List;
 
 public class LanguageActivity extends AppCompatActivity {
 
+    private RecyclerView recyclerView;
+    private LanguageAdapter adapter;
+    private List<LanguageModel> languageList;
+    private String currentLanguageCode;
+
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
@@ -22,5 +41,90 @@ protected void onCreate(Bundle savedInstanceState) {
             v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
             return insets;
         });
+
+        // Initialize views
+        recyclerView = findViewById(R.id.rev_langauge);
+        TextView titleText = findViewById(R.id.txt_title);
+        ImageView doneButton = findViewById(R.id.img_done);
+
+        // Get current language
+        currentLanguageCode = LocaleHelper.getSavedLanguage(this);
+
+        // Setup RecyclerView
+        languageList = createLanguageList();
+        adapter = new LanguageAdapter(languageList, this::onLanguageSelected);
+        recyclerView.setLayoutManager(new LinearLayoutManager(this));
+        recyclerView.setAdapter(adapter);
+
+        // Update selection UI
+        adapter.updateSelection(currentLanguageCode);
+
+        // Done button click handler
+        doneButton.setOnClickListener(v -> {
+            // Check if this is first launch
+            boolean isFirstLaunch = getIntent().getBooleanExtra("isFirstLaunch", false);
+            if (isFirstLaunch) {
+                // Mark language as selected and go to onboarding
+                SaveState languageState = new SaveState(this, "LANGUAGE_SELECTED");
+                languageState.setState(1);
+                Intent intent = new Intent(LanguageActivity.this, OnboardingActivity.class);
+                startActivity(intent);
+            }
+            finish();
+        });
+
+        // Set title
+        titleText.setText(getString(R.string.language));
+    }
+
+    private List<LanguageModel> createLanguageList() {
+        List<LanguageModel> list = new ArrayList<>();
+        String[] languageCodes = {"en", "zh", "hi", "es", "ar", "fr", "bn", "pt", "ru", "ur"};
+        String[] languageNames = {
+            getString(R.string.language_english),
+            getString(R.string.language_chinese),
+            getString(R.string.language_hindi),
+            getString(R.string.language_spanish),
+            getString(R.string.language_arabic),
+            getString(R.string.language_french),
+            getString(R.string.language_bengali),
+            getString(R.string.language_portuguese),
+            getString(R.string.language_russian),
+            getString(R.string.language_urdu)
+        };
+
+        for (int i = 0; i < languageCodes.length; i++) {
+            boolean isSelected = languageCodes[i].equals(currentLanguageCode);
+            list.add(new LanguageModel(languageCodes[i], languageNames[i], isSelected));
+        }
+
+        return list;
+    }
+
+    private void onLanguageSelected(LanguageModel language) {
+        String selectedLanguageCode = language.getLanguageCode();
+
+        if (!selectedLanguageCode.equals(currentLanguageCode)) {
+            // Save and apply new language
+            LocaleHelper.setLocale(this, selectedLanguageCode);
+
+            // Mark language as selected (for first launch)
+            SaveState languageState = new SaveState(this, "LANGUAGE_SELECTED");
+            languageState.setState(1);
+
+            // Update current language
+            currentLanguageCode = selectedLanguageCode;
+
+            // Update adapter selection
+            adapter.updateSelection(selectedLanguageCode);
+
+            // Restart activity to apply language changes immediately
+            recreate();
+        }
+    }
+
+    @Override
+    protected void attachBaseContext(Context newBase) {
+        super.attachBaseContext(LocaleHelper.attachBaseContext(newBase));
     }
 }