CODEWITHSUNDEEP
android
Fabián Romo
Fabián Romo

Reputation: 329

Why does not my application change language?

In an activity I did the following to change the language of the app:

    private void changeLanguage(String stringLanguage){
        Locale locale = new Locale(stringLanguage);
        Locale.setDefault(locale);
        Configuration config = new Configuration();
        config.locale = locale;
        getBaseContext().getResources().updateConfiguration(config,getBaseContext().getResources().getDisplayMetrics());

        Intent refresh = new Intent(ActLanguage.this, ActLanguage.class);
        startActivity(refresh);
        finish();
    }

But only that activity changes language, all the other activities that the project contains remain in the original language.

Any suggestions or comments are welcome.

Upvotes: 1

Views: 198

Answers (3)

Khemraj Sharma
Khemraj Sharma

Reputation: 58934

Some workaround for changing app language would be.

  • Set language once when user change. and change language automatically when user start app next time.
  • You can save user preferred language and set next time when app opens.

This does not work because you did not call onConfigurationChanged().

This would be your application class. You can change language by calling method.

AppContext.getInstance().changeLanguage("en");
Intent refresh = new Intent(ActLanguage.this, ActLanguage.class);
finish();        
startActivity(refresh);

and AppContext.java class

import android.app.Application;
import android.content.SharedPreferences;
import android.content.res.Configuration;
import java.util.Locale;


public class AppContext extends Application {
    public static final String PREFERENCE = "NYPrefsFile";
    public static final String KEY_LANG = "LANG";
    private static AppContext mApp = null;

    @Override
    public void onCreate() {
        super.onCreate();
        mApp = this;
        setLanguage();
        sp = getSharedPreferences(PREFERENCE, 0);
    }

    public synchronized static AppContext getInstance() {
        return mApp;
    }

    public void setLanguage() {
        String lang = getStringData(KEY_LANG);
        changeLanguage(lang);
    }

    public String getCurrentLanguage() {
        if (config == null)
            config = getApplicationContext().getResources().getConfiguration();
        return config.locale.getLanguage();
    }

    Configuration config;

    public void changeLanguage(String lang) {
        if (config == null)
            config = getApplicationContext().getResources().getConfiguration();
        Locale locale = new Locale(lang);
        Locale.setDefault(locale);
        config.locale = locale;
        getApplicationContext().getResources().updateConfiguration(config, getApplicationContext().getResources().getDisplayMetrics());
        setStringData(KEY_LANG, lang);
        onConfigurationChanged(config);
    }


    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
    }

    private SharedPreferences sp;

    public String getStringData(String pKey) {
        return sp.getString(pKey, "");
    }

    public void setStringData(String pKey, String pData) {
        SharedPreferences.Editor editor = sp.edit();
        editor.putString(pKey, pData);
        editor.apply();
    }
}

In AndroidManifest.xml

<application
    android:name=".AppContext"

Update:

You will start your home activity with clearing back-stack to load all activities with new language.

Intent intent = new Intent(this, HomeActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK); 
startActivity(intent);
finish(); // call this to finish the current activity

Upvotes: 1

Fabi&#225;n Romo
Fabi&#225;n Romo

Reputation: 329

The solution was:

  Intent refresh = new Intent(ActIdioma.this, ActMAINACTIVITY.class);
        refresh.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP| Intent.FLAG_ACTIVITY_NEW_TASK);
        startActivity(refresh);
finish();

Calling the main activity, all the others change language.

Upvotes: 0

khetanrajesh
khetanrajesh

Reputation: 300

Do if from the Application context and not from the Activity context. Use getApplicationContext() .

Also use createConfigurationContext from API 25 as updateConfiguration is deprecated .

Upvotes: 0

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