How to switch between two languages in android app programmatically? [duplicate]

You can use Android-LocalizationActivity

Here an excerpt from the documentation:

Keep calm and stay easy with multiple language supported in your android application.

It's basic for android application to be supported multiple languages. Yeah! It's very easy because android has String Resource. Developer just had to prepare the text for different languages then android system will use itself. But frequently problem is "On-time Language Changing". Because the String Resource was designed to be depending on current device language. but if we want to change the language by click some button. It will be difficult to handle it. This problem will solved because I have created a new library to handle application language. It called "Localization Activity" library.

Here the example to use it from the documentation:

import android.os.Bundle; import android.view.View; import com.akexorcist.localizationactivity.LocalizationActivity; public class MainActivity extends LocalizationActivity implements View.OnClickListener { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_simple); findViewById(R.id.btn_th).setOnClickListener(this); findViewById(R.id.btn_en).setOnClickListener(this); } @Override public void onClick(View v) { int id = v.getId(); if (id == R.id.btn_en) { setLanguage("en"); } else if (id == R.id.btn_th) { setLanguage("th"); } } } 

In the example above, when user click on a button. It will change to English or Thai language.

You can use the locale class to do this .Hope this helps

 public class LocaleLanguage { private static Locale mLocale; public static void setLocale(Locale locale) { mLocale = locale; if(mLocale != null) { Locale.setDefault(mLocale); } } public static void updateConfig(ContextThemeWrapper wrapper) { if(mLocale != null && Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1) { Configuration configuration = new Configuration(); configuration.setLocale(mLocale); wrapper.applyOverrideConfiguration(configuration); } } public static void updateConfig(Application app, Configuration configuration) { if(mLocale != null && Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN_MR1) { //Wrapping the configuration to avoid Activity endless loop Configuration config = new Configuration(configuration); config.locale = mLocale; Resources res = app.getBaseContext().getResources(); res.updateConfiguration(config, res.getDisplayMetrics()); } } } 

here is the application class

 public class App extends Application { public void onCreate(){ super.onCreate(); // get user preferred language set locale accordingly new locale(language,country) LocaleUtils.setLocale(new Locale("iw")); LocaleUtils.updateConfig(this, getBaseContext().getResources().getConfiguration()); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); LocaleUtils.updateConfig(this, newConfig); } } 

here is the your activity

 public class MainActivity extends Activity { public BaseActivity() { LocaleUtils.updateConfig(this); } } 

And for more refer this link for whole tutorial refer this link