bircastri bircastri - 6 months ago 196
Android Question

How to change language of Android app programmatically?

I want to change the language programmatically of my Android Application.

So I have build two xml file.

values-it
-->string.xml

values-en
-->string.xml


This is the code in MainActivity to change the language of all application:

//ITALIAN

Resources res = getApplicationContext().getResources();
DisplayMetrics dm = res.getDisplayMetrics();
android.content.res.Configuration conf = res.getConfiguration();
conf.locale = new Locale("it");
res.updateConfiguration(conf, dm);


//ENGLISH

Resources res2 = getApplicationContext().getResources();
DisplayMetrics dm2 = res2.getDisplayMetrics();
android.content.res.Configuration conf2 = res2.getConfiguration();
conf2.locale = new Locale("en");
res2.updateConfiguration(conf2, dm2);


Now if I call english language (for example) the code is execute never error but the label not change the text, if I change the orientation of the Device, the label change the text correctly.

Now how can I modify my code the refresh the label automatically?

Answer
 AlertDialog.Builder builder = new AlertDialog.Builder(DashboardActivity.this);
            builder.setTitle(R.string.languages);
            // Add the buttons
            builder.setPositiveButton(R.string.english, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    String languageToLoad = "en"; // your language
                    Locale locale = new Locale(languageToLoad);
                    Locale.setDefault(locale);
                    Configuration config = new Configuration();
                    config.locale = locale;
                    getBaseContext().getResources().updateConfiguration(config,
                            getBaseContext().getResources().getDisplayMetrics());
                    dialog.dismiss();
                    rEditor.putString("language", languageToLoad);
                    rEditor.commit();



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

                }
            });
            builder.setNegativeButton(R.string.gujarati, new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    // User cancelled the dialog

                    String languageToLoad = "gu"; // your language
                    Locale locale = new Locale(languageToLoad);
                    Locale.setDefault(locale);
                    Configuration config = new Configuration();
                    config.locale = locale;
                    getBaseContext().getResources().updateConfiguration(config,
                            getBaseContext().getResources().getDisplayMetrics());
                    dialog.dismiss();
                    rEditor.putString("language", languageToLoad);
                    rEditor.commit();


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

                }
            });

            builder.create().show();

you have to reload activity to show new language text means restart.