Android How to change language programaticaly

Android How to change language programaticaly


Hello Friends

This My new blog . Here i am simply explain you how to change language programaticaly in you app .

just simple step are below

1. prepair a string resource for the four language (English , hindi , marathi , russian)

1. <resources>
2. <string name="app_name">ChangeLocaleExample</string>
3. <string name="hello_world">Hello World</string>
4. <string name="btn_en">English</string>
5. <string name="btn_ru">Russian</string>
6. <string name="btn_de">German</string>
7. <string name="btn_fr">French</string>
8. </resources>

Source code values-ru/strings.xml (Russian)

1. <resources>
2. <string name="hello_world">Привет, Мир</string>
3. <string name="btn_en">Английский</string>
4. <string name="btn_ru">Русский</string>
5. <string name="btn_de">Немецкий</string>
6. <string name="btn_fr">Французский</string>
7. </resources>

1. Source code values-hi/strings.xml (Hindi)
2. 
   
3. <resources>
4. <string name="hello_world">नमस्ते दुनिया</string>

   <string name="btn_en">अंग्रेज़ी</string>
   <string name="btn_ru">Russisch</string>
   <string name="btn_de">हिंदी</string>
   <string name="btn_fr">मराठी</string>

5. </resources>
7. Source code values-de/strings.xml (marathi)
8. <resources>
9. <string name="hello_world">हॅलो जग</string>

   <string name="btn_en">इंग्रजी</string>
   <string name="btn_ru">Russisch</string>
   <string name="btn_de">हिंदी</string>
   <string name="btn_fr">मराठी</string>

10. </resources>

step 2 :

Creat resource file with 4 button and 1 textview

1. <?xml version="1.0" encoding="utf-8"?>
2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
3. android:layout_width="match_parent"
4. android:layout_height="match_parent"
5. android:orientation="vertical" >
7. <TextView
8. android:id="@+id/txt_hello"
9. android:layout_width="match_parent"
10. android:layout_height="wrap_content"
11. android:layout_weight="1"
12. android:gravity="center"
13. android:text="@string/hello_world" />
15. <LinearLayout
16. android:layout_width="match_parent"
17. android:layout_height="wrap_content"
18. android:layout_weight="1"
19. android:orientation="horizontal"
20. android:gravity="center">
22. <Button
23. android:id="@+id/btn_en"
24. android:layout_width="wrap_content"
25. android:layout_height="wrap_content"
26. android:layout_weight="1"
27. android:text="@string/btn_en" />
29. <Button
30. android:id="@+id/btn_ru"
31. android:layout_width="wrap_content"
32. android:layout_height="wrap_content"
33. android:layout_weight="1"
34. android:text="@string/btn_ru" />
36. <Button
37. android:id="@+id/btn_de"
38. android:layout_width="wrap_content"
39. android:layout_height="wrap_content"
40. android:layout_weight="1"
41. android:text="@string/btn_de" />
43. <Button
44. android:id="@+id/btn_fr"
45. android:layout_width="wrap_content"
46. android:layout_height="wrap_content"
47. android:layout_weight="1"
48. android:text="@string/btn_fr" />
49. </LinearLayout>
51. </LinearLayout>

Step 3 -

main activity code

(MainActivity.java)

1. public class MainActivity extends AppCompatActivity implements View.OnClickListener{
3. private TextView txt_hello;
4. private Button btn_en, btn_ru, btn_fr, btn_de;
5. private Locale myLocale;
7. @Override
8. protected void onCreate(Bundle savedInstanceState) {
9. super.onCreate(savedInstanceState);
10. setContentView(R.layout.activity_main);
12. this.txt_hello = (TextView)findViewById(R.id.txt_hello);
13. this.btn_en = (Button) findViewById(R.id.btn_en);
14. this.btn_ru = (Button) findViewById(R.id.btn_ru);
15. this.btn_fr = (Button)findViewById(R.id.btn_fr);
16. this.btn_de = (Button)findViewById(R.id.btn_de);
18. this.btn_en.setOnClickListener(this);
19. this.btn_ru.setOnClickListener(this);
20. this.btn_fr.setOnClickListener(this);
21. this.btn_de.setOnClickListener(this);
23. loadLocale();
24. }
26. public void loadLocale()
27. {
28. String langPref = "Language";
29. SharedPreferences prefs = getSharedPreferences("CommonPrefs", Activity.MODE_PRIVATE);
30. String language = prefs.getString(langPref, "");
31. changeLang(language);
32. }
34. public void saveLocale(String lang)
35. {
36. String langPref = "Language";
37. SharedPreferences prefs = getSharedPreferences("CommonPrefs", Activity.MODE_PRIVATE);
38. SharedPreferences.Editor editor = prefs.edit();
39. editor.putString(langPref, lang);
40. editor.commit();
41. }
43. public void changeLang(String lang)
44. {
45. if (lang.equalsIgnoreCase(""))
46. return;
47. myLocale = new Locale(lang);
48. saveLocale(lang);
49. Locale.setDefault(myLocale);
50. android.content.res.Configuration config = new android.content.res.Configuration();
51. config.locale = myLocale;
52. getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
53. updateTexts();
54. }
56. private void updateTexts()
57. {
58. txt_hello.setText(R.string.hello_world);
59. btn_en.setText(R.string.btn_en);
60. btn_ru.setText(R.string.btn_ru);
61. btn_fr.setText(R.string.btn_fr);
62. btn_de.setText(R.string.btn_de);
63. }
65. @Override
66. public void onClick(View v) {
67. String lang = "en";
68. switch (v.getId()) {
69. case R.id.btn_en:
70. lang = "en";
71. break;
72. case R.id.btn_ru:
73. lang = "ru";
74. break;
75. case R.id.btn_de:
76. lang = "de";
77. break;
78. case R.id.btn_fr:
79. lang = "fr";
80. break;
81. default:
82. break;
83. }
84. changeLang(lang);
85. }
87. @Override
88. public void onConfigurationChanged(android.content.res.Configuration newConfig) {
89. super.onConfigurationChanged(newConfig);
90. if (myLocale != null){
91. newConfig.locale = myLocale;
92. Locale.setDefault(myLocale);
93. getBaseContext().getResources().updateConfiguration(newConfig, getBaseContext().getResources().getDisplayMetrics());
94. }
95. }
96. }

this is simple code for language change programaticaly. u can change multiple language .

- Mahesh Kailash Saraswat