for example if you want your application to support both English
and Arabic strings (in addition to the default strings),
you can simply create two additional
resource directories called /res/values-en
(for the English strings.xml) and
/res/values-ar
(for the Arabic strings.xml).
Within the strings.xml
files, the
resource names are the same.
For example, the /res/values-en/strings.xml
file could
look like this:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello in English!</string>
</resources>
Whereas, the /res/values-ar/strings.xml file would look like this:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">مرحبا في اللغة الإنجليزية</string>
</resources>
also , the /res/values-ur_IN/strings.xml file would look like this for urdu:
ur_IN for india ur_PK for pakisthan
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">انگریزی میں خوش!!</string>
</resources>
A default layout file in the /res/layout directory that displays the string refers to the
string by the variable name @string/hello, without regard to which language or directory
the string resource is in.
The Android operating system determines which version of
the string (French, English, or default) to load at runtime.A layout with a TextView control
to display the string might look like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:text="@string/hello" >
</LinearLayout>
The string is accessed programmatically in the normal way:
String str = getString(R.string.hello);
For change the language you need to like that change lang..
btn_english.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Locale locale = new Locale("en");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
Toast.makeText(this, getResources().getString(R.string.lbl_langSelectEnglis), Toast.LENGTH_SHORT).show();
}
});
btn_arbice.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Locale locale = new Locale("ar");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
Toast.makeText(this, getResources().getString(R.string.lbl_langSelecURdu), Toast.LENGTH_SHORT).show();
}
});
btn_urdu.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Locale locale = new Locale("ur_IN");
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config, getBaseContext().getResources().getDisplayMetrics());
Toast.makeText(HomeActivity.this, getResources().getString(R.string.lbl_langSelectEnglis), Toast.LENGTH_SHORT).show();
}
});
Also see this example for single screen
Custom fonts for TextView based on languages inside String
String paragraph = "hey what's up ضعيف";
int NO_FLAG = 0;
Bidi bidi = new Bidi(paragraph, NO_FLAG);
int runCount = bidi.getRunCount();
for (int i = 0; i < runCount; i++) {
String ltrtl = bidi.getRunLevel(i) % 2 == 0 ? "ltr" : "rtl";
String subString = paragraph.substring(bidi.getRunStart(i), bidi.getRunLimit(i));
Log.d(">>bidi:" + i, subString+" is "+ltrtl);
}
prints:
hey what's up is ltr
ضعيف is rtl
So now one can easily build TypefaceSpan
or MetricAffectingSpan
based on language direction like this:
SpannableString spanString = new SpannableString(paragraph);
for (int i = 0; i < runCount; i++) {
Object span = bidi.getRunLevel(i) % 2 == 0 ? ltrFontSpan : rtlFontSpan;
spanString.setSpan(span, bidi.getRunStart(i), bidi.getRunLimit(i), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
textView.setText(spanString);