Develop Reference

Retrofit 2.1 Posting Cyrillic Field Error

I am using Retrofit 2.1. But when I post a field that contains cyrillic word, it gives an empty response, however it should return 2-3 items. Here is the api:
#FormUrlEncoded
#POST("my_awesome_base_url")
Call<Questions> getQuestions(#Field(value = "rowsdata", encoded = false) String rowsdata);
And the rowsdata contains some cyrillic word that db should search and respond similar results. Here is an example rowsdata:
rowsdata = {"code":"-4","start":"1","where":"where short_question like 'Вақт' ","end":"2"}
In the rowsdata, Вақт is in cyrillic, but it is somehow encoding it to some chars so that server is giving me an empty list.
I checked this on Postman, and it gave me the desired results, but when I send a request using Retrofit, it is responding like nothing is found...

Probably an encoding issue.
From developers site :
A String represents a string in the UTF-16 format in which
supplementary characters are represented by surrogate pairs (see the
section Unicode Character Representations in the Character class for
more information). Index values refer to char code units, so a
supplementary character uses two positions in a String.
Try encoding the string into UTF-8, make sure your file is UTF-8 as well (default in Android Studio I think).

How can I put utf-16 characters in Android string resource?

I want to use Emojis in my app's strings. All strings reside, of course, in strings.xml
The problem is that not all Emojis are 16 bit friendly. Some Emojis can be represented as "normal" 16 bit hex: '\u26FF' but some are 32 bit hexes (UTF-16), usually represented as: '\x1F600'. I have no problem dealing with those inside the app, in code. But the strings.xml resource file is UTF8 encoded, and does not deal properly with non 16 bit escape chars.
I tried using '\x1F600' - because I saw that '\u26FF' works just fine. But it seems not to devour the 'x' escape char. Nor did it like the regexp notation '\x{1F600}'
So I ended up using a string placeholder '%1$s' and filling in the Emoji in code like this:
// greeting_3 is defined as: "hello there %1$s!"
String s = context.getString(R.string.greeting_3, "😜");
// OR:
String s = context.getString(R.string.greeting_3, new String(Character.toChars(0x1F61C)));
This is not a very elegant solution... is there a proper way to put 32 bit UTF-8 chars in strings.xml ?

But the strings.xml resource file is UTF8
If it's UTF-8 encoded, you can put your emojis directly. But then you risk that your editor or another piece of software destroys them.
If you are putting them in XML, you can try using XML entities: 😀, I'm not sure how well Android supports them though.
You can also use surrogate pairs: convert the emoji to UTF-16 and use standard \u escape. You can for example check out this page, it even tells you how to create a string litaral in Java: http://www.fileformat.info/info/unicode/char/1F600/index.htm
😜 → U+1F600 → "\uD83D\uDE00"

The easiest way it just copying and pasting the emoji, it works from Android Studio 3.0 and newer

Add the resource like follows:
<string name="string_title">This is a emoji example <U+1F642></string>
In Android Studio 3.0 you can copy and paste an emoji:
And here how it looks:

Setting Danish Character Text

I am getting some strings from json. My string contains special characters like "æ" from Næstved an many more like "ø" from køkken. But When I set Text these strings to ant textview, I get my strings printed in unusual way.
Example: For køkken I get k&oslash ;kken.
I think I need to encode or decode my string somewhere but where I don,t know.
Please help.
Thanks in advance

The displayed version of your string represents an HTML encoded entity. You might want to verify that it is not coming in this way in your JSON data, but in any case, to decode it you can use the StringEscapeUtils.unescapeHtml4 method from Apache Commons Lang:
final String escaped = "køkken";
System.out.println(StringEscapeUtils.unescapeHtml4(escaped));
Output:
køkken

Did you check out the Latin Coding for your characters? I know the Ash character can be coded with æ and will show up æ in the browser.
Here is the a list of codes
Hope this helps!

How to put Hebrew character in Android JAVA file?

For Android Platform:
I need to put Hebrew Character ₪ and some more like אורנג in string to check with the incoming data in java file. When I put this character It shows an error like "Some characters can not be mapped using "Cp1252" character encoding. Either change the encoding or remove the characters which are not supported by the "Cp1252" character encoding". These values are coming from SQLite database. Please see the attached snap. How can I solve this? Kindly give me some useful suggestions. Looking forward to hear from anybody who has a suggestion for me. Thanks.

Please open your eclipse.ini file from your eclipse folder with Note Pad and put the following permission into that.
-Dfile.encoding = UTF-8
Some more options as well:
For setting the encoding on a per WorkSpace basis, use Preferences->General->Workspace
To set the encoding on a per project basis open project properties and change to UTF-8
Hope this one help.

I think you'll need UTF-8 encoding for that.
These things are a little bit confusing. Reading this might clear some of the mist around encodings and character sets.

I think this may useful to you.
Keep this hebrew word in string.xml file. You can retrieve as
in String.xml
place hebrew word here
In java code:
String s=getString(R.string.hebrew_word);
Use this string as you want..

Problem with special characters

How can I change the font on android to allow to show special characters like "'" or "à"?
Actually the strings that contains these characters are stored in the sqlite database.

When you load the text into your TextView, will this work for you?
textView.setText(new String(textFromDatabase, "UTF-8"));
This uses the String constructor to set the charset name. You can change "UTF-8" to a different Character encoding -- Also, look at the javadoc for String.
String(byte[] bytes, String charsetName) -
Constructs a new String by decoding the specified array of bytes using the specified charset.

The Droid font supports the "'", "à" and many others characters. I use them all the time (pt language).
Actually, I'm quite sure they support all the Basic Latin, Latin 1 supplement and the first extended latin range. They also support many others like hebrew etc., although I'm not sure if that changed between SDK versions.
You can also download the Unicode Map app in the Market to check which characters are available in your particular device. I also store unicode text in sqlite all the time, and still I don't have any problems.
One thing to consider: check that the encoding you are setting match the encoding of your source. It may be a text or a URL... an example:
BufferedReader b = new BufferedReader(new InputStreamReader(url.openStream(), MY_ENCODING));
Are you sure it's not a problem somewhere?

You should use '' instead of ' to store it into Sqlite database.
For example if you want to store 5 o'clock into database then you have to write this as 5 O''clock. Take a look here, for more information about it.

By default Android SQLite uses UTF-8.
I had this problem because when I populated the database on the first launch I used a txt file with another charset.