Android Studio:Unmappable Character for Encoding Utf-8

Android Studio : unmappable character for encoding UTF-8

I had the same problem because there was files with windows-1251 encoding and Cyrillic comments. In Android Studio which is based on IntelliJ IDEA you can solve it in two ways:

a) convert file encoding to UTF-8 or

b) set the right file encoding in your build.gradle script:

android {
    ...
    compileOptions.encoding = 'windows-1251' // write your encoding here
    ...

To convert file encoding use the menu at the bottom right corner of IDE. Select right file encoding first -> press Reload -> select UTF-8 -> press Convert.

Also read this Use the UTF-8, Luke! File Encodings in IntelliJ IDEA

Android Studio - Unmappable character for encoding UTF-8

Adding the following to build.gradle solves the problem :

android {
    ...
    compileOptions.encoding = 'ISO-8859-1'

How to fix Unmappable character for encoding windows-1252 error displayed by Gradle build?

You probably have a config for encoding in the android compileOptions in your build.gradle

Look for encoding = 'Cp1252' and remove it.

android
{
    compileOptions {
        encoding = 'Cp1252'
    }
}

Android studio gradle build compile error

Looks like a problem related to BOM (Byte Order Mark)

Method 1

Use an advanced text-editor (for example Notepad++) and set the encoding to "UTF without BOM", for your files.
You can find this option in Notepad++ under Enconding > Encode in UTF-8 without BOM

Method 2

Use Android Studio. Changed file Encoding option to UTF-16 and back to UTF-8. Then there should a popup appear, choose the option Convert.

Thai script seems to lose UTF-8 encoding in java for-each loop

As several in the comments pointed out the problem had to be within my environment. After a bit more searching I found I should have rebuilt the project after changing the encodings (so merely switching to UTF8 and clicking 'Apply'/'OK' wasn't enough). I should note here that my File Encoding settings look like this, for reference:

Once I rebuilt, I started getting the compiler error "unmappable character for encoding cp1252" on the String array containing the Thai (side note: Some of the Thai characters were fine, others rendered as � and friends. I would have thought either all of the Thai would work or none of it, but was surprised to see even common Thai letters such as ก cause the compiler to choke).

That error led to this post in which I tried a few things to set the compiler options to UTF8. Since my application happens to be a sort of 'pre-process' for an android app, and is therefore separate from the app itself (if that makes any sense), I didn't have the luxury of using the compilerOptions attribute as the answers in the aforementioned SO post recommended (though I have since added it to the gradle on the android app side). This led me to setting the environment variable JAVA_TOOLS_OPTIONS via powershell:

setx JAVA_TOOLS_OPTIONS "-Dfile.encoding=UTF8"

Which fixed the issue!

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