android - Read Assets file as string

Question

I would like to read the content of a file located in the Assets as a String. For example, a text document located in src/main/assets/

Original Question
I found that this question is mostly used as a 'FAQ' for reading an assets file, therefore I summarized the question above. Below is my original question

I'm trying to read a assets file as string. I have a file in my assets folder: data.opml, and want to read it as a string.

Some things I tried:

 AssetFileDescriptor descriptor = getAssets().openFd("data.opml");
 FileReader reader = new FileReader(descriptor.getFileDescriptor());

And also:

 InputStream input = getAssets().open("data.opml");
 Reader reader = new InputStreamReader(input, "UTF-8");

But without success, so a full example would be appreciated.

Answer 1

getAssets().open() will return an InputStream. Read from that using standard Java I/O:

Java:

StringBuilder sb = new StringBuilder();
InputStream is = getAssets().open("book/contents.json");
BufferedReader br = new BufferedReader(new InputStreamReader(is, StandardCharsets.UTF_8 ));
String str;
while ((str = br.readLine()) != null) {
    sb.append(str);
}
br.close();

Kotlin:

val str = assets.open("book/contents.json").bufferedReader().use { it.readText() }