Android: write string to a file

FileOutputStream os = new FileOutputStream(fileName);

OutputStreamWriter osw = new OutputStreamWriter(os); 

osw.write(str);

osw.flush();

osw.close();

Do not use

DataOutputStream os = new DataOutputStream(new FileOutputStream(file));

os.writeUTF(str); // this will write a weird char at the beginning of the file

os.writeUTF writes the string with a modified UTF-8 encoding. If the file is opened by WebView as HTML, a weird char shows up at the beginning of the file.