我已经创建了一个文件,我想在该文件中写入字节,但是不起作用。问题出在哪里?
public void writeFileExternalStorage() {
File file = new File(getExternalFilesDir(null), "hhh.txt");
try {
if(!file.exists())
file.createNewFile();
FileOutputStream outputStream ;
outputStream = new FileOutputStream(file, true);
outputStream.write(files.getBytes());
outputStream.flush();
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}