IllegalArgumentException: File contains a path separator Android
android, exception, file, illegalargumentexception, java
Solution
The openFileInput method will not accept path separators.('/')
it accepts only the name of the file which you want to open/access. so change the statement
outputStream = openFileOutput(patternDirectory.getAbsolutePath().toString(), Context.MODE_APPEND);
to
outputStream = new FileOutputStream (new File(patternDirectory.getAbsolutePath().toString()), true); // true will be same as Context.MODE_APPEND
Problem
I'm trying to write to an output file on my HTC One and get the following message in the LogCat: 11-21 08:05:18.228: W/System.err(6609): java.lang.IllegalArgumentException: File /storage/emulated/0/com.example.pattern1/myfile.txt contains a path separator The source code is given below: ``` protected void writeToFile(String string){ File patternDirectory = new File(Environment.getExternalStorageDirectory().getAbsolutePath().toString()+"/com.example.pattern1/myfile.txt"); patternDirectory.mkdirs(); FileOutputStream outputStream; try { outputStream = openFileOutput(patternDirectory.getAbsolutePath().toString(), Context.MODE_APPEND); outputStream.write(string.getBytes()); TextView t = (TextView)findViewById(R.id.bottomMidText); t.setText(patternDirectory.getAbsolutePath().toString()); outputStream.close(); } catch (Exception e) { e.printStackTrace(); } ``` I would appreciate if someone can help identify the problem.