How to create text file and insert data to that file on Android

Question

How can I create file.txt and insert data on file with content of some of variable on my code for example : population [][]; on Android, so there will be folder files on our package in file explorer (data/data/ourpackage/files/ourfiles.txt) Thank You

Answer 1

Using this code you can write to a text file in the SDCard. Along with it, you need to set a permission in the Android Manifest.

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /> 

This is the code :

public void generateNoteOnSD(Context context, String sFileName, String sBody) {     try {         File root = new File(Environment.getExternalStorageDirectory(), "Notes");         if (!root.exists()) {             root.mkdirs();         }         File gpxfile = new File(root, sFileName);         FileWriter writer = new FileWriter(gpxfile);         writer.append(sBody);         writer.flush();         writer.close();         Toast.makeText(context, "Saved", Toast.LENGTH_SHORT).show();     } catch (IOException e) {         e.printStackTrace();     } } 

Before writing files you must also check whether your SDCard is mounted & the external storage state is writable.

Environment.getExternalStorageState() 

Answer 2

Check the android documentation. It's in fact not much different than standard java io file handling so you could also check that documentation.

An example from the android documentation:

String FILENAME = "hello_file"; String string = "hello world!";  FileOutputStream fos = openFileOutput(FILENAME, Context.MODE_PRIVATE); fos.write(string.getBytes()); fos.close();