Android File (Save in Application)
In Android, Application can save file under somewhere.
Maybe after saving, we can use it as setting file or contents.
Application can save….
- Application
- Storage(Internal, External)
etc…
Let’s explain.
In Application
Application specific directory is under /data/data/<application_package>/files
application_package is application package FQDN.
In real machine, we can’t see /data/data in application directory, though can see in Emulator.
If you want to test in application directory, we have no choice to use device.
I recommend we save settings files or something in this area.
Sample
private void write() { BufferedWriter bw = null; try { FileOutputStream os = openFileOutput("data.txt", MODE_PRIVATE); // Open file under application dir bw = new BufferedWriter(new OutputStreamWriter(os)); bw.write("Hello Japan!"); } catch ( Exception oops ) { oops.printStackTrace(); } finally { if ( bw != null ) { try { bw.close(); } catch ( IOException oops ) { oops.printStackTrace(); } } } } private void read() { BufferedReader br = null; try { FileInputStream is = openFileInput("data.txt"); br = new BufferedReader(new InputStreamReader(is)); String line; while( (line = br.readLine()) != null) { Log.i(TAG, line); } } catch ( Exception oops ) { oops.printStackTrace(); } finally { if ( br != null ) { try { br.close(); } catch ( IOException oops ) { oops.printStackTrace(); } } } }
To read and write in here, Android prepared Stream by Context, also can use File object(java.utils.File)
Next is storage,… Please go to next