Implementation

File Picker Dialog

1. Start by creating an instance of DialogProperties.

       DialogProperties properties=new DialogProperties();

   Now 'DialogProperties' has certain parameters.

Parameter	Type	Function
selection_mode	int	Selection Mode defines whether a single of multiple Files/Directories have to be selected.
selection_type	int	Selection Type defines whether a File/Directory or both of these has to be selected.
root	File	The Parent/Root Directory. List of Files are populated from here. Can be set to any readable directory.
extensions	String[]	An Array of String containing extensions, Files with only that will be shown. Others will be ignored.

2. Assign values to each Dialog Property using DialogConfig class.

       properties.selection_mode=DialogConfigs.SINGLE_MODE;
       properties.selection_type=DialogConfigs.FILE_SELECT;
       properties.root=new File(DialogConfigs.DEFAULT_DIR);
       properties.extensions=null;

   Read more about DialogConfigs and other options from here.

3. Next create an instance of FilePickerDialog, and pass Context and DialogProperties references as parameters.

       FilePickerDialog dialog = new FilePickerDialog(MainActivity.this,properties);

4. Next, Attach DialogSelectionListener to FilePickerDialog as below,

       dialog.setDialogSelectionListener(new DialogSelectionListener() {
           @Override
           public void onSelectedFilePaths(String[] files) {
               //files is the array of the paths of files selected by the Application User.
           }
       });

   An array of paths is returned whenever user press the select button`.

5. Use dialog.show() method to show dialog.

   That's It. You are good to move further.

File Picker Preference