File Picker in PreferenceFragment einbinden

<com.github.angads25.filepicker.view.FilePickerPreference
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:key="pref_videoPath_key"
        android:title="@string/pref_description_moviesPath_title"
        android:summary="@string/pref_description_moviesPath_title"
        android:defaultValue="/sdcard:/mnt"
        app:offset_dir="/mnt/sdcard/android"
        app:error_dir="/mnt"
        app:root_dir="/sdcard"
        app:selection_mode="multi_mode"
        app:selection_type="dir_select"
        app:extensions="txt:pdf:"/>

package com.rwenzel.DashCAM;


import android.annotation.TargetApi;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Build;
import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.app.ActionBar;
import android.preference.PreferenceFragment;
import android.view.MenuItem;


import java.util.List;


/**
 * A {@link PreferenceActivity} that presents a set of application settings. On
 * handset devices, settings are presented as a single list. On tablets,
 * settings are split by category, with category headers shown to the left of
 * the list of settings.
 * <p>
 * See <a href="http://developer.android.com/design/patterns/settings.html">
 * Android Design: Settings</a> for design guidelines and the <a
 * href="http://developer.android.com/guide/topics/ui/settings.html">Settings
 * API Guide</a> for more information on developing a Settings UI.
 */
public class SettingsActivity extends PreferenceActivity {


    /**
     * Helper method to determine if the device has an extra-large screen. For
     * example, 10" tablets are extra-large.
     */
    private static boolean isXLargeTablet(Context context) {
        return (context.getResources().getConfiguration().screenLayout
                & Configuration.SCREENLAYOUT_SIZE_MASK) >= Configuration.SCREENLAYOUT_SIZE_XLARGE;
    }


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setupActionBar();
    }


    /**
     * Set up the {@link android.app.ActionBar}, if the API is available.
     */
    private void setupActionBar() {
        ActionBar actionBar = getActionBar();
        if (actionBar != null) {
            // Show the Up button in the action bar.
            actionBar.setDisplayHomeAsUpEnabled(true);
        }
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == android.R.id.home) {
            SettingsActivity.this.finish();
            return true;
        }
        return super.onOptionsItemSelected(item);
    }


    /**
     * {@inheritDoc}
     */
    @Override
    public boolean onIsMultiPane() {
        return isXLargeTablet(this);
    }


    /**
     * {@inheritDoc}
     */
    @Override
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public void onBuildHeaders(List<Header> target) {
        loadHeadersFromResource(R.xml.pref_headers, target);
    }


    /**
     * This method stops fragment injection in malicious applications.
     * Make sure to deny any unknown fragments here.
     */
    protected boolean isValidFragment(String fragmentName) {
        return PreferenceFragment.class.getName().equals(fragmentName)
                || GeneralPreferenceFragment.class.getName().equals(fragmentName)
                || DataSyncPreferenceFragment.class.getName().equals(fragmentName);
    }


    /**
     * This fragment shows general preferences only. It is used when the
     * activity is showing a two-pane settings UI.
     */
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class GeneralPreferenceFragment extends PreferenceFragment {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_general);
            setHasOptionsMenu(true);
        }


        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            int id = item.getItemId();
            if (id == android.R.id.home) {
                startActivity(new Intent(getActivity(), SettingsActivity.class));
                return true;
            }


            return super.onOptionsItemSelected(item);
        }
    }


    /**
     * This fragment shows data and sync preferences only. It is used when the
     * activity is showing a two-pane settings UI.
     */
    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    public static class DataSyncPreferenceFragment extends PreferenceFragment {


        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            addPreferencesFromResource(R.xml.pref_data_sync);
            setHasOptionsMenu(true);
        }


        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            int id = item.getItemId();
            if (id == android.R.id.home) {
                startActivity(new Intent(getActivity(), SettingsActivity.class));
                return true;
            }
            return super.onOptionsItemSelected(item);
        }
    }
}

@Override
        public boolean onPreferenceChange(Preference preference, Object o) {
        String sPath="";


            SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getActivity());
            SharedPreferences.Editor editor = preference.getEditor();
            if(preference.getKey().equals("pref_videoPath_key")){
                String value=(String)o;
                String arr[]=value.split(":");


                for(String path:arr){
                    sPath=path;
                }
                editor.putString("pref_videoPath_key",sPath);
                Toast.makeText(getActivity(),sPath,Toast.LENGTH_SHORT).show();
                Preference mVideoPathPref = (Preference) getPreferenceScreen().findPreference("showrecordVideoPath_key");
                mVideoPathPref.setSummary(sPath);
            }


            editor.commit();


            return false;
        }