Run bulk export in AsyncTask

app/src/main/java/com/kabouzeid/gramophone/ui/fragments/mainactivity/library/LibraryFragment.java

@@ -1,9 +1,12 @@
 package com.kabouzeid.gramophone.ui.fragments.mainactivity.library;
 
 
+import android.annotation.SuppressLint;
 import android.app.Activity;
+import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.os.AsyncTask;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
@@ -19,6 +22,7 @@ import android.view.MenuItem;
 import android.view.SubMenu;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.Toast;
 
 import com.afollestad.materialcab.MaterialCab;
 import com.kabouzeid.appthemehelper.ThemeStore;
@@ -41,6 +45,7 @@ import com.kabouzeid.gramophone.ui.fragments.mainactivity.library.pager.ArtistsF
 import com.kabouzeid.gramophone.ui.fragments.mainactivity.library.pager.PlaylistsFragment;
 import com.kabouzeid.gramophone.ui.fragments.mainactivity.library.pager.SongsFragment;
 import com.kabouzeid.gramophone.util.PhonographColorUtil;
+import com.kabouzeid.gramophone.util.PlaylistsUtil;
 import com.kabouzeid.gramophone.util.PreferenceUtil;
 import com.kabouzeid.gramophone.util.Util;
 
@@ -250,7 +255,29 @@ public class LibraryFragment extends AbsMainActivityFragment implements CabHolde
                 CreatePlaylistDialog.create().show(getChildFragmentManager(), "CREATE_PLAYLIST");
                 return true;
             case R.id.action_export_playlists:
-                // TODO
+                @SuppressLint("ShowToast")
+                final Toast toast = Toast.makeText(getActivity(), R.string.saving_playlists, Toast.LENGTH_LONG);
+                new AsyncTask<Context, Void, String>() {
+                    @Override
+                    protected void onPreExecute() {
+                        super.onPreExecute();
+                        toast.show();
+                    }
+
+                    @Override
+                    protected String doInBackground(Context... params) {
+                        return PlaylistsUtil.saveAllPlaylists(params[0]);
+                    }
+
+                    @Override
+                    protected void onPostExecute(String string) {
+                        super.onPostExecute(string);
+                        if (toast != null) {
+                            toast.setText(string);
+                            toast.show();
+                        }
+                    }
+                }.execute(getActivity().getApplicationContext());
                 return true;
             case R.id.action_search:
                 startActivity(new Intent(getActivity(), SearchActivity.class));

app/src/main/res/values/strings.xml

@@ -234,6 +234,7 @@
     <string name="folders">Folders</string>
     <string name="saved_playlist_to">Saved playlist to %s.</string>
     <string name="failed_to_save_playlist">Failed to save playlist (%s).</string>
+    <string name="saving_playlists">Saving playlists…</string>
     <string name="saved_x_playlists_to_x">Saved %1$d playlists to %2$s.</string>
     <string name="saved_x_playlists_to_x_failed_to_save_x">Saved %1$d playlists to %2$s, failed to save %3$d.</string>
     <string name="not_listed_in_media_store"><![CDATA[<b>%s</b> is not listed in the media store.]]></string>