Java tutorial
package com.perm.DoomPlay; /* * Copyright 2013 Vladislav Krot * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * * You can contact me <DoomPlaye@gmail.com> */ import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.Window; import android.widget.*; import com.api.Account; import com.api.KException; import org.json.JSONException; import java.io.IOException; public class AddTrackToAlbumDialog extends DialogFragment { private ListView listView; private LinearLayout linearLoading; private static boolean isLoading = false; public final static String keyDialogAlbum = "keybndleed"; private long trackId; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { trackId = getArguments().getLong(keyDialogAlbum); getDialog().requestWindowFeature(Window.FEATURE_NO_TITLE); View view = inflater.inflate(R.layout.list_vk, container, false); linearLoading = (LinearLayout) view.findViewById(R.id.linearLoading); listView = (ListView) view.findViewById(R.id.listVk); listView.setOnItemClickListener(onItemClickHandler); return view; } @Override public void onResume() { super.onResume(); if (VkAlbumsActivity.albums == null && !isLoading) { new AsyncTask<Void, Void, Void>() { @Override protected void onPreExecute() { super.onPreExecute(); linearLoading.setVisibility(View.VISIBLE); isLoading = true; } @Override protected Void doInBackground(Void... params) { try { VkAlbumsActivity.albums = MainScreenActivity.api.getAudioAlbums(Account.account.user_id, null, SettingActivity.getPreference("countvkall")); } catch (IOException e) { isLoading = false; ((AbstractReceiver) getActivity()).showException(e); cancel(false); } catch (JSONException e) { isLoading = false; ((AbstractReceiver) getActivity()).showException(e); cancel(false); } catch (KException e) { isLoading = false; ((AbstractReceiver) getActivity()).handleKException(e); cancel(false); } return null; } @Override protected void onPostExecute(Void aVoid) { super.onPostExecute(aVoid); listView.setAdapter(new DialogAddAdapter()); linearLoading.setVisibility(View.GONE); isLoading = false; } }.execute(); } else if (!isLoading) { listView.setAdapter(new DialogAddAdapter()); } } private final AdapterView.OnItemClickListener onItemClickHandler = new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { new AsyncTask<Long, Void, Void>() { @Override protected Void doInBackground(Long... params) { try { MainScreenActivity.api.moveToAudioAlbum(params[0], trackId); } catch (IOException e) { isLoading = false; ((AbstractReceiver) getActivity()).showException(e); cancel(false); } catch (JSONException e) { isLoading = false; ((AbstractReceiver) getActivity()).showException(e); cancel(false); } catch (KException e) { isLoading = false; ((AbstractReceiver) getActivity()).handleKException(e); cancel(false); } return null; } }.execute(VkAlbumsActivity.albums.get(position).album_id); dismiss(); Toast.makeText(getActivity(), getResources().getString(R.string.tracks_added), Toast.LENGTH_SHORT) .show(); } }; class DialogAddAdapter extends BaseAdapter { final LayoutInflater inflater; public DialogAddAdapter() { inflater = getActivity().getLayoutInflater(); } @Override public int getCount() { return VkAlbumsActivity.albums.size(); } @Override public Object getItem(int position) { return VkAlbumsActivity.albums.get(position); } @Override public long getItemId(int position) { return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { View view = inflater.inflate(R.layout.item_vk_album, parent, false); TextView textView = (TextView) view.findViewById(R.id.textGenre); textView.setText(VkAlbumsActivity.albums.get(position).title); return view; } } }