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.*; import android.widget.LinearLayout; import android.widget.TextView; import com.api.KException; import org.json.JSONException; import java.io.IOException; import java.util.ArrayList; public class LyricsDialog extends DialogFragment { private LinearLayout linearLoading; private TextView textView; public final static String keyLyricsId = "get_lyrics"; public final static String keyLyricsTitle = "lyr_Title"; private String title; private boolean isLoading; private boolean isFirstResume; private String lyrics; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { title = getArguments().getString(keyLyricsTitle); View view = inflater.inflate(R.layout.dialog_lyrics, container, false); getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE); linearLoading = (LinearLayout) view.findViewById(R.id.linearLoading); textView = (TextView) view.findViewById(R.id.textLyrics); if (savedInstanceState != null) { lyrics = savedInstanceState.getString("keyLyrics"); isFirstResume = lyrics == null; linearLoading.setVisibility(View.GONE); } else isFirstResume = true; isLoading = false; return view; } private AsyncTask<Void, Void, String> task; @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); if (lyrics != null) outState.putString("keyLyrics", lyrics); } private void getLyrics() { task = new AsyncTask<Void, Void, String>() { @Override protected void onPreExecute() { super.onPreExecute(); isLoading = true; linearLoading.setVisibility(View.VISIBLE); } @Override protected String doInBackground(Void... params) { if (!MainScreenActivity.isRegister) return "For getting lyrics is necessary to sign in (vk)"; try { if (title == null) return MainScreenActivity.api.getLyrics(getArguments().getLong(keyLyricsId)); else { ArrayList<Audio> audios = MainScreenActivity.api.searchAudio(title, 1); if (audios.size() == 1 && audios.get(0).getLyrics_id() != 0) return MainScreenActivity.api.getLyrics(audios.get(0).getLyrics_id()); else { return "Sorry , can't find lyrics"; } } } catch (IOException e) { e.printStackTrace(); return e.getMessage(); } catch (JSONException e) { e.printStackTrace(); return e.getMessage(); } catch (KException e) { e.printStackTrace(); ((AbstractReceiver) getActivity()).handleKException(e); return e.getMessage(); } } @Override protected void onPostExecute(String s) { super.onPostExecute(s); isLoading = false; linearLoading.setVisibility(View.GONE); lyrics = s; textView.setText(s); } }; task.execute(); } @Override public void onDestroyView() { super.onDestroyView(); if (isLoading && task != null) task.cancel(true); } @Override public void onResume() { super.onResume(); WindowManager.LayoutParams lp = new WindowManager.LayoutParams(); lp.copyFrom(getDialog().getWindow().getAttributes()); lp.width = WindowManager.LayoutParams.MATCH_PARENT; lp.height = WindowManager.LayoutParams.MATCH_PARENT; getDialog().getWindow().setAttributes(lp); if (isFirstResume) { getLyrics(); isFirstResume = false; } else { textView.setText(lyrics); } } }