Java tutorial
/* This file is part of the Diaspora for Android. Diaspora for Android is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. Diaspora for Android is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the Diaspora for Android. If not, see <http://www.gnu.org/licenses/>. */ package com.github.dfa.diaspora_android.activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Build; import android.os.Bundle; import android.support.design.widget.Snackbar; import android.support.v4.content.LocalBroadcastManager; import android.support.v4.view.MenuItemCompat; import android.support.v7.widget.SearchView; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.webkit.CookieManager; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.TextView; import com.github.dfa.diaspora_android.App; import com.github.dfa.diaspora_android.R; import com.github.dfa.diaspora_android.data.DiasporaPodList; import com.github.dfa.diaspora_android.data.DiasporaPodList.DiasporaPod; import com.github.dfa.diaspora_android.service.FetchPodsService; import com.github.dfa.diaspora_android.ui.PodSelectionDialog; import com.github.dfa.diaspora_android.ui.theme.ThemedFragment; import com.github.dfa.diaspora_android.util.AppLog; import com.github.dfa.diaspora_android.util.AppSettings; import com.github.dfa.diaspora_android.util.DiasporaUrlHelper; import com.github.dfa.diaspora_android.util.Helpers; import org.json.JSONException; import org.json.JSONObject; import java.util.ArrayList; import butterknife.BindView; import butterknife.ButterKnife; import butterknife.OnClick; /** * Fragment that lets the user choose a Pod * Created by vanitas on 01.10.16. */ public class PodSelectionFragment extends ThemedFragment implements SearchView.OnQueryTextListener, PodSelectionDialog.PodSelectionDialogResultListener { public static final String TAG = "com.github.dfa.diaspora_android.PodSelectionFragment"; @BindView(R.id.podselection__fragment__listpods) protected ListView listViewPod; protected App app; protected AppSettings appSettings; private DiasporaPodList podList; private ArrayAdapter<String> listViewPodAdapter; private String filterString = ""; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { AppLog.d(this, "onCreateView()"); View view = inflater.inflate(R.layout.podselection__fragment, container, false); ButterKnife.bind(this, view); return view; } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); app = (App) getActivity().getApplication(); appSettings = app.getSettings(); // Load local podlist podList = new DiasporaPodList(); mergePodlistWithRessources(podList); podList.setTrackMergeChanges(true); updateListedPods(); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { listViewPod.setNestedScrollingEnabled(true); } listViewPod.setTextFilterEnabled(true); listViewPod.setOnItemClickListener(new AdapterView.OnItemClickListener() { public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { String text = ((TextView) view).getText().toString(); for (DiasporaPod pod : podList) { if (pod.getPodUrl().getHost().equals(text)) { showPodSelectionDialog(pod); return; } } } }); LocalBroadcastManager.getInstance(getContext()).registerReceiver(podListReceiver, new IntentFilter(FetchPodsService.MESSAGE_PODS_RECEIVED)); Helpers.showInfoIfUserNotConnectedToInternet(getContext(), listViewPod); } public void mergePodlistWithRessources(DiasporaPodList podlist) { String sPodlist = Helpers.readTextfileFromRawRessource(getContext(), R.raw.podlist, "", ""); try { JSONObject jPodlist = new JSONObject(sPodlist); podlist.mergeWithNewerEntries(new DiasporaPodList().fromJson(jPodlist)); } catch (JSONException e) { e.printStackTrace(); } } @OnClick(R.id.podselection__fragment__button_use_custom_pod) public void onPodButtonClicked(View v) { showPodSelectionDialog(new DiasporaPod()); } @Override public String getFragmentTag() { return TAG; } private final BroadcastReceiver podListReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (intent.hasExtra(FetchPodsService.EXTRA_PODLIST)) { Bundle extras = intent.getExtras(); DiasporaPodList newPods = (DiasporaPodList) extras.get(FetchPodsService.EXTRA_PODLIST); if (newPods != null && newPods.getPods().size() > 0) { try { podList.mergeWithNewerEntries(newPods); updateListedPods(); } catch (JSONException ignored) { } } else { Snackbar.make(listViewPod, R.string.podlist_error, Snackbar.LENGTH_SHORT).show(); } } } }; @Override protected void applyColorToViews() { /* Not really anything to do. Maybe later */ } @Override public void onResume() { super.onResume(); Intent i = new Intent(getContext(), FetchPodsService.class); getContext().startService(i); } private void updateListedPods() { final ArrayList<String> listedPodsList = new ArrayList<>(); for (DiasporaPod pod : this.podList) { listedPodsList.add(pod.getPodUrl().getHost()); } listViewPodAdapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_list_item_1, listedPodsList); // save index and top position int index = listViewPod.getFirstVisiblePosition(); View v = listViewPod.getChildAt(0); int top = (v == null) ? 0 : (v.getTop() - listViewPod.getPaddingTop()); listViewPod.setAdapter(listViewPodAdapter); listViewPod.setSelectionFromTop(index, top); listViewPodAdapter.getFilter().filter(filterString); } private void showPodSelectionDialog(final DiasporaPod selectedPod) { PodSelectionDialog dialog = PodSelectionDialog.newInstance(selectedPod, this); dialog.show(getFragmentManager(), PodSelectionDialog.TAG); } @Override public void onDestroy() { LocalBroadcastManager.getInstance(getContext()).unregisterReceiver(podListReceiver); super.onDestroy(); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.podselection__menu, menu); MenuItem searchItem = menu.findItem(R.id.podselection__action_search); if (searchItem != null) { SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem); searchView.setOnQueryTextListener(this); } super.onCreateOptionsMenu(menu, inflater); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.action_reload: { if (!Helpers.showInfoIfUserNotConnectedToInternet(getContext(), listViewPod)) { Intent i = new Intent(getContext(), FetchPodsService.class); getContext().startService(i); return true; } } } return super.onOptionsItemSelected(item); } @Override public boolean onQueryTextChange(String newText) { if (listViewPodAdapter != null) { (listViewPodAdapter).getFilter().filter(newText); } return true; } @Override public void onPodSelectionDialogResult(DiasporaPod pod, boolean accepted) { System.out.println(accepted + ": " + pod.toString()); if (accepted) { app.getSettings().setPod(pod); try { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { CookieManager.getInstance().removeAllCookies(null); CookieManager.getInstance().removeSessionCookies(null); } else { //noinspection deprecation CookieManager.getInstance().removeAllCookie(); //noinspection deprecation CookieManager.getInstance().removeSessionCookie(); } } catch (Exception e) { e.printStackTrace(); } MainActivity mainActivity = (MainActivity) getActivity(); DiasporaUrlHelper urlHelper = new DiasporaUrlHelper(appSettings); mainActivity.onPodSelectionDialogResult(pod, accepted); mainActivity.openDiasporaUrl(urlHelper.getSignInUrl()); } } /* * Dummy implementations */ @Override public void onCreateBottomOptionsMenu(Menu menu, MenuInflater inflater) { } @Override public boolean onQueryTextSubmit(String query) { return false; } @Override public boolean onBackPressed() { return false; } @Override public boolean isAllowedIntellihide() { return false; } }