Java tutorial
/* * Copyright 2014 Albert Vaca Cintora <albertvaka@gmail.com> * * This program 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 2 of * the License or (at your option) version 3 or any later version * accepted by the membership of KDE e.V. (or its successor approved * by the membership of KDE e.V.), which shall act as a proxy * defined in Section 14 of version 3 of the license. * * This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */ package org.kde.kdeconnect.UserInterface; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.util.Log; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.ListView; import android.widget.TextView; import org.kde.kdeconnect.BackgroundService; import org.kde.kdeconnect.Device; import org.kde.kdeconnect.Helpers.NetworkHelper; import org.kde.kdeconnect.Helpers.SecurityHelpers.SslHelper; import org.kde.kdeconnect.Plugins.Plugin; import org.kde.kdeconnect.UserInterface.List.CustomItem; import org.kde.kdeconnect.UserInterface.List.ListAdapter; import org.kde.kdeconnect.UserInterface.List.PluginItem; import org.kde.kdeconnect.UserInterface.List.SmallEntryItem; import org.kde.kdeconnect_tp.R; import java.util.ArrayList; import java.util.Collection; import java.util.ConcurrentModificationException; import java.util.Map; import java.util.concurrent.ConcurrentHashMap; /** * Main view. Displays the current device and its plugins */ public class DeviceFragment extends Fragment { static final String ARG_DEVICE_ID = "deviceId"; View rootView; static String mDeviceId; //Static because if we get here by using the back button in the action bar, the extra deviceId will not be set. Device device; TextView errorHeader; MaterialActivity mActivity; public DeviceFragment() { } public DeviceFragment(String deviceId) { Bundle args = new Bundle(); args.putString(ARG_DEVICE_ID, deviceId); this.setArguments(args); } public DeviceFragment(String deviceId, boolean fromDeviceList) { Bundle args = new Bundle(); args.putString(ARG_DEVICE_ID, deviceId); args.putBoolean("fromDeviceList", fromDeviceList); this.setArguments(args); } public DeviceFragment(String deviceId, MaterialActivity activity) { this.mActivity = activity; Bundle args = new Bundle(); args.putString(ARG_DEVICE_ID, deviceId); this.setArguments(args); } @Override public void onAttach(Activity activity) { super.onAttach(activity); mActivity = ((MaterialActivity) getActivity()); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { rootView = inflater.inflate(R.layout.activity_device, container, false); final String deviceId = getArguments().getString(ARG_DEVICE_ID); if (deviceId != null) { mDeviceId = deviceId; } setHasOptionsMenu(true); //Log.e("DeviceFragment", "device: " + deviceId); BackgroundService.RunCommand(mActivity, new BackgroundService.InstanceCallback() { @Override public void onServiceStart(BackgroundService service) { device = service.getDevice(mDeviceId); if (device == null) { Log.e("DeviceFragment", "Trying to display a device fragment but the device is not present"); mActivity.onDeviceSelected(null); return; } mActivity.getSupportActionBar().setTitle(device.getName()); device.addPairingCallback(pairingCallback); device.addPluginsChangedListener(pluginsChangedListener); refreshUI(); } }); final Button pairButton = (Button) rootView.findViewById(R.id.pair_button); pairButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { pairButton.setVisibility(View.GONE); ((TextView) rootView.findViewById(R.id.pair_message)).setText(""); rootView.findViewById(R.id.pair_progress).setVisibility(View.VISIBLE); BackgroundService.RunCommand(mActivity, new BackgroundService.InstanceCallback() { @Override public void onServiceStart(BackgroundService service) { device = service.getDevice(deviceId); if (device == null) return; device.requestPairing(); } }); } }); rootView.findViewById(R.id.accept_button).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { BackgroundService.RunCommand(mActivity, new BackgroundService.InstanceCallback() { @Override public void onServiceStart(BackgroundService service) { if (device != null) { device.acceptPairing(); rootView.findViewById(R.id.pairing_buttons).setVisibility(View.GONE); } } }); } }); rootView.findViewById(R.id.reject_button).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { BackgroundService.RunCommand(mActivity, new BackgroundService.InstanceCallback() { @Override public void onServiceStart(BackgroundService service) { if (device != null) { //Remove listener so buttons don't show for a while before changing the view device.removePluginsChangedListener(pluginsChangedListener); device.removePairingCallback(pairingCallback); device.rejectPairing(); } mActivity.onDeviceSelected(null); } }); } }); return rootView; } final Device.PluginsChangedListener pluginsChangedListener = new Device.PluginsChangedListener() { @Override public void onPluginsChanged(final Device device) { refreshUI(); } }; @Override public void onDestroyView() { BackgroundService.RunCommand(mActivity, new BackgroundService.InstanceCallback() { @Override public void onServiceStart(BackgroundService service) { Device device = service.getDevice(mDeviceId); if (device == null) return; device.removePluginsChangedListener(pluginsChangedListener); device.removePairingCallback(pairingCallback); } }); super.onDestroyView(); } @Override public void onPrepareOptionsMenu(Menu menu) { //Log.e("DeviceFragment", "onPrepareOptionsMenu"); super.onPrepareOptionsMenu(menu); menu.clear(); if (device == null) { return; } //Plugins button list final Collection<Plugin> plugins = device.getLoadedPlugins().values(); for (final Plugin p : plugins) { if (!p.displayInContextMenu()) { continue; } menu.add(p.getActionName()).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { p.startMainActivity(mActivity); return true; } }); } menu.add(R.string.device_menu_plugins).setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { Intent intent = new Intent(mActivity, SettingsActivity.class); intent.putExtra("deviceId", mDeviceId); startActivity(intent); return true; } }); if (device.isPaired() && device.isReachable()) { menu.add(R.string.encryption_info_title) .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { Context context = mActivity; AlertDialog.Builder builder = new AlertDialog.Builder(context); builder.setTitle(context.getResources().getString(R.string.encryption_info_title)); builder.setPositiveButton(context.getResources().getString(R.string.ok), new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.dismiss(); } }); if (device.certificate == null) { builder.setMessage(R.string.encryption_info_msg_no_ssl); } else { builder.setMessage(context.getResources().getString(R.string.my_device_fingerprint) + "\n" + SslHelper.getCertificateHash(SslHelper.certificate) + "\n\n" + context.getResources().getString(R.string.remote_device_fingerprint) + "\n" + SslHelper.getCertificateHash(device.certificate)); } builder.create().show(); return true; } }); } if (device.isPaired()) { menu.add(R.string.device_menu_unpair) .setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem menuItem) { //Remove listener so buttons don't show for a while before changing the view device.removePluginsChangedListener(pluginsChangedListener); device.removePairingCallback(pairingCallback); device.unpair(); mActivity.onDeviceSelected(null); return true; } }); } } @Override public void onResume() { super.onResume(); getView().setFocusableInTouchMode(true); getView().requestFocus(); getView().setOnKeyListener(new View.OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { if (event.getAction() == KeyEvent.ACTION_UP && keyCode == KeyEvent.KEYCODE_BACK) { boolean fromDeviceList = getArguments().getBoolean("fromDeviceList", false); // Handle back button so we go to the list of devices in case we came from there if (fromDeviceList) { mActivity.onDeviceSelected(null); return true; } } return false; } }); } void refreshUI() { //Log.e("DeviceFragment", "refreshUI"); if (device == null || rootView == null) { return; } //Once in-app, there is no point in keep displaying the notification if any device.hidePairingNotification(); mActivity.runOnUiThread(new Runnable() { @Override public void run() { if (device.isPairRequestedByPeer()) { ((TextView) rootView.findViewById(R.id.pair_message)).setText(R.string.pair_requested); rootView.findViewById(R.id.pair_progress).setVisibility(View.GONE); rootView.findViewById(R.id.pair_button).setVisibility(View.GONE); rootView.findViewById(R.id.pair_request).setVisibility(View.VISIBLE); } else { boolean paired = device.isPaired(); boolean reachable = device.isReachable(); boolean onData = NetworkHelper.isOnMobileNetwork(getContext()); rootView.findViewById(R.id.pairing_buttons).setVisibility(paired ? View.GONE : View.VISIBLE); rootView.findViewById(R.id.not_reachable_message) .setVisibility((paired && !reachable && !onData) ? View.VISIBLE : View.GONE); rootView.findViewById(R.id.on_data_message) .setVisibility((paired && !reachable && onData) ? View.VISIBLE : View.GONE); try { ArrayList<ListAdapter.Item> items = new ArrayList<>(); //Plugins button list final Collection<Plugin> plugins = device.getLoadedPlugins().values(); for (final Plugin p : plugins) { if (!p.hasMainActivity()) continue; if (p.displayInContextMenu()) continue; items.add(new PluginItem(p, new View.OnClickListener() { @Override public void onClick(View v) { p.startMainActivity(mActivity); } })); } //Failed plugins List final ConcurrentHashMap<String, Plugin> failed = device.getFailedPlugins(); if (!failed.isEmpty()) { if (errorHeader == null) { errorHeader = new TextView(mActivity); errorHeader.setPadding(0, ((int) (28 * getResources().getDisplayMetrics().density)), 0, ((int) (8 * getResources().getDisplayMetrics().density))); errorHeader.setOnClickListener(null); errorHeader.setOnLongClickListener(null); errorHeader.setText(getResources().getString(R.string.plugins_failed_to_load)); } items.add(new CustomItem(errorHeader)); for (Map.Entry<String, Plugin> entry : failed.entrySet()) { String pluginKey = entry.getKey(); final Plugin plugin = entry.getValue(); if (plugin == null) { items.add(new SmallEntryItem(pluginKey)); } else { items.add( new SmallEntryItem(plugin.getDisplayName(), new View.OnClickListener() { @Override public void onClick(View v) { plugin.getErrorDialog(mActivity).show(); } })); } } } ListView buttonsList = (ListView) rootView.findViewById(R.id.buttons_list); ListAdapter adapter = new ListAdapter(mActivity, items); buttonsList.setAdapter(adapter); mActivity.invalidateOptionsMenu(); } catch (IllegalStateException e) { e.printStackTrace(); //Ignore: The activity was closed while we were trying to update it } catch (ConcurrentModificationException e) { Log.e("DeviceActivity", "ConcurrentModificationException"); this.run(); //Try again } } } }); } final Device.PairingCallback pairingCallback = new Device.PairingCallback() { @Override public void incomingRequest() { refreshUI(); } @Override public void pairingSuccessful() { refreshUI(); } @Override public void pairingFailed(final String error) { mActivity.runOnUiThread(new Runnable() { @Override public void run() { if (rootView == null) return; ((TextView) rootView.findViewById(R.id.pair_message)).setText(error); rootView.findViewById(R.id.pair_progress).setVisibility(View.GONE); rootView.findViewById(R.id.pair_button).setVisibility(View.VISIBLE); rootView.findViewById(R.id.pair_request).setVisibility(View.GONE); refreshUI(); } }); } @Override public void unpaired() { mActivity.runOnUiThread(new Runnable() { @Override public void run() { if (rootView == null) return; ((TextView) rootView.findViewById(R.id.pair_message)).setText(R.string.device_not_paired); rootView.findViewById(R.id.pair_progress).setVisibility(View.GONE); rootView.findViewById(R.id.pair_button).setVisibility(View.VISIBLE); rootView.findViewById(R.id.pair_request).setVisibility(View.GONE); refreshUI(); } }); } }; public static void acceptPairing(final String devId, final MaterialActivity activity) { final DeviceFragment frag = new DeviceFragment(devId, activity); BackgroundService.RunCommand(activity, new BackgroundService.InstanceCallback() { public void onServiceStart(BackgroundService service) { Device dev = service.getDevice(devId); activity.getSupportActionBar().setTitle(dev.getName()); dev.addPairingCallback(frag.pairingCallback); dev.addPluginsChangedListener(frag.pluginsChangedListener); frag.device = dev; frag.device.acceptPairing(); frag.refreshUI(); } }); } public static void rejectPairing(final String devId, final MaterialActivity activity) { final DeviceFragment frag = new DeviceFragment(devId, activity); BackgroundService.RunCommand(activity, new BackgroundService.InstanceCallback() { public void onServiceStart(BackgroundService service) { Device dev = service.getDevice(devId); activity.getSupportActionBar().setTitle(dev.getName()); dev.addPairingCallback(frag.pairingCallback); dev.addPluginsChangedListener(frag.pluginsChangedListener); frag.device = dev; //Remove listener so buttons don't show for a while before changing the view frag.device.removePluginsChangedListener(frag.pluginsChangedListener); frag.device.removePairingCallback(frag.pairingCallback); frag.device.rejectPairing(); activity.onDeviceSelected(null); frag.refreshUI(); } }); } }