Java tutorial
/* * Copyright 2015 Synced Synapse. All rights reserved. * * 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. */ package com.syncedsynapse.kore2.ui.hosts; import android.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; 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.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.GridView; import android.widget.ImageView; import android.widget.PopupMenu; import android.widget.TextView; import com.syncedsynapse.kore2.R; import com.syncedsynapse.kore2.host.HostInfo; import com.syncedsynapse.kore2.host.HostManager; import com.syncedsynapse.kore2.jsonrpc.ApiCallback; import com.syncedsynapse.kore2.jsonrpc.HostConnection; import com.syncedsynapse.kore2.jsonrpc.method.JSONRPC; import com.syncedsynapse.kore2.ui.RemoteActivity; import com.syncedsynapse.kore2.utils.LogUtils; import com.syncedsynapse.kore2.utils.UIUtils; import java.util.ArrayList; import java.util.List; import butterknife.ButterKnife; import butterknife.InjectView; import butterknife.OnClick; /** * Fragment to manage the list oof registered hosts. */ public class HostListFragment extends Fragment { private static final String TAG = LogUtils.makeLogTag(HostListFragment.class); private ArrayList<HostInfoRow> hostInfoRows = new ArrayList<HostInfoRow>(); private HostListAdapter adapter = null; private Context context; private Handler callbackHandler = new Handler(); @InjectView(R.id.list) GridView hostGridView; @InjectView(R.id.action_add_host) Button addHostButton; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { context = inflater.getContext(); ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_host_list, container, false); ButterKnife.inject(this, root); // Get the host list // TODO: This is being done synchronously !!! final HostManager hostManager = HostManager.getInstance(context); ArrayList<HostInfo> hosts = hostManager.getHosts(); HostInfo currentHost = hostManager.getHostInfo(); int currentHostPosition = 0; for (int i = 0; i < hosts.size(); i++) { if ((currentHost != null) && (hosts.get(i).getId() == currentHost.getId())) { currentHostPosition = i; } hostInfoRows.add(new HostInfoRow(hosts.get(i), HostInfoRow.HOST_STATUS_CONNECTING)); } // Setup the adapter hostGridView.setEmptyView(root.findViewById(android.R.id.empty)); adapter = new HostListAdapter(context, R.layout.grid_item_host, hostInfoRows); hostGridView.setAdapter(adapter); hostGridView.setItemChecked(currentHostPosition, true); hostGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long itemId) { HostInfoRow clickedHostRow = hostInfoRows.get(position); // Set the clicked host active hostManager.switchHost(clickedHostRow.hostInfo); Intent intent = new Intent(context, RemoteActivity.class); context.startActivity(intent); // switch (clickedHostRow.status) { // case HostInfoRow.HOST_STATUS_CONNECTING: // // Jsut switch the host // hostManager.switchHost(clickedHostRow.hostInfo); // break; // case HostInfoRow.HOST_STATUS_AVAILABLE: // // Set the clicked host active // hostManager.switchHost(clickedHostRow.hostInfo); // Intent intent = new Intent(context, RemoteActivity.class) // .addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); // context.startActivity(intent); // break; // case HostInfoRow.HOST_STATUS_UNAVAILABLE: // hostManager.switchHost(clickedHostRow.hostInfo); // // Check host status again // clickedHostRow.status = HostInfoRow.HOST_STATUS_CONNECTING; // adapter.notifyDataSetChanged(); // updateHostStatus(clickedHostRow); // break; // } } }); return root; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // Indicate that this fragment would like to influence the set of actions in the action bar. setHasOptionsMenu(true); } @Override public void onResume() { super.onResume(); // Launch check on each host for (HostInfoRow hostInfoRow : hostInfoRows) { updateHostStatus(hostInfoRow); } } @Override public void onPause() { super.onPause(); } /** * Pings the host to checks it status. * <br/> * Depending on whether it gets a response or not, updates {@link HostInfoRow} status, and * notifies the adapter of the change * * @param hostInfoRow Host to check */ private void updateHostStatus(final HostInfoRow hostInfoRow) { final HostConnection hostConnection = new HostConnection(hostInfoRow.hostInfo); JSONRPC.Ping ping = new JSONRPC.Ping(); ping.execute(hostConnection, new ApiCallback<String>() { @Override public void onSucess(String result) { hostInfoRow.status = HostInfoRow.HOST_STATUS_AVAILABLE; hostConnection.disconnect(); if (adapter != null) adapter.notifyDataSetChanged(); } @Override public void onError(int errorCode, String description) { hostInfoRow.status = HostInfoRow.HOST_STATUS_UNAVAILABLE; hostConnection.disconnect(); if (adapter != null) adapter.notifyDataSetChanged(); } }, callbackHandler); } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.host_manager, menu); super.onCreateOptionsMenu(menu, inflater); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.action_add_host: startAddHostWizard(); break; default: break; } return super.onOptionsItemSelected(item); } @OnClick(R.id.action_add_host) public void onAddHostClicked(View v) { startAddHostWizard(); } /** * Starts add host activity */ public void startAddHostWizard() { Intent launchIntent = new Intent(getActivity(), AddHostActivity.class) .addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP); startActivity(launchIntent); getActivity().overridePendingTransition(R.anim.activity_in, R.anim.activity_out); } /** * Auxiliary class to represent a host row in the list view */ private class HostInfoRow { public HostInfo hostInfo; public static final int HOST_STATUS_CONNECTING = 0, HOST_STATUS_AVAILABLE = 1, HOST_STATUS_UNAVAILABLE = 2; /** Host status */ public int status; public HostInfoRow(HostInfo host, int status) { this.hostInfo = host; this.status = status; } } private View.OnClickListener hostlistItemMenuClickListener = new View.OnClickListener() { @Override public void onClick(View v) { final HostInfo hostInfo = (HostInfo) v.getTag(); final PopupMenu popupMenu = new PopupMenu(getActivity(), v); popupMenu.getMenuInflater().inflate(R.menu.hostlist_item, popupMenu.getMenu()); popupMenu.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { switch (item.getItemId()) { case R.id.action_remove_host: DialogFragment confirmDelete = ConfirmDeleteDialogFragment .getInstance(getDeleteDialogListener(hostInfo.getId())); confirmDelete.show(getFragmentManager(), "confirmdelete"); return true; case R.id.action_edit_host: Intent launchIntent = new Intent(getActivity(), EditHostActivity.class) .addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP) .putExtra(HostFragmentManualConfiguration.HOST_ID, hostInfo.getId()); startActivity(launchIntent); getActivity().overridePendingTransition(R.anim.activity_in, R.anim.activity_out); return true; case R.id.action_wake_up: // Send WoL magic packet on a new thread UIUtils.sendWolAsync(getActivity(), hostInfo); return true; } return false; } }); popupMenu.show(); } }; /** * Adapter used to show the hosts in the {@link GridView} */ private class HostListAdapter extends ArrayAdapter<HostInfoRow> { public HostListAdapter(Context context, int resource, List<HostInfoRow> objects) { super(context, resource, objects); } @Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { convertView = LayoutInflater.from(getActivity()).inflate(R.layout.grid_item_host, parent, false); } final HostInfoRow item = this.getItem(position); ((TextView) convertView.findViewById(R.id.host_name)).setText(item.hostInfo.getName()); String hostAddress = item.hostInfo.getAddress() + ":" + item.hostInfo.getHttpPort(); ((TextView) convertView.findViewById(R.id.host_address)).setText(hostAddress); ImageView statusIndicator = (ImageView) convertView.findViewById(R.id.status_indicator); // TODO: Change this colors to depend on the current theme // int statusText; int statusColor; switch (item.status) { case HostInfoRow.HOST_STATUS_CONNECTING: statusColor = getActivity().getResources().getColor(R.color.host_status_connecting); // statusText = R.string.connecting_to_xbmc; break; case HostInfoRow.HOST_STATUS_UNAVAILABLE: statusColor = getActivity().getResources().getColor(R.color.host_status_unavailable); // statusText = item.isCurrentHost? R.string.unable_to_connect_to_xbmc : R.string.xbmc_unavailable; break; case HostInfoRow.HOST_STATUS_AVAILABLE: statusColor = getActivity().getResources().getColor(R.color.host_status_available); // statusText = item.isCurrentHost? R.string.connected_to_xbmc : R.string.xbmc_available; break; default: throw new RuntimeException("Invalid host status"); } statusIndicator.setColorFilter(statusColor); // ((TextView)convertView.findViewById(R.id.status_text)).setText(statusText); // For the popupmenu ImageView contextMenu = (ImageView) convertView.findViewById(R.id.list_context_menu); contextMenu.setTag(item.hostInfo); contextMenu.setOnClickListener(hostlistItemMenuClickListener); return convertView; } } private ConfirmDeleteDialogFragment.ConfirmDeleteDialogListener getDeleteDialogListener(final int hostId) { return new ConfirmDeleteDialogFragment.ConfirmDeleteDialogListener() { @Override public void onDialogPositiveClick() { HostManager hostManager = HostManager.getInstance(getActivity()); hostManager.deleteHost(hostId); for (int i = 0; i < hostInfoRows.size(); i++) { if (hostInfoRows.get(i).hostInfo.getId() == hostId) { hostInfoRows.remove(i); break; } } adapter.notifyDataSetChanged(); } @Override public void onDialogNegativeClick() { // Do nothing } }; } /** * Confirm host delete fragment */ public static class ConfirmDeleteDialogFragment extends DialogFragment { /** Interface for communication with the enclosing fragment */ public interface ConfirmDeleteDialogListener { public void onDialogPositiveClick(); public void onDialogNegativeClick(); } private ConfirmDeleteDialogListener mListener; public static ConfirmDeleteDialogFragment getInstance(ConfirmDeleteDialogListener listener) { ConfirmDeleteDialogFragment frag = new ConfirmDeleteDialogFragment(); frag.mListener = listener; return frag; } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { // Use the Builder class for convenient dialog construction AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setTitle(R.string.delete_xbmc).setMessage(R.string.delete_xbmc_confirm) .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { mListener.onDialogPositiveClick(); } }).setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { mListener.onDialogNegativeClick(); } }); // Create the AlertDialog object and return it return builder.create(); } } }