Java tutorial
/* * Copyright 2011 Google Inc. All Rights Reserved. * Copyright 2011 Google Inc. 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.pacoapp.paco.ui; import java.io.IOException; import java.nio.charset.UnsupportedCharsetException; import java.util.Collections; import java.util.Comparator; import java.util.Date; import java.util.List; import java.util.Map; import org.codehaus.jackson.JsonParseException; import org.codehaus.jackson.map.JsonMappingException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.google.common.base.Strings; import com.google.common.collect.Lists; import com.pacoapp.paco.R; import com.pacoapp.paco.UserPreferences; import com.pacoapp.paco.model.Experiment; import com.pacoapp.paco.model.ExperimentProviderUtil; import com.pacoapp.paco.net.ExperimentUrlBuilder; import com.pacoapp.paco.net.NetworkClient; import com.pacoapp.paco.net.NetworkUtil; import com.pacoapp.paco.net.PacoForegroundService; import android.annotation.SuppressLint; import android.app.ProgressDialog; import android.content.Context; import android.content.Intent; import android.graphics.drawable.ColorDrawable; import android.os.Bundle; import android.provider.Settings; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ArrayAdapter; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.TextView; import android.widget.Toast; /** * */ public class FindExperimentsActivity extends ActionBarActivity implements NetworkActivityLauncher, NetworkClient, NavigationDrawerFragment.NavigationDrawerCallbacks { public static final int REFRESHING_EXPERIMENTS_DIALOG_ID = 1001; public static final int JOIN_REQUEST_CODE = 1; public static final int JOINED_EXPERIMENT = 1; static final Integer DOWNLOAD_LIMIT = 20; private static Logger Log = LoggerFactory.getLogger(FindExperimentsActivity.class); private ExperimentProviderUtil experimentProviderUtil; private ListView list; private ProgressDialog p; private ViewGroup mainLayout; public UserPreferences userPrefs; protected AvailableExperimentsListAdapter adapter; private List<Experiment> experiments = Lists.newArrayList(); private ProgressDialogFragment newFragment; private ProgressBar progressBar; private String experimentCursor; private boolean loadedAllExperiments; private NavigationDrawerFragment mNavigationDrawerFragment; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.debug("FindExperimentsActivity onCreate"); mainLayout = (ViewGroup) getLayoutInflater().inflate(R.layout.find_experiments, null); setContentView(mainLayout); ActionBar actionBar = getSupportActionBar(); actionBar.setLogo(R.drawable.ic_launcher); actionBar.setDisplayUseLogoEnabled(true); actionBar.setDisplayShowHomeEnabled(true); actionBar.setBackgroundDrawable(new ColorDrawable(0xff4A53B3)); actionBar.setDisplayHomeAsUpEnabled(true); // Set up the drawer. // mNavigationDrawerFragment = (NavigationDrawerFragment) getSupportFragmentManager().findFragmentById(R.id.navigation_drawer); // mNavigationDrawerFragment.setUp(R.id.navigation_drawer, (DrawerLayout) findViewById(R.id.drawer_layout)); Intent intent = getIntent(); userPrefs = new UserPreferences(this); list = (ListView) findViewById(R.id.find_experiments_list); // createListHeader(); // createRefreshHeader(); experimentProviderUtil = new ExperimentProviderUtil(this); progressBar = (ProgressBar) findViewById(R.id.findExperimentsProgressBar); reloadAdapter(); list.setItemsCanFocus(true); list.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView<?> listview, View textview, int position, long id) { Experiment experiment = experiments.get(position); getIntent().putExtra(Experiment.EXPERIMENT_SERVER_ID_EXTRA_KEY, experiment.getServerId()); String action = getIntent().getAction(); if (Intent.ACTION_PICK.equals(action) || Intent.ACTION_GET_CONTENT.equals(action)) { // The caller is waiting for us to return an experiment selected by // the user. The have clicked on one, so return it now. Intent resultIntent = new Intent(); resultIntent.putExtra(Experiment.EXPERIMENT_SERVER_ID_EXTRA_KEY, experiment.getServerId()); setResult(RESULT_OK, resultIntent); } else { Intent experimentIntent = new Intent(FindExperimentsActivity.this, ExperimentDetailActivity.class); experimentIntent.putExtra(Experiment.EXPERIMENT_SERVER_ID_EXTRA_KEY, experiment.getServerId()); experimentIntent.putExtra(ExperimentDetailActivity.ID_FROM_MY_EXPERIMENTS_FILE, false); startActivityForResult(experimentIntent, JOIN_REQUEST_CODE); } } }); registerForContextMenu(list); } @Override public void onNavigationDrawerItemSelected(int position) { //navDrawerList.setItemChecked(position, true); switch (position) { case 0: // we are here launchMyCurrentExperiments(); break; case 1: launchFindMyExperiments(); break; case 2: launchFindPublicExperiments(); break; case 3: launchCompletedExperiments(); break; default: break; } } public void restoreActionBar() { ActionBar actionBar = getSupportActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); actionBar.setDisplayShowTitleEnabled(true); actionBar.setTitle("Paco"); } @SuppressLint("NewApi") @Override public boolean onCreateOptionsMenu(Menu menu) { int pos = 1; if (true || !mNavigationDrawerFragment.isDrawerOpen()) { getMenuInflater().inflate(R.menu.main, menu); //restoreActionBar(); // TODO hide find experiments (this is that item) // TODO make refresh be an always action MenuItem findExperiments = menu.getItem(0); findExperiments.setVisible(false); MenuItem refreshExperiments = menu.getItem(1); refreshExperiments.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS); return true; } return super.onCreateOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); if (id == R.id.action_refreshMenuItem) { if (!NetworkUtil.isConnected(this)) { showDialogById(NetworkUtil.NO_NETWORK_CONNECTION); } else { refreshList(); } return true; } else if (id == R.id.action_settings) { launchSettings(); return true; } else if (id == R.id.action_preferences) { launchPreferences(); return true; } else if (id == R.id.action_about) { launchAbout(); return true; } else if (id == R.id.action_user_guide) { launchHelp(); return true; } else if (id == R.id.action_user_agreement) { launchEula(); return true; } else if (id == R.id.action_open_source_libs) { launchOpenSourceLibs(); return true; } else if (id == R.id.action_email_paco_team) { launchEmailPacoTeam(); return true; } else if (id == R.id.action_troubleshooting) { launchTroubleshooting(); return true; } else if (id == android.R.id.home) { finish(); return true; } return super.onOptionsItemSelected(item); } private void launchTroubleshooting() { startActivity(new Intent(this, TroubleshootingActivity.class)); } private void launchFindExperiments() { startActivity(new Intent(this, FindMyOrAllExperimentsChooserActivity.class)); } private void launchFindMyExperiments() { startActivity(new Intent(this, FindMyExperimentsActivity.class)); } private void launchFindPublicExperiments() { startActivity(new Intent(this, FindExperimentsActivity.class)); } private void launchCompletedExperiments() { //startActivity(new Intent(this, CompletedExperimentsActivity.class)); } private void launchOpenSourceLibs() { startActivity(new Intent(this, OpenSourceLicenseListActivity.class)); } private void launchSettings() { startActivity(new Intent(this, SettingsActivity.class)); } private void launchPreferences() { startActivity(new Intent(this, PreferencesActivity.class)); } private void launchEula() { Intent eulaIntent = new Intent(this, EulaDisplayActivity.class); startActivity(eulaIntent); } private void launchHelp() { startActivity(new Intent(this, HelpActivity.class)); } private void launchAbout() { Intent startIntent = new Intent(this, WelcomeActivity.class); startActivity(startIntent); } private void launchEmailPacoTeam() { Intent emailIntent = new Intent(android.content.Intent.ACTION_SEND); String aEmailList[] = { getString(R.string.contact_email) }; emailIntent.putExtra(android.content.Intent.EXTRA_EMAIL, aEmailList); emailIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, getString(R.string.email_subject_paco_feedback)); emailIntent.setType("plain/text"); startActivity(emailIntent); } @Override protected void onResume() { super.onResume(); Log.debug("FindExperimentsActivity onResume"); if (userPrefs.getAccessToken() == null) { Intent acctChooser = new Intent(this, SplashActivity.class); this.startActivity(acctChooser); } else { if (userPrefs.isAvailableExperimentsListStale()) { refreshList(); } } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == JOIN_REQUEST_CODE) { if (resultCode == JOINED_EXPERIMENT) { setResult(resultCode); finish(); } } } private TextView createListHeader() { TextView listHeader = (TextView) findViewById(R.id.ExperimentListTitle); String header = null; header = getString(R.string.find_public_experiments_title); listHeader.setText(header); listHeader.setTextSize(25); return listHeader; } // private TextView createRefreshHeader() { // TextView listHeader = (TextView)findViewById(R.id.ExperimentRefreshTitle); // DateTime lastRefresh = userPrefs.getAvailableExperimentListRefreshTime(); // if (lastRefresh == null) { // listHeader.setVisibility(View.GONE); // } else { // String lastRefreshTime = TimeUtil.dateTimeNoZoneFormatter.print(lastRefresh); // String header = getString(R.string.last_refreshed) + ": " + lastRefreshTime; // listHeader.setText(header); // listHeader.setTextSize(15); // } // return listHeader; // } private void saveRefreshTime() { userPrefs.setAvailableExperimentListRefreshTime(new Date().getTime()); // TextView listHeader = (TextView)findViewById(R.id.ExperimentRefreshTitle); // DateTime lastRefresh = userPrefs.getAvailableExperimentListRefreshTime(); // String header = getString(R.string.last_refreshed) + ": " + TimeUtil.dateTimeNoZoneFormatter.print(lastRefresh); // listHeader.setText(header); } public void showNetworkConnectionActivity() { try { startActivityForResult(new Intent(Settings.ACTION_WIRELESS_SETTINGS), NetworkUtil.ENABLED_NETWORK); } catch (Exception e) { } } protected void refreshList() { progressBar.setVisibility(View.VISIBLE); final String myExperimentsUrl = ExperimentUrlBuilder.buildUrlForPublicExperiments(userPrefs, experimentCursor, FindExperimentsActivity.DOWNLOAD_LIMIT); new PacoForegroundService(this, myExperimentsUrl).execute(); } private void dismissAnyDialog() { if (newFragment != null) { newFragment = null; FragmentManager ft = getSupportFragmentManager(); DialogFragment prev = (DialogFragment) getSupportFragmentManager().findFragmentByTag("dialog"); if (prev != null && prev.isResumed()) { prev.dismissAllowingStateLoss(); } } } // Visible for testing public void updateDownloadedExperiments(String contentAsString) { String oldCursor = experimentCursor; try { Map<String, Object> results = ExperimentProviderUtil.fromDownloadedEntitiesJson(contentAsString); String newExperimentCursor = (String) results.get("cursor"); List<Experiment> newExperiments = (List<Experiment>) results.get("results"); if (experimentCursor == null) { // we have either not loaded before or are starting over experiments = newExperiments; Collections.sort(experiments, new Comparator<Experiment>() { @Override public int compare(Experiment lhs, Experiment rhs) { return lhs.getExperimentDAO().getTitle().toLowerCase() .compareTo(rhs.getExperimentDAO().getTitle().toLowerCase()); } }); experimentCursor = newExperimentCursor; saveExperimentsToDisk(); } else { experiments.addAll(newExperiments); // we are mid-pagination so just add the new batch to the existing. // Map<Long, Experiment> existingAndNewExperimentsMap = Maps.newConcurrentMap(); // for(Experiment existingExperiment : experiments) { // existingAndNewExperimentsMap.put(existingExperiment.getServerId(), existingExperiment); // } // for (Experiment experiment : newExperiments) { // existingAndNewExperimentsMap.put(experiment.getServerId(), experiment); // } // experiments = Lists.newArrayList(existingAndNewExperimentsMap.values()); // Collections.sort(experiments, new Comparator<Experiment>() { // // @Override // public int compare(Experiment lhs, Experiment rhs) { // return lhs.getExperimentDAO().getTitle().toLowerCase().compareTo(rhs.getExperimentDAO().getTitle().toLowerCase()); // } // // }); experimentCursor = newExperimentCursor; saveExperimentsToDisk(); } if (newExperimentCursor == null || newExperimentCursor.equals(oldCursor)) { experimentCursor = null; // we have hit the end. The next refresh starts over Toast.makeText(this, R.string.no_more_experiments_on_server, Toast.LENGTH_LONG).show(); } else { Toast.makeText(this, R.string.load_more_experiments_from_server, Toast.LENGTH_LONG).show(); ; } reloadAdapter(); } catch (JsonParseException e) { showFailureDialog(NetworkUtil.CONTENT_ERROR); } catch (JsonMappingException e) { showFailureDialog(NetworkUtil.CONTENT_ERROR); } catch (UnsupportedCharsetException e) { showFailureDialog(NetworkUtil.CONTENT_ERROR); } catch (IOException e) { showFailureDialog(NetworkUtil.CONTENT_ERROR); } } private void saveExperimentsToDisk() { try { String contentAsString = experimentProviderUtil.getJson(experiments); experimentProviderUtil.saveExperimentsToDisk(contentAsString); } catch (JsonParseException e) { showFailureDialog(NetworkUtil.CONTENT_ERROR); } catch (JsonMappingException e) { showFailureDialog(NetworkUtil.CONTENT_ERROR); } catch (UnsupportedCharsetException e) { showFailureDialog(NetworkUtil.CONTENT_ERROR); } catch (IOException e) { showFailureDialog(NetworkUtil.CONTENT_ERROR); } } // Visible for testing public void reloadAdapter() { if (experiments == null || experiments.isEmpty()) { experiments = experimentProviderUtil.loadExperimentsFromDisk(false); } adapter = new AvailableExperimentsListAdapter(FindExperimentsActivity.this, R.id.find_experiments_list, experiments); list.setAdapter(adapter); } protected void showDialogById(int id) { // DialogFragment.show() will take care of adding the fragment // in a transaction. We also want to remove any currently showing // dialog, so make our own transaction and take care of that here. FragmentTransaction ft = getSupportFragmentManager().beginTransaction(); Fragment prev = getSupportFragmentManager().findFragmentByTag("dialog"); if (prev != null) { ft.remove(prev); } ft.addToBackStack(null); // Create and show the dialog. newFragment = ProgressDialogFragment.newInstance(id); newFragment.show(ft, "dialog"); // ft.commit(); } private void showFailureDialog(String status) { if (status.equals(NetworkUtil.CONTENT_ERROR) || status.equals(NetworkUtil.RETRIEVAL_ERROR)) { showDialogById(NetworkUtil.INVALID_DATA_ERROR); } else { showDialogById(NetworkUtil.SERVER_ERROR); } } private class AvailableExperimentsListAdapter extends ArrayAdapter<Experiment> { private LayoutInflater mInflater; AvailableExperimentsListAdapter(Context context, int resourceId, List<Experiment> experiments) { super(context, resourceId, experiments); mInflater = LayoutInflater.from(context); } public View getView(int position, View convertView, ViewGroup parent) { View view = convertView; if (view == null) { view = mInflater.inflate(R.layout.experiments_available_list_row, null); } Experiment experiment = getItem(position); if (experiment != null) { TextView title = (TextView) view.findViewById(R.id.experimentListRowTitle); TextView creator = (TextView) view.findViewById(R.id.experimentListRowCreator); if (title != null) { title.setText(experiment.getExperimentDAO().getTitle()); title.setOnClickListener(myButtonListener); } if (creator != null) { StringBuilder buf = new StringBuilder(); String organizationEmail = experiment.getExperimentDAO().getOrganization(); if (!Strings.isNullOrEmpty(organizationEmail) && !"null".equals(organizationEmail)) { buf.append(organizationEmail); buf.append(", "); } String contactEmail = experiment.getExperimentDAO().getContactEmail(); if (Strings.isNullOrEmpty(contactEmail) || "null".equals(contactEmail)) { contactEmail = experiment.getExperimentDAO().getCreator(); } buf.append(contactEmail); creator.setText(buf.toString()); creator.setOnClickListener(myButtonListener); } // ImageView iv = (ImageView) view.findViewById(R.id.experimentIconView); // iv.setImageBitmap(Bitmap.create(cursor.getString(iconColumn))); } return view; } private OnClickListener myButtonListener = new OnClickListener() { @Override public void onClick(final View v) { final int position = list.getPositionForView(v); if (position == ListView.INVALID_POSITION) { return; } else { final Long experimentServerId = (Long) v.getTag(); final Experiment experiment = experiments.get(position); getIntent().putExtra(Experiment.EXPERIMENT_SERVER_ID_EXTRA_KEY, experiment.getServerId()); String action = getIntent().getAction(); Intent experimentIntent = new Intent(FindExperimentsActivity.this, ExperimentDetailActivity.class); experimentIntent.putExtra(Experiment.EXPERIMENT_SERVER_ID_EXTRA_KEY, experiment.getServerId()); experimentIntent.putExtra(ExperimentDetailActivity.ID_FROM_MY_EXPERIMENTS_FILE, false); startActivityForResult(experimentIntent, JOIN_REQUEST_CODE); } } }; } @Override protected void onSaveInstanceState(Bundle outState) { // if (newFragment != null) { // outState.putInt("dialog_id", newFragment.getDialogTypeId()); // } dismissAnyDialog(); super.onSaveInstanceState(outState); } @Override protected void onRestoreInstanceState(Bundle savedInstanceState) { super.onRestoreInstanceState(savedInstanceState); } @Override public Context getContext() { return this; } @Override public void show(final String msg) { runOnUiThread(new Runnable() { @Override public void run() { Toast.makeText(FindExperimentsActivity.this, msg, Toast.LENGTH_LONG); } }); } @Override public void showAndFinish(final String msg) { runOnUiThread(new Runnable() { @Override public void run() { progressBar.setVisibility(View.GONE); if (msg != null) { Toast.makeText(FindExperimentsActivity.this, R.string.experiment_list_download_complete, Toast.LENGTH_LONG); updateDownloadedExperiments(msg); saveRefreshTime(); } else { showFailureDialog(getString(R.string.could_not_retrieve_experiments_try_again_)); } } }); } @Override public void handleException(final Exception exception) { runOnUiThread(new Runnable() { @Override public void run() { progressBar.setVisibility(View.GONE); Toast.makeText(FindExperimentsActivity.this, "Exception: " + exception.getMessage(), Toast.LENGTH_LONG); } }); } }