Java tutorial
/** * Copyright (c) 2012 Todoroo Inc * * See the file "LICENSE" for the full license governing this code. */ package com.todoroo.astrid.helper; import java.util.ArrayList; import java.util.LinkedHashSet; import java.util.List; import android.app.Activity; import android.app.AlertDialog; import android.content.BroadcastReceiver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.PackageManager; import android.content.pm.ResolveInfo; import android.os.Bundle; import android.support.v4.app.Fragment; import android.widget.ArrayAdapter; import com.timsu.astrid.R; import com.todoroo.andlib.service.Autowired; import com.todoroo.andlib.service.ContextManager; import com.todoroo.andlib.service.DependencyInjectionService; import com.todoroo.andlib.service.ExceptionService; import com.todoroo.andlib.utility.AndroidUtilities; import com.todoroo.andlib.utility.DateUtilities; import com.todoroo.andlib.utility.Preferences; import com.todoroo.astrid.activity.TaskListFragment; import com.todoroo.astrid.api.AstridApiConstants; import com.todoroo.astrid.api.SyncAction; import com.todoroo.astrid.gtasks.GtasksPreferences; import com.todoroo.astrid.service.SyncV2Service; import com.todoroo.astrid.sync.SyncResultCallback; import com.todoroo.astrid.sync.SyncV2Provider; /** * SyncActionHelper is a helper class for encapsulating UI actions * responsible for performing sync and prompting user to sign up for a new * sync service. * * In order to make this work you need to call register() and unregister() in * onResume and onPause, respectively. * * @author Tim Su <tim@astrid.com> * */ public class SyncActionHelper { public static final String PREF_LAST_AUTO_SYNC = "taskListLastAutoSync"; //$NON-NLS-1$ private final LinkedHashSet<SyncAction> syncActions = new LinkedHashSet<SyncAction>(); public final SyncResultCallback syncResultCallback; private final Activity activity; private final Fragment fragment; protected SyncActionReceiver syncActionReceiver = new SyncActionReceiver(); @Autowired SyncV2Service syncService; @Autowired ExceptionService exceptionService; // --- boilerplate public SyncActionHelper(Activity activity, Fragment fragment) { DependencyInjectionService.getInstance().inject(this); this.activity = activity; this.fragment = fragment; syncResultCallback = new ProgressBarSyncResultCallback(activity, fragment, R.id.progressBar, new Runnable() { @Override public void run() { ContextManager.getContext() .sendBroadcast(new Intent(AstridApiConstants.BROADCAST_EVENT_REFRESH)); } }); } // --- automatic sync logic public void initiateAutomaticSync() { long tasksPushedAt = Preferences.getLong(PREF_LAST_AUTO_SYNC, 0); if (DateUtilities.now() - tasksPushedAt > TaskListFragment.AUTOSYNC_INTERVAL) { performSyncServiceV2Sync(false); } } // --- sync action receiver logic /** * Receiver which receives sync provider intents * */ protected class SyncActionReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { if (intent == null || !AstridApiConstants.BROADCAST_SEND_SYNC_ACTIONS.equals(intent.getAction())) return; try { Bundle extras = intent.getExtras(); SyncAction syncAction = extras.getParcelable(AstridApiConstants.EXTRAS_RESPONSE); syncActions.add(syncAction); } catch (Exception e) { exceptionService.reportError("receive-sync-action-" + //$NON-NLS-1$ intent.getStringExtra(AstridApiConstants.EXTRAS_ADDON), e); } } } public void register() { activity.registerReceiver(syncActionReceiver, new IntentFilter(AstridApiConstants.BROADCAST_SEND_SYNC_ACTIONS)); } public void unregister() { AndroidUtilities.tryUnregisterReceiver(activity, syncActionReceiver); } public void request() { syncActions.clear(); Intent broadcastIntent = new Intent(AstridApiConstants.BROADCAST_REQUEST_SYNC_ACTIONS); activity.sendOrderedBroadcast(broadcastIntent, AstridApiConstants.PERMISSION_READ); } // --- sync logic protected void performSyncServiceV2Sync(boolean manual) { boolean syncOccurred = syncService.synchronizeActiveTasks(manual, syncResultCallback); if (syncOccurred) Preferences.setLong(PREF_LAST_AUTO_SYNC, DateUtilities.now()); } /** * Intent object with custom label returned by toString. * * @author joshuagross <joshua.gross@gmail.com> */ protected static class IntentWithLabel extends Intent { private final String label; public IntentWithLabel(Intent in, String labelIn) { super(in); label = labelIn; } @Override public String toString() { return label; } } public void performSyncAction() { List<SyncV2Provider> activeV2Providers = syncService.activeProviders(); int activeSyncs = syncActions.size() + activeV2Providers.size(); if (activeSyncs == 0) { String desiredCategory = activity.getString(R.string.SyP_label); // Get a list of all sync plugins and bring user to the prefs pane // for one of them Intent queryIntent = new Intent(AstridApiConstants.ACTION_SETTINGS); PackageManager pm = activity.getPackageManager(); List<ResolveInfo> resolveInfoList = pm.queryIntentActivities(queryIntent, PackageManager.GET_META_DATA); int length = resolveInfoList.size(); ArrayList<Intent> syncIntents = new ArrayList<Intent>(); // Loop through a list of all packages (including plugins, addons) // that have a settings action: filter to sync actions for (int i = 0; i < length; i++) { ResolveInfo resolveInfo = resolveInfoList.get(i); Intent intent = new Intent(AstridApiConstants.ACTION_SETTINGS); intent.setClassName(resolveInfo.activityInfo.packageName, resolveInfo.activityInfo.name); String category = MetadataHelper.resolveActivityCategoryName(resolveInfo, pm); if (GtasksPreferences.class.getName().equals(resolveInfo.activityInfo.name)) continue; if (resolveInfo.activityInfo.metaData != null) { Bundle metadata = resolveInfo.activityInfo.metaData; if (!metadata.getBoolean("syncAction")) //$NON-NLS-1$ continue; } if (category.equals(desiredCategory)) { syncIntents.add(new IntentWithLabel(intent, resolveInfo.activityInfo.loadLabel(pm).toString())); } } final Intent[] actions = syncIntents.toArray(new Intent[syncIntents.size()]); DialogInterface.OnClickListener listener = new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface click, int which) { fragment.startActivityForResult(actions[which], TaskListFragment.ACTIVITY_SETTINGS); } }; if (actions.length == 1) { fragment.startActivityForResult(actions[0], TaskListFragment.ACTIVITY_SETTINGS); } else { showSyncOptionMenu(actions, listener); } } else { syncService.synchronizeActiveTasks(true, syncResultCallback); } } /** * Show menu of sync options. This is shown when you're not logged into any * services, or logged into more than one. * * @param <TYPE> * @param items * @param listener */ private <TYPE> void showSyncOptionMenu(TYPE[] items, DialogInterface.OnClickListener listener) { if (items.length == 1) { listener.onClick(null, 0); return; } ArrayAdapter<TYPE> adapter = new ArrayAdapter<TYPE>(activity, android.R.layout.simple_spinner_dropdown_item, items); // show a menu of available options new AlertDialog.Builder(activity).setTitle(R.string.Sync_now_label).setAdapter(adapter, listener).show() .setOwnerActivity(activity); } }