Java tutorial
/******************************************************************************* * Copyright (c) 2012 Humberto Fraga <xisberto@gmail.com>. * All rights reserved. This program and the accompanying materials * are made available under the terms of the GNU Public License v3.0 * which accompanies this distribution, and is available at * http://www.gnu.org/licenses/gpl.html * * Contributors: * Humberto Fraga <xisberto@gmail.com> - initial API and implementation ******************************************************************************/ package net.xisberto.phonetodesktop; import java.util.List; import net.xisberto.phonetodesktop.MainFragment.PhoneToDesktopAuthorization; import net.xisberto.phonetodesktop.network.ListAsyncTask; import net.xisberto.phonetodesktop.network.ListAsyncTask.TaskListTaskListener; import android.accounts.AccountManager; import android.app.AlertDialog; import android.app.Dialog; import android.content.BroadcastReceiver; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.support.v4.content.LocalBroadcastManager; import android.view.View; import android.view.View.OnClickListener; import com.actionbarsherlock.app.SherlockFragmentActivity; import com.actionbarsherlock.view.Window; import com.google.android.gms.common.GooglePlayServicesUtil; import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential; import com.google.api.services.tasks.model.TaskList; public class MainActivity extends SherlockFragmentActivity implements OnClickListener, TaskListTaskListener, PhoneToDesktopAuthorization { public static final int REQUEST_GOOGLE_PLAY_SERVICES = 0; public static final int REQUEST_AUTHORIZATION = 1; public static final int REQUEST_ACCOUNT_PICKER = 2; private static final String TAG_MAIN = "mainFragment"; private GoogleAccountCredential credential; public Preferences preferences; private ListAsyncTask listManager; private MainFragment mainFragment; private Fragment currentFragment; private boolean showWelcome; private BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (intent.hasExtra(Utils.EXTRA_UPDATING)) { updateMainLayout(intent.getBooleanExtra(Utils.EXTRA_UPDATING, false)); } } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS); setContentView(R.layout.activity_main); preferences = new Preferences(this); credential = GoogleAccountCredential.usingOAuth2(this, Utils.scopes); credential.setSelectedAccountName(preferences.loadAccountName()); if (savedInstanceState == null) { FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); if (preferences.loadAccountName() == null) { showWelcome = true; currentFragment = WelcomeFragment.newInstance(); transaction.replace(R.id.main_frame, currentFragment); } else { showWelcome = false; mainFragment = MainFragment.newInstance(); transaction.replace(R.id.main_frame, mainFragment, TAG_MAIN); } transaction.commit(); } else { mainFragment = (MainFragment) getSupportFragmentManager().findFragmentByTag(TAG_MAIN); } String action = getIntent().getAction(); if (action != null && action.equals(Utils.ACTION_AUTHENTICATE)) { updateMainLayout(true); startAuthorization(); } } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); switch (requestCode) { case REQUEST_ACCOUNT_PICKER: Utils.log("Result from Account Picker"); if (resultCode == RESULT_OK && data != null && data.hasExtra(AccountManager.KEY_ACCOUNT_NAME)) { String accountName = data.getExtras().getString(AccountManager.KEY_ACCOUNT_NAME); Utils.log("Saving account " + accountName); if (accountName != null) { if (currentFragment instanceof WelcomeFragment) { mainFragment = (MainFragment) getSupportFragmentManager().findFragmentByTag(TAG_MAIN); if (mainFragment == null) { mainFragment = MainFragment.newInstance(); } updateMainLayout(true); getSupportFragmentManager().beginTransaction().replace(R.id.main_frame, mainFragment) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE).commit(); } credential.setSelectedAccountName(accountName); preferences.saveAccountName(accountName); // If PhoneToDesktop has'nt been authorized by the user // this will lead to an UserRecoverableAuthIOException // that will generate an onActivityResult for // REQUEST_AUTHENTICATION asyncRequestLists(); } } else { // User cancelled, or any other error during authorization // updateMainLayout(false); } break; case REQUEST_GOOGLE_PLAY_SERVICES: Utils.log("Result from Play Services error"); startAuthorization(); break; case REQUEST_AUTHORIZATION: Utils.log("Result from Authorization"); if (resultCode == RESULT_OK) { asyncRequestLists(); } else { updateMainLayout(false); } break; default: break; } } @Override protected void onStart() { super.onStart(); LocalBroadcastManager.getInstance(this).registerReceiver(receiver, new IntentFilter(Utils.ACTION_AUTHENTICATE)); } @Override protected void onStop() { super.onStop(); LocalBroadcastManager.getInstance(this).unregisterReceiver(receiver); } @Override public void onClick(View v) { } @Override public void startAuthorization() { if (checkGooglePlayServicesAvailable()) { // ask user to choose account startActivityForResult(credential.newChooseAccountIntent(), REQUEST_ACCOUNT_PICKER); } } /** Check that Google Play services APK is installed and up to date. */ public boolean checkGooglePlayServicesAvailable() { final int connectionStatusCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this); if (GooglePlayServicesUtil.isUserRecoverableError(connectionStatusCode)) { showGooglePlayServicesAvailabilityErrorDialog(connectionStatusCode); return false; } return true; } public void showGooglePlayServicesAvailabilityErrorDialog(final int connectionStatusCode) { runOnUiThread(new Runnable() { public void run() { Dialog dialog = GooglePlayServicesUtil.getErrorDialog(connectionStatusCode, MainActivity.this, REQUEST_GOOGLE_PLAY_SERVICES); dialog.show(); } }); } private void updateMainLayout(boolean updating) { Utils.log("updating layout " + updating); if (mainFragment != null) { mainFragment.setUpdating(updating); if (mainFragment.isVisible()) { mainFragment.updateMainLayout(); } } } private void asyncRequestLists() { listManager = new ListAsyncTask(this); listManager.execute(ListAsyncTask.REQUEST_LOAD_LISTS); } private void asyncSaveList() { listManager = new ListAsyncTask(this); listManager.execute(ListAsyncTask.REQUEST_SAVE_LIST); } @Override public void selectList(List<TaskList> tasklists) { if (tasklists != null) { if (preferences.loadListId() == null) { // We don't have a list id saved. Search in the server // for a list with the title PhoneToDesktop String serverListId = null; for (TaskList taskList : tasklists) { if (taskList.getTitle().equals(Utils.LIST_TITLE)) { serverListId = taskList.getId(); break; } } if (serverListId == null) { // The server doesn't have any list named PhoneToDesktop // We create it and save its id asyncSaveList(); // returning at this point to keep the progress return; } else { // The server has a list named PhoneToDesktop // We save its id preferences.saveListId(serverListId); } } else { // We have a saved id. Let's search this id in server boolean serverHasList = false; for (TaskList taskList : tasklists) { if (taskList.getId().equals(preferences.loadListId())) { serverHasList = true; break; } } if (!serverHasList) { // The server has no list with this id // We create a new list and save its id asyncSaveList(); // returning at this point to keep the progress return; } // else // We have the list id and found the same id in server // nothing to do here } } if (showWelcome) { startActivity(new Intent(this, TutorialActivity.class)); showWelcome = false; } updateMainLayout(false); } @Override public void saveList(String listId) { preferences.saveListId(listId); updateMainLayout(false); } @Override public void showRetryMessage(int request) { switch (request) { case ListAsyncTask.REQUEST_LOAD_LISTS: RetryDialog dialog = RetryDialog.newInstance(this); dialog.show(getSupportFragmentManager(), "retry_dialog"); break; default: break; } } public static class RetryDialog extends DialogFragment implements DialogInterface.OnClickListener { private MainActivity activity; public static RetryDialog newInstance(MainActivity act) { RetryDialog dialog = new RetryDialog(); dialog.activity = act; return dialog; } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(activity).setTitle(R.string.app_name) .setMessage(R.string.txt_retry).setPositiveButton(android.R.string.yes, this) .setNegativeButton(android.R.string.no, this); return dialogBuilder.create(); } @Override public void onClick(DialogInterface dialog, int which) { switch (which) { case DialogInterface.BUTTON_POSITIVE: activity.asyncRequestLists(); dialog.dismiss(); case DialogInterface.BUTTON_NEGATIVE: activity.updateMainLayout(false); dialog.dismiss(); } } } }