Java tutorial
/** * Copyright (c) 2012-2013, Gerald Garcia * * This file is part of Andoid Caldav Sync Adapter Free. * * Andoid Caldav Sync Adapter Free 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 3 of the * License, or at your option any later version. * * Andoid Caldav Sync Adapter Free 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 Andoid Caldav Sync Adapter Free. * If not, see <http://www.gnu.org/licenses/>. * */ package org.gege.caldavsyncadapter.authenticator; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.net.MalformedURLException; import java.net.URISyntaxException; import javax.xml.parsers.ParserConfigurationException; import org.apache.http.conn.HttpHostConnectException; import org.gege.caldavsyncadapter.R; import org.gege.caldavsyncadapter.caldav.CaldavFacade; import org.gege.caldavsyncadapter.caldav.CaldavFacade.TestConnectionResult; import org.xml.sax.SAXException; import android.accounts.Account; import android.accounts.AccountManager; import android.animation.Animator; import android.animation.AnimatorListenerAdapter; import android.annotation.TargetApi; import android.app.Activity; import android.content.Context; import android.content.pm.PackageManager.NameNotFoundException; import android.os.AsyncTask; import android.os.Build; import android.os.Bundle; import android.text.TextUtils; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.View; import android.view.inputmethod.EditorInfo; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast; /** * Activity which displays a login screen to the user, offering registration as * well. */ public class AuthenticatorActivity extends Activity { private static final String TAG = "AuthenticatorActivity"; private static final String ACCOUNT_TYPE = "org.gege.caldavsyncadapter.account"; public static final String USER_DATA_URL_KEY = "USER_DATA_URL_KEY"; public static final String USER_DATA_USERNAME = "USER_DATA_USERNAME"; public static final String USER_DATA_VERSION = "USER_DATA_VERSION"; public static final String CURRENT_USER_DATA_VERSION = "1"; public static final String ACCOUNT_NAME_SPLITTER = "@"; /** * The default email to populate the email field with. */ public static final String EXTRA_EMAIL = "com.example.android.authenticatordemo.extra.EMAIL"; /** * Keep track of the login task to ensure we can cancel it if requested. */ private UserLoginTask mAuthTask = null; // Values for email and password at the time of the login attempt. private String mUser; private String mPassword; private Context mContext; // UI references. private EditText mUserView; private EditText mPasswordView; private View mLoginFormView; private View mLoginStatusView; private TextView mLoginStatusMessageView; private AccountManager mAccountManager; private String mURL; private EditText mURLView; public AuthenticatorActivity() { super(); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mAccountManager = AccountManager.get(this); setContentView(R.layout.activity_authenticator); // Set up the login form. mUser = getIntent().getStringExtra(EXTRA_EMAIL); mUserView = (EditText) findViewById(R.id.user); mUserView.setText(mUser); mContext = getBaseContext(); mPasswordView = (EditText) findViewById(R.id.password); mPasswordView.setOnEditorActionListener(new TextView.OnEditorActionListener() { @Override public boolean onEditorAction(TextView textView, int id, KeyEvent keyEvent) { if (id == R.id.login || id == EditorInfo.IME_NULL) { attemptLogin(); return true; } return false; } }); mURLView = (EditText) findViewById(R.id.url); mLoginFormView = findViewById(R.id.login_form); mLoginStatusView = findViewById(R.id.login_status); mLoginStatusMessageView = (TextView) findViewById(R.id.login_status_message); findViewById(R.id.sign_in_button).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { attemptLogin(); } }); } @Override public boolean onCreateOptionsMenu(Menu menu) { super.onCreateOptionsMenu(menu); getMenuInflater().inflate(R.menu.activity_authenticator, menu); return true; } /** * Attempts to sign in or register the account specified by the login form. * If there are form errors (invalid email, missing fields, etc.), the * errors are presented and no actual login attempt is made. */ public void attemptLogin() { if (mAuthTask != null) { return; } // Reset errors. mUserView.setError(null); mPasswordView.setError(null); // Store values at the time of the login attempt. mUser = mUserView.getText().toString(); mPassword = mPasswordView.getText().toString(); mURL = mURLView.getText().toString(); boolean cancel = false; View focusView = null; // Check for a valid password. if (TextUtils.isEmpty(mPassword)) { mPasswordView.setError(getString(R.string.error_field_required)); focusView = mPasswordView; cancel = true; } else if (mPassword.length() < 4) { mPasswordView.setError(getString(R.string.error_invalid_password)); focusView = mPasswordView; cancel = true; } // Check for a valid email address. if (TextUtils.isEmpty(mUser)) { mUserView.setError(getString(R.string.error_field_required)); focusView = mUserView; cancel = true; } //else if (!mUser.contains("@")) { // mUserView.setError(getString(R.string.error_invalid_email)); // focusView = mUserView; // cancel = true; //} if (cancel) { // There was an error; don't attempt login and focus the first // form field with an error. focusView.requestFocus(); } else { // Show a progress spinner, and kick off a background task to // perform the user login attempt. mLoginStatusMessageView.setText(R.string.login_progress_signing_in); showProgress(true); mAuthTask = new UserLoginTask(); mAuthTask.execute((Void) null); } } /** * Shows the progress UI and hides the login form. */ @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR2) private void showProgress(final boolean show) { // On Honeycomb MR2 we have the ViewPropertyAnimator APIs, which allow // for very easy animations. If available, use these APIs to fade-in // the progress spinner. if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR2) { int shortAnimTime = getResources().getInteger(android.R.integer.config_shortAnimTime); mLoginStatusView.setVisibility(View.VISIBLE); mLoginStatusView.animate().setDuration(shortAnimTime).alpha(show ? 1 : 0) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE); } }); mLoginFormView.setVisibility(View.VISIBLE); mLoginFormView.animate().setDuration(shortAnimTime).alpha(show ? 0 : 1) .setListener(new AnimatorListenerAdapter() { @Override public void onAnimationEnd(Animator animation) { mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE); } }); } else { // The ViewPropertyAnimator APIs are not available, so simply show // and hide the relevant UI components. mLoginStatusView.setVisibility(show ? View.VISIBLE : View.GONE); mLoginFormView.setVisibility(show ? View.GONE : View.VISIBLE); } } protected enum LoginResult { MalformedURLException, GeneralSecurityException, UnkonwnException, WrongCredentials, InvalidResponse, WrongUrl, ConnectionRefused, Success_Calendar, Success_Collection, Account_Already_In_Use } /** * Represents an asynchronous login/registration task used to authenticate * the user. */ public class UserLoginTask extends AsyncTask<Void, Void, LoginResult> { @Override protected LoginResult doInBackground(Void... params) { TestConnectionResult result = null; try { CaldavFacade facade = new CaldavFacade(mUser, mPassword, mURL); String version = ""; try { version = mContext.getPackageManager().getPackageInfo(mContext.getPackageName(), 0).versionName; } catch (NameNotFoundException e) { version = "unknown"; e.printStackTrace(); } facade.setVersion(version); result = facade.testConnection(); Log.i(TAG, "testConnection status=" + result); } catch (HttpHostConnectException e) { Log.w(TAG, "testConnection", e); return LoginResult.ConnectionRefused; } catch (MalformedURLException e) { Log.w(TAG, "testConnection", e); return LoginResult.MalformedURLException; } catch (UnsupportedEncodingException e) { Log.w(TAG, "testConnection", e); return LoginResult.UnkonwnException; } catch (ParserConfigurationException e) { Log.w(TAG, "testConnection", e); return LoginResult.UnkonwnException; } catch (SAXException e) { Log.w(TAG, "testConnection", e); return LoginResult.InvalidResponse; } catch (IOException e) { Log.w(TAG, "testConnection", e); return LoginResult.UnkonwnException; } catch (URISyntaxException e) { Log.w(TAG, "testConnection", e); return LoginResult.MalformedURLException; } if (result == null) { return LoginResult.UnkonwnException; } switch (result) { case SUCCESS: boolean OldAccount = false; LoginResult Result = LoginResult.Success_Calendar; if (OldAccount) { final Account account = new Account(mUser, ACCOUNT_TYPE); if (mAccountManager.addAccountExplicitly(account, mPassword, null)) { Log.v(TAG, "new account created"); mAccountManager.setUserData(account, USER_DATA_URL_KEY, mURL); } else { Log.v(TAG, "no new account created"); Result = LoginResult.Account_Already_In_Use; } } else { final Account account = new Account(mUser + ACCOUNT_NAME_SPLITTER + mURL, ACCOUNT_TYPE); if (mAccountManager.addAccountExplicitly(account, mPassword, null)) { Log.v(TAG, "new account created"); mAccountManager.setUserData(account, USER_DATA_URL_KEY, mURL); mAccountManager.setUserData(account, USER_DATA_USERNAME, mUser); mAccountManager.setUserData(account, USER_DATA_VERSION, CURRENT_USER_DATA_VERSION); } else { Log.v(TAG, "no new account created"); Result = LoginResult.Account_Already_In_Use; } } return Result; case WRONG_CREDENTIAL: return LoginResult.WrongCredentials; case WRONG_SERVER_STATUS: return LoginResult.InvalidResponse; case WRONG_URL: return LoginResult.WrongUrl; case WRONG_ANSWER: return LoginResult.InvalidResponse; default: return LoginResult.UnkonwnException; } } @Override protected void onPostExecute(final LoginResult result) { mAuthTask = null; showProgress(false); int duration = Toast.LENGTH_SHORT; Toast toast = null; switch (result) { case Success_Calendar: toast = Toast.makeText(getApplicationContext(), R.string.success_calendar, duration); toast.show(); finish(); break; case Success_Collection: toast = Toast.makeText(getApplicationContext(), R.string.success_collection, duration); toast.show(); finish(); break; case MalformedURLException: toast = Toast.makeText(getApplicationContext(), R.string.error_incorrect_url_format, duration); toast.show(); mURLView.setError(getString(R.string.error_incorrect_url_format)); mURLView.requestFocus(); break; case InvalidResponse: toast = Toast.makeText(getApplicationContext(), R.string.error_invalid_server_answer, duration); toast.show(); mURLView.setError(getString(R.string.error_invalid_server_answer)); mURLView.requestFocus(); break; case WrongUrl: toast = Toast.makeText(getApplicationContext(), R.string.error_wrong_url, duration); toast.show(); mURLView.setError(getString(R.string.error_wrong_url)); mURLView.requestFocus(); break; case WrongCredentials: mPasswordView.setError(getString(R.string.error_incorrect_password)); mPasswordView.requestFocus(); break; case ConnectionRefused: toast = Toast.makeText(getApplicationContext(), R.string.error_connection_refused, duration); toast.show(); mURLView.setError(getString(R.string.error_connection_refused)); mURLView.requestFocus(); break; case Account_Already_In_Use: toast = Toast.makeText(getApplicationContext(), R.string.error_account_already_in_use, duration); toast.show(); mURLView.setError(getString(R.string.error_account_already_in_use)); mURLView.requestFocus(); break; default: toast = Toast.makeText(getApplicationContext(), R.string.error_unkown_error, duration); toast.show(); mURLView.setError(getString(R.string.error_unkown_error)); mURLView.requestFocus(); break; } } @Override protected void onCancelled() { mAuthTask = null; showProgress(false); } } }