Java tutorial
/* * Copyright 2014 Uwe Trottmann * * 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.battlelancer.seriesguide.ui; import android.accounts.Account; import android.accounts.AccountManager; import android.os.AsyncTask; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.text.Editable; import android.util.Patterns; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ArrayAdapter; import android.widget.AutoCompleteTextView; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.CompoundButton.OnCheckedChangeListener; import android.widget.EditText; import android.widget.TextView; import butterknife.ButterKnife; import butterknife.InjectView; import com.battlelancer.seriesguide.R; import com.battlelancer.seriesguide.enums.NetworkResult; import com.battlelancer.seriesguide.settings.TraktCredentials; import com.battlelancer.seriesguide.util.ConnectTraktTask; import com.battlelancer.seriesguide.util.Utils; import java.util.ArrayList; import java.util.HashSet; import java.util.List; import java.util.Set; /** * Provides a user interface to connect or create a trakt account. */ public class ConnectTraktCredentialsFragment extends Fragment implements ConnectTraktTask.OnTaskFinishedListener { private ConnectTraktTask mTask; @InjectView(R.id.connectbutton) Button mButtonConnect; @InjectView(R.id.disconnectbutton) Button mButtonDisconnect; @InjectView(R.id.username) EditText mEditTextUsername; @InjectView(R.id.password) EditText mEditTextPassword; @InjectView(R.id.mailviews) View mViewsNewAccount; @InjectView(R.id.checkNewAccount) CheckBox mCheckBoxNewAccount; @InjectView(R.id.email) AutoCompleteTextView mEmailAutoCompleteView; @InjectView(R.id.status) TextView mTextViewStatus; @InjectView(R.id.progressbar) View mProgressBar; @InjectView(R.id.progress) View mStatusView; public static ConnectTraktCredentialsFragment newInstance() { return new ConnectTraktCredentialsFragment(); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /* * Try to keep the fragment around on config changes so the credentials task * does not have to be finished. */ setRetainInstance(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View v = inflater.inflate(R.layout.fragment_connect_trakt_credentials, container, false); ButterKnife.inject(this, v); // status strip mStatusView.setVisibility(View.GONE); // new account toggle mViewsNewAccount.setVisibility(View.GONE); mCheckBoxNewAccount.setOnCheckedChangeListener(new OnCheckedChangeListener() { public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { mViewsNewAccount.setVisibility(View.VISIBLE); } else { mViewsNewAccount.setVisibility(View.GONE); } } }); return v; } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setupViews(); // unfinished task around? if (mTask != null && mTask.getStatus() != AsyncTask.Status.FINISHED) { // disable buttons, show status message setButtonStates(false, false); setStatus(true, true, R.string.waitplease); } // enable e-mail completion via device accounts final Account[] accounts = AccountManager.get(getActivity()).getAccounts(); final Set<String> emailSet = new HashSet<>(); for (Account account : accounts) { if (Patterns.EMAIL_ADDRESS.matcher(account.name).matches()) { emailSet.add(account.name); } } List<String> emails = new ArrayList<>(emailSet); mEmailAutoCompleteView.setAdapter( new ArrayAdapter<String>(getActivity(), android.R.layout.simple_dropdown_item_1line, emails)); // connect button mButtonConnect.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // disable buttons, show status message setButtonStates(false, false); setStatus(true, true, R.string.waitplease); // get username and password Editable editableUsername = mEditTextUsername.getText(); String username = editableUsername != null ? editableUsername.toString().trim() : null; Editable editablePassword = mEditTextPassword.getText(); String password = editablePassword != null ? editablePassword.toString().trim() : null; // get email String email = null; if (mCheckBoxNewAccount.isChecked()) { Editable editableEmail = mEmailAutoCompleteView.getText(); email = editableEmail != null ? editableEmail.toString().trim() : null; } mTask = new ConnectTraktTask(getActivity().getApplicationContext(), ConnectTraktCredentialsFragment.this); mTask.execute(username, password, email); } }); // disconnect button mButtonDisconnect.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // TODO do this async TraktCredentials.get(getActivity()).removeCredentials(); setupViews(); } }); } private void setupViews() { boolean hasCredentials = TraktCredentials.get(getActivity()).hasCredentials(); // buttons if (hasCredentials) { setButtonStates(false, true); mEditTextUsername.setText(TraktCredentials.get(getActivity()).getUsername()); } else { setButtonStates(true, false); } // username and password mEditTextUsername.setEnabled(!hasCredentials); mEditTextPassword.setEnabled(!hasCredentials); mEditTextPassword.setText(hasCredentials ? "********" : null); // fake password // new account check box mCheckBoxNewAccount.setEnabled(!hasCredentials); } @Override public void onStart() { super.onStart(); Utils.trackView(getActivity(), "Connect Trakt Credentials"); } @Override public void onDestroyView() { super.onDestroyView(); ButterKnife.reset(this); } private void setButtonStates(boolean connectEnabled, boolean disconnectEnabled) { // guard calls, as we might get called after the views were detached if (mButtonConnect != null) { mButtonConnect.setEnabled(connectEnabled); } if (mButtonDisconnect != null) { mButtonDisconnect.setEnabled(disconnectEnabled); } } private void setStatus(boolean visible, boolean inProgress, int statusTextResourceId) { // guard calls, as we might get called after the views were detached if (mStatusView != null) { if (!visible) { mStatusView.setVisibility(View.GONE); return; } mStatusView.setVisibility(View.VISIBLE); } if (mProgressBar != null) { mProgressBar.setVisibility(inProgress ? View.VISIBLE : View.GONE); } if (mTextViewStatus != null) { mTextViewStatus.setText(statusTextResourceId); } } @Override public void onTaskFinished(int resultCode) { mTask = null; if (resultCode == NetworkResult.OFFLINE) { setStatus(true, false, R.string.offline); setButtonStates(true, false); return; } if (resultCode == NetworkResult.ERROR) { setStatus(true, false, R.string.trakt_error_credentials); setButtonStates(true, false); return; } // if we got here, looks like credentials were stored successfully // show further options after successful connection if (getFragmentManager() != null) { ConnectTraktFinishedFragment f = new ConnectTraktFinishedFragment(); FragmentTransaction ft = getFragmentManager().beginTransaction(); ft.replace(R.id.content_frame, f); ft.commitAllowingStateLoss(); } } }