Java tutorial
/* * Copyright 2012 Bo Zhu <zhu@xecurity.ca> * * 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 ca.xecure.easychip; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.support.v4.app.Fragment; import android.os.Bundle; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import ca.mint.mintchip.contract.MintChipException; import static ca.xecure.easychip.CommonUtilities.*; import static ca.xecure.easychip.MintChipUtilities.getFormattedBalance; import static ca.xecure.easychip.MintChipUtilities.getMintChip; import static android.support.v4.app.FragmentActivity.MODE_PRIVATE; public class IntroductionFragment extends Fragment { TextView view_steps; TextView view_email; TextView view_balance; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.introfrag, container, false); view_steps = (TextView) view.findViewById(R.id.steps); view_email = (TextView) view.findViewById(R.id.email); view_balance = (TextView) view.findViewById(R.id.balance); update_info(); getActivity().registerReceiver(update_info_handler, new IntentFilter(UPDATE_INFO_ACTION)); return view; } public void update_info() { try { getMintChip(); } catch (MintChipException ex) { view_steps.setText("No MintChip is found!"); } try { getMintChip(); view_steps.setText(R.string.steps); view_balance.setText("Balance: " + getFormattedBalance()); } catch (MintChipException ex) { view_steps.setText("No MintChip is found!"); view_balance.setText("Balance: $0"); } String email_address = getActivity().getSharedPreferences(PREF_FILE_NAME, MODE_PRIVATE) .getString(EMAIL_ADDRESS_PREF, null); if (email_address != null) { view_email.setText(email_address); } else { view_email.setText(""); } } private final BroadcastReceiver update_info_handler = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { Log.v(LOG_TAG, "handler to update info"); update_info(); } }; }