Java tutorial
/* * Copyright 2013 Google Inc. * * 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.checktipsplitter.wizard.ui; import android.app.Activity; import android.graphics.Typeface; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.support.v7.app.AppCompatActivity; import android.text.TextUtils; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ListView; import android.widget.TextView; import com.checktipsplitter.R; import com.checktipsplitter.wizard.model.WizardModel; import com.checktipsplitter.rest.mashape.MashapeCurrencyExchangeRestClient; import com.checktipsplitter.utils.PrefUtils; import com.checktipsplitter.wizard.model.AbstractWizardModel; import com.checktipsplitter.wizard.model.FreeTextPage; import com.checktipsplitter.wizard.model.ModelCallbacks; import com.checktipsplitter.wizard.model.Page; import com.checktipsplitter.wizard.model.ReviewItem; import com.checktipsplitter.ui.ActivityMain; import java.util.ArrayList; import java.util.List; import retrofit.Callback; import retrofit.RetrofitError; import retrofit.client.Response; public class ReviewFragment extends ListFragment implements ModelCallbacks { private static final String FINAL_RESULT_PAGE_KEY = "final_result_page_key"; private Callbacks mCallbacks; private AbstractWizardModel mWizardModel; private List<ReviewItem> mCurrentReviewItems; private ReviewAdapter mReviewAdapter; public ReviewFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mReviewAdapter = new ReviewAdapter(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_page, container, false); TextView titleView = (TextView) rootView.findViewById(android.R.id.title); titleView.setText(R.string.review_title); titleView.setTextColor(getResources().getColor(R.color.review_green)); ListView listView = (ListView) rootView.findViewById(android.R.id.list); setListAdapter(mReviewAdapter); listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE); return rootView; } @Override public void onAttach(Activity activity) { super.onAttach(activity); if (!(((AppCompatActivity) activity).getSupportFragmentManager().getFragments() .get(0) instanceof Callbacks)) { throw new ClassCastException("Activity must implement fragment's callbacks"); } mCallbacks = (Callbacks) ((ActivityMain) activity).getSupportFragmentManager().getFragments().get(0); mWizardModel = mCallbacks.onGetModel(); mWizardModel.registerListener(this); onPageTreeChanged(); } @Override public void onPageTreeChanged() { onPageDataChanged(null); } @Override public void onDetach() { super.onDetach(); mCallbacks = null; mWizardModel.unregisterListener(this); } class CheckTipSplitter { String sourceExchange = null; String targetExchange = null; float billAmount = 0; int howMany = 0; float gratificationPercent = 0; } @Override public void onPageDataChanged(Page changedPage) { final ArrayList<ReviewItem> reviewItems = new ArrayList<ReviewItem>(); for (Page page : mWizardModel.getCurrentPageSequence()) { page.getReviewItems(reviewItems); } final CheckTipSplitter cts = new CheckTipSplitter(); for (Page page : mWizardModel.getCurrentPageSequence()) { switch (page.getKey()) { case WizardModel.BASE_EXCHANGE: cts.sourceExchange = page.getData().getString(Page.SIMPLE_DATA_KEY); break; case WizardModel.TARGET_EXCHANGE: cts.targetExchange = page.getData().getString(Page.SIMPLE_DATA_KEY); break; case WizardModel.BILL_AMOUNT_KEY: cts.billAmount = Float.valueOf(page.getData().get(FreeTextPage.DATA_KEY).toString()); break; case WizardModel.HOW_MANY_PAGE_KEY: cts.howMany = Integer.valueOf(page.getData().get(FreeTextPage.DATA_KEY).toString()); break; case WizardModel.GRATIFICATION_AMOUNT_KEY: cts.gratificationPercent = Float.valueOf(page.getData().get(FreeTextPage.DATA_KEY).toString()); break; } } float percentage = cts.billAmount * (cts.gratificationPercent / 100); final float total = (cts.billAmount + percentage) / cts.howMany; reviewItems.add(new ReviewItem("Total C/U", String.valueOf(total), FINAL_RESULT_PAGE_KEY)); if (PrefUtils.shouldSyncExchangeConversion(getActivity(), cts.sourceExchange.substring(0, 3), cts.targetExchange.substring(0, 3))) { MashapeCurrencyExchangeRestClient.get().exchange(cts.sourceExchange.substring(0, 3), cts.targetExchange.substring(0, 3), new Callback<Float>() { @Override public void success(Float aFloat, Response response) { reviewItems.add(new ReviewItem("Total " + cts.targetExchange.substring(0, 3), String.valueOf(Float.valueOf(total * aFloat)), FINAL_RESULT_PAGE_KEY)); mReviewAdapter.notifyDataSetChanged(); PrefUtils.saveLastExchangeConversionSync(getActivity(), cts.sourceExchange.substring(0, 3), cts.targetExchange.substring(0, 3)); PrefUtils.saveExchangeConversion(getActivity(), cts.sourceExchange.substring(0, 3), cts.targetExchange.substring(0, 3), aFloat); } @Override public void failure(RetrofitError error) { float savedExchangeConversion = PrefUtils.getSavedExchangeConversion(getActivity(), cts.sourceExchange.substring(0, 3), cts.targetExchange.substring(0, 3)); reviewItems.add(new ReviewItem("Total " + cts.targetExchange.substring(0, 3), String.valueOf(total * savedExchangeConversion), FINAL_RESULT_PAGE_KEY)); if (mReviewAdapter != null) { mReviewAdapter.notifyDataSetChanged(); } } }); } else { float savedExchangeConversion = PrefUtils.getSavedExchangeConversion(getActivity(), cts.sourceExchange.substring(0, 3), cts.targetExchange.substring(0, 3)); reviewItems.add(new ReviewItem("Total " + cts.targetExchange.substring(0, 3), String.valueOf(total * savedExchangeConversion), FINAL_RESULT_PAGE_KEY)); if (mReviewAdapter != null) { mReviewAdapter.notifyDataSetChanged(); } } mCurrentReviewItems = reviewItems; if (mReviewAdapter != null) { mReviewAdapter.notifyDataSetInvalidated(); } } @Override public void onListItemClick(ListView l, View v, int position, long id) { mCallbacks.onEditScreenAfterReview(mCurrentReviewItems.get(position).getPageKey()); } public interface Callbacks { AbstractWizardModel onGetModel(); void onEditScreenAfterReview(String pageKey); } private class ReviewAdapter extends BaseAdapter { @Override public boolean hasStableIds() { return true; } @Override public int getItemViewType(int position) { return 0; } @Override public int getViewTypeCount() { return 1; } @Override public boolean areAllItemsEnabled() { return true; } @Override public Object getItem(int position) { return mCurrentReviewItems.get(position); } @Override public long getItemId(int position) { return mCurrentReviewItems.get(position).hashCode(); } @Override public View getView(int position, View view, ViewGroup container) { LayoutInflater inflater = LayoutInflater.from(getActivity()); View rootView = inflater.inflate(R.layout.list_item_review, container, false); ReviewItem reviewItem = mCurrentReviewItems.get(position); String value = reviewItem.getDisplayValue(); if (TextUtils.isEmpty(value)) { value = "(None)"; } TextView tv1 = (TextView) rootView.findViewById(android.R.id.text1); tv1.setText(reviewItem.getTitle().toUpperCase()); TextView tv2 = (TextView) rootView.findViewById(android.R.id.text2); tv2.setText(value.trim()); if (reviewItem.getPageKey().equals(FINAL_RESULT_PAGE_KEY)) { tv1.setTextAppearance(getActivity(), R.style.TextAppearance_AppCompat_Medium); tv1.setTextColor(getResources().getColor(R.color.blue_main)); tv1.setTypeface(Typeface.DEFAULT_BOLD); tv2.setTextColor(getResources().getColor(R.color.blue_main)); tv2.setTypeface(Typeface.DEFAULT_BOLD); } return rootView; } @Override public int getCount() { return mCurrentReviewItems.size(); } } }