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.djkim.slap.createGroup; import android.app.AlertDialog; import android.app.Dialog; import android.content.DialogInterface; import android.content.Intent; import android.os.Bundle; import android.content.DialogInterface; import android.content.Intent; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentStatePagerAdapter; import android.support.v4.view.ViewPager; import android.support.v7.app.ActionBarActivity; import android.support.v7.widget.Toolbar; import android.util.Log; import android.util.TypedValue; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.Toast; import com.djkim.slap.R; import com.djkim.slap.menubar.MainActivity; import com.djkim.slap.models.Group; import com.djkim.slap.models.GroupCallback; import com.djkim.slap.models.User; import com.djkim.slap.models.Utils; import com.djkim.slap.selectionModel.ModelCallbacks; import com.djkim.slap.selectionModel.Page; import com.djkim.slap.selectionModel.PageFragmentCallbacks; import com.djkim.slap.selectionModel.ReviewFragment; import com.djkim.slap.selectionModel.ReviewItem; import com.djkim.slap.selectionModel.StepPagerStrip; import com.djkim.slap.selectionModel.AbstractWizardModel; import com.facebook.CallbackManager; import com.facebook.FacebookCallback; import com.facebook.FacebookException; import com.facebook.FacebookSdk; import com.facebook.share.model.AppGroupCreationContent; import com.facebook.share.widget.CreateAppGroupDialog; import java.util.ArrayList; import java.util.List; public class CreateGroupActivity extends ActionBarActivity implements PageFragmentCallbacks, ReviewFragment.Callbacks, ModelCallbacks { public final static String CREATE_GROUP_EXTRA = "create_group_extra"; private ViewPager mPager; private MyPagerAdapter mPagerAdapter; private boolean mEditingAfterReview; private AbstractWizardModel mWizardModel = new SandwichWizardModel(this); private boolean mConsumePageSelectedEvent; private Button mNextButton; private Button mPrevButton; private List<Page> mCurrentPageSequence; private StepPagerStrip mStepPagerStrip; public Toolbar toolbar; CreateAppGroupDialog createAppGroupDialog; CallbackManager callbackManager; private Group group; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.create_group_layout); FacebookSdk.sdkInitialize(this.getApplicationContext()); callbackManager = CallbackManager.Factory.create(); createAppGroupDialog = new CreateAppGroupDialog(this); createAppGroupDialog.registerCallback(callbackManager, new FacebookCallback<CreateAppGroupDialog.Result>() { public void onSuccess(CreateAppGroupDialog.Result result) { String id = result.getId(); group.set_facebookGroupId(id); group.saveInBackground(new GroupCallback() { @Override public void done() { Toast.makeText(CreateGroupActivity.this, "Successfully created the group!", Toast.LENGTH_SHORT).show(); Intent intent = new Intent(); intent.putExtra(CREATE_GROUP_EXTRA, group); setResult(RESULT_OK, intent); finish(); } }); } public void onCancel() { group.saveInBackground(new GroupCallback() { @Override public void done() { Toast.makeText(CreateGroupActivity.this, "Failed to create the group!", Toast.LENGTH_SHORT) .show(); Intent intent = new Intent(); intent.putExtra(CREATE_GROUP_EXTRA, group); setResult(RESULT_OK, intent); finish(); } }); } public void onError(FacebookException error) { } }); if (savedInstanceState != null) { mWizardModel.load(savedInstanceState.getBundle("model")); } mWizardModel.registerListener(this); mPagerAdapter = new MyPagerAdapter(getSupportFragmentManager()); mPager = (ViewPager) findViewById(R.id.pager); mPager.setAdapter(mPagerAdapter); mStepPagerStrip = (StepPagerStrip) findViewById(R.id.strip); mStepPagerStrip.setOnPageSelectedListener(new StepPagerStrip.OnPageSelectedListener() { @Override public void onPageStripSelected(int position) { position = Math.min(mPagerAdapter.getCount() - 1, position); if (mPager.getCurrentItem() != position) { mPager.setCurrentItem(position); } } }); mNextButton = (Button) findViewById(R.id.next_button); mPrevButton = (Button) findViewById(R.id.prev_button); mPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { mStepPagerStrip.setCurrentPage(position); if (mConsumePageSelectedEvent) { mConsumePageSelectedEvent = false; return; } mEditingAfterReview = false; updateBottomBar(); } }); mNextButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (mPager.getCurrentItem() == mCurrentPageSequence.size()) { DialogFragment dg = new DialogFragment() { @Override public Dialog onCreateDialog(Bundle savedInstanceState) { return new AlertDialog.Builder(getActivity()) .setMessage(R.string.submit_confirm_message) .setPositiveButton(R.string.submit_confirm_button, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { createGroup(); onClickCreateButton(); } }) .setNegativeButton(android.R.string.cancel, null).create(); } }; dg.show(getSupportFragmentManager(), "place_order_dialog"); } else { if (mEditingAfterReview) { mPager.setCurrentItem(mPagerAdapter.getCount() - 1); } else { mPager.setCurrentItem(mPager.getCurrentItem() + 1); } } } }); mPrevButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (mPager.getCurrentItem() == 0) { setResult(RESULT_CANCELED); finish(); } else { mPager.setCurrentItem(mPager.getCurrentItem() - 1); } } }); onPageTreeChanged(); updateBottomBar(); } @Override public void onPageTreeChanged() { mCurrentPageSequence = mWizardModel.getCurrentPageSequence(); recalculateCutOffPage(); mStepPagerStrip.setPageCount(mCurrentPageSequence.size() + 1); // + 1 = review step mPagerAdapter.notifyDataSetChanged(); updateBottomBar(); } private void createGroup() { ArrayList<ReviewItem> reviewItems = new ArrayList<ReviewItem>(); for (Page page : mWizardModel.getCurrentPageSequence()) { page.getReviewItems(reviewItems); } // reviewItems: // 0: Type, 1: Name, 2: Description, 3: Capacity, 4: Skills, 5: Custom Tags String type = reviewItems.get(0).getDisplayValue(); String name = reviewItems.get(1).getDisplayValue(); String description = reviewItems.get(2).getDisplayValue(); int capacity = Integer.parseInt(reviewItems.get(3).getDisplayValue()); String skills = reviewItems.get(4).getDisplayValue(); String tags = reviewItems.get(5).getDisplayValue(); User user = Utils.get_current_user(); group = new Group(name, user, capacity, type); group.set_description(description); group.set_skills(skills); group.set_tags(tags == null ? "" : tags); } private void updateBottomBar() { int position = mPager.getCurrentItem(); if (position == 0) { mPrevButton.setText("Cancel"); } else { mPrevButton.setText("Previous"); } if (position == mCurrentPageSequence.size()) { mNextButton.setText(R.string.finish); mNextButton.setBackgroundResource(R.drawable.finish_background); //mNextButton.setTextAppearance(this, R.style.TextAppearanceFinish); } else { mNextButton.setText(mEditingAfterReview ? R.string.review : R.string.next); mNextButton.setBackgroundResource(R.drawable.selectable_item_background); TypedValue v = new TypedValue(); getTheme().resolveAttribute(android.R.attr.textAppearanceMedium, v, true); //mNextButton.setTextAppearance(this, v.resourceId); mNextButton.setEnabled(position != mPagerAdapter.getCutOffPage()); } mPrevButton.setVisibility(position < 0 ? View.INVISIBLE : View.VISIBLE); } @Override protected void onDestroy() { super.onDestroy(); mWizardModel.unregisterListener(this); } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putBundle("model", mWizardModel.save()); } @Override public AbstractWizardModel onGetModel() { return mWizardModel; } @Override public void onEditScreenAfterReview(String key) { for (int i = mCurrentPageSequence.size() - 1; i >= 0; i--) { if (mCurrentPageSequence.get(i).getKey().equals(key)) { mConsumePageSelectedEvent = true; mEditingAfterReview = true; mPager.setCurrentItem(i); updateBottomBar(); break; } } } @Override public void onPageDataChanged(Page page) { if (page.isRequired()) { if (recalculateCutOffPage()) { mPagerAdapter.notifyDataSetChanged(); updateBottomBar(); } } } @Override public Page onGetPage(String key) { return mWizardModel.findByKey(key); } private boolean recalculateCutOffPage() { // Cut off the pager adapter at first required page that isn't completed int cutOffPage = mCurrentPageSequence.size() + 1; for (int i = 0; i < mCurrentPageSequence.size(); i++) { Page page = mCurrentPageSequence.get(i); if (page.isRequired() && !page.isCompleted()) { cutOffPage = i; break; } } if (mPagerAdapter.getCutOffPage() != cutOffPage) { mPagerAdapter.setCutOffPage(cutOffPage); return true; } return false; } public class MyPagerAdapter extends FragmentStatePagerAdapter { private int mCutOffPage; private Fragment mPrimaryItem; public MyPagerAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int i) { if (i >= mCurrentPageSequence.size()) { return new ReviewFragment(); } return mCurrentPageSequence.get(i).createFragment(); } @Override public int getItemPosition(Object object) { // TODO: be smarter about this if (object == mPrimaryItem) { // Re-use the current fragment (its position never changes) return POSITION_UNCHANGED; } return POSITION_NONE; } @Override public void setPrimaryItem(ViewGroup container, int position, Object object) { super.setPrimaryItem(container, position, object); mPrimaryItem = (Fragment) object; } @Override public int getCount() { if (mCurrentPageSequence == null) { return 0; } return Math.min(mCutOffPage + 1, mCurrentPageSequence.size() + 1); } public void setCutOffPage(int cutOffPage) { if (cutOffPage < 0) { cutOffPage = Integer.MAX_VALUE; } mCutOffPage = cutOffPage; } public int getCutOffPage() { return mCutOffPage; } } private void onClickCreateButton() { AppGroupCreationContent content = new AppGroupCreationContent.Builder() .setName(group.get_name() == null ? "Enter a group name" : group.get_name()) .setDescription(group.get_description() == null ? "Enter a description" : group.get_description()) .setAppGroupPrivacy(AppGroupCreationContent.AppGroupPrivacy.Closed).build(); createAppGroupDialog.show(content); } protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); callbackManager.onActivityResult(requestCode, resultCode, data); } }