Java tutorial
/* * Copyright (C) 2014 Freddie (Musenkishi) Lust-Hed * * 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.bitants.wally.fragments; import android.app.ActivityOptions; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.drawable.TransitionDrawable; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.os.Handler; import android.os.HandlerThread; import android.os.Message; import android.support.v4.app.ActivityCompat; import android.support.v4.app.ActivityOptionsCompat; import android.support.v4.app.FragmentManager; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.Toast; import com.bumptech.glide.load.resource.bitmap.GlideBitmapDrawable; import com.musenkishi.wally.R; import com.bitants.wally.activities.ImageDetailsActivity; import com.bitants.wally.activities.MainActivity; import com.bitants.wally.adapters.RecyclerImagesAdapter; import com.bitants.wally.base.GridFragment; import com.bitants.wally.base.WallyApplication; import com.musenkishi.wally.dataprovider.DataProvider; import com.musenkishi.wally.dataprovider.NetworkDataProvider; import com.musenkishi.wally.dataprovider.models.DataProviderError; import com.musenkishi.wally.dataprovider.models.SaveImageRequest; import com.musenkishi.wally.models.Image; import com.musenkishi.wally.models.ImagePage; import com.bitants.wally.notification.NotificationProvider; import com.bitants.wally.observers.FileReceiver; import com.bitants.wally.observers.FiltersChangeReceiver; import java.util.ArrayList; import java.util.HashMap; import java.util.Map; import static com.bitants.wally.observers.FileReceiver.OnFileChangeListener; import static com.bitants.wally.observers.FiltersChangeReceiver.OnFiltersChangeListener; /** * ToplistFragment is responsible for showing the user the toplist of wallpapers. * * Created by Freddie (Musenkishi) Lust-Hed on 2014-02-28 */ public class LatestFragment extends GridFragment implements RecyclerImagesAdapter.OnSaveButtonClickedListener, Handler.Callback, OnFileChangeListener, OnFiltersChangeListener { public static final String TAG = "com.musenkishi.wally.ImagesFragment"; private static final int MSG_GET_IMAGES = 119; private static final int MSG_ERROR_IMAGE_REQUEST = 121; private static final int MSG_IMAGES_REQUEST_CREATE = 122; private static final int MSG_IMAGES_REQUEST_APPEND = 123; private static final int MSG_SAVE_LIST_OF_SAVED_IMAGES = 128; private static final int MSG_ERROR_IMAGE_SAVING = 129; private static final int MSG_SAVE_BUTTON_CLICKED = 130; private static final int MSG_PAGE_RECEIVED = 131; private static final String STATE_IMAGES = TAG + ".Images"; private static final String STATE_CURRENT_PAGE = TAG + ".Current.Page"; private boolean isLoading; private Handler backgroundHandler; private Handler uiHandler; private HashMap<String, Boolean> savedFiles; private int currentPage = 1; /** * Returns a new instance of this fragment for the given section * number. */ public static LatestFragment newInstance() { LatestFragment fragment = new LatestFragment(); Bundle args = new Bundle(); fragment.setArguments(args); return fragment; } public LatestFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); setActionBarColor(getResources().getColor(R.color.Actionbar_Latest_Background)); setupHandlers(); getActivity().sendBroadcast(new Intent(FileReceiver.GET_FILES)); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, final Bundle savedInstanceState) { ViewGroup rootView = (ViewGroup) inflater.inflate(R.layout.fragment_main, container, false); if (rootView != null) { super.onCreateView(rootView); setupAutoSizeGridView(); if (savedInstanceState != null && savedInstanceState.containsKey(STATE_IMAGES)) { Message msgObj = uiHandler.obtainMessage(); msgObj.what = MSG_IMAGES_REQUEST_CREATE; msgObj.arg1 = 1; msgObj.obj = savedInstanceState.getParcelableArrayList(STATE_IMAGES); uiHandler.sendMessage(msgObj); currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE); } else { showLoader(); getImages(1, null); } ((MainActivity) getActivity()).addOnFileChangedListener(this); ((MainActivity) getActivity()).addOnFiltersChangedListener(this); } return rootView; } @Override public void onResume() { super.onResume(); } @Override public void onSaveInstanceState(Bundle outState) { if (imagesAdapter != null) { outState.putParcelableArrayList(STATE_IMAGES, imagesAdapter.getImages()); outState.putInt(STATE_CURRENT_PAGE, currentPage); } super.onSaveInstanceState(outState); } @Override public void onDestroy() { super.onDestroy(); backgroundHandler.removeCallbacksAndMessages(null); uiHandler.removeCallbacksAndMessages(null); backgroundHandler.getLooper().quit(); } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); gridView.setClipToPadding(false); setInsets(getActivity(), gridView, false, 0, view.getResources().getDimensionPixelSize(R.dimen.gridview_bottom_padding)); } private void getMoreImagesIfNeeded(int position, int totalItemCount) { int defaultNumberOfItemsPerPage = NetworkDataProvider.THUMBS_PER_PAGE; boolean shouldLoadMore = position >= totalItemCount - (defaultNumberOfItemsPerPage / 2); if (shouldLoadMore && !isLoading && imagesAdapter != null && imagesAdapter.getItemCount() > 0) { getImages(++currentPage, null); } } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.images_list, menu); MenuItem menuItemFilter = menu.findItem(R.id.action_filter); if (menuItemFilter != null) { menuItemFilter.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() { @Override public boolean onMenuItemClick(MenuItem item) { FragmentManager fragmentManager = getFragmentManager(); if (fragmentManager != null) { final FilterDialogFragment filterDialogFragment = new FilterDialogFragment(); filterDialogFragment.setPrimaryColor(getAppBarColor()); filterDialogFragment.setPositiveButton(R.string.submit, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { if (filterDialogFragment.saveChanges()) { WallyApplication.getContext().sendBroadcast( new Intent(FiltersChangeReceiver.FILTERS_CHANGED)); } } }); filterDialogFragment.setNegativeButton(R.string.cancel, null); filterDialogFragment.show(fragmentManager, FilterDialogFragment.TAG); } return false; } }); } super.onCreateOptionsMenu(menu, inflater); } private void reloadImages() { gridView.setAdapter(null); showLoader(); getImages(1, null); } private void setupHandlers() { HandlerThread handlerThread = new HandlerThread("Toplist.background"); handlerThread.start(); backgroundHandler = new Handler(handlerThread.getLooper(), this); uiHandler = new Handler(getActivity().getMainLooper(), this); } @Override protected void getImages(int index, String query) { currentPage = index; isLoading = true; Message msgGetImages = backgroundHandler.obtainMessage(); msgGetImages.what = MSG_GET_IMAGES; msgGetImages.arg1 = index; if (!backgroundHandler.hasMessages(msgGetImages.what)) { backgroundHandler.sendMessage(msgGetImages); } } private void showError(DataProviderError dataProviderError, int index) { Message msgObj = uiHandler.obtainMessage(); msgObj.what = MSG_ERROR_IMAGE_REQUEST; msgObj.obj = dataProviderError; msgObj.arg1 = index; uiHandler.sendMessageDelayed(msgObj, 1000); } @Override public void onSaveButtonClicked(final Image image) { Message msgSaveButton = backgroundHandler.obtainMessage(); msgSaveButton.what = MSG_SAVE_BUTTON_CLICKED; msgSaveButton.obj = image; backgroundHandler.sendMessage(msgSaveButton); } @Override public boolean handleMessage(Message msg) { switch (msg.what) { case MSG_GET_IMAGES: final int index = msg.arg1; WallyApplication.getDataProviderInstance().getImages(NetworkDataProvider.PATH_LATEST, index, WallyApplication.getFilterSettings(), new DataProvider.OnImagesReceivedListener() { @Override public void onImagesReceived(ArrayList<Image> images) { Message msgObj = uiHandler.obtainMessage(); msgObj.what = index == 1 ? MSG_IMAGES_REQUEST_CREATE : MSG_IMAGES_REQUEST_APPEND; msgObj.obj = images; uiHandler.sendMessage(msgObj); } @Override public void onError(DataProviderError dataProviderError) { showError(dataProviderError, index); } }); break; case MSG_SAVE_BUTTON_CLICKED: Image image = (Image) msg.obj; WallyApplication.getDataProviderInstance().getPageData(image.imagePageURL(), new DataProvider.OnPageReceivedListener() { @Override public void onPageReceived(ImagePage imagePage) { Message msgImagePage = uiHandler.obtainMessage(); msgImagePage.what = MSG_PAGE_RECEIVED; msgImagePage.obj = imagePage; uiHandler.sendMessage(msgImagePage); } @Override public void onError(DataProviderError dataProviderError) { Message msgObj = uiHandler.obtainMessage(); msgObj.what = MSG_ERROR_IMAGE_SAVING; msgObj.obj = dataProviderError; uiHandler.sendMessage(msgObj); } }); break; case MSG_PAGE_RECEIVED: ImagePage imagePage = (ImagePage) msg.obj; if (imagePage != null) { SaveImageRequest saveImageRequest = WallyApplication.getDataProviderInstance() .downloadImageIfNeeded(imagePage.imagePath(), imagePage.imageId(), getResources().getString(R.string.notification_title_image_saving)); if (saveImageRequest.getDownloadID() != null && getActivity() instanceof MainActivity) { WallyApplication.getDownloadIDs().put(saveImageRequest.getDownloadID(), imagePage.imageId()); } else { getActivity().sendBroadcast(new Intent(FileReceiver.GET_FILES)); } } break; case MSG_ERROR_IMAGE_REQUEST: if (getActivity() != null) { DataProviderError dataProviderError = (DataProviderError) msg.obj; int imagesIndex = msg.arg1; showErrorMessage(dataProviderError, imagesIndex); } break; case MSG_ERROR_IMAGE_SAVING: if (getActivity() != null) { NotificationProvider notificationProvider = new NotificationProvider(); notificationProvider.cancelAll(getActivity()); Toast.makeText(getActivity(), "Couldn't save image", Toast.LENGTH_SHORT).show(); } break; case MSG_IMAGES_REQUEST_CREATE: ArrayList<Image> images = (ArrayList<Image>) msg.obj; boolean shouldScheduleLayoutAnimation = msg.arg1 == 0; isLoading = false; if (images != null) { hideLoader(); imagesAdapter = new RecyclerImagesAdapter(images, itemSize); imagesAdapter.setOnSaveButtonClickedListener(LatestFragment.this); imagesAdapter.updateSavedFilesList(savedFiles); gridView.setAdapter(imagesAdapter); setupAdapter(); if (shouldScheduleLayoutAnimation) { gridView.scheduleLayoutAnimation(); } } break; case MSG_IMAGES_REQUEST_APPEND: ArrayList<Image> extraImages = (ArrayList<Image>) msg.obj; isLoading = false; if (extraImages != null) { hideLoader(); int endPosition = imagesAdapter.getItemCount(); ArrayList<Image> currentList = imagesAdapter.getImages(); currentList.addAll(extraImages); imagesAdapter.notifyItemRangeInserted(endPosition, extraImages.size()); } break; case MSG_SAVE_LIST_OF_SAVED_IMAGES: savedFiles = (HashMap<String, Boolean>) msg.obj; if (imagesAdapter != null) { imagesAdapter.updateSavedFilesList(savedFiles); imagesAdapter.notifySavedItemsChanged(); } break; } return false; } private void setupAdapter() { imagesAdapter.setOnGetViewListener(new RecyclerImagesAdapter.OnGetViewListener() { @Override public void onBindView(int position) { getMoreImagesIfNeeded(position, imagesAdapter.getItemCount()); } }); imagesAdapter.setOnItemClickListener(new RecyclerImagesAdapter.OnItemClickListener() { @Override public void onItemClick(View view, int position) { Image image = (Image) imagesAdapter.getItem(position); Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(image.imagePageURL()), view.getContext(), ImageDetailsActivity.class); ImageView thumbnailImageView = (ImageView) view.findViewById(R.id.thumb_image_view); Bitmap thumb = null; intent.putExtra(ImageDetailsActivity.INTENT_EXTRA_IMAGE, image); if (thumbnailImageView != null && thumbnailImageView.getDrawable() != null && thumbnailImageView.getDrawable() instanceof GlideBitmapDrawable) { GlideBitmapDrawable glideBitmapDrawable = (GlideBitmapDrawable) thumbnailImageView .getDrawable(); thumb = glideBitmapDrawable.getBitmap(); } else if (thumbnailImageView != null && thumbnailImageView.getDrawable() != null && thumbnailImageView.getDrawable() instanceof TransitionDrawable) { GlideBitmapDrawable squaringDrawable = (GlideBitmapDrawable) ((TransitionDrawable) thumbnailImageView .getDrawable()).getDrawable(1); thumb = squaringDrawable.getBitmap(); } WallyApplication.setBitmapThumb(thumb); if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { String transitionNameImage = getString(R.string.transition_image_details); ActivityOptionsCompat options = ActivityOptionsCompat .makeSceneTransitionAnimation(getActivity(), android.support.v4.util.Pair .create(view.findViewById(R.id.thumb_image_view), transitionNameImage)); ActivityCompat.startActivityForResult(getActivity(), intent, ImageDetailsActivity.REQUEST_EXTRA_TAG, options.toBundle()); } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) { view.buildDrawingCache(true); Bitmap drawingCache = view.getDrawingCache(true); Bundle bundle = ActivityOptions.makeThumbnailScaleUpAnimation(view, drawingCache, 0, 0) .toBundle(); getActivity().startActivityForResult(intent, REQUEST_CODE, bundle); } else { startActivityForResult(intent, REQUEST_CODE); } } }); } @Override public void onFiltersChange() { reloadImages(); } @Override public void onFileChange(Map<String, Boolean> existingFiles) { Message fileListMessage = uiHandler.obtainMessage(); fileListMessage.obj = existingFiles; fileListMessage.what = MSG_SAVE_LIST_OF_SAVED_IMAGES; uiHandler.sendMessage(fileListMessage); } }