Java tutorial
/* * Twittnuker - Twitter client for Android * * Copyright (C) 2013-2014 vanita5 <mail@vanita5.de> * * This program incorporates a modified version of Twidere. * Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package de.vanita5.twittnuker.util.imageloader; import static de.vanita5.twittnuker.util.TwidereLinkify.PATTERN_TWITTER_PROFILE_IMAGES; import static de.vanita5.twittnuker.util.Utils.getImageLoaderHttpClient; import static de.vanita5.twittnuker.util.Utils.getNormalTwitterProfileImage; import static de.vanita5.twittnuker.util.Utils.getRedirectedHttpResponse; import static de.vanita5.twittnuker.util.Utils.getTwitterAuthorization; import static de.vanita5.twittnuker.util.Utils.getTwitterProfileImageOfSize; import android.content.Context; import android.net.Uri; import android.text.TextUtils; import com.nostra13.universalimageloader.core.assist.ContentLengthInputStream; import com.nostra13.universalimageloader.core.download.BaseImageDownloader; import de.vanita5.twittnuker.Constants; import de.vanita5.twittnuker.R; import de.vanita5.twittnuker.model.Account; import de.vanita5.twittnuker.model.Account.AccountWithCredentials; import de.vanita5.twittnuker.model.ParcelableMedia; import de.vanita5.twittnuker.util.MediaPreviewUtils; import de.vanita5.twittnuker.util.Utils; import twitter4j.TwitterException; import twitter4j.auth.Authorization; import twitter4j.http.HttpClientWrapper; import twitter4j.http.HttpResponse; import java.io.IOException; import java.io.InputStream; import java.util.Locale; public class TwidereImageDownloader extends BaseImageDownloader implements Constants { private final Context mContext; private HttpClientWrapper mClient; private boolean mFastImageLoading; private final boolean mFullImage; private final String mTwitterProfileImageSize; public TwidereImageDownloader(final Context context, final boolean fullImage) { super(context); mContext = context; mFullImage = fullImage; mTwitterProfileImageSize = context.getString(R.string.profile_image_size); reloadConnectivitySettings(); } public void reloadConnectivitySettings() { mClient = getImageLoaderHttpClient(mContext); mFastImageLoading = mContext.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE) .getBoolean(KEY_FAST_IMAGE_LOADING, true); } @Override protected InputStream getStreamFromNetwork(final String uriString, final Object extras) throws IOException { if (uriString == null) return null; final ParcelableMedia media = MediaPreviewUtils.getAllAvailableImage(uriString, mFullImage, mFullImage || !mFastImageLoading ? mClient : null); try { final String mediaUrl = media != null ? media.media_url : uriString; if (isTwitterProfileImage(uriString)) { final String replaced = getTwitterProfileImageOfSize(mediaUrl, mTwitterProfileImageSize); return getStreamFromNetworkInternal(replaced, extras); } else return getStreamFromNetworkInternal(mediaUrl, extras); } catch (final TwitterException e) { final int statusCode = e.getStatusCode(); if (statusCode != -1 && isTwitterProfileImage(uriString) && !uriString.contains("_normal.")) { try { return getStreamFromNetworkInternal(getNormalTwitterProfileImage(uriString), extras); } catch (final TwitterException e2) { } } throw new IOException( String.format(Locale.US, "Error downloading image %s, error code: %d", uriString, statusCode)); } } private String getReplacedUri(final Uri uri, final String apiUrlFormat) { if (uri == null) return null; if (apiUrlFormat == null) return uri.toString(); if (isTwitterUri(uri)) { final StringBuilder sb = new StringBuilder(); final String domain = uri.getHost().replaceAll("\\.?twitter.com", ""); final String path = uri.getPath(); sb.append(Utils.getApiUrl(apiUrlFormat, domain, path)); final String query = uri.getQuery(); if (!TextUtils.isEmpty(query)) { sb.append("?"); sb.append(query); } final String fragment = uri.getFragment(); if (!TextUtils.isEmpty(fragment)) { sb.append("#"); sb.append(fragment); } return sb.toString(); } return uri.toString(); } private ContentLengthInputStream getStreamFromNetworkInternal(final String uriString, final Object extras) throws IOException, TwitterException { final Uri uri = Uri.parse(uriString); final Authorization auth; final AccountWithCredentials account; if (isTwitterAuthRequired(uri) && extras instanceof AccountExtra) { final AccountExtra accountExtra = (AccountExtra) extras; account = Account.getAccountWithCredentials(mContext, accountExtra.account_id); auth = getTwitterAuthorization(mContext, accountExtra.account_id); } else { account = null; auth = null; } final String modifiedUri = getReplacedUri(uri, account != null ? account.api_url_format : null); final HttpResponse resp = getRedirectedHttpResponse(mClient, modifiedUri, uriString, auth); return new ContentLengthInputStream(resp.asStream(), (int) resp.getContentLength()); } private boolean isTwitterAuthRequired(final Uri uri) { if (uri == null) return false; return "ton.twitter.com".equalsIgnoreCase(uri.getHost()); } private boolean isTwitterProfileImage(final String uriString) { if (TextUtils.isEmpty(uriString)) return false; return PATTERN_TWITTER_PROFILE_IMAGES.matcher(uriString).matches(); } private boolean isTwitterUri(final Uri uri) { if (uri == null) return false; return "ton.twitter.com".equalsIgnoreCase(uri.getHost()); } }