74 lines
2.6 KiB
Java
74 lines
2.6 KiB
Java
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2014 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.util;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.net.ConnectivityManager;
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import android.support.v4.net.ConnectivityManagerCompat;
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import android.text.TextUtils;
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import com.nostra13.universalimageloader.cache.disc.DiskCache;
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import com.nostra13.universalimageloader.core.ImageLoader;
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import java.io.File;
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import static org.mariotaku.twidere.TwidereConstants.SHARED_PREFERENCES_NAME;
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import static org.mariotaku.twidere.constant.SharedPreferenceConstants.KEY_PRELOAD_WIFI_ONLY;
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/**
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* @author mariotaku
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*/
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public class ImagePreloader {
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public static final String LOGTAG = "ImagePreloader";
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private final SharedPreferences mPreferences;
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private final DiskCache mDiskCache;
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private final ImageLoader mImageLoader;
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private final ConnectivityManager mConnectivityManager;
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public ImagePreloader(final Context context, final ImageLoader loader) {
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mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
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mPreferences = context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE);
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mImageLoader = loader;
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mDiskCache = loader.getDiskCache();
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}
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public File getCachedImageFile(final String url) {
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if (url == null) return null;
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final File cache = mDiskCache.get(url);
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if (ImageValidator.isValid(ImageValidator.checkImageValidity(cache)))
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return cache;
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else {
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preloadImage(url);
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}
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return null;
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}
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public void preloadImage(final String url) {
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if (TextUtils.isEmpty(url)) return;
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if (ConnectivityManagerCompat.isActiveNetworkMetered(mConnectivityManager)
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&& mPreferences.getBoolean(KEY_PRELOAD_WIFI_ONLY, true)) return;
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mImageLoader.loadImage(url, null);
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}
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}
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