1 /* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.gallery3d.ui; 18 19 import android.content.Context; 20 import android.os.StatFs; 21 22 import com.android.gallery3d.app.AbstractGalleryActivity; 23 import com.android.gallery3d.util.ThreadPool.JobContext; 24 25 import java.io.File; 26 27 public class CacheStorageUsageInfo { 28 @SuppressWarnings("unused") 29 private static final String TAG = "CacheStorageUsageInfo"; 30 31 // number of bytes the storage has. 32 private long mTotalBytes; 33 34 // number of bytes already used. 35 private long mUsedBytes; 36 37 // number of bytes used for the cache (should be less then usedBytes). 38 private long mUsedCacheBytes; 39 40 // number of bytes used for the cache if all pending downloads (and removals) are completed. 41 private long mTargetCacheBytes; 42 43 private AbstractGalleryActivity mActivity; 44 private Context mContext; 45 private long mUserChangeDelta; 46 47 public CacheStorageUsageInfo(AbstractGalleryActivity activity) { 48 mActivity = activity; 49 mContext = activity.getAndroidContext(); 50 } 51 52 public void increaseTargetCacheSize(long delta) { 53 mUserChangeDelta += delta; 54 } 55 56 public void loadStorageInfo(JobContext jc) { 57 File cacheDir = mContext.getExternalCacheDir(); 58 if (cacheDir == null) { 59 cacheDir = mContext.getCacheDir(); 60 } 61 62 String path = cacheDir.getAbsolutePath(); 63 StatFs stat = new StatFs(path); 64 long blockSize = stat.getBlockSize(); 65 long availableBlocks = stat.getAvailableBlocks(); 66 long totalBlocks = stat.getBlockCount(); 67 68 mTotalBytes = blockSize * totalBlocks; 69 mUsedBytes = blockSize * (totalBlocks - availableBlocks); 70 mUsedCacheBytes = mActivity.getDataManager().getTotalUsedCacheSize(); 71 mTargetCacheBytes = mActivity.getDataManager().getTotalTargetCacheSize(); 72 } 73 74 public long getTotalBytes() { 75 return mTotalBytes; 76 } 77 78 public long getExpectedUsedBytes() { 79 return mUsedBytes - mUsedCacheBytes + mTargetCacheBytes + mUserChangeDelta; 80 } 81 82 public long getUsedBytes() { 83 // Should it be usedBytes - usedCacheBytes + targetCacheBytes ? 84 return mUsedBytes; 85 } 86 87 public long getFreeBytes() { 88 return mTotalBytes - mUsedBytes; 89 } 90 } 91
