1 /* 2 * Copyright (C) 2013 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.launcher3; 18 19 import android.app.Activity; 20 import android.content.ContentValues; 21 import android.content.Context; 22 import android.database.Cursor; 23 import android.database.sqlite.SQLiteDatabase; 24 import android.database.sqlite.SQLiteOpenHelper; 25 import android.graphics.Bitmap; 26 import android.graphics.BitmapFactory; 27 import android.graphics.drawable.BitmapDrawable; 28 import android.graphics.drawable.Drawable; 29 import android.util.Log; 30 import android.util.Pair; 31 import android.view.LayoutInflater; 32 import android.view.View; 33 import android.view.ViewGroup; 34 import android.widget.BaseAdapter; 35 import android.widget.ListAdapter; 36 37 import java.io.File; 38 import java.io.FileOutputStream; 39 import java.io.IOException; 40 import java.util.ArrayList; 41 42 43 public class SavedWallpaperImages extends BaseAdapter implements ListAdapter { 44 private static String TAG = "Launcher3.SavedWallpaperImages"; 45 private ImageDb mDb; 46 ArrayList<SavedWallpaperTile> mImages; 47 Context mContext; 48 LayoutInflater mLayoutInflater; 49 50 public static class SavedWallpaperTile extends WallpaperPickerActivity.FileWallpaperInfo { 51 private int mDbId; 52 public SavedWallpaperTile(int dbId, File target, Drawable thumb) { 53 super(target, thumb); 54 mDbId = dbId; 55 } 56 57 @Override 58 public void onDelete(WallpaperPickerActivity a) { 59 a.getSavedImages().deleteImage(mDbId); 60 } 61 } 62 63 public SavedWallpaperImages(Activity context) { 64 // We used to store the saved images in the cache directory, but that meant they'd get 65 // deleted sometimes-- move them to the data directory 66 ImageDb.moveFromCacheDirectoryIfNecessary(context); 67 mDb = new ImageDb(context); 68 mContext = context; 69 mLayoutInflater = context.getLayoutInflater(); 70 } 71 72 public void loadThumbnailsAndImageIdList() { 73 mImages = new ArrayList<SavedWallpaperTile>(); 74 SQLiteDatabase db = mDb.getReadableDatabase(); 75 Cursor result = db.query(ImageDb.TABLE_NAME, 76 new String[] { ImageDb.COLUMN_ID, 77 ImageDb.COLUMN_IMAGE_THUMBNAIL_FILENAME, 78 ImageDb.COLUMN_IMAGE_FILENAME}, // cols to return 79 null, // select query 80 null, // args to select query 81 null, 82 null, 83 ImageDb.COLUMN_ID + " DESC", 84 null); 85 86 while (result.moveToNext()) { 87 String filename = result.getString(1); 88 File file = new File(mContext.getFilesDir(), filename); 89 90 Bitmap thumb = BitmapFactory.decodeFile(file.getAbsolutePath()); 91 if (thumb != null) { 92 mImages.add(new SavedWallpaperTile(result.getInt(0), 93 new File(mContext.getFilesDir(), result.getString(2)), 94 new BitmapDrawable(thumb))); 95 } 96 } 97 result.close(); 98 } 99 100 public int getCount() { 101 return mImages.size(); 102 } 103 104 public SavedWallpaperTile getItem(int position) { 105 return mImages.get(position); 106 } 107 108 public long getItemId(int position) { 109 return position; 110 } 111 112 public View getView(int position, View convertView, ViewGroup parent) { 113 Drawable thumbDrawable = mImages.get(position).mThumb; 114 if (thumbDrawable == null) { 115 Log.e(TAG, "Error decoding thumbnail for wallpaper #" + position); 116 } 117 return WallpaperPickerActivity.createImageTileView( 118 mLayoutInflater, convertView, parent, thumbDrawable); 119 } 120 121 private Pair<String, String> getImageFilenames(int id) { 122 SQLiteDatabase db = mDb.getReadableDatabase(); 123 Cursor result = db.query(ImageDb.TABLE_NAME, 124 new String[] { ImageDb.COLUMN_IMAGE_THUMBNAIL_FILENAME, 125 ImageDb.COLUMN_IMAGE_FILENAME }, // cols to return 126 ImageDb.COLUMN_ID + " = ?", // select query 127 new String[] { Integer.toString(id) }, // args to select query 128 null, 129 null, 130 null, 131 null); 132 if (result.getCount() > 0) { 133 result.moveToFirst(); 134 String thumbFilename = result.getString(0); 135 String imageFilename = result.getString(1); 136 result.close(); 137 return new Pair<String, String>(thumbFilename, imageFilename); 138 } else { 139 return null; 140 } 141 } 142 143 public void deleteImage(int id) { 144 Pair<String, String> filenames = getImageFilenames(id); 145 File imageFile = new File(mContext.getFilesDir(), filenames.first); 146 imageFile.delete(); 147 File thumbFile = new File(mContext.getFilesDir(), filenames.second); 148 thumbFile.delete(); 149 SQLiteDatabase db = mDb.getWritableDatabase(); 150 db.delete(ImageDb.TABLE_NAME, 151 ImageDb.COLUMN_ID + " = ?", // SELECT query 152 new String[] { 153 Integer.toString(id) // args to SELECT query 154 }); 155 } 156 157 public void writeImage(Bitmap thumbnail, byte[] imageBytes) { 158 try { 159 File imageFile = File.createTempFile("wallpaper", "", mContext.getFilesDir()); 160 FileOutputStream imageFileStream = 161 mContext.openFileOutput(imageFile.getName(), Context.MODE_PRIVATE); 162 imageFileStream.write(imageBytes); 163 imageFileStream.close(); 164 165 File thumbFile = File.createTempFile("wallpaperthumb", "", mContext.getFilesDir()); 166 FileOutputStream thumbFileStream = 167 mContext.openFileOutput(thumbFile.getName(), Context.MODE_PRIVATE); 168 thumbnail.compress(Bitmap.CompressFormat.JPEG, 95, thumbFileStream); 169 thumbFileStream.close(); 170 171 SQLiteDatabase db = mDb.getWritableDatabase(); 172 ContentValues values = new ContentValues(); 173 values.put(ImageDb.COLUMN_IMAGE_THUMBNAIL_FILENAME, thumbFile.getName()); 174 values.put(ImageDb.COLUMN_IMAGE_FILENAME, imageFile.getName()); 175 db.insert(ImageDb.TABLE_NAME, null, values); 176 } catch (IOException e) { 177 Log.e(TAG, "Failed writing images to storage " + e); 178 } 179 } 180 181 static class ImageDb extends SQLiteOpenHelper { 182 final static int DB_VERSION = 1; 183 final static String TABLE_NAME = "saved_wallpaper_images"; 184 final static String COLUMN_ID = "id"; 185 final static String COLUMN_IMAGE_THUMBNAIL_FILENAME = "image_thumbnail"; 186 final static String COLUMN_IMAGE_FILENAME = "image"; 187 188 Context mContext; 189 190 public ImageDb(Context context) { 191 super(context, context.getDatabasePath(LauncherFiles.WALLPAPER_IMAGES_DB).getPath(), 192 null, DB_VERSION); 193 // Store the context for later use 194 mContext = context; 195 } 196 197 public static void moveFromCacheDirectoryIfNecessary(Context context) { 198 // We used to store the saved images in the cache directory, but that meant they'd get 199 // deleted sometimes-- move them to the data directory 200 File oldSavedImagesFile = new File(context.getCacheDir(), 201 LauncherFiles.WALLPAPER_IMAGES_DB); 202 File savedImagesFile = context.getDatabasePath(LauncherFiles.WALLPAPER_IMAGES_DB); 203 if (oldSavedImagesFile.exists()) { 204 oldSavedImagesFile.renameTo(savedImagesFile); 205 } 206 } 207 @Override 208 public void onCreate(SQLiteDatabase database) { 209 database.execSQL("CREATE TABLE IF NOT EXISTS " + TABLE_NAME + " (" + 210 COLUMN_ID + " INTEGER NOT NULL, " + 211 COLUMN_IMAGE_THUMBNAIL_FILENAME + " TEXT NOT NULL, " + 212 COLUMN_IMAGE_FILENAME + " TEXT NOT NULL, " + 213 "PRIMARY KEY (" + COLUMN_ID + " ASC) " + 214 ");"); 215 } 216 217 @Override 218 public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 219 if (oldVersion != newVersion) { 220 // Delete all the records; they'll be repopulated as this is a cache 221 db.execSQL("DELETE FROM " + TABLE_NAME); 222 } 223 } 224 } 225 } 226
