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 android.app; 18 19 import static android.app.ActivityThread.DEBUG_CONFIGURATION; 20 21 import android.content.pm.ActivityInfo; 22 import android.content.res.AssetManager; 23 import android.content.res.CompatibilityInfo; 24 import android.content.res.Configuration; 25 import android.content.res.Resources; 26 import android.content.res.ResourcesKey; 27 import android.hardware.display.DisplayManagerGlobal; 28 import android.util.ArrayMap; 29 import android.util.DisplayMetrics; 30 import android.util.Log; 31 import android.util.Pair; 32 import android.util.Slog; 33 import android.view.Display; 34 import android.view.DisplayAdjustments; 35 36 import java.lang.ref.WeakReference; 37 import java.util.Locale; 38 39 /** @hide */ 40 public class ResourcesManager { 41 static final String TAG = "ResourcesManager"; 42 private static final boolean DEBUG = false; 43 44 private static ResourcesManager sResourcesManager; 45 private final ArrayMap<ResourcesKey, WeakReference<Resources> > mActiveResources = 46 new ArrayMap<>(); 47 private final ArrayMap<Pair<Integer, DisplayAdjustments>, WeakReference<Display>> mDisplays = 48 new ArrayMap<>(); 49 50 CompatibilityInfo mResCompatibilityInfo; 51 52 Configuration mResConfiguration; 53 54 public static ResourcesManager getInstance() { 55 synchronized (ResourcesManager.class) { 56 if (sResourcesManager == null) { 57 sResourcesManager = new ResourcesManager(); 58 } 59 return sResourcesManager; 60 } 61 } 62 63 public Configuration getConfiguration() { 64 return mResConfiguration; 65 } 66 67 DisplayMetrics getDisplayMetricsLocked() { 68 return getDisplayMetricsLocked(Display.DEFAULT_DISPLAY); 69 } 70 71 DisplayMetrics getDisplayMetricsLocked(int displayId) { 72 DisplayMetrics dm = new DisplayMetrics(); 73 final Display display = 74 getAdjustedDisplay(displayId, DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS); 75 if (display != null) { 76 display.getMetrics(dm); 77 } else { 78 dm.setToDefaults(); 79 } 80 return dm; 81 } 82 83 final void applyNonDefaultDisplayMetricsToConfigurationLocked( 84 DisplayMetrics dm, Configuration config) { 85 config.touchscreen = Configuration.TOUCHSCREEN_NOTOUCH; 86 config.densityDpi = dm.densityDpi; 87 config.screenWidthDp = (int)(dm.widthPixels / dm.density); 88 config.screenHeightDp = (int)(dm.heightPixels / dm.density); 89 int sl = Configuration.resetScreenLayout(config.screenLayout); 90 if (dm.widthPixels > dm.heightPixels) { 91 config.orientation = Configuration.ORIENTATION_LANDSCAPE; 92 config.screenLayout = Configuration.reduceScreenLayout(sl, 93 config.screenWidthDp, config.screenHeightDp); 94 } else { 95 config.orientation = Configuration.ORIENTATION_PORTRAIT; 96 config.screenLayout = Configuration.reduceScreenLayout(sl, 97 config.screenHeightDp, config.screenWidthDp); 98 } 99 config.smallestScreenWidthDp = config.screenWidthDp; // assume screen does not rotate 100 config.compatScreenWidthDp = config.screenWidthDp; 101 config.compatScreenHeightDp = config.screenHeightDp; 102 config.compatSmallestScreenWidthDp = config.smallestScreenWidthDp; 103 } 104 105 public boolean applyCompatConfiguration(int displayDensity, 106 Configuration compatConfiguration) { 107 if (mResCompatibilityInfo != null && !mResCompatibilityInfo.supportsScreen()) { 108 mResCompatibilityInfo.applyToConfiguration(displayDensity, compatConfiguration); 109 return true; 110 } 111 return false; 112 } 113 114 /** 115 * Returns an adjusted {@link Display} object based on the inputs or null if display isn't 116 * available. 117 * 118 * @param displayId display Id. 119 * @param displayAdjustments display adjustments. 120 */ 121 public Display getAdjustedDisplay(final int displayId, DisplayAdjustments displayAdjustments) { 122 final DisplayAdjustments displayAdjustmentsCopy = (displayAdjustments != null) 123 ? new DisplayAdjustments(displayAdjustments) : new DisplayAdjustments(); 124 final Pair<Integer, DisplayAdjustments> key = 125 Pair.create(displayId, displayAdjustmentsCopy); 126 synchronized (this) { 127 WeakReference<Display> wd = mDisplays.get(key); 128 if (wd != null) { 129 final Display display = wd.get(); 130 if (display != null) { 131 return display; 132 } 133 } 134 final DisplayManagerGlobal dm = DisplayManagerGlobal.getInstance(); 135 if (dm == null) { 136 // may be null early in system startup 137 return null; 138 } 139 final Display display = dm.getCompatibleDisplay(displayId, key.second); 140 if (display != null) { 141 mDisplays.put(key, new WeakReference<>(display)); 142 } 143 return display; 144 } 145 } 146 147 /** 148 * Creates the top level Resources for applications with the given compatibility info. 149 * 150 * @param resDir the resource directory. 151 * @param splitResDirs split resource directories. 152 * @param overlayDirs the resource overlay directories. 153 * @param libDirs the shared library resource dirs this app references. 154 * @param displayId display Id. 155 * @param overrideConfiguration override configurations. 156 * @param compatInfo the compatibility info. Must not be null. 157 */ 158 Resources getTopLevelResources(String resDir, String[] splitResDirs, 159 String[] overlayDirs, String[] libDirs, int displayId, 160 Configuration overrideConfiguration, CompatibilityInfo compatInfo) { 161 final float scale = compatInfo.applicationScale; 162 Configuration overrideConfigCopy = (overrideConfiguration != null) 163 ? new Configuration(overrideConfiguration) : null; 164 ResourcesKey key = new ResourcesKey(resDir, displayId, overrideConfigCopy, scale); 165 Resources r; 166 synchronized (this) { 167 // Resources is app scale dependent. 168 if (DEBUG) Slog.w(TAG, "getTopLevelResources: " + resDir + " / " + scale); 169 170 WeakReference<Resources> wr = mActiveResources.get(key); 171 r = wr != null ? wr.get() : null; 172 //if (r != null) Log.i(TAG, "isUpToDate " + resDir + ": " + r.getAssets().isUpToDate()); 173 if (r != null && r.getAssets().isUpToDate()) { 174 if (DEBUG) Slog.w(TAG, "Returning cached resources " + r + " " + resDir 175 + ": appScale=" + r.getCompatibilityInfo().applicationScale 176 + " key=" + key + " overrideConfig=" + overrideConfiguration); 177 return r; 178 } 179 } 180 181 //if (r != null) { 182 // Log.w(TAG, "Throwing away out-of-date resources!!!! " 183 // + r + " " + resDir); 184 //} 185 186 AssetManager assets = new AssetManager(); 187 // resDir can be null if the 'android' package is creating a new Resources object. 188 // This is fine, since each AssetManager automatically loads the 'android' package 189 // already. 190 if (resDir != null) { 191 if (assets.addAssetPath(resDir) == 0) { 192 return null; 193 } 194 } 195 196 if (splitResDirs != null) { 197 for (String splitResDir : splitResDirs) { 198 if (assets.addAssetPath(splitResDir) == 0) { 199 return null; 200 } 201 } 202 } 203 204 if (overlayDirs != null) { 205 for (String idmapPath : overlayDirs) { 206 assets.addOverlayPath(idmapPath); 207 } 208 } 209 210 if (libDirs != null) { 211 for (String libDir : libDirs) { 212 if (libDir.endsWith(".apk")) { 213 // Avoid opening files we know do not have resources, 214 // like code-only .jar files. 215 if (assets.addAssetPath(libDir) == 0) { 216 Log.w(TAG, "Asset path '" + libDir + 217 "' does not exist or contains no resources."); 218 } 219 } 220 } 221 } 222 223 //Log.i(TAG, "Resource: key=" + key + ", display metrics=" + metrics); 224 DisplayMetrics dm = getDisplayMetricsLocked(displayId); 225 Configuration config; 226 final boolean isDefaultDisplay = (displayId == Display.DEFAULT_DISPLAY); 227 final boolean hasOverrideConfig = key.hasOverrideConfiguration(); 228 if (!isDefaultDisplay || hasOverrideConfig) { 229 config = new Configuration(getConfiguration()); 230 if (!isDefaultDisplay) { 231 applyNonDefaultDisplayMetricsToConfigurationLocked(dm, config); 232 } 233 if (hasOverrideConfig) { 234 config.updateFrom(key.mOverrideConfiguration); 235 if (DEBUG) Slog.v(TAG, "Applied overrideConfig=" + key.mOverrideConfiguration); 236 } 237 } else { 238 config = getConfiguration(); 239 } 240 r = new Resources(assets, dm, config, compatInfo); 241 if (DEBUG) Slog.i(TAG, "Created app resources " + resDir + " " + r + ": " 242 + r.getConfiguration() + " appScale=" + r.getCompatibilityInfo().applicationScale); 243 244 synchronized (this) { 245 WeakReference<Resources> wr = mActiveResources.get(key); 246 Resources existing = wr != null ? wr.get() : null; 247 if (existing != null && existing.getAssets().isUpToDate()) { 248 // Someone else already created the resources while we were 249 // unlocked; go ahead and use theirs. 250 r.getAssets().close(); 251 return existing; 252 } 253 254 // XXX need to remove entries when weak references go away 255 mActiveResources.put(key, new WeakReference<>(r)); 256 if (DEBUG) Slog.v(TAG, "mActiveResources.size()=" + mActiveResources.size()); 257 return r; 258 } 259 } 260 261 final boolean applyConfigurationToResourcesLocked(Configuration config, 262 CompatibilityInfo compat) { 263 if (mResConfiguration == null) { 264 mResConfiguration = new Configuration(); 265 } 266 if (!mResConfiguration.isOtherSeqNewer(config) && compat == null) { 267 if (DEBUG || DEBUG_CONFIGURATION) Slog.v(TAG, "Skipping new config: curSeq=" 268 + mResConfiguration.seq + ", newSeq=" + config.seq); 269 return false; 270 } 271 int changes = mResConfiguration.updateFrom(config); 272 // Things might have changed in display manager, so clear the cached displays. 273 mDisplays.clear(); 274 DisplayMetrics defaultDisplayMetrics = getDisplayMetricsLocked(); 275 276 if (compat != null && (mResCompatibilityInfo == null || 277 !mResCompatibilityInfo.equals(compat))) { 278 mResCompatibilityInfo = compat; 279 changes |= ActivityInfo.CONFIG_SCREEN_LAYOUT 280 | ActivityInfo.CONFIG_SCREEN_SIZE 281 | ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE; 282 } 283 284 // set it for java, this also affects newly created Resources 285 if (config.locale != null) { 286 Locale.setDefault(config.locale); 287 } 288 289 Resources.updateSystemConfiguration(config, defaultDisplayMetrics, compat); 290 291 ApplicationPackageManager.configurationChanged(); 292 //Slog.i(TAG, "Configuration changed in " + currentPackageName()); 293 294 Configuration tmpConfig = null; 295 296 for (int i = mActiveResources.size() - 1; i >= 0; i--) { 297 ResourcesKey key = mActiveResources.keyAt(i); 298 Resources r = mActiveResources.valueAt(i).get(); 299 if (r != null) { 300 if (DEBUG || DEBUG_CONFIGURATION) Slog.v(TAG, "Changing resources " 301 + r + " config to: " + config); 302 int displayId = key.mDisplayId; 303 boolean isDefaultDisplay = (displayId == Display.DEFAULT_DISPLAY); 304 DisplayMetrics dm = defaultDisplayMetrics; 305 final boolean hasOverrideConfiguration = key.hasOverrideConfiguration(); 306 if (!isDefaultDisplay || hasOverrideConfiguration) { 307 if (tmpConfig == null) { 308 tmpConfig = new Configuration(); 309 } 310 tmpConfig.setTo(config); 311 if (!isDefaultDisplay) { 312 dm = getDisplayMetricsLocked(displayId); 313 applyNonDefaultDisplayMetricsToConfigurationLocked(dm, tmpConfig); 314 } 315 if (hasOverrideConfiguration) { 316 tmpConfig.updateFrom(key.mOverrideConfiguration); 317 } 318 r.updateConfiguration(tmpConfig, dm, compat); 319 } else { 320 r.updateConfiguration(config, dm, compat); 321 } 322 //Slog.i(TAG, "Updated app resources " + v.getKey() 323 // + " " + r + ": " + r.getConfiguration()); 324 } else { 325 //Slog.i(TAG, "Removing old resources " + v.getKey()); 326 mActiveResources.removeAt(i); 327 } 328 } 329 330 return changes != 0; 331 } 332 333 } 334
