| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package android.app; |
| |
| import static android.app.ActivityThread.DEBUG_CONFIGURATION; |
| |
| import android.annotation.NonNull; |
| import android.annotation.Nullable; |
| import android.content.pm.ActivityInfo; |
| import android.content.res.AssetManager; |
| import android.content.res.CompatibilityInfo; |
| import android.content.res.Configuration; |
| import android.content.res.Resources; |
| import android.content.res.ResourcesImpl; |
| import android.content.res.ResourcesKey; |
| import android.hardware.display.DisplayManagerGlobal; |
| import android.os.IBinder; |
| import android.os.Trace; |
| import android.util.ArrayMap; |
| import android.util.DisplayMetrics; |
| import android.util.Log; |
| import android.util.Pair; |
| import android.util.Slog; |
| import android.view.Display; |
| import android.view.DisplayAdjustments; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| import com.android.internal.util.ArrayUtils; |
| |
| import java.lang.ref.WeakReference; |
| import java.util.ArrayList; |
| import java.util.Objects; |
| import java.util.WeakHashMap; |
| import java.util.function.Predicate; |
| |
| /** @hide */ |
| public class ResourcesManager { |
| static final String TAG = "ResourcesManager"; |
| private static final boolean DEBUG = false; |
| |
| private static ResourcesManager sResourcesManager; |
| |
| /** |
| * Predicate that returns true if a WeakReference is gc'ed. |
| */ |
| private static final Predicate<WeakReference<Resources>> sEmptyReferencePredicate = |
| new Predicate<WeakReference<Resources>>() { |
| @Override |
| public boolean test(WeakReference<Resources> weakRef) { |
| return weakRef == null || weakRef.get() == null; |
| } |
| }; |
| |
| /** |
| * The global compatibility settings. |
| */ |
| private CompatibilityInfo mResCompatibilityInfo; |
| |
| /** |
| * The global configuration upon which all Resources are based. Multi-window Resources |
| * apply their overrides to this configuration. |
| */ |
| private final Configuration mResConfiguration = new Configuration(); |
| |
| /** |
| * A mapping of ResourceImpls and their configurations. These are heavy weight objects |
| * which should be reused as much as possible. |
| */ |
| private final ArrayMap<ResourcesKey, WeakReference<ResourcesImpl>> mResourceImpls = |
| new ArrayMap<>(); |
| |
| /** |
| * A list of Resource references that can be reused. |
| */ |
| private final ArrayList<WeakReference<Resources>> mResourceReferences = new ArrayList<>(); |
| |
| /** |
| * Resources and base configuration override associated with an Activity. |
| */ |
| private static class ActivityResources { |
| public final Configuration overrideConfig = new Configuration(); |
| public final ArrayList<WeakReference<Resources>> activityResources = new ArrayList<>(); |
| } |
| |
| /** |
| * Each Activity may has a base override configuration that is applied to each Resources object, |
| * which in turn may have their own override configuration specified. |
| */ |
| private final WeakHashMap<IBinder, ActivityResources> mActivityResourceReferences = |
| new WeakHashMap<>(); |
| |
| /** |
| * A cache of DisplayId to DisplayAdjustments. |
| */ |
| private final ArrayMap<Pair<Integer, DisplayAdjustments>, WeakReference<Display>> mDisplays = |
| new ArrayMap<>(); |
| |
| public static ResourcesManager getInstance() { |
| synchronized (ResourcesManager.class) { |
| if (sResourcesManager == null) { |
| sResourcesManager = new ResourcesManager(); |
| } |
| return sResourcesManager; |
| } |
| } |
| |
| /** |
| * Invalidate and destroy any resources that reference content under the |
| * given filesystem path. Typically used when unmounting a storage device to |
| * try as hard as possible to release any open FDs. |
| */ |
| public void invalidatePath(String path) { |
| synchronized (this) { |
| int count = 0; |
| for (int i = 0; i < mResourceImpls.size();) { |
| final ResourcesKey key = mResourceImpls.keyAt(i); |
| if (key.isPathReferenced(path)) { |
| final ResourcesImpl res = mResourceImpls.removeAt(i).get(); |
| if (res != null) { |
| res.flushLayoutCache(); |
| } |
| count++; |
| } else { |
| i++; |
| } |
| } |
| Log.i(TAG, "Invalidated " + count + " asset managers that referenced " + path); |
| } |
| } |
| |
| public Configuration getConfiguration() { |
| synchronized (this) { |
| return mResConfiguration; |
| } |
| } |
| |
| DisplayMetrics getDisplayMetrics() { |
| return getDisplayMetrics(Display.DEFAULT_DISPLAY, |
| DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS); |
| } |
| |
| /** |
| * Protected so that tests can override and returns something a fixed value. |
| */ |
| @VisibleForTesting |
| protected @NonNull DisplayMetrics getDisplayMetrics(int displayId, DisplayAdjustments da) { |
| DisplayMetrics dm = new DisplayMetrics(); |
| final Display display = getAdjustedDisplay(displayId, da); |
| if (display != null) { |
| display.getMetrics(dm); |
| } else { |
| dm.setToDefaults(); |
| } |
| return dm; |
| } |
| |
| private static void applyNonDefaultDisplayMetricsToConfiguration( |
| @NonNull DisplayMetrics dm, @NonNull Configuration config) { |
| config.touchscreen = Configuration.TOUCHSCREEN_NOTOUCH; |
| config.densityDpi = dm.densityDpi; |
| config.screenWidthDp = (int) (dm.widthPixels / dm.density); |
| config.screenHeightDp = (int) (dm.heightPixels / dm.density); |
| int sl = Configuration.resetScreenLayout(config.screenLayout); |
| if (dm.widthPixels > dm.heightPixels) { |
| config.orientation = Configuration.ORIENTATION_LANDSCAPE; |
| config.screenLayout = Configuration.reduceScreenLayout(sl, |
| config.screenWidthDp, config.screenHeightDp); |
| } else { |
| config.orientation = Configuration.ORIENTATION_PORTRAIT; |
| config.screenLayout = Configuration.reduceScreenLayout(sl, |
| config.screenHeightDp, config.screenWidthDp); |
| } |
| config.smallestScreenWidthDp = config.screenWidthDp; // assume screen does not rotate |
| config.compatScreenWidthDp = config.screenWidthDp; |
| config.compatScreenHeightDp = config.screenHeightDp; |
| config.compatSmallestScreenWidthDp = config.smallestScreenWidthDp; |
| } |
| |
| public boolean applyCompatConfigurationLocked(int displayDensity, |
| @NonNull Configuration compatConfiguration) { |
| if (mResCompatibilityInfo != null && !mResCompatibilityInfo.supportsScreen()) { |
| mResCompatibilityInfo.applyToConfiguration(displayDensity, compatConfiguration); |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Returns an adjusted {@link Display} object based on the inputs or null if display isn't |
| * available. |
| * |
| * @param displayId display Id. |
| * @param displayAdjustments display adjustments. |
| */ |
| public Display getAdjustedDisplay(final int displayId, |
| @Nullable DisplayAdjustments displayAdjustments) { |
| final DisplayAdjustments displayAdjustmentsCopy = (displayAdjustments != null) |
| ? new DisplayAdjustments(displayAdjustments) : new DisplayAdjustments(); |
| final Pair<Integer, DisplayAdjustments> key = |
| Pair.create(displayId, displayAdjustmentsCopy); |
| synchronized (this) { |
| WeakReference<Display> wd = mDisplays.get(key); |
| if (wd != null) { |
| final Display display = wd.get(); |
| if (display != null) { |
| return display; |
| } |
| } |
| final DisplayManagerGlobal dm = DisplayManagerGlobal.getInstance(); |
| if (dm == null) { |
| // may be null early in system startup |
| return null; |
| } |
| final Display display = dm.getCompatibleDisplay(displayId, key.second); |
| if (display != null) { |
| mDisplays.put(key, new WeakReference<>(display)); |
| } |
| return display; |
| } |
| } |
| |
| /** |
| * Creates an AssetManager from the paths within the ResourcesKey. |
| * |
| * This can be overridden in tests so as to avoid creating a real AssetManager with |
| * real APK paths. |
| * @param key The key containing the resource paths to add to the AssetManager. |
| * @return a new AssetManager. |
| */ |
| @VisibleForTesting |
| protected @NonNull AssetManager createAssetManager(@NonNull final ResourcesKey key) { |
| AssetManager assets = new AssetManager(); |
| |
| // resDir can be null if the 'android' package is creating a new Resources object. |
| // This is fine, since each AssetManager automatically loads the 'android' package |
| // already. |
| if (key.mResDir != null) { |
| if (assets.addAssetPath(key.mResDir) == 0) { |
| throw new Resources.NotFoundException("failed to add asset path " + key.mResDir); |
| } |
| } |
| |
| if (key.mSplitResDirs != null) { |
| for (final String splitResDir : key.mSplitResDirs) { |
| if (assets.addAssetPath(splitResDir) == 0) { |
| throw new Resources.NotFoundException( |
| "failed to add split asset path " + splitResDir); |
| } |
| } |
| } |
| |
| if (key.mOverlayDirs != null) { |
| for (final String idmapPath : key.mOverlayDirs) { |
| assets.addOverlayPath(idmapPath); |
| } |
| } |
| |
| if (key.mLibDirs != null) { |
| for (final String libDir : key.mLibDirs) { |
| if (libDir.endsWith(".apk")) { |
| // Avoid opening files we know do not have resources, |
| // like code-only .jar files. |
| if (assets.addAssetPathAsSharedLibrary(libDir) == 0) { |
| Log.w(TAG, "Asset path '" + libDir + |
| "' does not exist or contains no resources."); |
| } |
| } |
| } |
| } |
| return assets; |
| } |
| |
| private Configuration generateConfig(@NonNull ResourcesKey key, @NonNull DisplayMetrics dm) { |
| Configuration config; |
| final boolean isDefaultDisplay = (key.mDisplayId == Display.DEFAULT_DISPLAY); |
| final boolean hasOverrideConfig = key.hasOverrideConfiguration(); |
| if (!isDefaultDisplay || hasOverrideConfig) { |
| config = new Configuration(getConfiguration()); |
| if (!isDefaultDisplay) { |
| applyNonDefaultDisplayMetricsToConfiguration(dm, config); |
| } |
| if (hasOverrideConfig) { |
| config.updateFrom(key.mOverrideConfiguration); |
| if (DEBUG) Slog.v(TAG, "Applied overrideConfig=" + key.mOverrideConfiguration); |
| } |
| } else { |
| config = getConfiguration(); |
| } |
| return config; |
| } |
| |
| private @NonNull ResourcesImpl createResourcesImpl(@NonNull ResourcesKey key) { |
| final DisplayAdjustments daj = new DisplayAdjustments(key.mOverrideConfiguration); |
| daj.setCompatibilityInfo(key.mCompatInfo); |
| |
| final AssetManager assets = createAssetManager(key); |
| final DisplayMetrics dm = getDisplayMetrics(key.mDisplayId, daj); |
| final Configuration config = generateConfig(key, dm); |
| final ResourcesImpl impl = new ResourcesImpl(assets, dm, config, daj); |
| if (DEBUG) { |
| Slog.d(TAG, "- creating impl=" + impl + " with key: " + key); |
| } |
| return impl; |
| } |
| |
| /** |
| * Finds a cached ResourcesImpl object that matches the given ResourcesKey. |
| * |
| * @param key The key to match. |
| * @return a ResourcesImpl if the key matches a cache entry, null otherwise. |
| */ |
| private ResourcesImpl findResourcesImplForKeyLocked(@NonNull ResourcesKey key) { |
| WeakReference<ResourcesImpl> weakImplRef = mResourceImpls.get(key); |
| ResourcesImpl impl = weakImplRef != null ? weakImplRef.get() : null; |
| if (impl != null && impl.getAssets().isUpToDate()) { |
| return impl; |
| } |
| return null; |
| } |
| |
| /** |
| * Finds a cached ResourcesImpl object that matches the given ResourcesKey, or |
| * creates a new one and caches it for future use. |
| * @param key The key to match. |
| * @return a ResourcesImpl object matching the key. |
| */ |
| private @NonNull ResourcesImpl findOrCreateResourcesImplForKeyLocked( |
| @NonNull ResourcesKey key) { |
| ResourcesImpl impl = findResourcesImplForKeyLocked(key); |
| if (impl == null) { |
| impl = createResourcesImpl(key); |
| mResourceImpls.put(key, new WeakReference<>(impl)); |
| } |
| return impl; |
| } |
| |
| /** |
| * Find the ResourcesKey that this ResourcesImpl object is associated with. |
| * @return the ResourcesKey or null if none was found. |
| */ |
| private ResourcesKey findKeyForResourceImplLocked(@NonNull ResourcesImpl resourceImpl) { |
| final int refCount = mResourceImpls.size(); |
| for (int i = 0; i < refCount; i++) { |
| WeakReference<ResourcesImpl> weakImplRef = mResourceImpls.valueAt(i); |
| ResourcesImpl impl = weakImplRef != null ? weakImplRef.get() : null; |
| if (impl != null && resourceImpl == impl) { |
| return mResourceImpls.keyAt(i); |
| } |
| } |
| return null; |
| } |
| |
| private ActivityResources getOrCreateActivityResourcesStructLocked( |
| @NonNull IBinder activityToken) { |
| ActivityResources activityResources = mActivityResourceReferences.get(activityToken); |
| if (activityResources == null) { |
| activityResources = new ActivityResources(); |
| mActivityResourceReferences.put(activityToken, activityResources); |
| } |
| return activityResources; |
| } |
| |
| /** |
| * Gets an existing Resources object tied to this Activity, or creates one if it doesn't exist |
| * or the class loader is different. |
| */ |
| private @NonNull Resources getOrCreateResourcesForActivityLocked(@NonNull IBinder activityToken, |
| @NonNull ClassLoader classLoader, @NonNull ResourcesImpl impl) { |
| final ActivityResources activityResources = getOrCreateActivityResourcesStructLocked( |
| activityToken); |
| |
| final int refCount = activityResources.activityResources.size(); |
| for (int i = 0; i < refCount; i++) { |
| WeakReference<Resources> weakResourceRef = activityResources.activityResources.get(i); |
| Resources resources = weakResourceRef.get(); |
| |
| if (resources != null |
| && Objects.equals(resources.getClassLoader(), classLoader) |
| && resources.getImpl() == impl) { |
| if (DEBUG) { |
| Slog.d(TAG, "- using existing ref=" + resources); |
| } |
| return resources; |
| } |
| } |
| |
| Resources resources = new Resources(classLoader); |
| resources.setImpl(impl); |
| activityResources.activityResources.add(new WeakReference<>(resources)); |
| if (DEBUG) { |
| Slog.d(TAG, "- creating new ref=" + resources); |
| Slog.d(TAG, "- setting ref=" + resources + " with impl=" + impl); |
| } |
| return resources; |
| } |
| |
| /** |
| * Gets an existing Resources object if the class loader and ResourcesImpl are the same, |
| * otherwise creates a new Resources object. |
| */ |
| private @NonNull Resources getOrCreateResourcesLocked(@NonNull ClassLoader classLoader, |
| @NonNull ResourcesImpl impl) { |
| // Find an existing Resources that has this ResourcesImpl set. |
| final int refCount = mResourceReferences.size(); |
| for (int i = 0; i < refCount; i++) { |
| WeakReference<Resources> weakResourceRef = mResourceReferences.get(i); |
| Resources resources = weakResourceRef.get(); |
| if (resources != null && |
| Objects.equals(resources.getClassLoader(), classLoader) && |
| resources.getImpl() == impl) { |
| if (DEBUG) { |
| Slog.d(TAG, "- using existing ref=" + resources); |
| } |
| return resources; |
| } |
| } |
| |
| // Create a new Resources reference and use the existing ResourcesImpl object. |
| Resources resources = new Resources(classLoader); |
| resources.setImpl(impl); |
| mResourceReferences.add(new WeakReference<>(resources)); |
| if (DEBUG) { |
| Slog.d(TAG, "- creating new ref=" + resources); |
| Slog.d(TAG, "- setting ref=" + resources + " with impl=" + impl); |
| } |
| return resources; |
| } |
| |
| /** |
| * Creates base resources for an Activity. Calls to |
| * {@link #getResources(IBinder, String, String[], String[], String[], int, Configuration, |
| * CompatibilityInfo, ClassLoader)} with the same activityToken will have their override |
| * configurations merged with the one specified here. |
| * |
| * @param activityToken Represents an Activity. |
| * @param resDir The base resource path. Can be null (only framework resources will be loaded). |
| * @param splitResDirs An array of split resource paths. Can be null. |
| * @param overlayDirs An array of overlay paths. Can be null. |
| * @param libDirs An array of resource library paths. Can be null. |
| * @param displayId The ID of the display for which to create the resources. |
| * @param overrideConfig The configuration to apply on top of the base configuration. Can be |
| * null. This provides the base override for this Activity. |
| * @param compatInfo The compatibility settings to use. Cannot be null. A default to use is |
| * {@link CompatibilityInfo#DEFAULT_COMPATIBILITY_INFO}. |
| * @param classLoader The class loader to use when inflating Resources. If null, the |
| * {@link ClassLoader#getSystemClassLoader()} is used. |
| * @return a Resources object from which to access resources. |
| */ |
| public @NonNull Resources createBaseActivityResources(@NonNull IBinder activityToken, |
| @Nullable String resDir, |
| @Nullable String[] splitResDirs, |
| @Nullable String[] overlayDirs, |
| @Nullable String[] libDirs, |
| int displayId, |
| @Nullable Configuration overrideConfig, |
| @NonNull CompatibilityInfo compatInfo, |
| @Nullable ClassLoader classLoader) { |
| try { |
| Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, |
| "ResourcesManager#createBaseActivityResources"); |
| final ResourcesKey key = new ResourcesKey( |
| resDir, |
| splitResDirs, |
| overlayDirs, |
| libDirs, |
| displayId, |
| overrideConfig != null ? new Configuration(overrideConfig) : null, // Copy |
| compatInfo); |
| classLoader = classLoader != null ? classLoader : ClassLoader.getSystemClassLoader(); |
| |
| if (DEBUG) { |
| Slog.d(TAG, "createBaseActivityResources activity=" + activityToken |
| + " with key=" + key); |
| } |
| |
| synchronized (this) { |
| // Force the creation of an ActivityResourcesStruct. |
| getOrCreateActivityResourcesStructLocked(activityToken); |
| } |
| |
| // Update any existing Activity Resources references. |
| updateResourcesForActivity(activityToken, overrideConfig); |
| |
| // Now request an actual Resources object. |
| return getOrCreateResources(activityToken, key, classLoader); |
| } finally { |
| Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); |
| } |
| } |
| |
| /** |
| * Gets an existing Resources object set with a ResourcesImpl object matching the given key, |
| * or creates one if it doesn't exist. |
| * |
| * @param activityToken The Activity this Resources object should be associated with. |
| * @param key The key describing the parameters of the ResourcesImpl object. |
| * @param classLoader The classloader to use for the Resources object. |
| * If null, {@link ClassLoader#getSystemClassLoader()} is used. |
| * @return A Resources object that gets updated when |
| * {@link #applyConfigurationToResourcesLocked(Configuration, CompatibilityInfo)} |
| * is called. |
| */ |
| private @NonNull Resources getOrCreateResources(@Nullable IBinder activityToken, |
| @NonNull ResourcesKey key, @NonNull ClassLoader classLoader) { |
| synchronized (this) { |
| if (DEBUG) { |
| Throwable here = new Throwable(); |
| here.fillInStackTrace(); |
| Slog.w(TAG, "!! Get resources for activity=" + activityToken + " key=" + key, here); |
| } |
| |
| if (activityToken != null) { |
| final ActivityResources activityResources = |
| getOrCreateActivityResourcesStructLocked(activityToken); |
| |
| // Clean up any dead references so they don't pile up. |
| ArrayUtils.unstableRemoveIf(activityResources.activityResources, |
| sEmptyReferencePredicate); |
| |
| // Rebase the key's override config on top of the Activity's base override. |
| if (key.hasOverrideConfiguration() |
| && !activityResources.overrideConfig.equals(Configuration.EMPTY)) { |
| final Configuration temp = new Configuration(activityResources.overrideConfig); |
| temp.updateFrom(key.mOverrideConfiguration); |
| key.mOverrideConfiguration.setTo(temp); |
| } |
| |
| ResourcesImpl resourcesImpl = findResourcesImplForKeyLocked(key); |
| if (resourcesImpl != null) { |
| if (DEBUG) { |
| Slog.d(TAG, "- using existing impl=" + resourcesImpl); |
| } |
| return getOrCreateResourcesForActivityLocked(activityToken, classLoader, |
| resourcesImpl); |
| } |
| |
| // We will create the ResourcesImpl object outside of holding this lock. |
| |
| } else { |
| // Clean up any dead references so they don't pile up. |
| ArrayUtils.unstableRemoveIf(mResourceReferences, sEmptyReferencePredicate); |
| |
| // Not tied to an Activity, find a shared Resources that has the right ResourcesImpl |
| ResourcesImpl resourcesImpl = findResourcesImplForKeyLocked(key); |
| if (resourcesImpl != null) { |
| if (DEBUG) { |
| Slog.d(TAG, "- using existing impl=" + resourcesImpl); |
| } |
| return getOrCreateResourcesLocked(classLoader, resourcesImpl); |
| } |
| |
| // We will create the ResourcesImpl object outside of holding this lock. |
| } |
| } |
| |
| // If we're here, we didn't find a suitable ResourcesImpl to use, so create one now. |
| ResourcesImpl resourcesImpl = createResourcesImpl(key); |
| |
| synchronized (this) { |
| ResourcesImpl existingResourcesImpl = findResourcesImplForKeyLocked(key); |
| if (existingResourcesImpl != null) { |
| if (DEBUG) { |
| Slog.d(TAG, "- got beat! existing impl=" + existingResourcesImpl |
| + " new impl=" + resourcesImpl); |
| } |
| resourcesImpl.getAssets().close(); |
| resourcesImpl = existingResourcesImpl; |
| } else { |
| // Add this ResourcesImpl to the cache. |
| mResourceImpls.put(key, new WeakReference<>(resourcesImpl)); |
| } |
| |
| final Resources resources; |
| if (activityToken != null) { |
| resources = getOrCreateResourcesForActivityLocked(activityToken, classLoader, |
| resourcesImpl); |
| } else { |
| resources = getOrCreateResourcesLocked(classLoader, resourcesImpl); |
| } |
| return resources; |
| } |
| } |
| |
| /** |
| * Gets or creates a new Resources object associated with the IBinder token. References returned |
| * by this method live as long as the Activity, meaning they can be cached and used by the |
| * Activity even after a configuration change. If any other parameter is changed |
| * (resDir, splitResDirs, overrideConfig) for a given Activity, the same Resources object |
| * is updated and handed back to the caller. However, changing the class loader will result in a |
| * new Resources object. |
| * <p/> |
| * If activityToken is null, a cached Resources object will be returned if it matches the |
| * input parameters. Otherwise a new Resources object that satisfies these parameters is |
| * returned. |
| * |
| * @param activityToken Represents an Activity. If null, global resources are assumed. |
| * @param resDir The base resource path. Can be null (only framework resources will be loaded). |
| * @param splitResDirs An array of split resource paths. Can be null. |
| * @param overlayDirs An array of overlay paths. Can be null. |
| * @param libDirs An array of resource library paths. Can be null. |
| * @param displayId The ID of the display for which to create the resources. |
| * @param overrideConfig The configuration to apply on top of the base configuration. Can be |
| * null. Mostly used with Activities that are in multi-window which may override width and |
| * height properties from the base config. |
| * @param compatInfo The compatibility settings to use. Cannot be null. A default to use is |
| * {@link CompatibilityInfo#DEFAULT_COMPATIBILITY_INFO}. |
| * @param classLoader The class loader to use when inflating Resources. If null, the |
| * {@link ClassLoader#getSystemClassLoader()} is used. |
| * @return a Resources object from which to access resources. |
| */ |
| public @NonNull Resources getResources(@Nullable IBinder activityToken, |
| @Nullable String resDir, |
| @Nullable String[] splitResDirs, |
| @Nullable String[] overlayDirs, |
| @Nullable String[] libDirs, |
| int displayId, |
| @Nullable Configuration overrideConfig, |
| @NonNull CompatibilityInfo compatInfo, |
| @Nullable ClassLoader classLoader) { |
| try { |
| Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, "ResourcesManager#getResources"); |
| final ResourcesKey key = new ResourcesKey( |
| resDir, |
| splitResDirs, |
| overlayDirs, |
| libDirs, |
| displayId, |
| overrideConfig != null ? new Configuration(overrideConfig) : null, // Copy |
| compatInfo); |
| classLoader = classLoader != null ? classLoader : ClassLoader.getSystemClassLoader(); |
| return getOrCreateResources(activityToken, key, classLoader); |
| } finally { |
| Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); |
| } |
| } |
| |
| /** |
| * Updates an Activity's Resources object with overrideConfig. The Resources object |
| * that was previously returned by |
| * {@link #getResources(IBinder, String, String[], String[], String[], int, Configuration, |
| * CompatibilityInfo, ClassLoader)} is |
| * still valid and will have the updated configuration. |
| * @param activityToken The Activity token. |
| * @param overrideConfig The configuration override to update. |
| */ |
| public void updateResourcesForActivity(@NonNull IBinder activityToken, |
| @Nullable Configuration overrideConfig) { |
| try { |
| Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, |
| "ResourcesManager#updateResourcesForActivity"); |
| synchronized (this) { |
| final ActivityResources activityResources = |
| getOrCreateActivityResourcesStructLocked(activityToken); |
| |
| if (Objects.equals(activityResources.overrideConfig, overrideConfig)) { |
| // They are the same, no work to do. |
| return; |
| } |
| |
| // Grab a copy of the old configuration so we can create the delta's of each |
| // Resources object associated with this Activity. |
| final Configuration oldConfig = new Configuration(activityResources.overrideConfig); |
| |
| // Update the Activity's base override. |
| if (overrideConfig != null) { |
| activityResources.overrideConfig.setTo(overrideConfig); |
| } else { |
| activityResources.overrideConfig.setToDefaults(); |
| } |
| |
| if (DEBUG) { |
| Throwable here = new Throwable(); |
| here.fillInStackTrace(); |
| Slog.d(TAG, "updating resources override for activity=" + activityToken |
| + " from oldConfig=" |
| + Configuration.resourceQualifierString(oldConfig) |
| + " to newConfig=" |
| + Configuration.resourceQualifierString( |
| activityResources.overrideConfig), |
| here); |
| } |
| |
| final boolean activityHasOverrideConfig = |
| !activityResources.overrideConfig.equals(Configuration.EMPTY); |
| |
| // Rebase each Resources associated with this Activity. |
| final int refCount = activityResources.activityResources.size(); |
| for (int i = 0; i < refCount; i++) { |
| WeakReference<Resources> weakResRef = activityResources.activityResources.get( |
| i); |
| Resources resources = weakResRef.get(); |
| if (resources == null) { |
| continue; |
| } |
| |
| // Extract the ResourcesKey that was last used to create the Resources for this |
| // activity. |
| final ResourcesKey oldKey = findKeyForResourceImplLocked(resources.getImpl()); |
| if (oldKey == null) { |
| Slog.e(TAG, "can't find ResourcesKey for resources impl=" |
| + resources.getImpl()); |
| continue; |
| } |
| |
| // Build the new override configuration for this ResourcesKey. |
| final Configuration rebasedOverrideConfig = new Configuration(); |
| if (overrideConfig != null) { |
| rebasedOverrideConfig.setTo(overrideConfig); |
| } |
| |
| if (activityHasOverrideConfig && oldKey.hasOverrideConfiguration()) { |
| // Generate a delta between the old base Activity override configuration and |
| // the actual final override configuration that was used to figure out the |
| // real delta this Resources object wanted. |
| Configuration overrideOverrideConfig = Configuration.generateDelta( |
| oldConfig, oldKey.mOverrideConfiguration); |
| rebasedOverrideConfig.updateFrom(overrideOverrideConfig); |
| } |
| |
| // Create the new ResourcesKey with the rebased override config. |
| final ResourcesKey newKey = new ResourcesKey(oldKey.mResDir, |
| oldKey.mSplitResDirs, |
| oldKey.mOverlayDirs, oldKey.mLibDirs, oldKey.mDisplayId, |
| rebasedOverrideConfig, oldKey.mCompatInfo); |
| |
| if (DEBUG) { |
| Slog.d(TAG, "rebasing ref=" + resources + " from oldKey=" + oldKey |
| + " to newKey=" + newKey); |
| } |
| |
| ResourcesImpl resourcesImpl = findResourcesImplForKeyLocked(newKey); |
| if (resourcesImpl == null) { |
| resourcesImpl = createResourcesImpl(newKey); |
| mResourceImpls.put(newKey, new WeakReference<>(resourcesImpl)); |
| } |
| |
| if (resourcesImpl != resources.getImpl()) { |
| // Set the ResourcesImpl, updating it for all users of this Resources |
| // object. |
| resources.setImpl(resourcesImpl); |
| } |
| } |
| } |
| } finally { |
| Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); |
| } |
| } |
| |
| public final boolean applyConfigurationToResourcesLocked(@NonNull Configuration config, |
| @Nullable CompatibilityInfo compat) { |
| try { |
| Trace.traceBegin(Trace.TRACE_TAG_RESOURCES, |
| "ResourcesManager#applyConfigurationToResourcesLocked"); |
| |
| if (!mResConfiguration.isOtherSeqNewer(config) && compat == null) { |
| if (DEBUG || DEBUG_CONFIGURATION) Slog.v(TAG, "Skipping new config: curSeq=" |
| + mResConfiguration.seq + ", newSeq=" + config.seq); |
| return false; |
| } |
| int changes = mResConfiguration.updateFrom(config); |
| // Things might have changed in display manager, so clear the cached displays. |
| mDisplays.clear(); |
| DisplayMetrics defaultDisplayMetrics = getDisplayMetrics(); |
| |
| if (compat != null && (mResCompatibilityInfo == null || |
| !mResCompatibilityInfo.equals(compat))) { |
| mResCompatibilityInfo = compat; |
| changes |= ActivityInfo.CONFIG_SCREEN_LAYOUT |
| | ActivityInfo.CONFIG_SCREEN_SIZE |
| | ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE; |
| } |
| |
| Resources.updateSystemConfiguration(config, defaultDisplayMetrics, compat); |
| |
| ApplicationPackageManager.configurationChanged(); |
| //Slog.i(TAG, "Configuration changed in " + currentPackageName()); |
| |
| Configuration tmpConfig = null; |
| |
| for (int i = mResourceImpls.size() - 1; i >= 0; i--) { |
| ResourcesKey key = mResourceImpls.keyAt(i); |
| ResourcesImpl r = mResourceImpls.valueAt(i).get(); |
| if (r != null) { |
| if (DEBUG || DEBUG_CONFIGURATION) Slog.v(TAG, "Changing resources " |
| + r + " config to: " + config); |
| int displayId = key.mDisplayId; |
| boolean isDefaultDisplay = (displayId == Display.DEFAULT_DISPLAY); |
| DisplayMetrics dm = defaultDisplayMetrics; |
| final boolean hasOverrideConfiguration = key.hasOverrideConfiguration(); |
| if (!isDefaultDisplay || hasOverrideConfiguration) { |
| if (tmpConfig == null) { |
| tmpConfig = new Configuration(); |
| } |
| tmpConfig.setTo(config); |
| if (!isDefaultDisplay) { |
| // Get new DisplayMetrics based on the DisplayAdjustments given |
| // to the ResourcesImpl. Udate a copy if the CompatibilityInfo |
| // changed, because the ResourcesImpl object will handle the |
| // update internally. |
| DisplayAdjustments daj = r.getDisplayAdjustments(); |
| if (compat != null) { |
| daj = new DisplayAdjustments(daj); |
| daj.setCompatibilityInfo(compat); |
| } |
| dm = getDisplayMetrics(displayId, daj); |
| applyNonDefaultDisplayMetricsToConfiguration(dm, tmpConfig); |
| } |
| if (hasOverrideConfiguration) { |
| tmpConfig.updateFrom(key.mOverrideConfiguration); |
| } |
| r.updateConfiguration(tmpConfig, dm, compat); |
| } else { |
| r.updateConfiguration(config, dm, compat); |
| } |
| //Slog.i(TAG, "Updated app resources " + v.getKey() |
| // + " " + r + ": " + r.getConfiguration()); |
| } else { |
| //Slog.i(TAG, "Removing old resources " + v.getKey()); |
| mResourceImpls.removeAt(i); |
| } |
| } |
| |
| return changes != 0; |
| } finally { |
| Trace.traceEnd(Trace.TRACE_TAG_RESOURCES); |
| } |
| } |
| |
| /** |
| * Appends the library asset path to any ResourcesImpl object that contains the main |
| * assetPath. |
| * @param assetPath The main asset path for which to add the library asset path. |
| * @param libAsset The library asset path to add. |
| */ |
| public void appendLibAssetForMainAssetPath(String assetPath, String libAsset) { |
| synchronized (this) { |
| // Record which ResourcesImpl need updating |
| // (and what ResourcesKey they should update to). |
| final ArrayMap<ResourcesImpl, ResourcesKey> updatedResourceKeys = new ArrayMap<>(); |
| |
| final int implCount = mResourceImpls.size(); |
| for (int i = 0; i < implCount; i++) { |
| final ResourcesImpl impl = mResourceImpls.valueAt(i).get(); |
| final ResourcesKey key = mResourceImpls.keyAt(i); |
| if (impl != null && key.mResDir.equals(assetPath)) { |
| if (!ArrayUtils.contains(key.mLibDirs, libAsset)) { |
| final int newLibAssetCount = 1 + |
| (key.mLibDirs != null ? key.mLibDirs.length : 0); |
| final String[] newLibAssets = new String[newLibAssetCount]; |
| if (key.mLibDirs != null) { |
| System.arraycopy(key.mLibDirs, 0, newLibAssets, 0, key.mLibDirs.length); |
| } |
| newLibAssets[newLibAssetCount - 1] = libAsset; |
| |
| updatedResourceKeys.put(impl, new ResourcesKey( |
| key.mResDir, |
| key.mSplitResDirs, |
| key.mOverlayDirs, |
| newLibAssets, |
| key.mDisplayId, |
| key.mOverrideConfiguration, |
| key.mCompatInfo)); |
| } |
| } |
| } |
| |
| // Bail early if there is no work to do. |
| if (updatedResourceKeys.isEmpty()) { |
| return; |
| } |
| |
| // Update any references to ResourcesImpl that require reloading. |
| final int resourcesCount = mResourceReferences.size(); |
| for (int i = 0; i < resourcesCount; i++) { |
| final Resources r = mResourceReferences.get(i).get(); |
| if (r != null) { |
| final ResourcesKey key = updatedResourceKeys.get(r.getImpl()); |
| if (key != null) { |
| r.setImpl(findOrCreateResourcesImplForKeyLocked(key)); |
| } |
| } |
| } |
| |
| // Update any references to ResourcesImpl that require reloading for each Activity. |
| for (ActivityResources activityResources : mActivityResourceReferences.values()) { |
| final int resCount = activityResources.activityResources.size(); |
| for (int i = 0; i < resCount; i++) { |
| final Resources r = activityResources.activityResources.get(i).get(); |
| if (r != null) { |
| final ResourcesKey key = updatedResourceKeys.get(r.getImpl()); |
| if (key != null) { |
| r.setImpl(findOrCreateResourcesImplForKeyLocked(key)); |
| } |
| } |
| } |
| } |
| } |
| } |
| } |
