/*
* 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.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.ResourcesKey;
import android.hardware.display.DisplayManagerGlobal;
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 java.lang.ref.WeakReference;
import java.util.Locale;
/** @hide */
public class ResourcesManager {
static final String TAG = "ResourcesManager";
private static final boolean DEBUG = false;
private static ResourcesManager sResourcesManager;
private final ArrayMap<ResourcesKey, WeakReference<Resources> > mActiveResources =
new ArrayMap<>();
private final ArrayMap<Pair<Integer, DisplayAdjustments>, WeakReference<Display>> mDisplays =
new ArrayMap<>();
CompatibilityInfo mResCompatibilityInfo;
Configuration mResConfiguration;
public static ResourcesManager getInstance() {
synchronized (ResourcesManager.class) {
if (sResourcesManager == null) {
sResourcesManager = new ResourcesManager();
}
return sResourcesManager;
}
}
public Configuration getConfiguration() {
return mResConfiguration;
}
DisplayMetrics getDisplayMetricsLocked() {
return getDisplayMetricsLocked(Display.DEFAULT_DISPLAY);
}
DisplayMetrics getDisplayMetricsLocked(int displayId) {
DisplayMetrics dm = new DisplayMetrics();
final Display display =
getAdjustedDisplay(displayId, DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS);
if (display != null) {
display.getMetrics(dm);
} else {
dm.setToDefaults();
}
return dm;
}
final void applyNonDefaultDisplayMetricsToConfigurationLocked(
DisplayMetrics dm, 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 applyCompatConfiguration(int displayDensity,
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, 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 the top level Resources for applications with the given compatibility info.
*
* @param resDir the resource directory.
* @param splitResDirs split resource directories.
* @param overlayDirs the resource overlay directories.
* @param libDirs the shared library resource dirs this app references.
* @param displayId display Id.
* @param overrideConfiguration override configurations.
* @param compatInfo the compatibility info. Must not be null.
*/
Resources getTopLevelResources(String resDir, String[] splitResDirs,
String[] overlayDirs, String[] libDirs, int displayId,
Configuration overrideConfiguration, CompatibilityInfo compatInfo) {
final float scale = compatInfo.applicationScale;
Configuration overrideConfigCopy = (overrideConfiguration != null)
? new Configuration(overrideConfiguration) : null;
ResourcesKey key = new ResourcesKey(resDir, displayId, overrideConfigCopy, scale);
Resources r;
synchronized (this) {
// Resources is app scale dependent.
if (DEBUG) Slog.w(TAG, "getTopLevelResources: " + resDir + " / " + scale);
WeakReference<Resources> wr = mActiveResources.get(key);
r = wr != null ? wr.get() : null;
//if (r != null) Log.i(TAG, "isUpToDate " + resDir + ": " + r.getAssets().isUpToDate());
if (r != null && r.getAssets().isUpToDate()) {
if (DEBUG) Slog.w(TAG, "Returning cached resources " + r + " " + resDir
+ ": appScale=" + r.getCompatibilityInfo().applicationScale
+ " key=" + key + " overrideConfig=" + overrideConfiguration);
return r;
}
}
//if (r != null) {
// Log.w(TAG, "Throwing away out-of-date resources!!!! "
// + r + " " + resDir);
//}
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 (resDir != null) {
if (assets.addAssetPath(resDir) == 0) {
return null;
}
}
if (splitResDirs != null) {
for (String splitResDir : splitResDirs) {
if (assets.addAssetPath(splitResDir) == 0) {
return null;
}
}
}
if (overlayDirs != null) {
for (String idmapPath : overlayDirs) {
assets.addOverlayPath(idmapPath);
}
}
if (libDirs != null) {
for (String libDir : libDirs) {
if (libDir.endsWith(".apk")) {
// Avoid opening files we know do not have resources,
// like code-only .jar files.
if (assets.addAssetPath(libDir) == 0) {
Log.w(TAG, "Asset path '" + libDir +
"' does not exist or contains no resources.");
}
}
}
}
//Log.i(TAG, "Resource: key=" + key + ", display metrics=" + metrics);
DisplayMetrics dm = getDisplayMetricsLocked(displayId);
Configuration config;
final boolean isDefaultDisplay = (displayId == Display.DEFAULT_DISPLAY);
final boolean hasOverrideConfig = key.hasOverrideConfiguration();
if (!isDefaultDisplay || hasOverrideConfig) {
config = new Configuration(getConfiguration());
if (!isDefaultDisplay) {
applyNonDefaultDisplayMetricsToConfigurationLocked(dm, config);
}
if (hasOverrideConfig) {
config.updateFrom(key.mOverrideConfiguration);
if (DEBUG) Slog.v(TAG, "Applied overrideConfig=" + key.mOverrideConfiguration);
}
} else {
config = getConfiguration();
}
r = new Resources(assets, dm, config, compatInfo);
if (DEBUG) Slog.i(TAG, "Created app resources " + resDir + " " + r + ": "
+ r.getConfiguration() + " appScale=" + r.getCompatibilityInfo().applicationScale);
synchronized (this) {
WeakReference<Resources> wr = mActiveResources.get(key);
Resources existing = wr != null ? wr.get() : null;
if (existing != null && existing.getAssets().isUpToDate()) {
// Someone else already created the resources while we were
// unlocked; go ahead and use theirs.
r.getAssets().close();
return existing;
}
// XXX need to remove entries when weak references go away
mActiveResources.put(key, new WeakReference<>(r));
if (DEBUG) Slog.v(TAG, "mActiveResources.size()=" + mActiveResources.size());
return r;
}
}
final boolean applyConfigurationToResourcesLocked(Configuration config,
CompatibilityInfo compat) {
if (mResConfiguration == null) {
mResConfiguration = new Configuration();
}
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 = getDisplayMetricsLocked();
if (compat != null && (mResCompatibilityInfo == null ||
!mResCompatibilityInfo.equals(compat))) {
mResCompatibilityInfo = compat;
changes |= ActivityInfo.CONFIG_SCREEN_LAYOUT
| ActivityInfo.CONFIG_SCREEN_SIZE
| ActivityInfo.CONFIG_SMALLEST_SCREEN_SIZE;
}
// set it for java, this also affects newly created Resources
if (config.locale != null) {
Locale.setDefault(config.locale);
}
Resources.updateSystemConfiguration(config, defaultDisplayMetrics, compat);
ApplicationPackageManager.configurationChanged();
//Slog.i(TAG, "Configuration changed in " + currentPackageName());
Configuration tmpConfig = null;
for (int i = mActiveResources.size() - 1; i >= 0; i--) {
ResourcesKey key = mActiveResources.keyAt(i);
Resources r = mActiveResources.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) {
dm = getDisplayMetricsLocked(displayId);
applyNonDefaultDisplayMetricsToConfigurationLocked(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());
mActiveResources.removeAt(i);
}
}
return changes != 0;
}
}