/*
* 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.os.IBinder;
import android.util.ArrayMap;
import android.util.DisplayMetrics;
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";
static final boolean DEBUG_CACHE = false;
static final boolean DEBUG_STATS = true;
private static ResourcesManager sResourcesManager;
final ArrayMap<ResourcesKey, WeakReference<Resources> > mActiveResources
= new ArrayMap<ResourcesKey, WeakReference<Resources> >();
final ArrayMap<DisplayAdjustments, DisplayMetrics> mDefaultDisplayMetrics
= new ArrayMap<DisplayAdjustments, DisplayMetrics>();
CompatibilityInfo mResCompatibilityInfo;
Configuration mResConfiguration;
final Configuration mTmpConfig = new Configuration();
public static ResourcesManager getInstance() {
synchronized (ResourcesManager.class) {
if (sResourcesManager == null) {
sResourcesManager = new ResourcesManager();
}
return sResourcesManager;
}
}
public Configuration getConfiguration() {
return mResConfiguration;
}
public void flushDisplayMetricsLocked() {
mDefaultDisplayMetrics.clear();
}
public DisplayMetrics getDisplayMetricsLocked(int displayId) {
return getDisplayMetricsLocked(displayId, DisplayAdjustments.DEFAULT_DISPLAY_ADJUSTMENTS);
}
public DisplayMetrics getDisplayMetricsLocked(int displayId, DisplayAdjustments daj) {
boolean isDefaultDisplay = (displayId == Display.DEFAULT_DISPLAY);
DisplayMetrics dm = isDefaultDisplay ? mDefaultDisplayMetrics.get(daj) : null;
if (dm != null) {
return dm;
}
dm = new DisplayMetrics();
DisplayManagerGlobal displayManager = DisplayManagerGlobal.getInstance();
if (displayManager == null) {
// may be null early in system startup
dm.setToDefaults();
return dm;
}
if (isDefaultDisplay) {
mDefaultDisplayMetrics.put(daj, dm);
}
Display d = displayManager.getCompatibleDisplay(displayId, daj);
if (d != null) {
d.getMetrics(dm);
} else {
// Display no longer exists
// FIXME: This would not be a problem if we kept the Display object around
// instead of using the raw display id everywhere. The Display object caches
// its information even after the display has been removed.
dm.setToDefaults();
}
//Slog.i("foo", "New metrics: w=" + metrics.widthPixels + " h="
// + metrics.heightPixels + " den=" + metrics.density
// + " xdpi=" + metrics.xdpi + " ydpi=" + metrics.ydpi);
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;
}
/**
* Creates the top level Resources for applications with the given compatibility info.
*
* @param resDir the resource directory.
* @param overlayDirs the resource overlay directories.
* @param libDirs the shared library resource dirs this app references.
* @param compatInfo the compability info. Must not be null.
* @param token the application token for determining stack bounds.
*/
public Resources getTopLevelResources(String resDir, String[] splitResDirs,
String[] overlayDirs, String[] libDirs, int displayId,
Configuration overrideConfiguration, CompatibilityInfo compatInfo, IBinder token) {
final float scale = compatInfo.applicationScale;
ResourcesKey key = new ResourcesKey(resDir, displayId, overrideConfiguration, scale, token);
Resources r;
synchronized (this) {
// Resources is app scale dependent.
if (false) {
Slog.w(TAG, "getTopLevelResources: " + resDir + " / " + scale);
}
WeakReference<Resources> wr = mActiveResources.get(key);
r = wr != null ? wr.get() : null;
//if (r != null) Slog.i(TAG, "isUpToDate " + resDir + ": " + r.getAssets().isUpToDate());
if (r != null && r.getAssets().isUpToDate()) {
if (false) {
Slog.w(TAG, "Returning cached resources " + r + " " + resDir
+ ": appScale=" + r.getCompatibilityInfo().applicationScale);
}
return r;
}
}
//if (r != null) {
// Slog.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 (assets.addAssetPath(libDir) == 0) {
Slog.w(TAG, "Asset path '" + libDir +
"' does not exist or contains no resources.");
}
}
}
//Slog.i(TAG, "Resource: key=" + key + ", display metrics=" + metrics);
DisplayMetrics dm = getDisplayMetricsLocked(displayId);
Configuration config;
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);
}
} else {
config = getConfiguration();
}
r = new Resources(assets, dm, config, compatInfo, token);
if (false) {
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<Resources>(r));
return r;
}
}
public final boolean applyConfigurationToResourcesLocked(Configuration config,
CompatibilityInfo compat) {
if (mResConfiguration == null) {
mResConfiguration = new Configuration();
}
if (!mResConfiguration.isOtherSeqNewer(config) && compat == null) {
if (DEBUG_CONFIGURATION) Slog.v(TAG, "Skipping new config: curSeq="
+ mResConfiguration.seq + ", newSeq=" + config.seq);
return false;
}
int changes = mResConfiguration.updateFrom(config);
flushDisplayMetricsLocked();
DisplayMetrics defaultDisplayMetrics = getDisplayMetricsLocked(Display.DEFAULT_DISPLAY);
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_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;
}
}
|
