config.xml
<string translatable="false" name="config_ntpServer">time.android.com</string>
symbols.xml
com.android.internal.R.string
<java-symbol type="string" name="config_ntpServer" />
out/target/common/R/com/android/internal/R.java
package com.android.internal;
public final class R {
public static final class string {
public static final int config_ntpServer=0x01040054;
}
public.xml
android.R.color
<public type="color" name="white" id="0x0106000b" />
<public type="color" name="black" id="0x0106000c" />
out/target/common/R/android/R.java
package android;
public final class R {
public static final class color {
public static final int black=0x0106000c;
public static final int white=0x0106000b;
}
}
add config
- config.xml
- symbols.xml
- mmm frameworks/base/core/res/
- make update-api
App
context.getResources().getString(Resources.getSystem().getIdentifier("config_ntpServer", "string", "android"));
framework-res.apk
ResourcesManager
class ContextImpl extends Context {
private ContextImpl(ContextImpl container, ActivityThread mainThread,
LoadedApk packageInfo, IBinder activityToken, UserHandle user, int flags,
Display display, Configuration overrideConfiguration, int createDisplayWithId) {
mResourcesManager = ResourcesManager.getInstance();
---------------------------------------------------------------------------------
resources = mResourcesManager.createBaseActivityResources(
activityToken,
packageInfo.getResDir(),
packageInfo.getSplitResDirs(),
packageInfo.getOverlayDirs(),
packageInfo.getApplicationInfo().sharedLibraryFiles,
displayId,
overrideConfiguration,
compatInfo,
packageInfo.getClassLoader());
mResources = resources;
}
@Override
public AssetManager getAssets() {
return getResources().getAssets();
}
@Override
public Resources getResources() {
return mResources;
}
}
/** @hide */
public class ResourcesManager {
public @Nullable 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);
}
}
private @Nullable Resources getOrCreateResources(@Nullable IBinder activityToken,
@NonNull ResourcesKey key, @NonNull ClassLoader classLoader) {
----------------------------------------------------------------------------------
// If we're here, we didn't find a suitable ResourcesImpl to use, so create one now.
ResourcesImpl resourcesImpl = createResourcesImpl(key);
----------------------------------------------------------------------------------
}
private @Nullable ResourcesImpl createResourcesImpl(@NonNull ResourcesKey key) {
final DisplayAdjustments daj = new DisplayAdjustments(key.mOverrideConfiguration);
daj.setCompatibilityInfo(key.mCompatInfo);
final AssetManager assets = createAssetManager(key);
if (assets == null) {
return null;
}
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;
}
protected @Nullable 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) {
Log.e(TAG, "failed to add asset path " + key.mResDir);
return null;
}
}
if (key.mSplitResDirs != null) {
for (final String splitResDir : key.mSplitResDirs) {
if (assets.addAssetPath(splitResDir) == 0) {
Log.e(TAG, "failed to add split asset path " + splitResDir);
return null;
}
}
}
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;
}
}
