/
MonkeyPatcher.java
executable file
·427 lines (405 loc) · 14 KB
/
MonkeyPatcher.java
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package com.android.tools.fd.runtime;
import java.lang.ref.WeakReference;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.Application;
import android.content.Context;
import android.content.res.AssetManager;
import android.content.res.Resources;
import android.os.Build;
import android.util.ArrayMap;
import android.util.Log;
import android.util.LongSparseArray;
import android.util.SparseArray;
import android.view.ContextThemeWrapper;
@SuppressLint("NewApi")
public class MonkeyPatcher {
/**
* 用realApplication替换原有的application
* @param context
* @param bootstrap
* @param realApplication
* @param externalResourceFile
*/
public static void monkeyPatchApplication(Context context,
Application bootstrap, Application realApplication,
String externalResourceFile) {
try {
Class<?> activityThread = Class
.forName("android.app.ActivityThread");
Object currentActivityThread = getActivityThread(context,
activityThread);
Field mInitialApplication = activityThread
.getDeclaredField("mInitialApplication");
mInitialApplication.setAccessible(true);
Application initialApplication = (Application) mInitialApplication
.get(currentActivityThread);
if ((realApplication != null) && (initialApplication == bootstrap)) {
mInitialApplication.set(currentActivityThread, realApplication);
}
if (realApplication != null) {
Field mAllApplications = activityThread
.getDeclaredField("mAllApplications");
mAllApplications.setAccessible(true);
List<Application> allApplications = (List<Application>) mAllApplications
.get(currentActivityThread);
for (int i = 0; i < allApplications.size(); i++) {
if (allApplications.get(i) == bootstrap) {
allApplications.set(i, realApplication);
}
}
}
Class<?> loadedApkClass;
try {
loadedApkClass = Class.forName("android.app.LoadedApk");
} catch (ClassNotFoundException e) {
loadedApkClass = Class
.forName("android.app.ActivityThread$PackageInfo");
}
Field mApplication = loadedApkClass
.getDeclaredField("mApplication");
mApplication.setAccessible(true);
Field mResDir = loadedApkClass.getDeclaredField("mResDir");
mResDir.setAccessible(true);
Field mLoadedApk = null;
try {
mLoadedApk = Application.class.getDeclaredField("mLoadedApk");
} catch (NoSuchFieldException e) {
}
for (String fieldName : new String[] { "mPackages",
"mResourcePackages" }) {
Field field = activityThread.getDeclaredField(fieldName);
field.setAccessible(true);
Object value = field.get(currentActivityThread);
for (Map.Entry<String, WeakReference<?>> entry : ((Map<String, WeakReference<?>>) value)
.entrySet()) {
Object loadedApk = ((WeakReference) entry.getValue()).get();
if (loadedApk != null) {
if (mApplication.get(loadedApk) == bootstrap) {
if (realApplication != null) {
mApplication.set(loadedApk, realApplication);
}
if (externalResourceFile != null) {
mResDir.set(loadedApk, externalResourceFile);
}
if ((realApplication != null)
&& (mLoadedApk != null)) {
mLoadedApk.set(realApplication, loadedApk);
}
}
}
}
}
} catch (Throwable e) {
throw new IllegalStateException(e);
}
}
/**
* 获取当前的ActivityThread对象
*
* @param context
* @param activityThread
* @return
*/
public static Object getActivityThread(Context context,
Class<?> activityThread) {
try {
if (activityThread == null) {
activityThread = Class.forName("android.app.ActivityThread");
}
Method m = activityThread.getMethod("currentActivityThread",
new Class[0]);
m.setAccessible(true);
Object currentActivityThread = m.invoke(activityThread,
new Object[0]);
Object apk = null;
Field mActivityThreadField = null;
if ((currentActivityThread == null) && (context != null)) {
Field mLoadedApk = context.getClass().getField("mLoadedApk");
mLoadedApk.setAccessible(true);
apk = mLoadedApk.get(context);
mActivityThreadField = apk.getClass().getDeclaredField(
"mActivityThread");
mActivityThreadField.setAccessible(true);
}
return mActivityThreadField.get(apk);
} catch (Throwable ignore) {
}
return null;
}
public static void monkeyPatchExistingResources(Context context,
String externalResourceFile, Collection<Activity> activities) {
if (externalResourceFile == null) {
return;
}
try {
AssetManager newAssetManager = (AssetManager) AssetManager.class
.getConstructor(new Class[0]).newInstance(new Object[0]);
Method mAddAssetPath = AssetManager.class.getDeclaredMethod(
"addAssetPath", new Class[] { String.class });
mAddAssetPath.setAccessible(true);
if (((Integer) mAddAssetPath.invoke(newAssetManager,
new Object[] { externalResourceFile })).intValue() == 0) {
throw new IllegalStateException(
"Could not create new AssetManager");
}
Method mEnsureStringBlocks = AssetManager.class.getDeclaredMethod(
"ensureStringBlocks", new Class[0]);
mEnsureStringBlocks.setAccessible(true);
mEnsureStringBlocks.invoke(newAssetManager, new Object[0]);
if (activities != null) {
for (Activity activity : activities) {
Resources resources = activity.getResources();
try {
Field mAssets = Resources.class
.getDeclaredField("mAssets");
mAssets.setAccessible(true);
mAssets.set(resources, newAssetManager);
} catch (Throwable ignore) {
Field mResourcesImpl = Resources.class
.getDeclaredField("mResourcesImpl");
mResourcesImpl.setAccessible(true);
Object resourceImpl = mResourcesImpl.get(resources);
Field implAssets = resourceImpl.getClass()
.getDeclaredField("mAssets");
implAssets.setAccessible(true);
implAssets.set(resourceImpl, newAssetManager);
}
Resources.Theme theme = activity.getTheme();
try {
try {
Field ma = Resources.Theme.class
.getDeclaredField("mAssets");
ma.setAccessible(true);
ma.set(theme, newAssetManager);
} catch (NoSuchFieldException ignore) {
Field themeField = Resources.Theme.class
.getDeclaredField("mThemeImpl");
themeField.setAccessible(true);
Object impl = themeField.get(theme);
Field ma = impl.getClass().getDeclaredField(
"mAssets");
ma.setAccessible(true);
ma.set(impl, newAssetManager);
}
Field mt = ContextThemeWrapper.class
.getDeclaredField("mTheme");
mt.setAccessible(true);
mt.set(activity, null);
Method mtm = ContextThemeWrapper.class
.getDeclaredMethod("initializeTheme",
new Class[0]);
mtm.setAccessible(true);
mtm.invoke(activity, new Object[0]);
Method mCreateTheme = AssetManager.class
.getDeclaredMethod("createTheme", new Class[0]);
mCreateTheme.setAccessible(true);
Object internalTheme = mCreateTheme.invoke(
newAssetManager, new Object[0]);
Field mTheme = Resources.Theme.class
.getDeclaredField("mTheme");
mTheme.setAccessible(true);
mTheme.set(theme, internalTheme);
} catch (Throwable e) {
Log.e("InstantRun",
"Failed to update existing theme for activity "
+ activity, e);
}
pruneResourceCaches(resources);
}
}
Collection<WeakReference<Resources>> references;
if (Build.VERSION.SDK_INT >= 19) {
Class<?> resourcesManagerClass = Class
.forName("android.app.ResourcesManager");
Method mGetInstance = resourcesManagerClass.getDeclaredMethod(
"getInstance", new Class[0]);
mGetInstance.setAccessible(true);
Object resourcesManager = mGetInstance.invoke(null,
new Object[0]);
try {
Field fMActiveResources = resourcesManagerClass
.getDeclaredField("mActiveResources");
fMActiveResources.setAccessible(true);
ArrayMap<?, WeakReference<Resources>> arrayMap = (ArrayMap) fMActiveResources
.get(resourcesManager);
references = arrayMap.values();
} catch (NoSuchFieldException ignore) {
Field mResourceReferences = resourcesManagerClass
.getDeclaredField("mResourceReferences");
mResourceReferences.setAccessible(true);
references = (Collection) mResourceReferences
.get(resourcesManager);
}
} else {
Class<?> activityThread = Class
.forName("android.app.ActivityThread");
Field fMActiveResources = activityThread
.getDeclaredField("mActiveResources");
fMActiveResources.setAccessible(true);
Object thread = getActivityThread(context, activityThread);
HashMap<?, WeakReference<Resources>> map = (HashMap) fMActiveResources
.get(thread);
references = map.values();
}
for (WeakReference<Resources> wr : references) {
Resources resources = (Resources) wr.get();
if (resources != null) {
try {
Field mAssets = Resources.class
.getDeclaredField("mAssets");
mAssets.setAccessible(true);
mAssets.set(resources, newAssetManager);
} catch (Throwable ignore) {
Field mResourcesImpl = Resources.class
.getDeclaredField("mResourcesImpl");
mResourcesImpl.setAccessible(true);
Object resourceImpl = mResourcesImpl.get(resources);
Field implAssets = resourceImpl.getClass()
.getDeclaredField("mAssets");
implAssets.setAccessible(true);
implAssets.set(resourceImpl, newAssetManager);
}
resources.updateConfiguration(resources.getConfiguration(),
resources.getDisplayMetrics());
}
}
} catch (Throwable e) {
throw new IllegalStateException(e);
}
}
private static void pruneResourceCaches(Object resources) {
if (Build.VERSION.SDK_INT >= 21) {
try {
Field typedArrayPoolField = Resources.class
.getDeclaredField("mTypedArrayPool");
typedArrayPoolField.setAccessible(true);
Object pool = typedArrayPoolField.get(resources);
Class<?> poolClass = pool.getClass();
Method acquireMethod = poolClass.getDeclaredMethod("acquire",
new Class[0]);
acquireMethod.setAccessible(true);
for (;;) {
Object typedArray = acquireMethod.invoke(pool,
new Object[0]);
if (typedArray == null) {
break;
}
}
} catch (Throwable ignore) {
}
}
if (Build.VERSION.SDK_INT >= 23) {
try {
Field mResourcesImpl = Resources.class
.getDeclaredField("mResourcesImpl");
mResourcesImpl.setAccessible(true);
resources = mResourcesImpl.get(resources);
} catch (Throwable ignore) {
}
}
Object lock = null;
if (Build.VERSION.SDK_INT >= 18) {
try {
Field field = resources.getClass().getDeclaredField(
"mAccessLock");
field.setAccessible(true);
lock = field.get(resources);
} catch (Throwable ignore) {
}
} else {
try {
Field field = Resources.class.getDeclaredField("mTmpValue");
field.setAccessible(true);
lock = field.get(resources);
} catch (Throwable ignore) {
}
}
if (lock == null) {
lock = MonkeyPatcher.class;
}
synchronized (lock) {
pruneResourceCache(resources, "mDrawableCache");
pruneResourceCache(resources, "mColorDrawableCache");
pruneResourceCache(resources, "mColorStateListCache");
if (Build.VERSION.SDK_INT >= 23) {
pruneResourceCache(resources, "mAnimatorCache");
pruneResourceCache(resources, "mStateListAnimatorCache");
}
}
}
private static boolean pruneResourceCache(Object resources, String fieldName) {
try {
Class<?> resourcesClass = resources.getClass();
Field cacheField;
try {
cacheField = resourcesClass.getDeclaredField(fieldName);
} catch (NoSuchFieldException ignore) {
cacheField = Resources.class.getDeclaredField(fieldName);
}
cacheField.setAccessible(true);
Object cache = cacheField.get(resources);
Class<?> type = cacheField.getType();
if (Build.VERSION.SDK_INT < 16) {
if ((cache instanceof SparseArray)) {
((SparseArray) cache).clear();
return true;
}
if ((Build.VERSION.SDK_INT >= 14)
&& ((cache instanceof LongSparseArray))) {
((LongSparseArray) cache).clear();
return true;
}
} else if (Build.VERSION.SDK_INT < 23) {
if ("mColorStateListCache".equals(fieldName)) {
if ((cache instanceof LongSparseArray)) {
((LongSparseArray) cache).clear();
}
} else {
if (type.isAssignableFrom(ArrayMap.class)) {
Method clearArrayMap = Resources.class
.getDeclaredMethod("clearDrawableCachesLocked",
new Class[] { ArrayMap.class,
Integer.TYPE });
clearArrayMap.setAccessible(true);
clearArrayMap.invoke(resources, new Object[] { cache,
Integer.valueOf(-1) });
return true;
}
if (type.isAssignableFrom(LongSparseArray.class)) {
Method clearSparseMap = Resources.class
.getDeclaredMethod("clearDrawableCachesLocked",
new Class[] { LongSparseArray.class,
Integer.TYPE });
clearSparseMap.setAccessible(true);
clearSparseMap.invoke(resources, new Object[] { cache,
Integer.valueOf(-1) });
return true;
}
}
} else {
while (type != null) {
try {
Method configChangeMethod = type.getDeclaredMethod(
"onConfigurationChange",
new Class[] { Integer.TYPE });
configChangeMethod.setAccessible(true);
configChangeMethod.invoke(cache,
new Object[] { Integer.valueOf(-1) });
return true;
} catch (Throwable ignore) {
}
type = type.getSuperclass();
}
}
} catch (Throwable ignore) {
}
return false;
}
}