android资源的热更新(替换 AssetManager+LoadedApk中的资源路径)

来源：互联网发布：淘宝买csgo钥匙编辑：程序博客网时间：2024/06/05 03:30
设置LoadedApk中的mResDir
创建AssetManager, 设置资源包路径
替换AssetManager
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 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 arrayMap = (ArrayMap) fMActiveResources.get(resourcesManager);        references = arrayMap.values();    } catch (NoSuchFieldException ignore) {        Field mResourceReferences = resourcesManagerClass                .getDeclaredField("mResourceReferences");        mResourceReferences.setAccessible(true);        Collection 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 map = (HashMap) fMActiveResources.get(thread);    references = map.values();}for (WeakReference 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());    }}
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