Examples with AssetManager android.content.res.AssetManager used on opensource projects

Example 86 with AssetManager

use of android.content.res.AssetManager in project blog_resource by Guolei1130.

the class PatchResource method pathResource.

static void pathResource(Context context, String filePath, Collection<Activity> activities) {
    try {
        AssetManager newAssetManager = AssetManager.class.getConstructor().newInstance();
        Method mAddAssetPath = AssetManager.class.getDeclaredMethod("addAssetPath", String.class);
        mAddAssetPath.setAccessible(true);
        if (((Integer) mAddAssetPath.invoke(newAssetManager, filePath)) == 0) {
            throw new IllegalStateException("Could not create new AssetManager");
        }
        Method mEnsureStringBlocks = AssetManager.class.getDeclaredMethod("ensureStringBlocks");
        mEnsureStringBlocks.setAccessible(true);
        mEnsureStringBlocks.invoke(newAssetManager);
        if (activities != null) {
            for (Activity activity : activities) {
                Resources resources = activity.getResources();
                try {
                    // 7.0之前，用的mAssets
                    Field mAssets = Resources.class.getDeclaredField("mAssets");
                    mAssets.setAccessible(true);
                    mAssets.set(resources, newAssetManager);
                } catch (Exception e) {
                    // 7.0及以后版本，用的mResourcesImpl#mAssets
                    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);
                }
                // 使用者可能哟通过getTheme.getResource 去获取资源，因此，需要替换掉theme中的
                Resources.Theme theme = activity.getTheme();
                try {
                    // 版本差异
                    try {
                        Field ma = Resources.Theme.class.getDeclaredField("mAssets");
                        ma.setAccessible(true);
                        ma.set(theme, newAssetManager);
                    } catch (Exception e) {
                        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);
                    }
                    // 重新初始化Theme
                    Field mt = ContextThemeWrapper.class.getDeclaredField("mTheme");
                    mt.setAccessible(true);
                    mt.set(activity, null);
                    Method mtm = ContextThemeWrapper.class.getDeclaredMethod("initializeTheme");
                    mtm.setAccessible(true);
                    mtm.invoke(activity);
                    Method mCreateTheme = AssetManager.class.getDeclaredMethod("createTheme");
                    mCreateTheme.setAccessible(true);
                    Object internalTheme = mCreateTheme.invoke(newAssetManager);
                    Field mTheme = Resources.Theme.class.getDeclaredField("mTheme");
                    mTheme.setAccessible(true);
                    mTheme.set(theme, internalTheme);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                pruneResourceCaches(resources);
            }
        }
        // 替换掉缓存起来的
        Collection<WeakReference<Resources>> references;
        if (SDK_INT >= KITKAT) {
            Class<?> resourcesManagerClass = Class.forName("android.app.ResourcesManager");
            Method mGetInstance = resourcesManagerClass.getDeclaredMethod("getInstance");
            mGetInstance.setAccessible(true);
            Object resourcesManager = mGetInstance.invoke(null);
            try {
                Field fMActiveResources = resourcesManagerClass.getDeclaredField("mActiveResources");
                fMActiveResources.setAccessible(true);
                @SuppressWarnings("unchecked") ArrayMap<?, WeakReference<Resources>> arrayMap = (ArrayMap<?, WeakReference<Resources>>) fMActiveResources.get(resourcesManager);
                references = arrayMap.values();
            } catch (NoSuchFieldException ignore) {
                Field mResourceReferences = resourcesManagerClass.getDeclaredField("mResourceReferences");
                mResourceReferences.setAccessible(true);
                // noinspection unchecked
                references = (Collection<WeakReference<Resources>>) mResourceReferences.get(resourcesManager);
            }
        } else {
            Class<?> activityThread = Class.forName("android.app.ActivityThread");
            Field fMActiveResources = activityThread.getDeclaredField("mActiveResources");
            fMActiveResources.setAccessible(true);
            Object thread = getActivityThread(context, activityThread);
            @SuppressWarnings("unchecked") HashMap<?, WeakReference<Resources>> map = (HashMap<?, WeakReference<Resources>>) fMActiveResources.get(thread);
            references = map.values();
        }
        for (WeakReference<Resources> wr : references) {
            Resources resources = wr.get();
            if (resources != null) {
                // Set the AssetManager of the Resources instance to our brand new one
                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 (Exception e) {
        e.printStackTrace();
    }
}

Example 87 with AssetManager

use of android.content.res.AssetManager in project XUtil by xuexiangjys.

the class ResourceUtils method getImageFromAssetsFile.

/**
 * 从Assets中读取图片
 */
public static Bitmap getImageFromAssetsFile(String fileName) {
    Bitmap image = null;
    AssetManager am = getAssetManager();
    try {
        InputStream is = am.open(fileName);
        image = BitmapFactory.decodeStream(is);
        is.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
    return image;
}

Example 88 with AssetManager

use of android.content.res.AssetManager in project AndroidLife by CaMnter.

the class MonkeyPatcher method monkeyPatchExistingResources.

/**
 * 1. 反射调用 AssetManager.addAssetPath 方法加载 补丁资源
 * 2. Hook Resource or ResourcesImpl 中的 mAssets，Hook 为 补丁资源
 * 3. Hook Resource or ResourcesImpl 内 Theme or ThemeImpl 中的 mAssets，Hook 为 补丁资源
 * 4. Hook Activity（ ContextThemeWrapper ）的 initializeTheme 方法去初始化 Theme
 * 5. 如果 < 7.0， 先 Hook AssetManager 的 createTheme 方法去创建一个 补丁 Theme
 *    然后 Hook Activity 的 Theme 的 mTheme Field 为 补丁 Theme
 * 6. 调用 pruneResourceCaches(@NonNull Object resources) 方法去删除 资源缓存
 *
 * @param context context
 * @param externalResourceFile 外部资源 path
 * @param activities 运行 activity
 */
public static void monkeyPatchExistingResources(@Nullable Context context, @Nullable String externalResourceFile, @Nullable Collection<Activity> activities) {
    if (externalResourceFile == null) {
        return;
    }
    try {
        /**
         * Step 1
         *
         * 反射 AssetManager#addAssetPath 方法
         * 加载补丁资源的 AssetManager
         */
        // Create a new AssetManager instance and point it to the resources installed under
        // /sdcard
        AssetManager newAssetManager = AssetManager.class.getConstructor().newInstance();
        Method mAddAssetPath = AssetManager.class.getDeclaredMethod("addAssetPath", String.class);
        mAddAssetPath.setAccessible(true);
        if (((Integer) mAddAssetPath.invoke(newAssetManager, externalResourceFile)) == 0) {
            throw new IllegalStateException("Could not create new AssetManager");
        }
        /**
         * Step 2
         *
         * 反射 Hook 补丁资源 AssetManager 的 ensureStringBlocks Field 为 true
         * 下面注释告诉，4.4 需要这么做
         */
        // Kitkat needs this method call, Lollipop doesn't. However, it doesn't seem to cause any harm
        // in L, so we do it unconditionally.
        Method mEnsureStringBlocks = AssetManager.class.getDeclaredMethod("ensureStringBlocks");
        mEnsureStringBlocks.setAccessible(true);
        mEnsureStringBlocks.invoke(newAssetManager);
        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);
                    }
                    /**
                     * Step 5
                     *
                     * Hook Activity（ ContextThemeWrapper ）的 mTheme Field 为 null
                     * Hook Activity（ ContextThemeWrapper ）的 initializeTheme 方法去初始化 Theme
                     */
                    Field mt = ContextThemeWrapper.class.getDeclaredField("mTheme");
                    mt.setAccessible(true);
                    mt.set(activity, null);
                    Method mtm = ContextThemeWrapper.class.getDeclaredMethod("initializeTheme");
                    mtm.setAccessible(true);
                    mtm.invoke(activity);
                    if (SDK_INT < 24) {
                        // As of API 24, mTheme is gone (but updates work
                        // without these changes
                        Method mCreateTheme = AssetManager.class.getDeclaredMethod("createTheme");
                        mCreateTheme.setAccessible(true);
                        Object internalTheme = mCreateTheme.invoke(newAssetManager);
                        Field mTheme = Resources.Theme.class.getDeclaredField("mTheme");
                        mTheme.setAccessible(true);
                        mTheme.set(theme, internalTheme);
                    }
                } catch (Throwable e) {
                    Log.e(LOG_TAG, "Failed to update existing theme for activity " + activity, e);
                }
                /**
                 * Step 7
                 *
                 * 调用 pruneResourceCaches(@NonNull Object resources) 方法去删除 资源缓存
                 */
                pruneResourceCaches(resources);
            }
        }
        /**
         * Step 8
         *
         * 1. 如果 > 4.4，反射拿到 ResourcesManager 的 getInstance 方法。获取 ResourcesManager 的单例对象，
         *    有两种选择：
         *    1.1 反射获取 mActiveResources Field，强转为 ArrayMap<?, WeakReference<Resources>> 类型，赋值给 references
         *    1.2 反射获取 mResourceReferences Field，强转为 Collection<WeakReference<Resources>> 类型，赋值给 references
         *
         * 2. 如果 <= 4.4，通过 getActivityThread 方法去获取进程中的 ActivityThread 实例。 然后反射
         *    获取 ActivityThread 的 mActiveResources Field，强转为 HashMap<?, WeakReference<Resources>> 类型，赋值给 references
         *
         * 3. 将 1 or 2 环境中，保存下来的 references 进行遍历，拿到每一个 WeakReference<Resources>
         *    有两种选择：
         *    3.1 Hook Resource 的 mAssets Field 的值为 补丁 AssetManager
         *    3.2 如果 3.1 失败被 catch 了，反射拿到 Resource mResourcesImpl Field（ ResourcesImpl ）
         *        然后 Hook ResourcesImpl 的 mAssets Field 的值为 补丁 AssetManager
         */
        // Iterate over all known Resources objects
        Collection<WeakReference<Resources>> references;
        if (SDK_INT >= KITKAT) {
            // Find the singleton instance of ResourcesManager
            Class<?> resourcesManagerClass = Class.forName("android.app.ResourcesManager");
            Method mGetInstance = resourcesManagerClass.getDeclaredMethod("getInstance");
            mGetInstance.setAccessible(true);
            Object resourcesManager = mGetInstance.invoke(null);
            try {
                Field fMActiveResources = resourcesManagerClass.getDeclaredField("mActiveResources");
                fMActiveResources.setAccessible(true);
                @SuppressWarnings("unchecked") ArrayMap<?, WeakReference<Resources>> arrayMap = (ArrayMap<?, WeakReference<Resources>>) fMActiveResources.get(resourcesManager);
                references = arrayMap.values();
            } catch (NoSuchFieldException ignore) {
                Field mResourceReferences = resourcesManagerClass.getDeclaredField("mResourceReferences");
                mResourceReferences.setAccessible(true);
                // noinspection unchecked
                references = (Collection<WeakReference<Resources>>) mResourceReferences.get(resourcesManager);
            }
        } else {
            Class<?> activityThread = Class.forName("android.app.ActivityThread");
            Field fMActiveResources = activityThread.getDeclaredField("mActiveResources");
            fMActiveResources.setAccessible(true);
            Object thread = getActivityThread(context, activityThread);
            @SuppressWarnings("unchecked") HashMap<?, WeakReference<Resources>> map = (HashMap<?, WeakReference<Resources>>) fMActiveResources.get(thread);
            references = map.values();
        }
        for (WeakReference<Resources> wr : references) {
            Resources resources = wr.get();
            if (resources != null) {
                // Set the AssetManager of the Resources instance to our brand new one
                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);
    }
}

Example 89 with AssetManager

use of android.content.res.AssetManager in project AndroidLife by CaMnter.

the class AssetsUtils method extractAssets.

/**
 * 把 Assets 里面得文件复制到 /data/data/files 目录下
 *
 * @param context context
 * @param sourceName sourceName
 */
public static void extractAssets(@NonNull final Context context, @NonNull final String sourceName) {
    AssetManager assetManager = context.getAssets();
    InputStream is = null;
    FileOutputStream fos = null;
    try {
        is = assetManager.open(sourceName);
        File extractFile = context.getFileStreamPath(sourceName);
        fos = new FileOutputStream(extractFile);
        byte[] buffer = new byte[1024];
        int count;
        while ((count = is.read(buffer)) > 0) {
            fos.write(buffer, 0, count);
        }
        fos.flush();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        closeSilently(is);
        closeSilently(fos);
    }
}

Example 90 with AssetManager

use of android.content.res.AssetManager in project AndroidLife by CaMnter.

the class AssetsUtils method extractAssets.

/**
 * 把 Assets 里面得文件复制到 /data/data/files 目录下
 *
 * @param context context
 * @param sourceName sourceName
 */
public static void extractAssets(@NonNull final Context context, @NonNull final String sourceName) {
    AssetManager assetManager = context.getAssets();
    InputStream is = null;
    FileOutputStream fos = null;
    try {
        is = assetManager.open(sourceName);
        File extractFile = context.getFileStreamPath(sourceName);
        fos = new FileOutputStream(extractFile);
        byte[] buffer = new byte[1024];
        int count;
        while ((count = is.read(buffer)) > 0) {
            fos.write(buffer, 0, count);
        }
        fos.flush();
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        closeSilently(is);
        closeSilently(fos);
    }
}