问牛油糖上的android.os.TransactionTooLargeException

EN

     try {
            if (DEBUG_MEMORY_TRIM) Slog.v(TAG, "Reporting activity stopped: " + activity);
            ActivityManagerNative.getDefault().activityStopped(
                activity.token, state, persistentState, description);
        } catch (RemoteException ex) {
            if (ex instanceof TransactionTooLargeException
                    && activity.packageInfo.getTargetSdkVersion() < Build.VERSION_CODES.N) {
                Log.e(TAG, "App sent too much data in instance state, so it was ignored", ex);
                return;
            }
            throw ex.rethrowFromSystemServer();
        }

private boolean hookActivityManagerNative() {
    try {
        ClassLoader loader = ClassLoader.getSystemClassLoader();
        Field singletonField = ReflectUtils.findField(loader.loadClass("android.app.ActivityManagerNative"), "gDefault");
        ReflectUtils.ReflectObject singletonObjWrap = ReflectUtils.wrap(singletonField.get(null));
        Object realActivityManager = singletonObjWrap.getChildField("mInstance").get();
        Object fakeActivityManager = Proxy.newProxyInstance(ClassLoader.getSystemClassLoader(),
                new Class[]{loader.loadClass("android.app.IActivityManager")}, new ActivityManagerHook(realActivityManager));
        singletonObjWrap.setChildField("mInstance", fakeActivityManager);
        return true;
    } catch (Throwable e) {
        AppHolder.getThirdPartUtils().markException(e);
        return false;
    }
}

private static class ActivityManagerHook implements InvocationHandler {

    private Object origin;

    ActivityManagerHook(Object origin) {
       this.origin = origin;
    }

    public Object getOrigin() {
        return origin;
    }

    @Override
    public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
        switch (method.getName()) {
            //ActivityManagerNative.getDefault().activityStopped(activity.token, state, persistentState, description);
            case "activityStopped": {
                try {
                    return method.invoke(getOrigin(), args);
                } catch (Exception e) {
                    e.printStackTrace();
                }
                return null;
            }
        }
        return method.invoke(getOrigin(), args);
    }
}

public class ReflectUtils {

private static final HashMap<String, Field> fieldCache = new HashMap<>();
private static final HashMap<String, Method> methodCache = new HashMap<>();

public static Field findField(Class<?> clazz, String fieldName) throws Throwable {
    String fullFieldName = clazz.getName() + '#' + fieldName;

    if (fieldCache.containsKey(fullFieldName)) {
        Field field = fieldCache.get(fullFieldName);
        if (field == null)
            throw new NoSuchFieldError(fullFieldName);
        return field;
    }

    try {
        Field field = findFieldRecursiveImpl(clazz, fieldName);
        field.setAccessible(true);
        fieldCache.put(fullFieldName, field);
        return field;
    } catch (NoSuchFieldException e) {
        fieldCache.put(fullFieldName, null);
        throw new NoSuchFieldError(fullFieldName);
    }
}


private static Field findFieldRecursiveImpl(Class<?> clazz, String fieldName) throws NoSuchFieldException {
    try {
        return clazz.getDeclaredField(fieldName);
    } catch (NoSuchFieldException e) {
        while (true) {
            clazz = clazz.getSuperclass();
            if (clazz == null || clazz.equals(Object.class))
                break;

            try {
                return clazz.getDeclaredField(fieldName);
            } catch (NoSuchFieldException ignored) {
            }
        }
        throw e;
    }
}


public static Method findMethodExact(Class<?> clazz, String methodName, Class<?>... parameterTypes) throws Throwable {
    String fullMethodName = clazz.getName() + '#' + methodName + getParametersString(parameterTypes) + "#exact";

    if (methodCache.containsKey(fullMethodName)) {
        Method method = methodCache.get(fullMethodName);
        if (method == null)
            throw new NoSuchMethodError(fullMethodName);
        return method;
    }

    try {
        Method method = clazz.getDeclaredMethod(methodName, parameterTypes);
        method.setAccessible(true);
        methodCache.put(fullMethodName, method);
        return method;
    } catch (NoSuchMethodException e) {
        methodCache.put(fullMethodName, null);
        throw new NoSuchMethodError(fullMethodName);
    }
}


/**
 * Returns an array of the given classes.
 */
public static Class<?>[] getClassesAsArray(Class<?>... clazzes) {
    return clazzes;
}

private static String getParametersString(Class<?>... clazzes) {
    StringBuilder sb = new StringBuilder("(");
    boolean first = true;
    for (Class<?> clazz : clazzes) {
        if (first)
            first = false;
        else
            sb.append(",");

        if (clazz != null)
            sb.append(clazz.getCanonicalName());
        else
            sb.append("null");
    }
    sb.append(")");
    return sb.toString();
}

/**
 * Retrieve classes from an array, where each element might either be a Class
 * already, or a String with the full class name.
 */
private static Class<?>[] getParameterClasses(ClassLoader classLoader, Object[] parameterTypes) throws ClassNotFoundException {
    Class<?>[] parameterClasses = null;
    for (int i = parameterTypes.length - 1; i >= 0; i--) {
        Object type = parameterTypes[i];
        if (type == null)
            throw new ClassNotFoundException("parameter type must not be null", null);

        if (parameterClasses == null)
            parameterClasses = new Class<?>[i + 1];

        if (type instanceof Class)
            parameterClasses[i] = (Class<?>) type;
        else if (type instanceof String)
            parameterClasses[i] = findClass((String) type, classLoader);
        else
            throw new ClassNotFoundException("parameter type must either be specified as Class or String", null);
    }

    // if there are no arguments for the method
    if (parameterClasses == null)
        parameterClasses = new Class<?>[0];

    return parameterClasses;
}

public static Class<?> findClass(String className, ClassLoader classLoader) throws ClassNotFoundException {
    if (classLoader == null)
        classLoader = ClassLoader.getSystemClassLoader();
    return classLoader.loadClass(className);
}


public static ReflectObject wrap(Object object) {
    return new ReflectObject(object);
}


public static class ReflectObject {

    private Object object;

    private ReflectObject(Object o) {
        this.object = o;
    }

    public ReflectObject getChildField(String fieldName) throws Throwable {
        Object child = ReflectUtils.findField(object.getClass(), fieldName).get(object);
        return ReflectUtils.wrap(child);
    }

    public void setChildField(String fieldName, Object o) throws Throwable {
        ReflectUtils.findField(object.getClass(), fieldName).set(object, o);
    }

    public ReflectObject callMethod(String methodName, Object... args) throws Throwable {
        Class<?>[] clazzs = new Class[args.length];
        for (int i = 0; i < args.length; i++) {
            clazzs[i] = args.getClass();
        }
        Method method = ReflectUtils.findMethodExact(object.getClass(), methodName, clazzs);
        return ReflectUtils.wrap(method.invoke(object, args));
    }

    public <T> T getAs(Class<T> clazz) {
        return (T) object;
    }

    public <T> T get() {
        return (T) object;
    }
}
}