PopupWindow踩坑

public void showAtLocation(View parent, int gravity, int x, int y) {
        mParentRootView = new WeakReference<>(parent.getRootView());
        showAtLocation(parent.getWindowToken(), gravity, x, y);
}
public void showAtLocation(IBinder token, int gravity, int x, int y)

复用Window，需要注意与dialog的层级

如果是使用dialog的Token，则PopupWindow不会超出dialog的范围

IBinder windowToken = BaseActivity.topActivity().getWindow().getDecorView().getWindowToken();
callMethod(PopupWindow.class, popupWindow, "showAtLocation", windowToken, Gravity.TOP | Gravity.START, windowPos[0], windowPos[1]);

  public static Object callMethod(Class<?> cls, Object obj, String name, Object... args) {
        try {
            if (args != null && args.length > 0) {
                Class<?> parameterTypes[] = new Class<?>[args.length];
                Object objs[] = new Object[args.length];

                for (int i = 0; i < args.length; ++i) {
                    if (args[i] instanceof Arg) {
                        Arg arg = (Arg) args[i];
                        parameterTypes[i] = arg.type;
                        objs[i] = arg.value;
                    } else {
                        if (args[i] instanceof Integer) {
                            parameterTypes[i] = int.class;
                        } else if (args[i] instanceof Long) {
                            parameterTypes[i] = long.class;
                        } else if (args[i] instanceof Boolean) {
                            parameterTypes[i] = boolean.class;
                        } else if (args[i] instanceof Byte) {
                            parameterTypes[i] = byte.class;
                        } else if (args[i] instanceof Double) {
                            parameterTypes[i] = double.class;
                        } else if (args[i] instanceof Float) {
                            parameterTypes[i] = float.class;
                        } else {
                            parameterTypes[i] = args[i].getClass();
                        }

                        objs[i] = args[i];
                    }
                }

                if (name == null || name.length() <= 0) {
                    Constructor method = cls.getConstructor(parameterTypes);
                    method.setAccessible(true);
                    return method.newInstance(objs);
                }

                try {
                    Method method = cls.getDeclaredMethod(name, parameterTypes);
                    method.setAccessible(true);
                    return method.invoke(obj, objs);
                } catch (NoSuchMethodException e) {
                    Method[] method = cls.getDeclaredMethods();
                    for (int i = 0; i < method.length; ++i) {
                        if (method[i].getName().equals(name)) {
                            method[i].setAccessible(true);
                            return method[i].invoke(obj, objs);
                        }
                    }
                }
            } else {
                if (name == null || name.length() <= 0) {
                    Constructor method = cls.getConstructor();
                    method.setAccessible(true);
                    return method.newInstance();
                }

                try {
                    Method method = cls.getDeclaredMethod(name);
                    method.setAccessible(true);
                    return method.invoke(obj);
                } catch (NoSuchMethodException e) {
                    Method[] method = cls.getDeclaredMethods();
                    for (int i = 0; i < method.length; ++i) {
                        if (method[i].getName().equals(name)) {
                            method[i].setAccessible(true);
                            return method[i].invoke(obj);
                        }
                    }
                }
            }
        } catch (Throwable e) {
            e.printStackTrace();
        }

        return null;
    }