Merge "Handle BadTokenException exception more reliably."

                try {

                    showWindow(true);

                } catch (BadTokenException e) {

                    if (DEBUG) Log.v(TAG, "BadTokenException: IME is done.");

                    mWindowVisible = false;

                    mWindowAdded = false;

                    // We have ignored BadTokenException here since Jelly Bean MR-2 (API Level 18).

                    // We could ignore BadTokenException in InputMethodService#showWindow() instead,

                    // but it may break assumptions for those who override #showWindow() that we can

                    // detect errors in #showWindow() by checking BadTokenException.

                    // TODO: Investigate its feasibility.  Update JavaDoc of #showWindow() of

                    // whether it's OK to override #showWindow() or not.

                }

            }

            clearInsetOfPreviousIme();

            mWindowWasVisible = mWindowVisible;

            mInShowWindow = true;

            showWindowInner(showInput);

        } catch (BadTokenException e) {

            // BadTokenException is a normal consequence in certain situations, e.g., swapping IMEs

            // while there is a DO_SHOW_SOFT_INPUT message in the IIMethodWrapper queue.

            if (DEBUG) Log.v(TAG, "BadTokenException: IME is done.");

            mWindowVisible = false;

            mWindowAdded = false;

            // Rethrow the exception to preserve the existing behavior.  Some IMEs may have directly

            // called this method and relied on this exception for some clean-up tasks.

            // TODO: Give developers a clear guideline of whether it's OK to call this method or

            // InputMethodManager#showSoftInputFromInputMethod() should always be used instead.

            throw e;

        } finally {

            // TODO: Is it OK to set true when we get BadTokenException?

            mWindowWasVisible = true;

            mInShowWindow = false;

        }