uiautomator 2.0 长按keycode物理按键

private UiDevice mDevice;

 // 长按物理键
    public  boolean longPressKeyCode(int keyCode,int PressTime) {
        try {

            Field mUiAutomationBridge = Class.forName("android.support.test.uiautomator.UiDevice").getDeclaredField("mUiAutomationBridge");
            mUiAutomationBridge.setAccessible(true);

            Object bridgeObj = mUiAutomationBridge.get(mDevice);
            Method injectInputEvent = Class.forName("android.support.test.uiautomator.UiAutomatorBridge")
                    .getDeclaredMethod("injectInputEvent",new Class[]{android.view.InputEvent.class,boolean.class});


            final long eventTime = SystemClock.uptimeMillis();
            KeyEvent downEvent = new KeyEvent(eventTime, eventTime, KeyEvent.ACTION_DOWN,
                    keyCode, 0, 0, KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0,
                    InputDevice.SOURCE_KEYBOARD);


            if ((Boolean) injectInputEvent.invoke(bridgeObj, new Object[]{downEvent, true})) {

                SystemClock.sleep(PressTime);

                KeyEvent upEvent = new KeyEvent(eventTime, eventTime,
                        KeyEvent.ACTION_UP, keyCode, 0, 0,
                        KeyCharacterMap.VIRTUAL_KEYBOARD, 0, 0,
                        InputDevice.SOURCE_KEYBOARD);
                if ((Boolean) injectInputEvent.invoke(bridgeObj, new Object[]{upEvent, true})) {
                    return true;
                }
            }

        } catch (NoSuchMethodException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        } catch (NoSuchFieldException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }

        return false;
    }