Question

我遇到一个问题，键盘无法正常显示，所以底页只显示了一半（请参见第一张照片）。我想拥有它，以便当用户单击搜索栏时，底部工作表始终会扩展到页面顶部，然后出现键盘（请参见照片2）。我以为问题出在STATE_EXPANDED上，并且以某种方式禁用了键盘，但这不起作用。任何帮助将不胜感激。

class CustomBottomSheetBehavior<T : View>(private val context: Context, attrs: AttributeSet) :
    BottomSheetBehavior<T>(context, attrs), GestureDetector.OnGestureListener {

    private lateinit var customBottomSheetCallback: CustomBottomSheetCallback<T>

    private val  gestureDetector = GestureDetector(context, this)
    interface BottomSheetStateChangeListener {
        fun changeBottomSheetState(state: Int)
    }

    fun setupCallback(listener: BottomSheetStateChangeListener) {
        customBottomSheetCallback = CustomBottomSheetCallback(this, listener)
        this.setBottomSheetCallback(customBottomSheetCallback)
    }

    override fun onTouchEvent(parent: CoordinatorLayout, child: T, event: MotionEvent): Boolean {
//        gestureDetector.onTouchEvent(event)
        return super.onTouchEvent(parent, child, event)
    }

    override fun onDown(motionEvent: MotionEvent): Boolean {
        return false
    }

    override fun onShowPress(motionEvent: MotionEvent) {

    }

    override fun onSingleTapUp(motionEvent: MotionEvent): Boolean {
        state = STATE_EXPANDED
        return false
    }

    override fun onScroll(
        motionEvent: MotionEvent,
        motionEvent1: MotionEvent,
        v: Float,
        v1: Float
    ): Boolean {
        return false
    }

    override fun onLongPress(motionEvent: MotionEvent) {

    }

    override fun onFling(
        motionEvent: MotionEvent,
        motionEvent1: MotionEvent,
        v: Float,
        v1: Float
    ): Boolean {
        if(motionEvent.y < motionEvent1.y) {
            Log.d("onFling", "down swipe")
            customBottomSheetCallback.directFling = DirectFling.Down
        } else {
            Log.d("onFling", "up swipe")
            customBottomSheetCallback.directFling = DirectFling.UP
        }
        return false
    }

    enum class DirectFling {
        UP, Down
    }

    internal inner class CustomBottomSheetCallback<T : View>(private val bottomSheetBehavior: CustomBottomSheetBehavior<T>, private val listener: BottomSheetStateChangeListener) :
        BottomSheetBehavior.BottomSheetCallback() {

        // 4(Collapsed) or 3(Expanded) or 6(Half_Expanded)
        var preState = 4

        var directFling: DirectFling? = null

        private var offset: Float = 0.toFloat()

        override fun onStateChanged(view: View, state: Int) {

            if(state == STATE_SETTLING) {
                when(preState) {
                    STATE_COLLAPSED -> {
                        if (directFling == DirectFling.UP) {
                            bottomSheetBehavior.state = STATE_EXPANDED
                        }
                    }

                    STATE_EXPANDED -> {
                        if (directFling == DirectFling.Down) {
                            bottomSheetBehavior.state =  STATE_COLLAPSED

                        }
                    }
                }

            }

            if (state == STATE_COLLAPSED) {
                preState = STATE_COLLAPSED
                listener.changeBottomSheetState(STATE_HIDDEN)
                Log.d("state collapse", "full collapsed")

                //Collapse keyboard
                val imm = ContextCompat.getSystemService(view.context, InputMethodManager::class.java)
                imm?.hideSoftInputFromWindow(view.windowToken, 0)
                //Collapse keyboard
            }
            if(state == STATE_EXPANDED) {
                preState = STATE_EXPANDED
                listener.changeBottomSheetState(STATE_EXPANDED)
                Log.d("state expandedf", "full expanded")

            }
        }

        override fun onSlide(view: View, offset: Float) {
            this.offset = offset
        }
    }
}

Answer 1

我做到了！单击搜索按钮时，它是bottomSheetBehavior.state = BottomSheetBehavior.STATE_EXPANDED

键盘只允许底页打开一半

1 个答案: