Question

我正在开发一个我需要的应用程序。用户的方向在Action.Down中将手指拖到屏幕上（在他抬起手指之前）如果我编码了一些代码，但只有在用户从移动活动中抬起手指后才会告诉值。但我希望用户的动作方向，而他的手指放在屏幕上

layout.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            switch (event.getAction()) {

                case MotionEvent.ACTION_DOWN: {
                    // store the X value when the user's finger was pressed down
                    downXValue = event.getX();
                    downYValue = event.getY();
                    Log.d("recording", "= " + downYValue);
                    break;
                }

                case MotionEvent.ACTION_UP: {
                    // Get the X value when the user released his/her finger
                    float currentX = event.getX();
                    float currentY = event.getY();
                    // check if horizontal or vertical movement was bigger

                    if (Math.abs(downXValue - currentX) > Math.abs(downYValue
                            - currentY)) {
                        Log.d("recording", "x");
                        // going backwards: pushing stuff to the right
                        if (downXValue < currentX) {
                            Log.d("recording", "right");

                        }

                        // going forwards: pushing stuff to the left
                        if (downXValue > currentX) {
                            Log.d("recording", "left");

                        }

                    } else {
                        Log.d("recording", "y ");

                        if (downYValue < currentY) {
                            Log.d("recording", "down");




                            }
                        }
                        if (downYValue > currentY) {
                            Log.d("recording", "up");




                        }
                    }
                    break;
                }

            }

            return true;

        }


    });

Answer 1

使用MotionEvent.ACTION_MOVE代替MotionEvent.ACTION_UP

<强> ACTION_MOVE

getActionMasked（）的常量：在按下期间发生了更改手势（在ACTION_DOWN和ACTION_UP之间）。动议包含最近的一点，以及自上次以来的任何中间点向下或移动事件。

<强> ACTION_UP

getActionMasked（）的常量：按下的手势已经完成， motion包含最终发布位置以及任何中间位置自上次下跌或移动事件以来的点数。

试试这个：

layout.setOnTouchListener(new View.OnTouchListener() {
        @Override
        public boolean onTouch(View v, MotionEvent event) {

            switch (event.getAction()) {

                case MotionEvent.ACTION_DOWN: {
                    // store the X value when the user's finger was pressed down
                    downXValue = event.getX();
                    downYValue = event.getY();
                    Log.d("recording", "= " + downYValue);
                    break;
                }

                case MotionEvent.ACTION_MOVE: {
                    // Get the X value when the user released his/her finger
                    float currentX = event.getX();
                    float currentY = event.getY();
                    // check if horizontal or vertical movement was bigger

                    if (Math.abs(downXValue - currentX) > Math.abs(downYValue
                            - currentY)) {
                        Log.d("recording", "x");
                        // going backwards: pushing stuff to the right
                        if (downXValue < currentX) {
                            Log.d("recording", "right");

                        }

                        // going forwards: pushing stuff to the left
                        if (downXValue > currentX) {
                            Log.d("recording", "left");

                        }

                    } else {
                        Log.d("recording", "y ");

                        if (downYValue < currentY) {
                            Log.d("recording", "down");




                            }
                        }
                        if (downYValue > currentY) {
                            Log.d("recording", "up");




                        }
                    }
                    break;
                }

            }

            return true;

        }


    });

在Android活动中获取用户的动作

1 个答案: