Android-在视图上检测两次轻击和三次轻击 [英] Android - Detect doubletap AND tripletap on view

问题描述

我一直在尝试构建一个可以同时检测双头和三头抽头的抽头检测器.在我的努力失败之后，我在网上搜索了很长时间，找到了可以使用但没有运气的东西！奇怪的是，像这样的东西的图书馆如此稀缺.有帮助吗?

I've been trying to build a tap detector that can detect both double and tripe tap. After my efforts failed I searched a long time on the net to find something ready to use but no luck! It's strange that libraries for something like this are so scarce. Any help ??

推荐答案

您可以尝试这样的操作.

You can try something like this.

尽管我通常建议不要将三次轻击用作一种模式，因为通常用户并不习惯这种方式，因此，除非将其正确传达给他们，否则大多数人可能永远都不知道他们可以三次轻击视图.实际上，在移动设备上双击也是如此，但在该环境中交互并不总是一种直观的方式.

Though I would generally recommend against using triple taps as a pattern as it is not something users are generally used to, so unless it's properly communicated to them, most might never know they can triple tap a view. Same goes for double taping actually on mobile devices, it's not always an intuitive way to interact in that environment.

view.setOnTouchListener(new View.OnTouchListener() {
    Handler handler = new Handler();

    int numberOfTaps = 0;
    long lastTapTimeMs = 0;
    long touchDownMs = 0;

    @Override
    public boolean onTouch(View v, MotionEvent event) {

        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                touchDownMs = System.currentTimeMillis();
                break;
            case MotionEvent.ACTION_UP:
                handler.removeCallbacksAndMessages(null);

                if ((System.currentTimeMillis() - touchDownMs) > ViewConfiguration.getTapTimeout()) {
                    //it was not a tap

                    numberOfTaps = 0;
                    lastTapTimeMs = 0;
                    break;
                }

                if (numberOfTaps > 0 
                        && (System.currentTimeMillis() - lastTapTimeMs) < ViewConfiguration.getDoubleTapTimeout()) {
                    numberOfTaps += 1;
                } else {
                    numberOfTaps = 1;
                }

                lastTapTimeMs = System.currentTimeMillis();

                if (numberOfTaps == 3) {
                    Toast.makeText(getApplicationContext(), "triple", Toast.LENGTH_SHORT).show();
                    //handle triple tap
                } else if (numberOfTaps == 2) {
                    handler.postDelayed(new Runnable() {
                        @Override
                        public void run() {
                            //handle double tap
                            Toast.makeText(getApplicationContext(), "double", Toast.LENGTH_SHORT).show();
                        }
                    }, ViewConfiguration.getDoubleTapTimeout());
                }
        }

        return true;
    }
});

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