如何检测在调用 onClick 处理程序时是否按下了 shift 键？

Question

I am writing an app for a Chromebook in Java.

In my onClick() event handler, how can I detect if the Shift key was pressed when the click occurred?

Answer 1

You could use a boolean that you put to true onKeyDown() and to false onKeyUp() .

Here is some Doc to help you: https://developer.android.com/training/keyboard-input/commands

Answer 2

Here is the code I used to implement this:

int shiftHeld = 0;

@Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_SHIFT_LEFT || keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT)
            shiftHeld = 0;
                return super.onKeyUp(keyCode, event);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (keyCode == KeyEvent.KEYCODE_SHIFT_LEFT || keyCode == KeyEvent.KEYCODE_SHIFT_RIGHT)
            shiftHeld = 1;
        return super.onKeyDown(keyCode, event);
    }