Android-处理多次点击

Question

I have a functionality where user has a option to flip the camera from back to front and front to back on click of a button .

Something like -

  rlFlipCamera.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            switchCamera();

        }
    });

Now if the user clicks it multiple times , the function tries to switch the camera multiple times which leads to lag/hang on some devices . I want to prevent this using a logic -

1. If the user clicks the button multiple times , i will store the count .
2. If the count is odd number , i will  switch the camera .
3. If the count is even number , i will not switch the camera .

I am not sure how to get the button click count . Please help.

Thanks .

Answer 1

This below sample may help you to solve the issue,

rlFlipCamera.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {
      if(SystemClock.elapsedRealtime() - mLastClickTime<UtilityClass.CLICK_INTERVAL)  {
            return;
      }
       mLastClickTime = SystemClock.elapsedRealtime();
       switchCamera();

     }
    });

As per my understanding, here you dont need to maintain any count. If the user clicks the rlFlipCamera button, he wants to change the camera, he is not going to play with our application. If you follow the count then you maynot give right result to the user.Because,He don't know wether he clicked the button in odd or even numbers.

Answer 2

I think it's not the best approach for this issue. Actually, you can consider about a flag variable like "isSwitching".

rlFlipCamera.setOnClickListener(new OnClickListener() {

    @Override
    public void onClick(View v) {
        if (!isSwitching) {
            switchCamera();
        }
    }
});