Fast taps (clicks) on RecyclerView opens multiple Fragments

Question

I have implemented onClick listener to my ViewHolder for my RecyclerView

But when I perform very fast double taps or mouse clicks, it performs the task (opens a seperate

Answer 1

• Create a boolean variable in Adapter

boolean canStart = true;

• Make OnClickListener like

ViewHolder.dataText.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        if (canStart) {
            canStart = false; // do canStart false 
            // Whatever you want to do and not have run twice due to double tap
        }
    }
}

• Add setCanStart method in Adapter class:

public void setCanStart(boolean can){
    canStart = can;
}

• At last in the fragment's or Activity's ( Where the adapter is assigned to the recyclerview ) add this onResume()

@Override
    public void onResume() {
        super.onResume();
        mAdapter.setCanStart(true);
    }

Hope it will help :)

Answer 2

If you are using Kotlin you can go with this based on Money's answer

class CodeThrottle {
    companion object {
        const val MIN_INTERVAL = 300
    }
    private var lastEventTime = System.currentTimeMillis()

    fun throttle(code: () -> Unit) {
        val eventTime = System.currentTimeMillis()
        if (eventTime - lastEventTime > MIN_INTERVAL) {
            lastEventTime = eventTime
            code()
        }
    }
}

Create this object in your view holder

    private val codeThrottle = CodeThrottle()

Then do the following in your bind

name.setOnClickListener { codeThrottle.throttle { listener.onCustomerClicked(customer, false) } }

Putting whatever code you need called in place of

listener.onCustomerClicked(customer, false) 

Answer 3

You can modify it like this.

public class ViewHolder extends RecyclerView.ViewHolder implements
        View.OnClickListener {
    TextView tvTitle, tvDescription;
    private long mLastClickTime = System.currentTimeMillis();
    private static final long CLICK_TIME_INTERVAL = 300;

    public ViewHolder(View itemView) {
        super(itemView);
        itemView.setClickable(true);
        itemView.setOnClickListener(this);

        tvTitle = (TextView) itemView.findViewById(R.id.tv_title);
        tvDescription = (TextView) itemView
                .findViewById(R.id.tv_description);
    }

    @Override
    public void onClick(View v) {
        long now = System.currentTimeMillis();
        if (now - mLastClickTime < CLICK_TIME_INTERVAL) {
            return;
        }
        mLastClickTime = now;
        mListener.onClick(FRAGMENT_VIEW, getAdapterPosition()); // open
                                                                // FRAGMENT_VIEW
    }
}

Answer 4

You can make class implementing View.OnClickListener

public class DoubleClickHelper implements View.OnClickListener {

    private long mLastClickTime = System.currentTimeMillis();
    private static final long CLICK_TIME_INTERVAL = 300;
    private Callback callback;

    public DoubleClickHelper(Callback callback) {
        this.callback = callback;
    }

    @Override
    public void onClick(View v) {
        long now = System.currentTimeMillis();
        if (now - mLastClickTime < CLICK_TIME_INTERVAL) {
            return;
        }
        mLastClickTime = now;
        callback.handleClick();
    }

    public interface Callback {
        void handleClick();
    }
}

And than use it like:

ivProduct.setOnClickListener(new DoubleClickHelper(() -> listener.onProductInfoClick(wItem)));