NullPointerException when using tooltip 2 times

[khrizt]

Hi, I'm trying to use the tooltip library on 2 different activities of my project and when the 2nd should be shown this exception appears:

java.lang.NullPointerException: Attempt to invoke virtual method 'int android.view.View.getVisibility()' on a null object reference
    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:525)
    at android.widget.FrameLayout.onLayout(FrameLayout.java:508)
    at android.view.View.layout(View.java:15654)
    at android.view.ViewGroup.layout(ViewGroup.java:4969)
    at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2102)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1859)
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1078)
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
    at android.view.Choreographer.doCallbacks(Choreographer.java:580)
    at android.view.Choreographer.doFrame(Choreographer.java:550)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5376)
    at java.lang.reflect.Method.invoke(Native Method)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)

The code I'm using is

Tooltip.make(itemView.getContext(),
                     new Tooltip.Builder()
                             .withStyleId(R.style.ToolTipLayoutCustomStyle)
                             .anchor(itemView.findViewById(R.id.detail_choice_optionA), Tooltip.Gravity.BOTTOM)
                             .closePolicy(new Tooltip.ClosePolicy()
                                     .insidePolicy(true, false)
                                     .outsidePolicy(true, false), 5000)
                             .activateDelay(1500)
                             .showDelay(300)
                             .text(itemView.getResources().getString(R.string.tooltip_choice_text))
                             .maxWidth(400)
                             .withArrow(true)
                             .withOverlay(true)
                             .floatingAnimation(Tooltip.AnimationBuilder.DEFAULT)
                             .build()
                ).show();

Any hint what's happening? Thanks!

[khrizt]

Looks like the problem is that using an adapter the cells can be redrawn whenever it chooses, so that was the origin of the problem

[michaeltnguyen]

Were you able to fix the issue? Or is the Tooltip not usable within an adapter?

[eduardbosch]

I'm having this same issue in some devices.

Is there any fix on this?

[strmchsr]

having this issue on Nexus 5

[eduardbosch]

I haven't took a look at the code, but is this possible to fix to us within an adapter?

[Sdghasemi]

The NPE is because of RecyclerView recreating views due to notifyDataSetChanged() or any other method which removes old views from ViewHolder and replace them with new ones, and the anchor view is one of them. So i moved my view declaration (just anchor) to the adapter so the reference remains for my tooltip after refilling views and it worked. Here is my code:

private ProgressBar progressBar;
private class HeaderViewHolder extends RecyclerView.ViewHolder {
    private ImageView avatarImageView;
    private Tooltip.TooltipView tooltip;

    public HeaderViewHolder(View view) {
        progressBar = (ProgressBar) view.findViewById(R.id.progress_bar);
        avatarImageView = (ImageView) view.findViewById(R.id.avatar_image_view);

        tooltip = Tooltip.make(mContext,
                new Tooltip.Builder()
                        .anchor(progressBar, Tooltip.Gravity.BOTTOM)
                        .closePolicy(new Tooltip.ClosePolicy()
                                .insidePolicy(false, true)
                                .outsidePolicy(true, true), 0)
                        .activateDelay(0)
                        .withCustomView(R.layout.profile_info_tooltip)
                        .withStyleId(R.style.TooltipStyle)
                        .withArrow(true)
                        .withOverlay(false)
                        .build()
        );
    }

    public void bindView(final Profile profile) {
        if (profile == null) return;
        .
        .
        .
        avatarImageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                tooltip.show();
            }
        });
    }
}

Hope it helps somebody.

[eduardbosch]

These PRs solves this problem:
#93
#71