Robotium AssertionFailedError：无法完成单击

Question

I have been getting "Click can not be completed" error when running my tests but it happens intermittently.

Before calling clickOnView, I make sure that the view is not null.

Is there anything else that I need to check on before calling clickOnView?

Button btnLike = (Button) vwItem.findViewById(R.id.buttonLike);
assertTrue(solo.waitForCondition(new Common.WaitUntilViewNotNull(solo, vwItem, R.id.buttonLike), 5000));
solo.clickOnView(btnLike);

public static class WaitUntilViewNotNull implements Condition {
    int viewId;
    Solo solo;
    View parentView;

    public WaitUntilViewNotNull(Solo solo, View parentView, int viewId) {
        this.solo = solo;
        this.viewId = viewId;
        this.parentView = parentView;
    }

    @Override
    public boolean isSatisfied() {

        View v = null;
        if (parentView != null) {
            v = (View)parentView.findViewById(viewId);

        }
        else {
            v = (View) solo.getView(viewId);
        }

        return v != null;
    }

}

Answer 1

It seems that problem is in assigning btnLike variable before view is rendered. Therefore it equals null .

BTW, probably you'd prefer waitForView instead of custom Condition .

assertTrue(solo.waitForView(R.id.buttonLike, 1, 5000));
Button btnLike = (Button) vwItem.findViewById(R.id.buttonLike);
solo.clickOnView(btnLike);