Question

我必须进行一些不稳定的测试，并且遇到一个例外，我有时会使用robotium

Caused by: java.lang.NullPointerException
at com.jayway.android.robotium.solo.ViewFetcher.getTopParent(ViewFetcher.java:44)
at com.jayway.android.robotium.solo.PublicViewFetcher.getTopParent(PublicViewFetcher.java:6)
at com.jayway.android.robotium.solo.ViewFetcher.getTopParent(ViewFetcher.java:46)
at com.jayway.android.robotium.solo.PublicViewFetcher.getTopParent(PublicViewFetcher.java:6)
at com.jayway.android.robotium.solo.ViewFetcher.getTopParent(ViewFetcher.java:46)
at com.jayway.android.robotium.solo.PublicViewFetcher.getTopParent(PublicViewFetcher.java:6)
at com.jayway.android.robotium.solo.ViewFetcher.getTopParent(ViewFetcher.java:46)
at com.jayway.android.robotium.solo.PublicViewFetcher.getTopParent(PublicViewFetcher.java:6)
at com.jayway.android.robotium.solo.ViewFetcher.getTopParent(ViewFetcher.java:46)
at com.jayway.android.robotium.solo.PublicViewFetcher.getTopParent(PublicViewFetcher.java:6)
at com.jayway.android.robotium.solo.ViewFetcher.getTopParent(ViewFetcher.java:46)
at com.jayway.android.robotium.solo.PublicViewFetcher.getTopParent(PublicViewFetcher.java:6)
at com.jayway.android.robotium.solo.ViewFetcher.getTopParent(ViewFetcher.java:46)
at com.jayway.android.robotium.solo.PublicViewFetcher.getTopParent(PublicViewFetcher.java:6)
at com.jayway.android.robotium.solo.ViewFetcher.getTopParent(ViewFetcher.java:46)
at com.jayway.android.robotium.solo.PublicViewFetcher.getTopParent(PublicViewFetcher.java:6)
at query.Query.rootViews(Query.java:113)
at query.Query.executeQuery(Query.java:29)

这是来自robotium的getTopParent方法：

/**
 * Returns the absolute top parent {@code View} in for a given {@code View}.
 *
 * @param view the {@code View} whose top parent is requested
 * @return the top parent {@code View}
 */

public View getTopParent(View view) {
    if (view.getParent() != null // line 44
            && view.getParent() instanceof android.view.View) {
        return getTopParent((View) view.getParent()); // line 46
    } else {
        return view;
    }
}

据我所知，这意味着view.getParent（）在null-check和从视图的递归调用之间发生变化？我可以想象向机器人发出拉动请求，将getTopParent更改为：

/**
 * Returns the absolute top parent {@code View} in for a given {@code View}.
 *
 * @param view the {@code View} whose top parent is requested
 * @return the top parent {@code View}
 */

public View getTopParent(View view) {
            final ViewParent parent = view.getParent();
    if (parent != null && parent instanceof android.view.View) {
        return getTopParent((View) parent);
    } else {
        return view;
    }
}

但我希望在此之前有更多意见。

Answer 1

此更改现在在机器人大师身上：

https://github.com/RobotiumTech/robotium/commit/a004cf8cd012709b606590079d5667e519c0d25b https://github.com/RobotiumTech/robotium/commit/f6b8c9998bf1fe04dd7ff838aab7cdb703cc483e

更多背景信息：

https://groups.google.com/forum/#!topic/robotium-developers/egAxzgsRYZI

机器人内部的NPE

1 个答案: