Question

当我在应用程序中单击“后退”按钮时，在getResource（）方法中得到了NullPointerException。 getResource用于网址中，并在glideApp中调用。

我的代码

private void setupPostUserImage(ImageView image, PostDetail detail) {
    mUserPicture.setVisibility(View.VISIBLE);
    String url = getActivity().getResources().getString(R.string.profile_image_path1) + "/" + detail.getUser_id_fk() + "/thumb/" + detail.getProfile_picture();
    //Toast.makeText(getContext(),url,Toast.LENGTH_LONG).show();
    GlideApp.with(image.getContext())
            .load(url)
            .placeholder(R.drawable.ic_avtar_male)
            .into(image);
}

这是我的logcat崩溃报告

Process: com.ATG.World, PID: 24491
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.Resources android.support.v4.app.FragmentActivity.getResources()' on a null object reference
    at com.ATG.World.fragments.ArticleDetailFragment2.setupPostUserImage(ArticleDetailFragment2.java:316)
    at com.ATG.World.fragments.ArticleDetailFragment2.setData(ArticleDetailFragment2.java:301)
    at com.ATG.World.fragments.ArticleDetailFragment2$1.onResponse(ArticleDetailFragment2.java:176)
    at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:71)
    at android.os.Handler.handleCallback(Handler.java:898)
    at android.os.Handler.dispatchMessage(Handler.java:107)
    at android.os.Looper.loop(Looper.java:198)
    at android.app.ActivityThread.main(ActivityThread.java:6716)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
12-21 19:38:17.829 24491-24491/com.ATG.World I/Process: Sending signal. PID: 24491 SIG: 9

我应该怎么做才能解决此异常？

Answer 1

我没有发表评论的声誉，所以我必须写答案。看起来您的片段未附加到活动，因此方法getActivity（）返回null。看看这个答案可能会很有用getActivity() returns null in Fragment function

getResource方法中的nullpointerexception

1 个答案: