在我的應用程序調用片段的方法我想打電話從其他fragments
fragment
方法,我下面寫代碼,但如果調用此方法告訴我下面的錯誤在logcat的和強制關閉應用程序。如何從其他片段
爲了顯示這兩個fragments
到activity
我使用TabLayout
和ViewPager
。
我回顧片段編碼:
public void getComments(final Context context) {
JsonObject requestBean = new JsonObject();
requestBean.addProperty("entityType", 1);
requestBean.addProperty("reviewType", 5);
requestBean.addProperty("reviewUserType", 2);
requestBean.addProperty("entityID", serialID);
requestBean.addProperty("celebrityId", 0);
requestBean.addProperty("pageIndex", 1);
requestBean.addProperty("pageSize", 10);
InterfaceApi api = ApiClient.getClient().create(InterfaceApi.class);
Call<CommentResponse> call = api.getComments(token, requestBean);
call.enqueue(new Callback<CommentResponse>() {
@Override
public void onResponse(Call<CommentResponse> call, Response<CommentResponse> response) {
if (response.body().getData() != null) {
if (response.body().getData().size() > 0) {
reviewMovieFrag_NoComment.setText("");
} else {
reviewMovieFrag_NoComment.setText(context.getResources().getString(R.string.noReviews));
SerialReview_CastProgress.setVisibility(View.GONE);
}
commentModel.clear();
commentModel.addAll(response.body().getData());
commentsListAdapter.notifyDataSetChanged();
reviewMovieFrag_newsCommentsRecyclerView.setAdapter(commentsListAdapter);
reviewMovieFrag_newsCommentsUserTypeText.setText(userTypeStr);
reviewMovieFrag_newsCommentsReviewTypeText.setText(reviewTypeStr);
reviewMovieFrag_Progress.setVisibility(View.GONE);
}
}
@Override
public void onFailure(Call<CommentResponse> call, Throwable t) {
reviewMovieFrag_Progress.setVisibility(View.GONE);
}
});
}
我想呼叫這種方法(getComments法)爲InfoFragment,爲此我寫這篇文章的代碼:
new MovieDetail_reviewFragment().getComments(getActivity());
但在LogCat中顯示給我這個錯誤:
java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.TextView.setText(java.lang.CharSequence)' on a null object reference
at com.test.app.Fragments.MovieDetailFragments.MovieDetail_reviewFragment$6.onResponse(MovieDetail_reviewFragment.java:301)
at retrofit2.ExecutorCallAdapterFactory$ExecutorCallbackCall$1$1.run(ExecutorCallAdapterFactory.java:68)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5349)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:908)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:703)
此行顯示錯誤:
reviewMovieFrag_NoComment.setText(context.getResources().getString(R.string.noReviews));
注意:各位版主和親愛的用戶,我知道這個錯誤空指針,但我不知道我該如何解決它?
我試圖解決這個問題,但我不能所以我問StackOverFlow。
請幫助我,不要給我負面的觀點或重複我的文章!
請幫助我,感謝所有
感謝我的兄弟,但沒有初始化實例!你能告訴我完整的代碼嗎?因爲我是業餘的。請 – Joke
你能幫我的弟弟嗎? – Joke
檢查更新的答案,讓我知道它的工作與否。 – Exigente05