Error: Avoid non-default constructors in fragments: use a default constructor plus Fragment#setArguments(Bundle) instead [ValidFragment]

Question

I have a Fragment named Fragment_scheduled_newdetail and following is a constructor I am passing to this Fragment when launching, I get the following error:

Error:Error: Avoid non-default constructors in fragments: use a default constructor plus Fragment#setArguments(Bundle) instead [ValidFragment]

This seems to happen in Android Studio only (I am porting this project from Eclipse, no issue in Eclipse)

When I try to create a app in release mode

public Fragment_scheduled_newdetail(BlockInfo blockToDisplayT) {
    super();
    this.blockToDisplay = blockToDisplay;
}

enter image description here

If I generate the APK in debug mode, it works fine. (release mode will fail) enter image description here

see this link http://stackoverflow.com/questions/12062946/why-do-i-want-to-avoid-non-default-constructors-in-fragments — N J, Jun 04 '15 at 08:14
I would take the suggestion by Android Studio, forget the universal Eclipse (how could they know?). I'll post an answer for you. — The Original Android, Jun 04 '15 at 08:18

score 2 · Answer 1 · answered Sep 30 '16 at 11:14

I know the answer is already accepted, but for others who finding the most easiest way to avoid this . So just try this, it helps me out :

android {
    lintOptions {
        checkReleaseBuilds false
    }
}

Just write this n your build.gradle file, then sync the project and try making again signed apk.

The Original Android · Accepted Answer · 2015-06-04T08:49:05.687

1

This is a good strong suggestion by Android Studio. The reason is "constructors will not be called when the fragment is re-instantiated". Instead setArguments(Bundle) will. This is according to Google webpage @ Fragment. Do you have code for Bundle passing?

In Android framework, override methods like onCreate and onCreateView are reinstated, not constructors, like when user changes orientation.

edited Jun 04 '15 at 08:49

answered Jun 04 '15 at 08:21

The Original Android

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ok, yea trying to figure that out now ... passing bundle between Fragments. Will mark this as answer once i get it working – user1406716 Jun 04 '15 at 08:34
@user1406716, I added a comment in my post. It says "In Android framework, override methods like onCreate and onCreateView are reinstated, not constructors, like when user changes orientation" – The Original Android Jun 04 '15 at 08:49
@user1406716, How are you doing now with passing Bundles? – The Original Android Jun 04 '15 at 20:51

Error: Avoid non-default constructors in fragments: use a default constructor plus Fragment#setArguments(Bundle) instead [ValidFragment]

2 Answers2