Create AletDialog for an activity in another class [CONTEXT]

Question

MainActivity [A]

    public class ViewActivity extends AppCompatActivity implements
        FilterDialogFragment.FilterListener,
        AffichageAdapter.OnAffichageSelectedListener {

   public void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_view);
           ButterKnife.bind(this);

Class [B]: i want to create a AlertDialogue when i click that its show in ViewActivity

public class AffichageAdapter extends FirestoreAdapter<AffichageAdapter.ViewHolder> {

AlertDialog.Builder Alert = new AlertDialog.Builder(What i Put here ! );

https://stackoverflow.com/questions/49492474/how-to-use-get-getapplicationcontext-in-adapter-class/49492494#49492494 — AskNilesh, Sep 19 '18 at 03:50

score 1 · Answer 1 · answered Sep 19 '18 at 03:14

1

YourClassName.this or getContext()

answered Sep 19 '18 at 03:14

Rubick

296
3
22

not work for me :'( – Halas Sep 19 '18 at 03:17
what is your idea btw? if you just want to open a custom dialog. try to read on `DialogFragment` – Rubick Sep 19 '18 at 03:20

score 0 · Answer 2 · answered Sep 19 '18 at 03:17

0

If you are trying to show alert from a different class in MainActivity A. You should pass getContext() parameter from MainActivity to that Class B's show alert function.

answered Sep 19 '18 at 03:17

Min Khant Lu

712
1
9
20

when i create a method to get Context and i call it in second class that write " No static" and when i turn getContext to ( public static context ) that write cannot referenced from static method – Halas Sep 19 '18 at 03:23

score 0 · Accepted Answer · answered Sep 19 '18 at 03:32

In AffichageAdapter class , you could declare a field like this:

private Context mContext;

public AffichageAdapter(Context context){
      this.mContext = context;//get context by constructor
}

and in ViewActivity

AffichageAdapter adapter = new AffichageAdapter(this);//"this" means ViewActivity, its a context.
xxx.setAdapter(adapter); // in some place.

then:

AlertDialog.Builder Alert = new AlertDialog.Builder(mContext);

Create AletDialog for an activity in another class [CONTEXT]

3 Answers3