How to start an activity by click of image button of a List view?

Question

i have a list there is a image button in each item when i click on a image i have to start another Activity with intent

following are my code

my problem is i couldn't call startActivity() from custom adapter! !

in custom adapter's getView()

  holder.profilePicture.setOnClickListener(new OnClickListener() 
       { 
           public void onClick(View v) 
           {
               Log.d("OnImageButton","Clicked");
               Intent zoom=new Intent(AllProfile.getAppContext(), ImageZoom.class);
               int imageID=holder.profilePicture.getId();
               zoom.putExtra("ImageId", imageID);
               startActivity(zoom)  ; //This line raises error !      
                           }


       });

Use `Activity Context` with it, like `mContext.startActivity(zoom);`. — user370305, Jun 19 '13 at 11:45
Actually startActivity() is method of Context class. And you have written it on Adapter class's getView's Imageview's Click method so your IDE unable to find it. — user370305, Jun 19 '13 at 11:47
am getting an error like " FLAG_ACTIVITY_NEW_TASK requires" ! what should i do now ? — Mohan Raj, Jun 19 '13 at 11:48
`zoom.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);` put before start activity method. — user370305, Jun 19 '13 at 11:51

PX Developer · Accepted Answer · 2013-06-19T11:53:59.937

6

You should pass your context to your custom adapter when you create it:

public class MyAdapter extends BaseAdapter {
    private Context mContext;

    public MyAdapter (Context ctx) {
        mContext = ctx;
    }

    ...
}

And in getView use that context to start the Activity:

 holder.profilePicture.setOnClickListener(new OnClickListener() 
   { 
       public void onClick(View v) 
       {
           Log.d("OnImageButton","Clicked");
           Intent zoom=new Intent(mContext, ImageZoom.class);
           int imageID=holder.profilePicture.getId();
           zoom.putExtra("ImageId", imageID);
           mContext.startActivity(zoom)  ; //This line raises error !      
                       }


   });

When you create the Adapter in your Activity you should pass "this" as a parameter:

 mAdapter = new MyAdapter(this);

edited Jun 19 '13 at 11:53

answered Jun 19 '13 at 11:47

PX Developer

8,065
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am getting an error like " FLAG_ACTIVITY_NEW_TASK requires" ! what should i do now ? – Mohan Raj Jun 19 '13 at 11:50
1

I forgot something. When you create the intent, use mContext instead of AllProfile.getAppContext(). I'll edit the post to add it. Tell me if the error still happens. – PX Developer Jun 19 '13 at 11:53
mAdapter = new MyAdapter(this); where do i have to instantiate this ? in my onCreate()? – Mohan Raj Jun 19 '13 at 12:00
Depends on how you designed your Activity, but you can do it in onCreate, yes. – PX Developer Jun 19 '13 at 12:12

score 0 · Answer 2 · answered Jun 19 '13 at 11:54

0

have you tried this:

MainActivity.this.startActivity(zoom);

answered Jun 19 '13 at 11:54

The Badak

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2
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28

How to start an activity by click of image button of a List view?

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