CODEWITHSUNDEEP
androidlistview
Gishantha Darshana
Gishantha Darshana

Reputation: 163

start activity when custom listview button clicked

i am developing a app that calls a web service and load the results to a list view. actually my list view has two buttons and one image view. i have use a custom list adapter class which is extends BaseAdapter. for now i just use Toast messages to identify the click events on the list items [ buttons and background of the list]. i want to start a new activity when i press a button in a list view..how can i do that ? i tried to call start activity method in onclick listener. but it didn't work..

here is my Adapter Class

public class NewsRowAdapter extends BaseAdapter  {

private Context mContext;

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


private Activity activity;
private static LayoutInflater inflater=null;
private ArrayList<HashMap<String, String>> data;
int resource;
    //String response;
    //Context context;
    //Initialize adapter
    public NewsRowAdapter(Activity act, int resource,ArrayList<HashMap<String, String>> d) {
        super();
        this.resource=resource;
        this.data = d;
        this.activity = act;
        inflater = (LayoutInflater)activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    }





@Override
public View getView(final int position, View convertView, final ViewGroup parent) {


    View vi = convertView;
    if(convertView==null)
        vi = inflater.inflate(R.layout.row,null);

        TextView firstname = (TextView) vi.findViewById(R.id.fname);
        TextView lastname = (TextView) vi.findViewById(R.id.lname);
        TextView startTime = (TextView) vi.findViewById(R.id.stime);
        TextView endTime = (TextView) vi.findViewById(R.id.etime);
        TextView date = (TextView) vi.findViewById(R.id.blank);
        ImageView img = (ImageView) vi.findViewById(R.id.list_image);


        HashMap<String, String> song = new HashMap<String, String>();
        song =data.get(position);

        firstname.setText(song.get(MainActivity.TAG_PROP_FNAME));
        lastname.setText(song.get(MainActivity.TAG_PROP_LNAME));
        startTime.setText(song.get(MainActivity.TAG_STIME));
        endTime.setText(song.get(MainActivity.TAG_ETIME));
        date.setText(song.get(MainActivity.TAG_DATE));
        //imageLoader.DisplayImage(song.get(CustomizedListView.KEY_THUMB_URL), img);

        Button accept = (Button) vi.findViewById(R.id.button1);
        accept.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                final int x = (int) getItemId(position);
                Toast.makeText(parent.getContext(),"you clicked "+ x , Toast.LENGTH_SHORT).show();

                //Intent zoom=new Intent(mContext, Profile.class);
                //mContext.startActivity(zoom);
                //v.getContext().startActivity(zoom);

            }
        });

        vi.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                Toast.makeText(parent.getContext(), "view clicked: " , Toast.LENGTH_SHORT).show();



                Intent intent = new Intent(mContext,Profile.class);
                mContext.startActivity(intent);


            }
        });

        return vi;


}



@Override
public int getCount() {
    // TODO Auto-generated method stub
    return data.size();
}



@Override
public Object getItem(int possision) {
    // TODO Auto-generated method stub
    return possision;
}



@Override
public long getItemId(int possision) {
    // TODO Auto-generated method stub
    return possision;
}
}

StackTrace:

11-27 11:50:20.812: E/AndroidRuntime(3974): FATAL EXCEPTION: main 
11-27 11:50:20.812: E/AndroidRuntime(3974): java.lang.NullPointerException 
11-27 11:50:20.812: E/AndroidRuntime(3974): at android.content.ComponentName.<init>(ComponentName.java:75)
11-27 11:50:20.812: E/AndroidRuntime(3974): at android.content.Intent.<init>(Intent.java:3301)
11-27 11:50:20.812: E/AndroidRuntime(3974): at com.jsonlist.jsonlist.NewsRowAdapter$2.onClick(NewsRowAdapter.java:103)

Upvotes: 1

Views: 8588

Answers (3)

Fabricio
Fabricio

Reputation: 3297

Please check if your activity is declared in AndridManifest.xml

Upvotes: 0

Shijil
Shijil

Reputation: 2246

change constructor

 public NewsRowAdapter(Context ctx, int resource,ArrayList<HashMap<String, String>> d) {
    super();
    this.resource=resource;
    this.data = d;
    this.mContext = ctx;
    inflater = (LayoutInflater)mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

}

and delete first constructor

public NewsRowAdapter (Context ctx) {
mContext = ctx;

}

Upvotes: 3

Techfist
Techfist

Reputation: 4344

Just use this instead. 

Intent zoom=new Intent(parent.getContext(), Profile.class);   
parent.getContext().startActivity(zoom);

Upvotes: 3

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