Button listener in list fragment in Android

Question

I am working on an Android application in which I am using my custom baseadapter and ListFragment. I want to make a thing that, if I press my button then it will show me any event like to startActivity, but when I am using it in baseAdapter it is giving me an error that "startActivity" is not in a scope of base adapter.

My code is given below.

My ListFragment where I am using base adapter:

    public class MyBaseAdapter extends BaseAdapter {

    ArrayList<ListData> myList = new ArrayList<ListData>();
    LayoutInflater inflater;
    Context context;
    Button btn;

    public MyBaseAdapter(Context context, ArrayList<ListData> myList) {
        this.myList = myList;
        this.context = context;

        inflater = LayoutInflater.from(this.context);    // only context can also be used
    }

    @Override
    public int getCount() {
        return myList.size();
    }

    @Override
    public ListData getItem(int position) {
        return myList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        MyViewHolder mViewHolder;


        if (convertView == null) {
            convertView = inflater.inflate(R.layout.layout_list_item, null);
            mViewHolder = new MyViewHolder();
            convertView.setTag(mViewHolder);
        } else {
            mViewHolder = (MyViewHolder) convertView.getTag();
        }

        mViewHolder.btn1 = detail(convertView, R.id.tvTitle);

            if(myList.get(position).getTitle().equals("Title 1")) {
                  btn.setVisibility(View.VISIBLE);
              }else{
                  btn.setVisibility(View.GONE);
              }
//error: The method startActivity(Intent) is undefined for the type MyBaseAdapter           
            startActivity(new Intent(context.getApplicationContext(), AlertMyNetwork.class));

             mViewHolder.btn1.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
  // toast is working perfectly                 
                    Toast.makeText(context, "adsadads", 1).show();
//error: The method startActivity(Intent) is undefined for the type click Listener
                    startActivity(new Intent(context.getApplicationContext(), AlertMyNetwork.class));

//          Intent i = new Intent(context, AlertMyNetwork.class);
//          startActivity(i);
//          
//          context.startActivity(context.getApplicationContext() , AlertMyNetwork.class);


                }
            });




        mViewHolder.tvTitle = detail(convertView, R.id.tvTitle, myList.get(position).getTitle());
        mViewHolder.tvDesc = detail(convertView, R.id.tvDesc, myList.get(position).getDescription());
        mViewHolder.ivIcon = detail(convertView, R.id.ivIcon, myList.get(position).getImgResId());

        return convertView;
    }

    // or you can try better way
    private TextView detail(View v, int resId, String text) {
        TextView tv = (TextView) v.findViewById(resId);
        tv.setText(text);
        return tv;
    }

    private Button detail(View v, int resId){

        btn = (Button) v.findViewById(R.id.button1);
        return btn;
    }

    private ImageView detail(View v, int resId, int icon) {
        ImageView iv = (ImageView) v.findViewById(resId);
        iv.setImageResource(icon); //

        return iv;
    }

    private class MyViewHolder {
        TextView tvTitle, tvDesc;
        ImageView ivIcon;
        Button btn1;
    }

}

My Base Adapter code:

public class MyBaseAdapter extends BaseAdapter {

    ArrayList<ListData> myList = new ArrayList<ListData>();
    LayoutInflater inflater;
    Context context;
    Button btn;

    public MyBaseAdapter(Context context, ArrayList<ListData> myList) {
        this.myList = myList;
        this.context = context;

        inflater = LayoutInflater.from(this.context);    // only context can also be used
    }

    @Override
    public int getCount() {
        return myList.size();
    }

    @Override
    public ListData getItem(int position) {
        return myList.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        MyViewHolder mViewHolder;


        if (convertView == null) {
            convertView = inflater.inflate(R.layout.layout_list_item, null);
            mViewHolder = new MyViewHolder();
            convertView.setTag(mViewHolder);
        } else {
            mViewHolder = (MyViewHolder) convertView.getTag();
        }

        mViewHolder.btn1 = detail(convertView, R.id.tvTitle);

            if(myList.get(position).getTitle().equals("Title 1")) {
                  btn.setVisibility(View.VISIBLE);
              }else{
                  btn.setVisibility(View.GONE);
              }

        mViewHolder.tvTitle = detail(convertView, R.id.tvTitle, myList.get(position).getTitle());
        mViewHolder.tvDesc = detail(convertView, R.id.tvDesc, myList.get(position).getDescription());
        mViewHolder.ivIcon = detail(convertView, R.id.ivIcon, myList.get(position).getImgResId());

        return convertView;
    }

    // or you can try better way
    private TextView detail(View v, int resId, String text) {
        TextView tv = (TextView) v.findViewById(resId);
        tv.setText(text);
        return tv;
    }

    private Button detail(View v, int resId){

        btn = (Button) v.findViewById(R.id.button1);
        return btn;
    }

    private ImageView detail(View v, int resId, int icon) {
        ImageView iv = (ImageView) v.findViewById(resId);
        iv.setImageResource(icon); //

        return iv;
    }

    private class MyViewHolder {
        TextView tvTitle, tvDesc;
        ImageView ivIcon;
        Button btn1;
    }

}

My XML code:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center_vertical"
    android:orientation="vertical"
    android:background="@android:color/white"
    android:padding="10dp">

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:text="Button" />

    <ImageView
        android:id="@+id/ivIcon"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/star1" />

    <LinearLayout
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:orientation="vertical">

        <TextView
            android:id="@+id/tvTitle"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="5dp"
            android:text="Title" />

        <TextView
            android:id="@+id/tvDesc"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:padding="5dp"
            android:text="Description" />
    </LinearLayout>

</LinearLayout>

@HimanshuAgarwal Can you please give me an example here for this. — Usman Khan
– Usman Khan, Commented Apr 21, 2015 at 10:44
update your code and show how and where are you calling startActivity — Himanshu Agarwal
– Himanshu Agarwal, Commented Apr 21, 2015 at 10:48
Try passing getActivity ().getApplicationcontext () in base adapter constructor instead of getBasecontext — amodkanthe
– amodkanthe, Commented Apr 21, 2015 at 10:51
@HimanshuAgarwal i have updated my code please check it out. I am facing a same problem here. — Usman Khan
– Usman Khan, Commented Apr 21, 2015 at 10:58

Himanshu Agarwal · Accepted Answer · 2015-04-21 11:09:00Z

1

Try context.startActivity(intent); in BaseAdapter Class

edited Apr 21, 2015 at 11:09

Himanshu Agarwal

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answered Apr 21, 2015 at 10:39

amodkanthe

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1 Comment

amodkanthe Over a year ago

also try passing getActivity ().getApplicationcontext () in base adapter constructor instead of getBasecontext()

Himanshu Agarwal · Accepted Answer · 2015-04-21 11:03:27Z

1

If you want to call startActivity from BaseAdapter then use below code:

context.startActivity(yourIntent);.

If you want to call inside your ListFragment then call it like this:

getActivity().startActivity(yourIntent);.

Try below code that will work fine in your BaseAdapter class

context.startActivity(new Intent(context.getApplicationContext(), AlertMyNetwork.class));

mViewHolder.btn1.setOnClickListener(new OnClickListener() {
     @Override
     public void onClick(View v) {         

          context.startActivity(new Intent(context.getApplicationContext(), AlertMyNetwork.class));

          //Intent i = new Intent(context, AlertMyNetwork.class);
          //context.startActivity(i);

          context.startActivity(context.getApplicationContext() , AlertMyNetwork.class);
    }
});

edited Apr 21, 2015 at 11:03

answered Apr 21, 2015 at 10:43

Himanshu Agarwal

4,6895 gold badges37 silver badges49 bronze badges

2 Comments

Usman Khan Over a year ago

it is giving me this error by calling this: The method startActivity(Intent) in the type Context is not applicable for the arguments (Class<AlertMyNetwork>)

Himanshu Agarwal Over a year ago

@UKhan try above code use context before startActivity

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