How to use setTag and getTag with custom adapter

Question

I get stucked and I need help. I'm trying to use set and get Tag but i can't get how it works for this action:

• I'm using list view to show images loaded to extended adapter
• The custom Adapter inflate a layout with imageview_1, textview_1 and button_1
• On my principal activity, I have a "Public Void OnClickHandler" for button_1 and was configurated on layout with "android:onClick", so when button is clicked it do something
• When button_1 is clicked, I want to get the text from textview_1 from that specific view and then load a different image. I want to to this using get and set TAGS, so I need to do the reference with button_1 and imageview_1. here my snipped code. Thank you in advance

The custom Adapter

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ViewHolder holder = null;

    LayoutInflater mInflater = (LayoutInflater) 
        context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.itemstartsession, null);
        holder = new ViewHolder();

        holder.image = (WebView)convertView.findViewById(R.id.img_session);
        //holder.image.setTag(position);

        holder.code = (TextView)convertView.findViewById(R.id.code_item_session_text);
        //holder.code.setTag(position);


        holder.share=(ImageButton)convertView.findViewById(R.id.share_item_session_button);
        holder.share.setTag(position);

        convertView.setTag(holder);
    // Check if my setTag is ok for button and get the reference to get 
        //text from textview and the referece to webview, then I gonna load a url
    } else {

        holder=(ViewHolder)convertView.getTag();
    }

    StoreDataForBA storeItem= (StoreDataForBA) getItem(position);
    holder.image.loadUrl(storeItem.getImage());

        holder.code.setText(storeItem.getCode());

return convertView;
}

This is my getter and setter for data, very easy

public StoreDataForBA( String image, String code) {

    this.setImage(image);
    this.setCode(code);

}

public String getImage() {
    return image;
}

public void setImage(String image) {
    this.image = image;
}


public String getCode() {
    return code;
}

public void setCode(String code) {
    this.code = code;
}

My principal Activity snipped

public void shareOnClickHandler(View v) {
// plz here i need the code to get the text from textview and also get the 
// reference of the webview, so i can do something like
// StoreDataForBA data = (StoreDataForBA)v.getTag();
// image2.loadUrl("http://image2")..... I'm not sure, thank you
}

Answer 1

your code is little bit confusing, so I give you a sample

Sample Tag class

public class MyTag
{
   String  code;
   String  image;
   String  web_ref;

  public MyTag()
    {
     code=null;
     image=null;
     web_ref=null;
    }

    public MyTag(String cod,String img,String wref)
    {
      code=cod;
      image=img;
      web_ref=wref;
    }

}

you want to get this values when clicked on button right ? So put this tag class object as tag on button in getView of your custom adapter

MyTag myTag=new MyTag("code","image","web_ref");
holder.button.setTag(myTag);

since you get the view clicked as argument to the your function

public void shareOnClickHandler(View v) 
{

   myTag=(MyTag)v.getTag();
   text=myTag.code;
   image2.loadUrl("http://"+myTag.image);//..... I'm not sure, thank you
   webview.loadUrl(mytag.web_ref);
}

I think you get the idea, try to implement your code with this idea

Answer 2

You are very close to your answer. Just Follow the changes and complete your answer

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

        ViewHolder holder;

        if ((convertView == null) || (convertView.getTag() == null)) {
            LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = mInflater.inflate(R.layout.list_item, null);
            holder = new ViewHolder();
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        convertView.setTag(holder);

        return convertView;
    }

Answer 3

Answer 1:

What you want to do it:

above or right after this line: holder.code.setText(storeItem.getCode()); add the following: holder.share.setTag(storeItem.getCode());

and in the onClick:

public void shareOnClickHandler(View v) {
    String code = v.getTag().toString();
    // plz here i need the code to get the text from textview and also get the 
    // reference of the webview, so i can do something like
    // StoreDataForBA data = (StoreDataForBA)v.getTag();
    // image2.loadUrl("http://image2")..... I'm not sure, thank you
}

Or

Answer 2:

You may not need to use setTag and getTag if you do the following

1. Go to your xml and remove the onclick attribute from the button we are going to use it in the Java instead

2. Use the following getView

   @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder = null;

   LayoutInflater mInflater = (LayoutInflater) 
       context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
   
   if (convertView == null) {
       convertView = mInflater.inflate(R.layout.itemstartsession, null);
       holder = new ViewHolder();
       holder.image = (WebView)convertView.findViewById(R.id.img_session);
       holder.code = (TextView)convertView.findViewById(R.id.code_item_session_text);                  
       holder.share=(ImageButton)convertView.findViewById(R.id.share_item_session_button);
       convertView.setTag(holder);
   // Check if my setTag is ok for button and get the reference to get 
       //text from textview and the reference to webview, then I gonna load a url
   } else {
       holder=(ViewHolder)convertView.getTag();
   }
   
   final StoreDataForBA storeItem= (StoreDataForBA) getItem(position); // final to use inside click
   holder.image.loadUrl(storeItem.getImage());
   holder.code.setText(storeItem.getCode());
   final ViewHolder fh = holder; // it needs to be final to use inside of clicklistener
   holder.share.setOnClickListener(new OnClickListener() {
   
       @Override
       public void onClick(View v) {
           String text = holder.code.getText().toString(); // I hope that this is what you need.
           String text2 = storeItem.getCode(); //use either but I prefer this.
       }
   });
   return convertView;
   }