How to reset the whole View by clicking the delete Button

Question

I have made a custom View which contains an ImageView, a TextView and a delete Button.
I want to reset the particular View when I click the delete Button associated with it.
Please tell how to implement this.

Here is my MainActivity.java

package com.khurana.nikhil.list1;

import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.LinearLayout;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class MainActivity extends ActionBarActivity {
ListView lv;
TextView tv1, tv2;
View v1;
public String[] s = {"nikhil", "mukul", "kunal"};
public int[] img = {R.drawable.rty, R.drawable.sf, R.drawable.rty};

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ListView lv = (ListView) findViewById(R.id.listView);


    CustomAdapter cad = new CustomAdapter(MainActivity.this, s, img);
    lv.setAdapter(cad);


    lv.setOnItemClickListener(new AdapterView.OnItemClickListener()
    {

        public void onItemClick(AdapterView<?> parent,View v,int position,long id)
        {
            Toast.makeText(MainActivity.this,"You clicked "+s[position],Toast.LENGTH_SHORT).show();

        }

    });


}
}

Here is CustomAdapter.java

package com.khurana.nikhil.list1;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;

public class CustomAdapter extends ArrayAdapter<String>{


Context c1;
String s1[];
int s2[];
CustomAdapter(Context c,String s[],int s3[])
{
    super(c,R.layout.tcustom,s);
    this.c1=c;
    this.s1=s;
    this.s2=s3;



}

public View getView(int position,View v,ViewGroup parent)
{
    LayoutInflater li=(LayoutInflater) c1.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

     v=li.inflate(R.layout.tcustom,null);
    TextView tv=(TextView)v.findViewById(R.id.textView);
    ImageView im=(ImageView)v.findViewById(R.id.imageview);
    tv.setText(s1[position]);
    im.setImageResource(s2[position]);
    Button bt=(Button)v.findViewById(R.id.button);
    return v;
}
}

score 2 · Answer 1 · answered Jun 17 '15 at 15:18

2

((LinearLayout)yourView.getParent()).removeView(yourView);

or you can call from the layout directly

yourRelativeLayout.removeView(yourView)

answered Jun 17 '15 at 15:18

Jason Portnoy

757
8
23

score 1 · Accepted Answer · edited May 23 '17 at 12:16

I would recommend to use an ArrayList instead of a String[] in your Adapter class. It makes it a lot easier to delete or edit a View and the associated data behind it. I used this post to convert your String[] to an ArrayList, delete the item and convert back to String[].

This should work on button click:

In your Adapter class:

public View getView(int position,View v,ViewGroup parent)
{
    LayoutInflater li=(LayoutInflater) c1.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    v=li.inflate(R.layout.tcustom,null);
    TextView tv=(TextView)v.findViewById(R.id.textView);
    ImageView im=(ImageView)v.findViewById(R.id.imageview);
    tv.setText(s1[position]);
    im.setImageResource(s2[position]);

    Button bt=(Button)v.findViewById(R.id.button);
    bt.setTag(position); //important so we know which item to delete on button click

    bt.setOnClickListener(new View.OnClickListener() {
     public void onClick(View v)
      {
        int positionToRemove = v.getTag(); //get the position of the view to delete stored in the tag
        removeItem(positionToRemove); //remove the item
      } 
    });

    return v;
}

public void removeItem(int position){
 //convert array to ArrayList, delete item and convert back to array
  ArrayList<String> a = new ArrayList<>(Arrays.asList(s1));
  a.remove(i);
  strings = new String[a.size()];
  s1= a.toArray(strings);
  notifyDataSetChanged(); //refresh your listview based on new data
}

 @Override
 public int getCount() {
   return s1.length;
 }

 @Override
 public String getItem(int position) {
   return s1[position];
 }

.java.lang.ArrayIndexOutOfBoundsException: length=2; index=2 at com.khurana.nikhil.list1.CustomAdapter.getView(CustomAdapter.java:45) — Nikhil Khurana, Jun 17 '15 at 15:50
I added 2 functions you need. Without them your adapter doesn't know the size of your array has changed. — Frank D., Jun 17 '15 at 17:31

score 0 · Answer 3 · answered Jun 17 '15 at 15:21

0

View visibility to GONE will not delete your view from memory as well. Please be specific, do you want to retain your view for future?

answered Jun 17 '15 at 15:21

Ashutoshg

157
1
7

Do you want to remove data from List or want to remove view from activity? – Ashutoshg Jun 17 '15 at 17:32
Frank's answer on top did both the tasks. – Nikhil Khurana Jun 17 '15 at 18:14

score 0 · Answer 4 · answered Jun 17 '15 at 15:24

If you are working in a listview you should call notifyDataSetChanged() the adapter. your getView() method can be like: action on button can be like this

Button bt=(Button)v.findViewById(R.id.button);
bt.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {

              s1 = ArrayUtils.remove(s1, position);
              s2 = ArrayUtils.remove(s2, position);
              notifyDataSetChanged();
            }
        });

score -2 · Answer 5 · edited May 23 '17 at 12:08

-2

If you want the view to disappear:

yourView.setVisibility(View.GONE);

EDIT: To get the parent view of the button: Android: Making changes to a button's parent view

edited May 23 '17 at 12:08

Community

1
1

answered Jun 17 '15 at 15:10

MD1948

292
2
13

That works on click of view.How do I set that functionality on click of button? – Nikhil Khurana Jun 17 '15 at 15:13
Set the onClickHandler on the button and see my edit – MD1948 Jun 17 '15 at 15:15
Be aware that setting the View visibility to GONE doesn't remove the data from the String[] array that's used to fill your listview. – Frank D. Jun 17 '15 at 15:16
Could you edit the getView() part in CustomAdapter for button funtionality? – Nikhil Khurana Jun 17 '15 at 15:18
@NikhilKhurana I've edited my answer so it should work on button click – Frank D. Jun 17 '15 at 15:32
This will just hide the view, if you were dealing with a lot of views this can become a memory hog – Jason Portnoy Jun 17 '15 at 17:34

How to reset the whole View by clicking the delete Button

5 Answers5