Adding image to listview after listview item click

Question

I am developing an app which has a listView having 1 textView which displays the content and one imageView. What i want is, when i click the listView i want to set the imageView with the tick mark image which i have. Its working fine. Once i click the listView, the tick mark image is loaded on that listview item on which i clicked.

The problem arises when i scroll. When i scroll, i could see some other listview item down below has a tick mark loaded. not sure how the image was set on that position.

I have read somewhere that when the listView is scrolled, the view is refreshed. Is that causing the problem?

Can anyone help how can iresolve this? I want the image to be shown(loaded) on the listView item on which i clicked and now other listView item.

Below is the xml stating listView items

method_item.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="@android:color/white"
        android:text="This is a check box button which reacts upon the check that user clicks. I am testing it with the big string and checking how it looks" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_centerHorizontal="true" />

    <ImageView
        android:id="@+id/imageView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/imageView1"
        android:layout_alignParentRight="true"
        android:layout_marginRight="34dp" />

</RelativeLayout>

Below is the part of class snippet:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.method_list_main);

    final ListView list = (ListView)findViewById(R.id.listView1);

    adapter=new MethodLazyAdapter(this,ARRAY.preparationSteps,ARRAY.timeToPrepare,ARRAY.arrowValue,noOfSteps,list);
    list.setAdapter(adapter);

    list.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position,
                long id) {
            // TODO Auto-generated method stub
             RelativeLayout ll = (RelativeLayout) view;
              ImageView image = (ImageView)ll.findViewById(R.id.imageView2);

              if(tick[position]){
                  tick[position] = false;
                    image.setImageResource(0);                      
              }
              else{
                  tick[position] = true;
                      image.setImageResource(R.drawable.select_right);  
              }

            System.out.println("Position is: "+position);


        }
    });
}

Initially all tick[i] value is set to false.

Below is the getView function of adapter class

public View getView(final int position, View convertView, ViewGroup parent) {
    View vi=convertView;
    if(convertView==null)
        vi = inflater.inflate(R.layout.method_item, null);

    TextView text = (TextView)vi.findViewById(R.id.textView1);
    text.setText(preparationSteps\[position\]);
    return vi;
}

Can u please paste the code as i am not getting the desired output even after trying ViewHolder — shrikanth
– shrikanth, Commented Mar 8, 2013 at 20:14

AwadKab · Accepted Answer · 2013-03-08 20:06:00Z

Try this to get what you want

in public area add this variable

public SparseBooleanArray checked = new SparseBooleanArray();

then in onItemClick

list.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position,
                    long id) {
                boolean stat = checked.get(position, false);
                checked.put(position, !stat);
                adapter.setChecked();
                System.out.println("Position is: "+position);


            }
        });

and in Adapter Class

If adapter not sub class in activiy add variable in public area

private SparseBooleanArray checked = new SparseBooleanArray();

and add this method to class

public void setChecked(SparseBooleanArray ch){
    checked = ch;
   notifyDataSetChanged();
}

Or if it sub class use our cheked variable we defined it up

then in getView method

public View getView(final int position, View convertView, ViewGroup parent) {
    View vi=convertView;
    if(convertView==null)
        vi = inflater.inflate(R.layout.method_item, null);

    TextView text = (TextView)vi.findViewById(R.id.textView1);
    text.setText(preparationSteps\[position\]);

    ImageView image = (ImageView)vi.findViewById(R.id.imageView2);
    if(checked.get(position, false)){
          image.setImageResource(0);                      
    }
    else{
            image.setImageResource(R.drawable.select_right);  
    }
    return vi;
}

Please let me know if this help you.

This worked.. :) Thanks a ton. Its really appreciable. I was badly stuck with this. Hats off.

Community · Accepted Answer · 2017-05-23 11:43:49Z

0

Check out this post:

android - populating ListView with data from JSONArray

the reason for that is bacouse your are using your converted view wrong. follow the example code on the post i paste.

if you will inflate your row view every time this problem will disappear. but this implementation is not recommended.

edited May 23, 2017 at 11:43

CommunityBot

11 silver badge

answered Mar 8, 2013 at 19:01

Emil Adz

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