如何从AutoCompleteTextView获取所选项目的数组索引？

Question

I have a user data lie names etc. coming from database which is being populated to AutoCompleteTextView but the position in ItemCLickListener is of the position as displayed in the auto complete list. I want the array index, and getting string from the adapter won't work because the same names can be there too.

Update

eg. In the database I have 4 entries abc, xyz, abc, pqrq along with some other data in other fields. These names are stored in an array.

So when I click abc, I want the other data to be fetched as well which could be done only if I know the array index of selected item.

Help!

Answer 1

Solution :

1. Customise the auto_complete_tv_adapter for its items.
2. Adapter list items will be model wich will hold the name with others data.
3. Any selected item you will have data model with all other values handy.

sample : https://www.androidcode.ninja/android-autocompletetextview-custom-arrayadapter-sqlite/

Answer 2

Instead of using an array of Strings , you should create an array with custom objects in it.

First, create a new class like this:

class CustomObject {

   public long id;
   public String name;

   public CustomObject(long id, String name) {
       this.id = id;
       this.name = name;
   }

   @Override
   public String toString() {
       return name;
   }
}

Then, you get data from your database, which will be Strings , instead of storing only a String you can also add a unique id to the array which we will we use later.

So, for example, you can fill the array like this:

 // this array should contain the items from your database, and a unique id
 final CustomObject[] items = { new CustomObject(0, "test"), new CustomObject(1, "test"),
        new CustomObject(2123123, "another name")};

Then make your AutoCompleteTextview click detector look like this:

    textView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
            CustomObject customObject = (CustomObject) parent.getItemAtPosition(position);
            int index = -1;
            for (int i = 0; i < items.length; i++) {
                if (items[i].id == customObject.id) {
                    index = i;
                    break;
                }
            }
            // now we have your index :)
            Toast.makeText(MainActivity.this, "Your index = " + index,
                    Toast.LENGTH_SHORT).show();
        }
    });

And that's it, there is the index you need. Note that for large arrays, this method will be slow.