Creating the Autocomplete in Android

Autocomplete:-  


If you want that as you type the TextField it provide suggestions , you can use AutocompleteTextView which is subclass of EditText. To implement auto-complete, we specify the Adapter that provide suggestion.There are several kind of adapter is available but depending upon the where is data come form either array or data base.


In this example. 


(1) There is a  TextView .
(2) A Autocomplete EditText.

LAYOUT OF THE PROGRAM

We make it by Graphical Method:By default in Graphical Method it show Icon and Text in pop down menu.We can can select Show only Icon.

By drag and drop you make easily layout of the program once you make, the main.xml file auto generated.














 <RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="@string/fav"
         />

    <AutoCompleteTextView
        android:id="@+id/autoCompleteTextView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignRight="@+id/textView1"
        android:layout_below="@+id/textView1"
        android:layout_marginTop="18dp"
        android:ems="10"
         >

        <requestFocus />
    </AutoCompleteTextView>

</RelativeLayout>

Add item in array String fav_dish

After the adding item

Explanation:

Here is 

Hello, app_name,menu_settings and title_activity_main is default String

One is Text String that is entxt That will show inTextField when there is no text
One array  fav_dish
Six item is added 

package abh.example.autoexample;


import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;


public class MainActivity extends Activity {


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        String[] dish = getResources().getStringArray(R.array.fav_dish);
        ArrayAdapter<String> ada =  new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, dish);
        
          AutoCompleteTextView tv = (AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1);
                  tv.setAdapter(ada);
  
    }  
}


Expanation:-
 String[] dish = getResources().getStringArray(R.array.fav_dish)

Here we importing all xml item resources and storing them in dish array.R.array is  specific class that generate from the resources.R.array.itemname is the name of the field within the class which is know as static variable or static
    Now we are using Adapter. The purpose of an adapter is manage the data i.e. that hold all suggestion data and define the ID that is here is simple_list_item_1

ArrayAdapter<String> ada =  new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, dish);
        
 There is three parameter 
(1)this
(2)android.R.layout.simple_list_item_1
(3)dish

"this" the context class
 android.R.layout.simple_list_item_1.This layout define in Android There is number of inbuild android layout it will found Android SDK folder platform/<android-version>/data/res/layout
dish is array
The next final step is associate the Adapter with AutoCompleteTextView and setAdapter() method  with AutoCompleteTextView.


 Downlod apk file for this project