Example of Auto Complete text in android

just drop auto-complete textview from widget to your layout or copy below code:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="fill_parent"

    android:layout_height="fill_parent"

    android:orientation="vertical" >

    <AutoCompleteTextView

        android:id="@+id/autoCompleteTextView1"

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

      >

        <requestFocus />

    </AutoCompleteTextView>

</LinearLayout>
 

Now open java file and paste below code 

package com.smr; //package name

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.AutoCompleteTextView;

import android.app.Activity;

public class MainActivity extends Activity {

      String values[]={"January", "July", "June", "Ravi","Ravinder", "Abhishek", "Abhinav", "Harkishore", "Hardev"};

      @Override

      protected void onCreate(Bundle savedInstanceState) {

            super.onCreate(savedInstanceState);

            setContentView(R.layout.activity_main);

            AutoCompleteTextView lv=(AutoCompleteTextView)findViewById(R.id.autoCompleteTextView1); 

//adapter will adapt the string and pass the string to lv object

            ArrayAdapter<?> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, values);

            lv.setAdapter(adapter);

            

      }

  }