AutoCompleteTextView, subclass of EditText with Auto-complete function

AutoCompleteTextView is a subclass of EditText that shows completion suggestions automatically while the user is typing.


To implement AutoCompleteTextView in your app:

Add the AutoCompleteTextView to your layout:

    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="20dp"
    android:orientation="vertical"
    tools:context="com.blogspot.android_er.androidedittextchanged.MainActivity">

            android:id="@+id/title"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold"/>

            android:id="@+id/autocompletetextview"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content" />

Edit res/values/strings.xml to add array that contains all text suggestions.

    AndroidEditTextChanged
    
        January
        February
        March
        April
        May
        June
        July
        August
        September
        October
        November
        December
    

Set adapter using the string array for the AutoCompleteTextView

package com.blogspot.android_er.androidedittextchanged;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;

public class MainActivity extends AppCompatActivity {

    AutoCompleteTextView autoCompleteTextView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        autoCompleteTextView =
                (AutoCompleteTextView)findViewById(R.id.autocompletetextview);

        String[] suggestion = getResources().getStringArray(R.array.suggestion);
        ArrayAdapter adapter =
                new ArrayAdapter(this,
                        android.R.layout.simple_list_item_1, suggestion);
        autoCompleteTextView.setAdapter(adapter);

    }

}