AutoComplete

If you want to get suggestions, when you type in an editable text field, you can do this via AutoCompleteTextView. It provides suggestions automatically when the user is typing. The list of suggestions is displayed in a drop-down menu from which the user can choose an item to replace the content of the edit box with.

              

  

First, we have to create AutoCompleTextView Field in MainActivity.xml

                            

                            <AutoCompleteTextView

                             android:id="@+id/autocomplete"

                             android:layout_width="250dp"

                             android:layout_height="40dp"

                             android:layout_below="@+id/imageView"

                             android:hint="Auto Complete Demo"

                             android:layout_marginTop="20dp"

                             android:layout_centerHorizontal="true"/>

After that, you have to define a reference of this textview in MainActivity.java

              AutoCompleteTextView textView;

              textView=(AutoCompleteTextView)findViewById(R.id.autoComplete);

After that, you need to specify the list of suggestions item to be displayed. You

can specify the list items as a string array in java or in string.xml

     String[] language=getResources().getStringArray(R.array.list_of_language);

The array adapter class is responsible for displaying the data as list in the suggestion box of the text field. The setAdapter method is used to set the adapter of the autoCompleteTextView.

Here is the Code of activity_main.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">

    <TextView

        android:id="@+id/textView1"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Auto Complete Demo"

        android:textSize="30sp"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="30dp"

        android:textStyle="bold"/>

    <TextView

        android:id="@+id/textView2"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:text="Android Is Simples"

        android:textSize="30sp"

        android:layout_centerHorizontal="true"

        android:layout_below="@+id/textView1"

        android:layout_marginTop="20dp"

        android:textStyle="bold"

        android:textColor="#fc1214"/>

    <ImageView

        android:id="@+id/imageView"

        android:layout_width="150dp"

        android:layout_height="150dp"

        android:src="@drawable/android"

        android:scaleType="centerCrop"

        android:contentDescription="@null"

        android:layout_below="@+id/textView2"

        android:layout_centerHorizontal="true"/>

    <AutoCompleteTextView

        android:id="@+id/autocomplete"

        android:layout_width="250dp"

        android:layout_height="40dp"

        android:layout_below="@+id/imageView"

        android:hint="Auto Complete Demo"

        android:layout_marginTop="20dp"

        android:layout_centerHorizontal="true"/>

    <MultiAutoCompleteTextView

        android:id="@+id/mutiAutoComplete"

        android:layout_width="250dp"

        android:layout_height="40dp"

        android:layout_below="@+id/autocomplete"

        android:layout_marginTop="20dp"

        android:layout_centerHorizontal="true"

        android:hint="Multi Auto Complete"/>

</RelativeLayout>

Here is the Code of  MainActivity.java

package com.mahesh.androidissimples.autocompletedemo;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.widget.ArrayAdapter;

import android.widget.AutoCompleteTextView;

import android.widget.MultiAutoCompleteTextView;

public class MainActivity extends AppCompatActivity {

    AutoCompleteTextView text;

    MultiAutoCompleteTextView text1;

    String[] languages={"Android","java","IOS","Swift","Asp","Web Application","JDBC"};

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        text= (AutoCompleteTextView) findViewById(R.id.autocomplete);

        text1= (MultiAutoCompleteTextView) findViewById(R.id.mutiAutoComplete);

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

        text.setAdapter(adapter);

        text.setThreshold(1);

        text1.setAdapter(adapter);

        text1.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());

    }

}