Use MultiAutoCompleteTextView in Android

Create Project

Create new project in Android Studio with steps as below:

Step 1: Input Project Name and Select Project Location

Step 2: Select SDK for Android App

Step 3: Select Default Activity for App

Step 4: Finish create project

Add Strings

Open res\values\strings.xml file and add new string as below:

<resources>
    <string name="app_name">Learn Android with Real Apps</string>
    <string name="search_category">Search Category...</string>
</resources>

Main Activity Layout

Open res\layout\activity_main.xml file and create layout as below:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <MultiAutoCompleteTextView
        android:id="@+id/multiAutoCompleteTextViewCategory"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

Main Activity Class

Add code to MainActivity.java file in android.demo.learnandroidwithrealapps package as below:

package android.demo.learnandroidwithrealapps;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.MultiAutoCompleteTextView;
import android.widget.Toast;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private MultiAutoCompleteTextView multiAutoCompleteTextViewCategory;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        loadData();
    }

    private void initView() {
        multiAutoCompleteTextViewCategory = findViewById(R.id.multiAutoCompleteTextViewCategory);
    }

    private void loadData() {
        List<String> categories = new ArrayList<String>();
        categories.add("Mobile");
        categories.add("Computer");
        categories.add("Tivi");
        categories.add("Laptop");
        categories.add("Desktop");
        multiAutoCompleteTextViewCategory.setThreshold(1);
        multiAutoCompleteTextViewCategory.setTokenizer(new MultiAutoCompleteTextView.CommaTokenizer());
        multiAutoCompleteTextViewCategory.setHint(getText(R.string.search_category));
        ArrayAdapter<String> categoryArrayAdapter = new ArrayAdapter<String>(this, android.R.layout.select_dialog_item, categories);
        multiAutoCompleteTextViewCategory.setAdapter(categoryArrayAdapter);
        multiAutoCompleteTextViewCategory.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                multiAutoCompleteTextViewCategory_onItemClick(adapterView, view, i, l);
            }
        });
    }

    private void multiAutoCompleteTextViewCategory_onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
        String category = adapterView.getItemAtPosition(i).toString();
        Toast.makeText(getApplicationContext(), category, Toast.LENGTH_SHORT).show();
    }

}

Structure of Project

Run App

Load MultiAutoCompleteTextView

Search Category with ti Keyword

Search Category with lap Keyword

Search Category with co Keyword

MultiAutoCompleteTextView with All Keywords

Use ItemClick Event of MultiAutoCompleteTextView