Basic Android Program 10

Question 10: Write a program to display all the subjects of sixth semester using Auto Complete Text View.

Download hole Program / Project code, by clicking following link:

go2collage/Basic-Android-Program-10 (github.com)

How to create AutoCompleteTextView field in XML?

To create an AutoCompleteTextView field in XML, you can use the following steps:

1. Open the XML file where you want to add the AutoCompleteTextView field.
   
2. Add the <AutoCompleteTextView> tag to create the AutoCompleteTextView field.
   
3. Set the android:id attribute to a unique ID for the AutoCompleteTextView field.
   


4. Set the android:layout_width and android:layout_height attributes to specify the width and height of the field.
5. Set the android:completionThreshold attribute to specify the minimum number of characters that must be typed before the AutoCompleteTextView starts suggesting completions.
6. Set the android:completionHint attribute to specify a hint text that appears below the AutoCompleteTextView when it is used to display a list of suggestions (optional).
7. Set the android:inputType attribute to specify the type of input expected, such as text or phone number.
   


8. Set the android:imeOptions attribute to specify additional options for the input method editor (IME), such as the action button to display on the keyboard.
   


9. Set the android:textColor attribute to specify the color of the text in the field.
10. Set the android:textSize attribute to specify the size of the text in the field.
    


11. Set the android:hint attribute to specify a hint text that appears in the field when it is empty.

Here's an example XML code to create an AutoCompleteTextView field:

<AutoCompleteTextView
    android:id="@+id/autoCompleteTextView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:completionThreshold="1"
            android:completionHint="Search for a city"
            android:inputType="text"
            android:imeOptions="actionSearch"
            android:textColor="#000000"
            android:textSize="16sp"
            android:hint="Enter city name" />

This will create an AutoCompleteTextView field with a unique ID, width and height set to match_parent and wrap_content respectively, a minimum completion threshold of 1 character, a completion hint of "Search for a city", input type set to text, IME option set to actionSearch, text color set to black, text size set to 16sp and a hint text of "Enter city name". You can customize these attributes based on your requirements.

Programming Code:

Following code write in: MainActivity.java

package com.go2collage.practical_10;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

    private AutoCompleteTextView autoCompleteTextView;
    private String search_engine[] = {"RDBMS","Programming with Python", "Capstone Project", "Web Application Development", "Data Structure",
                                        "Programming with C", "Entrepreneurship Development", "Advance Java", "Object Oriented Programming with C++"};

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

        autoCompleteTextView = findViewById(R.id.autoCompleteTxt);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, search_engine);
        autoCompleteTextView.setThreshold(2);
        autoCompleteTextView.setAdapter(adapter);

    }
}

Following code write in: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
    tools:context=".MainActivity"
    android:layout_margin="20dp">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/logoTxt"
        android:text="go2collage"
        android:textAlignment="center"
        android:textSize="24sp"
        android:textStyle="bold"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        android:layout_marginTop="20dp"
        android:layout_marginBottom="50dp"
        app:layout_constraintTop_toTopOf="parent"
        tools:ignore="HardcodedText" />

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Sixth Semester Subjects"
        android:id="@+id/nameTxt"
        android:textStyle="bold"
        android:textSize="20sp"
        android:textColor="@color/black"
        android:layout_marginBottom="25dp"
        android:layout_below="@+id/logoTxt"
        android:textAlignment="center"
        tools:ignore="HardcodedText" />

    <AutoCompleteTextView
        android:id="@+id/autoCompleteTxt"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@id/nameTxt"
        android:hint="Enter Subject name"
        android:textColor="@color/black"
        android:textColorHint="#78909C"
        android:textSize="20sp"
        tools:ignore="HardcodedText" />

</RelativeLayout>

Output: