Android Tutorial
Android Widgets
Activity and Intents
Android Fragments
- android-fragments
Android Menu
Android Service
- android-service
Android AlarmManager
- android-alarmmanager
Android Storage
Android SQLite
- sqlite-tutorial
- sqlite-spinner
XML and JSON
Android Multimedia
Android Speech
- texttospeech1
- texttospeech2
Android Telephony
Android Device
Camera Tutorial
- camera-tutorial
Sensor Tutorial
- sensor-tutorial
Android Graphics
- android-graphics
Android Animation
- android-animation
Android Web Service
- android-web-service
Google Map
Adding Ads
Android Examples
Android Social
Android Versions
Android Misc
Android Interview
- interview-questions

Android EditText with TextWatcher (Searching data from ListView)

Android EditText is a subclass of TextView. EditText is used for entering and modifying text. While using EditText width, we must specify its input type in inputType property of EditText which configures the keyboard according to input.

EditText uses TextWatcher interface to watch change made over EditText. For doing this, EditText calls the addTextChangedListener() method.

Methods of TextWatcher

beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3): It is executed before making any change over EditText.
onTextChanged(CharSequence cs, int arg1, int arg2, int arg3): It is executed while making any change over EditText.
afterTextChanged(Editable arg0): It is executed after change made over EditText.

Example of EditText with TextWatcher()

In this example, we will implement EditText with TextWatcher to search data from ListView.

activity_main.xml

Create an activity_main.xml file in layout folder containing EditText and ListView.

File: activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.test.searchfromlistview.MainActivity">
			
    <EditText
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/editText"
        android:inputType="text"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentRight="true"
        android:layout_alignParentEnd="true" />

    <ListView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/listView"
        android:layout_below="@+id/editText"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />
</RelativeLayout>

Create another file list_item.xml in layout folder which contains data of ListView.

list_item.xm

File: list_item.xml

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

<TextView android:id="@+id/product_name"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:padding="10dip"
    android:textSize="16dip"
    android:textStyle="bold"/>
</LinearLayout>

Activity class

Activity class

package com.example.test.searchfromlistview;

import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.support.v7.app.AppCompatActivity;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    private ListView lv;
    private EditText editText;
    private ArrayAdapter<String> adapter;

    private String products[] = {"Apple", "Banana","Pinapple", "Orange", "Papaya", "Melon",
            "Grapes", "Water Melon","Lychee", "Guava", "Mango", "Kivi"};
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        lv = (ListView) findViewById(R.id.listView);
        editText = (EditText) findViewById(R.id.editText);
        adapter = new ArrayAdapter<String>(this, R.layout.list_item, R.id.product_name, products);
        lv.setAdapter(adapter);

        editText.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
                adapter.getFilter().filter(cs);
            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2, int arg3) {
                Toast.makeText(getApplicationContext(),"before text change",Toast.LENGTH_LONG).show();
            }

            @Override
            public void afterTextChanged(Editable arg0) {
                Toast.makeText(getApplicationContext(),"after text change",Toast.LENGTH_LONG).show();
            }
        });
    }
}

Output

Next TopicAndroid Life Cycle of Activity

← prev next →

Hot Tutorials

Contact US

Email:[email protected]

EditText with TextWatcher

10/30

Android Tutorial

Android Widgets

Activity and Intents

Android Fragments

Android Menu

Android Service

Android AlarmManager

Android Storage

Android SQLite

XML and JSON

Android Multimedia

Android Speech

Android Telephony

Android Device

Camera Tutorial

Sensor Tutorial

Android Graphics

Android Animation

Android Web Service

Google Map

Adding Ads

Android Examples

Android Social

Android Versions

Android Misc

Android Interview