How to check if android editText is empty?

This example demonstrates how do I check if android editText is empty.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/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"    tools:context=".MainActivity">    <EditText       android:id="@+id/editText"       android:layout_width="match_parent"       android:layout_height="wrap_content"       android:layout_centerHorizontal="true"       android:textSize="12sp"       android:layout_marginTop="45dp"/>    <Button       android:id="@+id/buttonCheck"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="Check Edit"       android:layout_centerInParent="true"       android:layout_marginTop="25sp"       android:layout_below="@id/editText"/> </RelativeLayout>

Step 3 − Add the following code to src/MainActivity.java

import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.text.TextUtils; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast; public class MainActivity extends AppCompatActivity {    EditText editText;    Button button;    @Override    protected void onCreate(Bundle savedInstanceState) {       super.onCreate(savedInstanceState);       setContentView(R.layout.activity_main);       editText = findViewById(R.id.editText);       button = findViewById(R.id.buttonCheck);       button.setOnClickListener(new View.OnClickListener() {          @Override          public void onClick(View v) {             if (TextUtils.isEmpty(editText.getText().toString())){                Toast.makeText(MainActivity.this, "Empty                   field not allowed!",                   Toast.LENGTH_SHORT).show();             }else {                Toast.makeText(MainActivity.this,                   "Proceed..",                   Toast.LENGTH_SHORT).show();             }          }       });    } }

Step 4 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?> <manifest    xmlns:android="http://schemas.android.com/apk/res/android"    package="app.com.sample">    <application       android:allowBackup="true"       android:icon="@mipmap/ic_launcher"       android:label="@string/app_name"       android:roundIcon="@mipmap/ic_launcher_round"       android:supportsRtl="true"       android:theme="@style/AppTheme">       <activity android:name=".MainActivity">          <intent-filter>             <action                android:name="android.intent.action.MAIN" />             <category                android:name="android.intent.category.LAUNCHER" />          </intent-filter>       </activity>    </application> </manifest>

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −