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How to Create a Custom AlertDialog in Android?

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Sometimes in AlertDialog, there is a need to get input from the user or customize it according to our requirements. So we create custom AlertDialogs. This post will show how to customize the AlertDialogs and take input from it.

Below is the step-by-step implementation of the above approach:

Step 1: Create an XML file custom_layout.xml

Add the below code in custom_layout.xml. This code defines the alert dialog box dimensions and adds an edit text to it.

XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:paddingLeft="20dp"
    android:paddingRight="20dp">
  
    <EditText
        android:id="@+id/editText"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />
</LinearLayout>

                    

Step 2: Add a Button in activity_main.xml

The button when clicked will show the AlertDialog box. 

XML

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/root"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">
  
    <Button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:onClick="showAlertDialogButtonClicked"
        android:text="Show Dialog" />
</LinearLayout>

                    

Step 3: Add custom_layout.xml file

Add custom_layout.xml in that activity in which you want to show a custom alert dialog here it is added in MainActivity.

Java

import android.os.Bundle;
import android.view.View;
import android.widget.EditText;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
  
public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
  
    public void showAlertDialogButtonClicked(View view) {
        // Create an alert builder
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Name");
  
        // set the custom layout
        final View customLayout = getLayoutInflater().inflate(R.layout.custom_layout, null);
        builder.setView(customLayout);
  
        // add a button
        builder.setPositiveButton("OK", (dialog, which) -> {
            // send data from the AlertDialog to the Activity
            EditText editText = customLayout.findViewById(R.id.editText);
            sendDialogDataToActivity(editText.getText().toString());
        });
        // create and show the alert dialog
        AlertDialog dialog = builder.create();
        dialog.show();
    }
  
    // Do something with the data coming from the AlertDialog
    private void sendDialogDataToActivity(String data) {
        Toast.makeText(this, data, Toast.LENGTH_SHORT).show();
    }
}

                    

Kotlin

import android.content.DialogInterface
import android.os.Bundle
import android.view.View
import android.widget.EditText
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
  
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }
  
    fun showAlertDialogButtonClicked() {
        // Create an alert builder
        val builder = AlertDialog.Builder(this)
        builder.setTitle("Name")
  
        // set the custom layout
        val customLayout: View = layoutInflater.inflate(R.layout.custom_layout, null)
        builder.setView(customLayout)
  
        // add a button
        builder.setPositiveButton("OK") { dialog: DialogInterface?, which: Int ->
            // send data from the AlertDialog to the Activity
            val editText = customLayout.findViewById<EditText>(R.id.editText)
            sendDialogDataToActivity(editText.text.toString())
        }
        // create and show the alert dialog
        val dialog = builder.create()
        dialog.show()
    }
  
    // Do something with the data coming from the AlertDialog
    private fun sendDialogDataToActivity(data: String) {
        Toast.makeText(this, data, Toast.LENGTH_SHORT).show()
    }
}

                    

Output:



Last Updated : 09 Feb, 2023
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