Create AlertDialog With Custom Layout Programmatically

How to create Create AlertDialog With Custom Layout Programmatically (Java)?

In this tutorial we will create AlertDialog with custom layout programmatically in Java using Android Studio IDE. We will create a button to show that AlertDialog and show output in Toast. You can also display this information anywhere such as TextView etc or save at some place.

Step 1: Create a new project OR Open your project

Step 2: Code

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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">

    <Button
        android:id="@+id/showAlertDialogBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Show Alert Dialog"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</android.support.constraint.ConstraintLayout>

MainActivity.java

package com.blogspot.devofandroid.myapplication;

import android.content.DialogInterface;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.TypedValue;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

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

        Button mShowAlertDialogBtn = findViewById(R.id.showAlertDialogBtn);
        mShowAlertDialogBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                showAlertDialog();
            }
        });
    }

    private void showAlertDialog() {
        AlertDialog.Builder mBuilder = new AlertDialog.Builder(this);
        LinearLayout mLayout         = new LinearLayout(this);
        TextView mTvMessage          = new TextView(this);
        final EditText mEtInput      = new EditText(this);

        mTvMessage.setText("Enter name:");
        mTvMessage.setTextSize(TypedValue.COMPLEX_UNIT_SP, 16f);
        mEtInput.setSingleLine();
        mLayout.setOrientation(LinearLayout.VERTICAL);
        mLayout.addView(mTvMessage);
        mLayout.addView(mEtInput);
        mLayout.setPadding(50, 40, 50, 10);

        mBuilder.setView(mLayout);

        mBuilder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                Toast.makeText(MainActivity.this, "Canceled", Toast.LENGTH_SHORT).show();
            }
        });
        mBuilder.setPositiveButton("Done", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialogInterface, int i) {
                String name = mEtInput.getText().toString();
                Toast.makeText(MainActivity.this, "Name entered: " + name, Toast.LENGTH_SHORT).show();
            }
        });

        mBuilder.create().show();
    }

}

Step 3: Run Project 

Output