Implement interactive DialogFragment

This example modify from last example of "Create DialogFragment with AlertDialog.Builder", to implement interactive DialogFragment. Something sent from main activity to DialogFragment, and something editable in DialogFragment, and something sent from DialogFragment back to main activity.


MainActivity.java

package com.blogspot.android_er.androiddialogfragment;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {

    EditText inputTextField;

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

        inputTextField = (EditText)findViewById(R.id.inputtext);
        Button btnOpen = (Button)findViewById(R.id.opendialog);
        btnOpen.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                showDialog();
            }
        });
    }


    void showDialog() {
        FragmentTransaction ft = getFragmentManager().beginTransaction();
        Fragment prev = getFragmentManager().findFragmentByTag("dialog");
        if (prev != null) {
            ft.remove(prev);
        }
        ft.addToBackStack(null);

        String inputText = inputTextField.getText().toString();

        DialogFragment newFragment = MyDialogFragment.newInstance(inputText, inputTextField);
        newFragment.show(ft, "dialog");

    }

    public static class MyDialogFragment extends DialogFragment {

        String mText;
        static EditText backTextField;

        static MyDialogFragment newInstance(String text, EditText editText) {
            backTextField = editText;
            MyDialogFragment f = new MyDialogFragment();

            Bundle args = new Bundle();
            args.putString("text", text);
            f.setArguments(args);

            return f;
        }

        @Override
        public Dialog onCreateDialog(Bundle savedInstanceState) {
            mText = getArguments().getString("text");

            //create custom LinearLayout programmatically
            LinearLayout layout = new LinearLayout(getActivity());
            layout.setLayoutParams(new LinearLayout.LayoutParams(
                    LinearLayout.LayoutParams.MATCH_PARENT,
                    LinearLayout.LayoutParams.WRAP_CONTENT));
            layout.setOrientation(LinearLayout.VERTICAL);

            final EditText editField = new EditText(getActivity());
            editField.setHint("type something");
            Button btnAccept = new Button(getActivity());
            btnAccept.setText("Accept");
            final EditText textField = new EditText(getActivity());
            btnAccept.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    textField.setText(editField.getText().toString());
                }
            });

            layout.addView(editField);
            layout.addView(btnAccept);
            layout.addView(textField);

            return new AlertDialog.Builder(getActivity())
                    .setIcon(R.mipmap.ic_launcher)
                    .setTitle("Alert Dialog")
                    .setMessage(mText)
                    .setPositiveButton("OK",
                            new DialogInterface.OnClickListener() {
                                public void onClick(DialogInterface dialog, int whichButton) {
                                    Toast.makeText(getActivity(),
                                            textField.getText(),
                                            Toast.LENGTH_LONG).show();
                                    backTextField.setText(textField.getText());
                                }
                            }
                    )
                    .setNegativeButton("Cancel", null)
                    .setView(layout)
                    .create();
        }

    }
}

layout/activity_main.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:layout_width="match_parent"
    android:layout_height="match_parent"
    android:padding="16dp"
    android:orientation="vertical"
    tools:context=".MainActivity"
    android:background="#808080">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/inputtext"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Type something"/>
    <Button
        android:id="@+id/opendialog"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Open DialogFragment"
        android:textAllCaps="false"/>

</LinearLayout>