Create DialogFragment with AlertDialog.Builder

Last post show a example of DialogFragment, to create dialog view in onCreateView(). This example show how to create Dialog using AlertDialog.Builder() in onCreateDialog().

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.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);
        newFragment.show(ft, "dialog");

    }

    public static class MyDialogFragment extends DialogFragment {

        String mText;

        static MyDialogFragment newInstance(String text) {
            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");

            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(), "OK", Toast.LENGTH_LONG).show();
                                }
                            }
                    )
                    .setNegativeButton("Cancel", null)
                    .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>

Next:
- Implement interactive DialogFragment