MainActivity.java

package com.example.dialogbox;

import android.app.AlertDialog;
import android.app.Dialog;
import android.app.DialogFragment;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v7.app.ActionBarActivity;
import android.text.InputType;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.EditText;
import android.widget.LinearLayout;

public class MainActivity extends ActionBarActivity {

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

		if (savedInstanceState == null) {
			getSupportFragmentManager().beginTransaction()
					.add(R.id.container, new PlaceholderFragment()).commit();
		}
	}

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {

		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}

	@Override
	public boolean onOptionsItemSelected(MenuItem item) {
		// Handle action bar item clicks here. The action bar will
		// automatically handle clicks on the Home/Up button, so long
		// as you specify a parent activity in AndroidManifest.xml.
		int id = item.getItemId();
		if (id == R.id.action_settings) {
			return true;
		}
		return super.onOptionsItemSelected(item);
	}

	/**
	 * A placeholder fragment containing a simple view.
	 */
	public static class PlaceholderFragment extends Fragment {

		public PlaceholderFragment() {
		}

		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container,
				Bundle savedInstanceState) {
			View rootView = inflater.inflate(R.layout.fragment_main, container,
					false);
			return rootView;
		}
	}
	private String name="";
	private String artist="";
	public void showDialog(View view){
		LinearLayout layout = new LinearLayout(this);
		layout.setOrientation(LinearLayout.VERTICAL);

		final EditText nameField = new EditText(this);
		nameField.setHint("name");
		layout.addView(nameField);

		final EditText artistField = new EditText(this);
		artistField.setHint("artist");
		layout.addView(artistField);

		AlertDialog.Builder builder = new AlertDialog.Builder(this);
		builder.setTitle("Title");
		builder.setView(layout);
		builder.setPositiveButton("OK", new DialogInterface.OnClickListener() { 
		    @Override
		    public void onClick(DialogInterface dialog, int which) {
		        name = nameField.getText().toString();
		        artist = artistField.getText().toString();
		    }
		});
		builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
		    @Override
		    public void onClick(DialogInterface dialog, int which) {
		        dialog.cancel();
		    }
		});

		builder.create();
		builder.show();
	}
}