import android.app.Activity;

import android.app.AlertDialog;

import android.app.Dialog;

import android.content.DialogInterface;

import android.os.Bundle;

import android.support.v4.app.DialogFragment;

import android.view.KeyEvent;

import android.view.inputmethod.EditorInfo;

import android.widget.EditText;

import android.widget.TextView;

import android.widget.TextView.OnEditorActionListener;

/**

 * A generic text input dialog with configurable text. The Activity must implement the callback

 * interface TextInputDialogListener, which will be called by the dialog if it is submitted or cancelled.

 */

public class TextInputDialog extends DialogFragment {

	private static final String BUNDLE_DIALOG_ID = "dialogId";

	private static final String BUNDLE_TITLE_TEXT = "title";

	private static final String BUNDLE_MESSAGE_TEXT = "message";

	private static final String BUNDLE_HINT_TEXT = "hint";

	private int dialogId, titleText, messageText, hintText;

	private TextInputDialogListener listener;

	public interface TextInputDialogListener {

		void onTextInputDialogSubmitted(int dialogId, String text);

		void onTextInputDialogCancelled(int dialogId);

	}

	/**

	 * The dialogId is only used for passing back to the callback on the activity, the

	 * other parameters are text resource IDs. Pass 0 for any of them to not use this

	 * text.

	 */

	public TextInputDialog(int dialogId, int titleText, int messageText, int hintText) {

		this.dialogId = dialogId;

		this.titleText = titleText;

		this.messageText = messageText;

		this.hintText = hintText;

	}

	public TextInputDialog() {

		// Only for reflection-based instantiation by the framework

	}

	@Override

	public void onAttach(Activity activity) {

		super.onAttach(activity);

		try {

			listener = (TextInputDialogListener) activity;

		} catch(ClassCastException e) {

			throw new ClassCastException("Activity " + activity + " must implement TextInputDialogListener to use TextInputDialog.");

		}

	}

	@Override

	public void onDetach() {

		super.onDetach();

		listener = null;

	}

	@Override

	public Dialog onCreateDialog(Bundle savedInstanceState) {

		if(savedInstanceState != null) {

			dialogId = savedInstanceState.getInt(BUNDLE_DIALOG_ID, dialogId);

			titleText = savedInstanceState.getInt(BUNDLE_TITLE_TEXT, titleText);

			messageText = savedInstanceState.getInt(BUNDLE_MESSAGE_TEXT, messageText);

			hintText = savedInstanceState.getInt(BUNDLE_HINT_TEXT, hintText);

		}

		final EditText editText = new EditText(getActivity());

		AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());

		if(titleText != 0) {

			builder.setTitle(titleText);

		}

		if(messageText != 0) {

			builder.setTitle(messageText);

		}

		if(hintText != 0) {

			editText.setHint(hintText);

		}

		editText.setId(android.R.id.text1);

		editText.setImeOptions(EditorInfo.IME_ACTION_DONE);

		editText.setSingleLine();

		builder.setView(editText);

		builder.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {

			public void onClick(DialogInterface dialog, int which) {

				dialog.cancel();

			}

		});

		editText.setOnEditorActionListener(new OnEditorActionListener() {

			public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {

				listener.onTextInputDialogSubmitted(dialogId, v.getText().toString());

				return true;

			}

		});

		builder.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {

			public void onClick(DialogInterface dialog, int which) {

				listener.onTextInputDialogSubmitted(dialogId, editText.getText().toString());

			}

		});

		return builder.create();

	}

	@Override

	public void onSaveInstanceState(Bundle icicle) {

		super.onSaveInstanceState(icicle);

		icicle.putInt(BUNDLE_DIALOG_ID, dialogId);

		icicle.putInt(BUNDLE_TITLE_TEXT, titleText);

		icicle.putInt(BUNDLE_MESSAGE_TEXT, messageText);

		icicle.putInt(BUNDLE_HINT_TEXT, hintText);

	}

	@Override

	public void onCancel(DialogInterface dialog) {

		super.onCancel(dialog);

		listener.onTextInputDialogCancelled(dialogId);

	}

}