Main.java Source code

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Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright 2012 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;

import android.text.Editable;
import android.text.TextWatcher;
import android.widget.EditText;

public class Main {
    /**
     * Expression for validating the url or ip-adress (ip v4/v6, dez/hex
     * possible)
     */
    public static final String UrlAndIPRegEx = "^((([hH][tT][tT][pP][sS]?|[fF][tT][pP])\\:\\/\\/)?([\\w\\.\\-]+(\\:[\\w\\.\\&%\\$\\-]+)*@)?"
            + "((([^\\s\\(\\)\\<\\>\\\\\\\"\\.\\[\\]\\,@;:]+)(\\.[^\\s\\(\\)\\<\\>\\\\\\\"\\.\\[\\]\\,@;:]+)*"
            + "(\\.[a-zA-Z]{2,4}))|((([01]?\\d{1,2}|2[0-4]\\d|25[0-5])\\.){3}([01]?\\d{1,2}|2[0-4]\\d|25[0-5])))"
            + "(\\b\\:(6553[0-5]|655[0-2]\\d|65[0-4]\\d{2}|6[0-4]\\d{3}|[1-5]\\d{4}|[1-9]\\d{0,3}|0)\\b)?((\\/[^\\/]"
            + "[\\w\\.\\,\\?\\'\\\\\\/\\+&%\\$#\\=~_\\-@]*)*[^\\.\\,\\?\\\"\\'\\(\\)\\[\\]!;<>{}\\s\\x7F-\\xFF])?)$";

    /**
     * Shows a Dialog with a title, a message, a EditText and two Buttons for OK
     * and Cancel. The user can't click OK when the EditText is empty.
     *
     * @param context
     *            The Context of the calling Activity
     * @param title
     *            Title of the Dialog
     * @param message
     *            Message of the Dialog
     * @param inputEditText
     *            The EditText used for this Dialog. You can modify it for
     *            example by setting the input type before passing it to this
     *            method. You can also read the text from the calling method.
     * @param onOkClickListener
     *            The Listener for clicking on the OK button.
     */
    public static void showDialog(Context context, String title, String message, EditText inputEditText,
            DialogInterface.OnClickListener onOkClickListener) {

        AlertDialog.Builder alert = new AlertDialog.Builder(context);
        alert.setTitle(title);
        alert.setMessage(message);
        alert.setView(inputEditText);

        /*
         * OK button
         */
        alert.setPositiveButton(context.getString(android.R.string.ok), onOkClickListener);
        /*
         * Cancel button
         */
        alert.setNegativeButton(context.getString(android.R.string.cancel), new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int whichButton) {
                /*
                 * Canceled.
                 */
            }
        });

        final AlertDialog dialog = alert.show();
        if (dialog != null) {
            /*
             * Disable ok button.
             */
            dialog.getButton(DialogInterface.BUTTON_POSITIVE).setEnabled(false);
            /*
             * Dis- and enable , dependent on the text entered
             */
            inputEditText.addTextChangedListener(new TextWatcher() {
                /**
                 * Enable OK button if text entered, disable otherwise.
                 */
                public void onTextChanged(CharSequence s, int start, int before, int count) {
                    dialog.getButton(DialogInterface.BUTTON_POSITIVE)
                            .setEnabled(!s.toString().equals("") && isValideUrl(s.toString()));
                }

                public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                }

                public void afterTextChanged(Editable s) {
                }
            });
        }
    }

    /**
     * Validates if the server-adress is correct (ipv4 || ipv6 || url)
     *
     * @param serverUrl
     * @return
     */
    public static boolean isValideUrl(String serverUrl) {
        return serverUrl.matches(UrlAndIPRegEx);
    }
}