Android Open Source - commotion-android I P Preference

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License

The source code is released under:

GNU General Public License

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Java Source Code

/*
 *  This file is part of Commotion Mesh Tether
 *  Copyright (C) 2010 by Szymon Jakubczak
 *// www.j  av  a 2s.c o m
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package net.commotionwireless.meshtether;

import android.content.Context;
import android.preference.EditTextPreference;
import android.text.method.DigitsKeyListener;
import android.util.AttributeSet;
import android.view.View;
import android.widget.EditText;
import android.widget.Toast;

/**
 * EditTextPreference that allows IP addresses only
 */
public class IPPreference extends EditTextPreference {
  public IPPreference(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); }
  public IPPreference(Context context, AttributeSet attrs) { super(context, attrs); }
  public IPPreference(Context context) { super(context); }

  @Override
  protected void onAddEditTextToDialogView(View dialogView, EditText editText) {
    editText.setKeyListener(DigitsKeyListener.getInstance("0123456789."));
    super.onAddEditTextToDialogView(dialogView, editText);
  }

  public static boolean validate(String addr) {
    try {
      //if(addr.length() == 0) // don't want empty address
      //  return false;
      if(java.net.InetAddress.getByName(addr) == null)
        return false;
    } catch (java.net.UnknownHostException e) {
      return false;
    }
    return true;
  }

  @Override
  protected void onDialogClosed(boolean positiveResult) {
    if (positiveResult) {
      // verify now that it's an IP
      String addr = getEditText().getText().toString();
      if (!validate(addr)) {
        Toast.makeText(getContext(),
            getContext().getString(R.string.invalidip),
            Toast.LENGTH_SHORT).show();
        positiveResult = false;
      }
    }
    super.onDialogClosed(positiveResult);
  }
}

Java Source Code List