Android Open Source - ivotingverification Auto Focus Callback

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License

The source code is released under:

GNU General Public License

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Java Source Code

/**
 * Copyright (C) 2013 Eesti Vabariigi Valimiskomisjon 
 * (Estonian National Electoral Committee), www.vvk.ee
 */*from   w w w.  j  av a 2  s  . com*/
 * Written in 2013 by AS Finestmedia, www.finestmedia.ee
 *
 * Vote-verification application for Estonian Internet voting system
 *
 * 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/>.
 *
 * This file incorporates work covered by the following copyright and  
 * permission notice:  
 * 
 * Copyright (C) 2008 ZXing authors
 * 
 * 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.
 **/

package ee.vvk.ivotingverification.qr;

import android.hardware.Camera;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import ee.vvk.ivotingverification.util.Util;

final class AutoFocusCallback implements Camera.AutoFocusCallback {

  private static final String TAG = AutoFocusCallback.class.getSimpleName();

  private static final long AUTOFOCUS_INTERVAL_MS = 1500L;

  private Handler autoFocusHandler;
  private int autoFocusMessage;

  void setHandler(Handler autoFocusHandler, int autoFocusMessage) {
    this.autoFocusHandler = autoFocusHandler;
    this.autoFocusMessage = autoFocusMessage;
  }

  @Override
  public void onAutoFocus(boolean success, Camera camera) {
    if (autoFocusHandler != null) {
      Message message = autoFocusHandler.obtainMessage(autoFocusMessage,
          success);
      autoFocusHandler.sendMessageDelayed(message, AUTOFOCUS_INTERVAL_MS);
      autoFocusHandler = null;
    } else {
      if (Util.DEBUGGABLE) {
        Log.d(TAG, "Got auto-focus callback, but no handler for it");
      }
    }
  }
}

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