| /* |
| * Copyright (C) 2010 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 com.google.zxing.client.android.camera; |
| |
| import android.hardware.Camera; |
| import android.os.Handler; |
| import android.os.Message; |
| import android.util.Log; |
| |
| 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; |
| } |
| |
| public void onAutoFocus(boolean success, Camera camera) { |
| if (autoFocusHandler != null) { |
| Message message = autoFocusHandler.obtainMessage(autoFocusMessage, success); |
| // Simulate continuous autofocus by sending a focus request every |
| // AUTOFOCUS_INTERVAL_MS milliseconds. |
| //Log.d(TAG, "Got auto-focus callback; requesting another"); |
| autoFocusHandler.sendMessageDelayed(message, AUTOFOCUS_INTERVAL_MS); |
| autoFocusHandler = null; |
| } else { |
| Log.d(TAG, "Got auto-focus callback, but no handler for it"); |
| } |
| } |
| |
| } |