Android zxing二维码扫描个人优化版

个人做二维码扫描，觉得效果还不错，留存以后用

/*
 * Copyright （C） 2012 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 cn.toltech.treefrog.qrcodescanner;

import android.content.Context;
import android.content.SharedPreferences;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.preference.PreferenceManager;

import cn.toltech.treefrog.qrcodescanner.camera.CameraManager;
import cn.toltech.treefrog.qrcodescanner.camera.FrontLightMode;

/**
 * Detects ambient light and switches on the front light when very dark and off again when sufficiently light.
 *
 * @author Sean Owen
 * @author Nikolaus Huber
 */
final class AmbientLightManager implements SensorEventListener {

  private static final float TOO_DARK_LUX = 45.0f;
  private static final float BRIGHT_ENOUGH_LUX = 450.0f;

  private final Context context;
  private CameraManager cameraManager;
  private Sensor lightSensor;

  AmbientLightManager（Context context） {
    this.context = context;
  }

  void start（CameraManager cameraManager） {
    this.cameraManager = cameraManager;
    SharedPreferences sharedPrefs = PreferenceManager.getDefaultSharedPreferences（context）;
    if （FrontLightMode.readPref（sharedPrefs） == FrontLightMode.AUTO） {
      SensorManager sensorManager = （SensorManager） context.getSystemService（Context.SENSOR_SERVICE）;
      lightSensor = sensorManager.getDefaultSensor（Sensor.TYPE_LIGHT）;
      if （lightSensor != null） {
        sensorManager.registerListener（this lightSensor SensorManager.SENSOR_DELAY_NORMAL）;
      }
    }
  }

  void stop（） {
    if （lightSensor != null） {
      SensorManager sensorManager = （SensorManager） context.getSystemService（Context.SENSOR_SERVICE）;
      sensorManager.unregisterListener（this）;
      cameraManager = null;
      lightSensor = null;
    }
  }

  @Override
  public void onSensorChanged（SensorEvent sensorEvent） {
    float ambientLightLux = sensorEvent.values[0];
    if （cameraManager != null） {
      if （ambientLightLux <= TOO_DARK_LUX） {
        cameraManager.setTorch（true）;
      } else if （ambientLightLux >= BRIGHT_ENOUGH_LUX） {
        cameraManager.setTorch（false）;
      }
    }
  }

  @Override
  public void onAccuracyChanged（Sensor sensor int accuracy） {
    // do nothing
  }

}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件       2934  2015-10-28 09:18  qrcodescanner\AmbientLightManager.java

     文件       4594  2015-10-28 09:19  qrcodescanner\BeepManager.java

     文件       4326  2015-10-28 09:08  qrcodescanner\camera\AutoFocusManager.java

     文件       5800  2015-10-28 09:08  qrcodescanner\camera\CameraConfigurationManager.java

     文件      16993  2015-10-28 09:08  qrcodescanner\camera\CameraConfigurationUtils.java

     文件      13706  2015-10-29 13:51  qrcodescanner\camera\CameraManager.java

     文件       1312  2015-10-28 09:13  qrcodescanner\camera\FrontLightMode.java

     文件       2521  2015-10-28 09:08  qrcodescanner\camera\open\OpenCameraInterface.java

     文件       1923  2015-10-28 09:08  qrcodescanner\camera\PreviewCallback.java

     文件      11712  2015-10-30 11:02  qrcodescanner\CaptureActivity.java

     文件       5926  2015-10-29 10:10  qrcodescanner\CaptureActivityHandler.java

     文件       3923  2015-10-28 09:08  qrcodescanner\Contents.java

     文件       4116  2015-10-28 09:08  qrcodescanner\DecodeFormatManager.java

     文件       4304  2015-10-29 10:08  qrcodescanner\DecodeHandler.java

     文件       4107  2015-10-29 09:55  qrcodescanner\DecodeThread.java

     文件       3487  2015-10-28 09:08  qrcodescanner\InactivityTimer.java

     文件      10414  2015-10-28 09:08  qrcodescanner\Intents.java

     文件        762  2015-10-28 09:08  qrcodescanner\IntentSource.java

     文件       3205  2015-10-28 09:08  qrcodescanner\PreferencesActivity.java

     文件       4481  2015-10-28 09:23  qrcodescanner\PreferencesFragment.java

     文件      11924  2015-10-29 13:57  qrcodescanner\view\ViewfinderView.java

     文件       1195  2015-10-28 09:23  qrcodescanner\ViewfinderResultPointCallback.java

     目录          0  2015-10-28 09:08  qrcodescanner\camera\open

     目录          0  2015-10-29 13:51  qrcodescanner\camera

     目录          0  2015-10-29 13:57  qrcodescanner\view

     目录          0  2015-10-30 11:02  qrcodescanner

----------- ---------  ---------- -----  ----

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