/*
?*?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
??}

}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????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

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

?????目錄??????????0??2015-10-29?13:51??qrcodescanner\camera

?????目錄??????????0??2015-10-29?13:57??qrcodescanner\view

?????目錄??????????0??2015-10-30?11:02??qrcodescanner

-----------?---------??----------?-----??----

???????????????123665????????????????????26