package com.huyi.dish; import android.hardware.Camera; public class CloudLed { boolean m_isOn; Camera m_Camera; public boolean getIsOn() { return m_isOn; } public CloudLed() { m_isOn = false; } public void turnOn() { if (!m_isOn) { m_isOn = true; try { m_Camera = Camera.open(); Camera.Parameters mParameters; mParameters = m_Camera.getParameters(); mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH); m_Camera.setParameters(mParameters); } catch (Exception ex) { } } } public void turnOff() { if (m_isOn) { m_isOn = false; try { Camera.Parameters mParameters; mParameters = m_Camera.getParameters(); mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF); m_Camera.setParameters(mParameters); m_Camera.release(); } catch (Exception ex) { } } } }
我建立了一个CloudLed类,将Camera再做一次封装,只处理闪光灯相关部份的代码
在Android中,要开启摄像头只需透过Camera.Open就可以简单开启,开启后取得Camera.Parameters就可以设定参数
我们所需要的手电筒功能,只需要将其设为FLASH_MODE_TROCH即可
关闭时只要设置为FLASH_MODE_OFF后将其release就可以了
<?xml version=“1.0″ encoding=“utf-8″?> <manifest xmlns:android=“http://schemas.android.com/apk/res/android” package=“com.clouddevelop.ledtest” android:versionCode=“1″ android:versionName=“1.0″> <uses-sdk android:minSdkVersion=“8″ /> <application android:icon=“@drawable/icon” android:label=“@string/app_name”> <activity android:name=“.LEDTestActivity” android:label=“@string/app_name” android:screenOrientation=“portrait”> <intent-filter> <action android:name=“android.intent.action.MAIN” /> <category android:name=“android.intent.category.LAUNCHER” /> </intent-filter> </activity> </application> <uses-permission android:name=“android.permission.CAMERA”></uses-permission> </manifest>
在这边有个事项要注意,我们需在AndroidManifest.xml中设置存取摄像头的权限。
<uses-permission android:name=”android.permission.CAMERA”></uses-permission>