用SL4A打開/關閉相機閃光燈蟒蛇Python

Question

如何用sl4a Python打開和關閉相機LED？最大強度是好的。

任何在android。*？

下面的代碼：

import sys 

def toggle_LED(action="on"): 
    if action == 'on': 
     with open('/sys/class/leds/torch-flash/flash_light', 'w') as on: 
      on.write('1') 
    elif action == 'off': 
     with open('/sys/class/leds/torch-flash/flash_light', 'w') as off: 
      off.write('0') 


if __name__ == '__main__': 
    toggle_LED() 
    while True: 
     if strip(sys.stdin.read())[0] == 'q': 
      toggle_LED(action='off') 
      sys.exit() 

編輯：這款手機是華爲的Ideos X5 U8800H

Answer 1

任何在android系統*？

您可以在Android中按以下方式打開和關閉手電筒。

打開手電筒。

Camera cam = null; 
public void turnOnFlashLight() { 
    try { 
     if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) { 
      cam = Camera.open(); 
      Parameters p = cam.getParameters(); 
      p.setFlashMode(Parameters.FLASH_MODE_TORCH); 
      cam.setParameters(p); 
      cam.startPreview(); 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 
     Toast.makeText(getBaseContext(), "Exception throws in turning on flashlight.", Toast.LENGTH_SHORT).show(); 
    } 
} 

關掉手電筒。

public void turnOffFlashLight() { 
    try { 
     if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) { 
      cam.stopPreview(); 
      cam.release(); 
      cam = null; 
     } 
    } catch (Exception e) { 
     e.printStackTrace(); 
     Toast.makeText(getBaseContext(), "Exception throws in turning off flashlight.", Toast.LENGTH_SHORT).show(); 
    } 
} 

不要忘記在清單中添加權限。

<uses-permission android:name="android.permission.CAMERA" /> 
<uses-permission android:name="android.permission.FLASHLIGHT"/> 

更多參考：Turn on and turn off flash light programmatically in Android