Opening flashlight in android with different modes

Question

Will the code as below work on android devices like Motorola razor who doesn't support torch? Can someone please be kind enough to test if has any phone like that and please tell me.

Thanks in advance!!

       if (!isFlashOn) {
           if (camera == null || params == null) {
               return;
             }     
           List<String> flashModes = params.getSupportedFlashModes();
           if(flashModes.contains(Parameters.FLASH_MODE_TORCH)){

          try { 
                   params = camera.getParameters();
                   params.setFlashMode(Parameters.FLASH_MODE_TORCH);
                   camera.setParameters(params);
                   camera.startPreview();
                   toggleButtonImage();
                   isFlashOn = true;

           }catch (RuntimeException e) {
            }

           }

           else {
                    params = camera.getParameters();
                    params.setFlashMode(Parameters.FLASH_MODE_ON);
                    camera.setParameters(params);
                    camera.startPreview();
                    toggleButtonImage();
                    isFlashOn = true;
           }
           toggleButtonImage();
           isFlashOn = true;

       }

   }

P.S Should i additionally add something like:

if (flashModes.contains(android.hardware.Camera.Parameters.FLASH_MODE_AUTO))
           {
                params.setFlashMode(Parameters.FLASH_MODE_AUTO);
                camera.setParameters(params);
                camera.startPreview();
           }

It works on Motorola g and galaxy S4(torch supported)

@Kevin TeslaCoil Since you are experienced with that can you take a look please? — We're All Mad Here, Feb 10 '14 at 12:35

score 3 · Accepted Answer · answered Feb 17 '14 at 07:06

3

You can open flashlight in different modes if different flash modes are supported in your device. You can get the code from this open source camera code. OPenCamera

answered Feb 17 '14 at 07:06

ROHIT PARMAR

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15
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Thanks a lot, although everything is messy and has too many functions, it does contains what i am looking for! – We're All Mad Here Feb 17 '14 at 12:54

score 2 · Answer 2 · edited May 23 '17 at 12:08

2

Yes, if You check that device supports torch. But You can encounter a Device-Specific issue that is very prevalent in the Android. You can find more information in this post.

edited May 23 '17 at 12:08

Community

1
1

answered Feb 13 '14 at 11:08

Roman Black

3,501
1
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I would like if someone could provide the 4 possible solutions to turn on flash `red eye, auto, on, torch` detailed – We're All Mad Here Feb 15 '14 at 12:06

score 0 · Answer 3 · answered Feb 12 '17 at 16:23

you should check supported flash modes to not have an exception, setFlashMode method checks for supported modes but checking with this method is helpful to set flash mode button or view on UI

public List<String> getSupportedFlashModes() {
    return params.getSupportedFlashModes();
}

Sum of all Flash modes are:

Camera.Parameters.FLASH_MODE_AUTO, Camera.Parameters.FLASH_MODE_OFF, Camera.Parameters.FLASH_MODE_ON, Camera.Parameters.FLASH_MODE_RED_EYE, Camera.Parameters.FLASH_MODE_TORCH

But some or any of these flash modes may not be available in your device, check before using. After selecting from flash modes you can set the flash modes using this method

public synchronized void setFlashMode(String flashMode) {
        Camera.Parameters params = mCamera.getParameters();
        if (cameraId == Camera.CameraInfo.CAMERA_FACING_BACK && params.getSupportedFlashModes() != null
            && params.getSupportedFlashModes().contains(flashMode)) {
        params.setFlashMode(flashMode);
        mCamera.setParameters(params);
    }
}

Opening flashlight in android with different modes

3 Answers3

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