how to check if device has flash light led android

Question

How can I check if a device has a camera led (flashlight)? I am talking about devices with android OS?

I have seen solutions some solutions which talks about how to turn the led on and off but what will happen if the device doesn't even has a led.

for turning on the camera I am using camera.open()

Answer 1

The other answers

boolean hasFlash = this.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);

Does not work for the new 2013 Nexus 7. The following code will work:

public boolean hasFlash() {
        if (camera == null) {
            return false;
        }

        Camera.Parameters parameters;
        try {
            parameters = camera.getParameters();
        } catch (RuntimeException ignored)  {
            return false;
        }

        if (parameters.getFlashMode() == null) {
            return false;
        }

        List<String> supportedFlashModes = parameters.getSupportedFlashModes();
        if (supportedFlashModes == null || supportedFlashModes.isEmpty() || supportedFlashModes.size() == 1 && supportedFlashModes.get(0).equals(Camera.Parameters.FLASH_MODE_OFF)) {
            return false;
        }

        return true;
    }

Answer 2

getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH) returns true if the device has flash. See this for more details

Answer 3

You should be able to check whether the flash is available by checking system features:

boolean hasFlash = this.getPackageManager()
                       .hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH);

(provided you are in an Activity). If not, than use some sort of context in place of this.

P.S. Note that this information is quite easy to find if you actually try searching for it.

Answer 4

PackageManager pm = context.getPackageManager();
        if (!pm.hasSystemFeature(PackageManager.FEATURE_CAMERA)) {
            Log.e("err", "Device has no camera!");
            return;
        }       
        camera = Camera.open();
        p = camera.getParameters();
        flashModes = p.getSupportedFlashModes();
if(flashModes==null){
                        Toast.makeText(getApplicationContext(), "LED Not Available",Toast.LENGTH_LONG).show();
                }else
                {
Toast.makeText(getApplicationContext(), "LED  Available",Toast.LENGTH_LONG).show();
}

Answer 5

This is how I check if LED flash is available. Also you don't need to have the Camera permission to run this method.

private fun isLedFlashAvailable(context: Context): Boolean {
    // method 1
    if (context.packageManager.hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)) {
        return true
    }

    // method 2
    val cameraManager = context.getSystemService(Context.CAMERA_SERVICE) as CameraManager
    for (id in cameraManager.cameraIdList) {
        if (cameraManager.getCameraCharacteristics(id).get(CameraCharacteristics.FLASH_INFO_AVAILABLE) == true) {
            return true
        }
    }

    return false
}