Before AndroidN (7.0) your control on flashlight might look like this:
Camera camera = ();
if(open){
Parameters mParameters = ();
(.FLASH_MODE_TORCH);
(mParameters);
} else {
Parameters mParameters = ();
(.FLASH_MODE_OFF);
(mParameters);
}
();
But in Android N (7.0) and later, maybe you find that it doesn't work, so you need to do this:
After Android (M) 6.0, Android introduced a new API, and the control of flash is handled through CameraManager; first, we briefly explain the two classes:
（1）：
It can be obtained through CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE); to communicate with the camera device through this type.
（2）:
Given the specified camera device ID, query the relevant hardware information through this type.
Flashlight operation
try {
//Get CameraManager CameraManager mCameraManager = (CameraManager) ().getSystemService(Context.CAMERA_SERVICE);
//Get all camera device IDs of the current mobile phone String[] ids = ();
for (String id : ids) {
CameraCharacteristics c = (id);
//Check whether the camera component contains a flash Boolean flashAvailable = (CameraCharacteristics.FLASH_INFO_AVAILABLE);
/*
* Get the direction the camera faces
* CameraCharacteristics.LENS_FACING_FRONT Front camera
* CameraCharacteristics.LENS_FACING_BACK only cameras
* CameraCharacteristics.LENS_FACING_EXTERNAL External camera
*/
Integer lensFacing = (CameraCharacteristics.LENS_FACING);
if (flashAvailable != null && flashAvailable
&& lensFacing != null && lensFacing == CameraCharacteristics.LENS_FACING_BACK) {
//Open or close the flashlight (id, OPEN? true:false);
}
}
} catch (CameraAccessException e) {
();
}
The above is all the content of this article. I hope it will be helpful to everyone's study and I hope everyone will support me more.