需要注意的是安卓不同版本间会有一些变化，安卓7.0以上和7.0以下的版本有所区别
安卓 7.0 以上：
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| @TargetApi(Build.VERSION_CODES.N)
@RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
public void flashControl(boolean enable) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
try {
CameraManager cameraManager = (CameraManager) getApplicationContext().getSystemService(Context.CAMERA_SERVICE);
String[] ids = cameraManager.getCameraIdList();
for (String id : ids) {
CameraCharacteristics c = cameraManager.getCameraCharacteristics(id);
Boolean flashAvailable = c.get(CameraCharacteristics.FLASH_INFO_AVAILABLE);
Integer lensFacing = c.get(CameraCharacteristics.LENS_FACING);
if (flashAvailable != null && flashAvailable && lensFacing != null && lensFacing == CameraCharacteristics.LENS_FACING_BACK) {
cameraManager.setTorchMode(id, enable);
}
}
} catch (CameraAccessException e) {
e.printStackTrace();
}
}
}
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安卓 7.0 以下：
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| Camrea camera = Camera.open();
Camera.Parameters parameters = camera.getParameters();
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
camera.setParameters(parameters);
parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
camera.setParameters(parameters);
@Override
public void onDestroy() {
super.onDestroy();
camera.release();
}
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