如何检测设备背面是否有摄像头？
这是我检测设备是否有手电筒的代码：
- if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_FLASH)
- || (_camera.getParameters().getSupportedFlashModes() != null)) hasFlashlight = true;
- else hasFlashlight = false;
但即使设备只有没有手电筒的前置摄像头,它也是正确的.
解决方法
对于API> = 9：您可以使用
Camera.getCameraInfo这样的内容：
- int backCameraId = -1;
- for(int i=0;i<Camera.getNumberOfCameras();i++){
- CameraInfo cameraInfo = new CameraInfo();
- Camera.getCameraInfo(i,cameraInfo);
- if(cameraInfo.facing==CameraInfo.CAMERA_FACING_BACK) {
- backCameraId = i;
- break;
- }
- }
- Log.d(TAG,"back camera exists ? "+(backCameraId>-1));
- Log.d(TAG,"back camera id :"+backCameraId);
对于API> = 21,建议您使用Camera2 API：
- String backCameraId = null;
- CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
- for(String cameraId:manager.getCameraIdList()){
- CameraCharacteristics cameraCharacteristics = manager.getCameraCharacteristics(cameraId);
- Integer facing = cameraCharacteristics.get(CameraCharacteristics.LENS_FACING);
- if(facing==CameraMetadata.LENS_FACING_BACK) {
- backCameraId = cameraId;
- break;
- }
- }
- Log.d(TAG,"back camera exists ? "+(backCameraId!=null));
- Log.d(TAG,"back camera id :"+backCameraId);
