Android / Java:检测设备是否有BACK摄像头

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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

@H_301_4@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: @H_301_4@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:

@H_301_4@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);

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