# NDK Camera
[](https://travis-ci.org/luncliff/NdkCamera)
> If there is an issue with this library, please mail to [email protected]
Simplified [Android Camera 2 API](https://www.youtube.com/watch?v=Bi4QjMfSOE0).
Available for both Java/JNI.
- API level: 24+
- NDK
### Reference
- Personal Template Project: https://github.com/luncliff/Muffin
- [API Reference](https://developer.android.com/ndk/reference/group/camera)
- [Android Camera Overview](https://source.android.com/devices/camera)
- Camera HAL3: https://source.android.com/devices/camera/camera3
- HAL Subsystem: https://source.android.com/devices/camera/camera3_requests_hal
- Multi-Camera Support: https://source.android.com/devices/camera/multi-camera
- Version Support: https://source.android.com/devices/camera/versioning
- Android Media
- https://source.android.com/devices/media/framework-hardening
## How to
### Build
For **Windows** environment, latest [Android Studio](https://developer.android.com/studio/) is recommended.
For **Linux/MacOS**, [Gradle 4.10.2](https://gradle.org/) will be enough.
```console
$ git clone https://github.com/luncliff/NdkCamera
$ cd ./NdkCamera
$ gradle assemble # Build: libndk_camera.so & NdkCamera.aar
```
### Test
Connect your device and run the test with Gradle.
Please reference the [test codes](./android/test/ndcam/).
```console
$ gradle connectedAndroidTest # Run test
```
### Use
The following code shows working with `SurfaceView` class.
```java
package dev.example;
// ...
import dev.ndcam.*;
// Expect we already have a camera permission
public class SurfaceDisplay
implements SurfaceHolder.Callback
{
SurfaceView surfaceView;
Surface surface;
ndcam.Device camera;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// ...
// Load/Init library
ndcam.CameraModel.Init();
surfaceView = findViewById(R.id.surfaceView);
SurfaceHolder holder = surfaceView.getHolder();
holder.setFixedSize(1920, 1080);
holder.setFormat(ImageFormat.YUV_420_888);
holder.addCallback(this);
}
@Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
// Get all devices in array form
for(ndcam.Device device : ndcam.CameraModel.GetDevices())
if(device.facing() == CameraCharacteristics.LENS_FACING_BACK)
camera = device;
}
@Override
public void surfaceChanged(SurfaceHolder surfaceHolder,
int format, int width, int height) {
// Make a repeating caputre request with surface
surface = surfaceHolder.getSurface();
camera.repeat(surface);
}
@Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
// No more capture
if(camera != null)
camera.stopRepeat();
}
}
```
