The document discusses implementing native camera access for an Android application using Codename One. It provides code samples for initializing a CameraView, setting camera properties and methods, and handling callbacks for images, videos, and errors. The CameraNativeAccessImpl class is used to access the camera from Codename One code by running operations on the Android UI thread. Hints are also provided for adding dependencies to build.gradle and configuring ProGuard.

1. Building Native Camera Access - Part II

2. Android Port
© Codename One 2017 all rights reserved
✦Use the include source feature
✦You can implement and debug the code right within the
native IDE
✦This applies to both iOS & Android

3. import com.wonderkiln.camerakit.*;
import com.codename1.impl.android.AndroidNativeUtil;
import com.codename1.impl.android.AndroidImplementation;
import java.io.File;
CameraNativeAccessImpl

4. import com.wonderkiln.camerakit.*;
import com.codename1.impl.android.AndroidNativeUtil;
import com.codename1.impl.android.AndroidImplementation;
import java.io.File;
CameraNativeAccessImpl

5. import com.wonderkiln.camerakit.*;
import com.codename1.impl.android.AndroidNativeUtil;
import com.codename1.impl.android.AndroidImplementation;
import java.io.File;
CameraNativeAccessImpl

6. public class CameraNativeAccessImpl {
private CameraView view;
private CameraKitEventListener listener =
new CameraKitEventListener() {
public void onEvent(CameraKitEvent event) {}
public void onError(CameraKitError error) {
String errorMessage = "";
if(error.getException() != null) {
errorMessage = error.getException().toString();
com.codename1.io.Log.e(error.getException());
com.codename1.io.Log.sendLogAsync();
}
CameraCallbacks.onError(error.getType(),
error.getMessage(), errorMessage);
}
public void onImage(CameraKitImage image) {
CameraCallbacks.onImage(image.getJpeg());
}
public void onVideo(CameraKitVideo video) {
CameraCallbacks.onVideo("file://" +
video.getVideoFile().getAbsolutePath());
}
};
CameraNativeAccessImpl

7. public class CameraNativeAccessImpl {
private CameraView view;
private CameraKitEventListener listener =
new CameraKitEventListener() {
public void onEvent(CameraKitEvent event) {}
public void onError(CameraKitError error) {
String errorMessage = "";
if(error.getException() != null) {
errorMessage = error.getException().toString();
com.codename1.io.Log.e(error.getException());
com.codename1.io.Log.sendLogAsync();
}
CameraCallbacks.onError(error.getType(),
error.getMessage(), errorMessage);
}
public void onImage(CameraKitImage image) {
CameraCallbacks.onImage(image.getJpeg());
}
public void onVideo(CameraKitVideo video) {
CameraCallbacks.onVideo("file://" +
video.getVideoFile().getAbsolutePath());
}
};
CameraNativeAccessImpl

8. public class CameraNativeAccessImpl {
private CameraView view;
private CameraKitEventListener listener =
new CameraKitEventListener() {
public void onEvent(CameraKitEvent event) {}
public void onError(CameraKitError error) {
String errorMessage = "";
if(error.getException() != null) {
errorMessage = error.getException().toString();
com.codename1.io.Log.e(error.getException());
com.codename1.io.Log.sendLogAsync();
}
CameraCallbacks.onError(error.getType(),
error.getMessage(), errorMessage);
}
public void onImage(CameraKitImage image) {
CameraCallbacks.onImage(image.getJpeg());
}
public void onVideo(CameraKitVideo video) {
CameraCallbacks.onVideo("file://" +
video.getVideoFile().getAbsolutePath());
}
};
CameraNativeAccessImpl

9. public void start() {
AndroidImplementation.runOnUiThreadAndBlock(new Runnable() {
public void run() {
if(view == null) {
view = new CameraView(AndroidNativeUtil.getContext());
view.addCameraKitListener(listener);
}
view.start();
}
});
}
public void stop() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.stop();
}
});
}
public boolean isStarted() {
if(view == null) {
return false;
}
return view.isStarted();
}
CameraNativeAccessImpl

10. public void start() {
AndroidImplementation.runOnUiThreadAndBlock(new Runnable() {
public void run() {
if(view == null) {
view = new CameraView(AndroidNativeUtil.getContext());
view.addCameraKitListener(listener);
}
view.start();
}
});
}
public void stop() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.stop();
}
});
}
public boolean isStarted() {
if(view == null) {
return false;
}
return view.isStarted();
}
CameraNativeAccessImpl

11. public void start() {
AndroidImplementation.runOnUiThreadAndBlock(new Runnable() {
public void run() {
if(view == null) {
view = new CameraView(AndroidNativeUtil.getContext());
view.addCameraKitListener(listener);
}
view.start();
}
});
}
public void stop() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.stop();
}
});
}
public boolean isStarted() {
if(view == null) {
return false;
}
return view.isStarted();
}
CameraNativeAccessImpl

12. public void run() {
view.stop();
}
});
}
public boolean isStarted() {
if(view == null) {
return false;
}
return view.isStarted();
}
public void setMethod(final int param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.setMethod(param);
}
});
}
public android.view.View getView() {
return view;
}
public boolean isSupported() {
return true;
}
CameraNativeAccessImpl

13. public void run() {
view.stop();
}
});
}
public boolean isStarted() {
if(view == null) {
return false;
}
return view.isStarted();
}
public void setMethod(final int param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.setMethod(param);
}
});
}
public android.view.View getView() {
return view;
}
public boolean isSupported() {
return true;
}
CameraNativeAccessImpl

14. public void setPermissions(final int param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.setPermissions(param);
}
});
}
public void setZoom(final float param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.setZoom(param);
}
});
}
public void setFocus(final int param) {
// ... same runOnUiThread code
}
public void setFlash(final int param) {
// ... same runOnUiThread code
}
public void setFacing(final int param) {
// ... same runOnUiThread code
}
CameraNativeAccessImpl

15. public void setPermissions(final int param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.setPermissions(param);
}
});
}
public void setZoom(final float param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.setZoom(param);
}
});
}
public void setFocus(final int param) {
// ... same runOnUiThread code
}
public void setFlash(final int param) {
// ... same runOnUiThread code
}
public void setFacing(final int param) {
// ... same runOnUiThread code
}
CameraNativeAccessImpl

16. public int getFacing() {
return view.getFacing();
}
public boolean isFacingFront() {
return view.isFacingFront();
}
public boolean isFacingBack() {
return view.isFacingBack();
}
public float getVerticalViewingAngle() {
return view.getCameraProperties().verticalViewingAngle;
}
public float getHorizontalViewingAngle() {
return view.getCameraProperties().horizontalViewingAngle;
}
public int getFlash() {
return view.getFlash();
}
public int getPreviewWidth() {
return view.getPreviewSize().getWidth();
}
public int getPreviewHeight() {
return view.getPreviewSize().getHeight();
CameraNativeAccessImpl

17. public int getFacing() {
return view.getFacing();
}
public boolean isFacingFront() {
return view.isFacingFront();
}
public boolean isFacingBack() {
return view.isFacingBack();
}
public float getVerticalViewingAngle() {
return view.getCameraProperties().verticalViewingAngle;
}
public float getHorizontalViewingAngle() {
return view.getCameraProperties().horizontalViewingAngle;
}
public int getFlash() {
return view.getFlash();
}
public int getPreviewWidth() {
return view.getPreviewSize().getWidth();
}
public int getPreviewHeight() {
return view.getPreviewSize().getHeight();
CameraNativeAccessImpl

18. public void captureVideoFile(final String param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
String f = param;
if (param.startsWith("file://")) {
f = param.substring(7);
}
view.captureVideo(new File(f));
}
});
}
public void captureImage() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.captureImage();
}
});
}
public void captureVideo() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.captureVideo();
}
});
}
public void stopVideo() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
CameraNativeAccessImpl

19. public void captureVideoFile(final String param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
String f = param;
if (param.startsWith("file://")) {
f = param.substring(7);
}
view.captureVideo(new File(f));
}
});
}
public void captureImage() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.captureImage();
}
});
}
public void captureVideo() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.captureVideo();
}
});
}
public void stopVideo() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
CameraNativeAccessImpl

20. public void captureVideoFile(final String param) {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
String f = param;
if (param.startsWith("file://")) {
f = param.substring(7);
}
view.captureVideo(new File(f));
}
});
}
public void captureImage() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.captureImage();
}
});
}
public void captureVideo() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
public void run() {
view.captureVideo();
}
});
}
public void stopVideo() {
AndroidNativeUtil.getActivity().runOnUiThread(new Runnable() {
CameraNativeAccessImpl

21. Build Hints
© Codename One 2017 all rights reserved
android.gradleDep=compile 'com.wonderkiln:camerakit:0.13.1';

22. ProGuard
© Codename One 2017 all rights reserved
android.proguardKeep=-dontwarn com.google.android.gms.**

23. Build Tools 27
© Codename One 2017 all rights reserved
android.buildToolsVersion=27