我有一个为iOS编写的cordova插件,用于传输相机信息,但很难将其转换为Android。感谢您阅读camera2 API和https://issuetracker.google.com/issues/110066569,我已经取得了一些进展。
我希望不会实际创建图片来获取相机值,而这似乎是在captureRequest
上发出Surface
吗?
我声明了一些类变量
CameraManager manager;
CameraDevice cameraDevice;
CaptureRequest.Builder builder;
String cameraId;
protected final String TAG = "STREAMLINX_CAMERA";
CallbackContext callbackContext;
加载视图后,我发出start()
public void start() {
this.manager = (CameraManager) cordova.getActivity().getSystemService(Context.CAMERA_SERVICE);
this.cameraId = this.getCameraId(CameraCharacteristics.LENS_FACING_FRONT);
if (!cordova.hasPermission(Manifest.permission.CAMERA)) {
cordova.requestPermission(this, 0, Manifest.permission.CAMERA);
} else {
this.callbackContext.sendPluginResult(new PluginResult(PluginResult.Status.OK, "success"));
try {
this.manager.openCamera(cameraId, stateCallback, null);
} catch (CameraAccessException e) {
Log.e(TAG, e.toString());
} catch (SecurityException e) {
Log.e(TAG, e.toString());
}
}
}
然后在cordova应用程序中,我每500毫秒运行一个capture()
public void capture() {
Log.d(TAG, "capture");
builder.build();
Log.d(TAG, "APERTURE: " + builder.get(CaptureRequest.LENS_APERTURE));
Log.d(TAG, "ISO: " + builder.get(CaptureRequest.SENSOR_SENSITIVITY));
Log.d(TAG, "EXPOSURE: " + builder.get(CaptureRequest.SENSOR_EXPOSURE_TIME));
}
..和我的一些帮助
private String getCameraId(int orientation) {
try {
for (String cameraId: this.manager.getCameraIdList()) {
CameraCharacteristics characteristics = this.manager.getCameraCharacteristics(cameraId);
Log.d(TAG, "RANGE: " + characteristics.get(SENSOR_INFO_SENSITIVITY_RANGE);
if (characteristics.get(CameraCharacteristics.LENS_FACING) == orientation) {
return cameraId;
}
}
} catch (CameraAccessException e) {
Log.e(TAG, e.toString());
}
return null;
}
private final CameraDevice.StateCallback stateCallback = new CameraDevice.StateCallback() {
@Override
public void onOpened(CameraDevice camera) {
cameraDevice = camera;
try {
builder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_MANUAL);
} catch (CameraAccessException e) {
Log.e(TAG, e.toString());
}
}
@Override
public void onDisconnected(CameraDevice camera) {
cameraDevice.close();
}
@Override
public void onError(CameraDevice camera, int error) {
cameraDevice.close();
cameraDevice = null;
}
};
我相信我需要将我的createCaptureRequest
更改为createCaptureSession
的某种形式,并使用Surface
,但不确定是否因为我看了一些代码样本。
我是否缺少一些可以获取相机当前状态的API功能?