我正在为 CameraX 创建一个本机 UI 组件以响应本机。首先尝试触发活动以检查并正常工作。期待提取为 React Native 的 UI 视图。它只是显示一个空白的白色屏幕。
- 相机预览未显示（视图样式的 100% w 和 h 在 JS 中定义）？
//bind to lifecycle:
CameraX.bindToLifecycle((AppCompatActivity) mContext.getCurrentActivity(), preview);
我的片段如下：
相机布局：
<androidx.constraintlayout.widget.ConstraintLayout ...>
<TextureView android:id="@+id/textureView" ... />
</androidx.constraintlayout.widget.ConstraintLayout>
相机视图：
public class CameraXView extends View {
private static final String TAG = ReactContextBaseJavaModule.class.getSimpleName();
TextureView textureView;
Preview preview;
ThemedReactContext mContext;
public CameraXView(ThemedReactContext context) {
super(context);
mContext = context;
ConstraintLayout layout = (ConstraintLayout) LayoutInflater.from(context).inflate(R.layout.camera_layout, null);
textureView = layout.findViewById(R.id.textureView);
startCamera();
}
}
启动 CameraX 功能：
public void startCamera() {
CameraX.unbindAll();
Rational aspectRatio = new Rational(textureView.getWidth(), textureView.getHeight());
Size screen = new Size(textureView.getWidth(), textureView.getHeight()); //size of the screen
PreviewConfig pConfig = new PreviewConfig.Builder().setTargetAspectRatio(aspectRatio).setTargetResolution(screen).build();
Preview preview = new Preview(pConfig);
preview.setOnPreviewOutputUpdateListener(
new Preview.OnPreviewOutputUpdateListener() {
@Override
public void onUpdated(Preview.PreviewOutput output) {
ViewGroup parent = (ViewGroup) textureView.getParent();
parent.removeView(textureView);
parent.addView(textureView, 0);
textureView.setSurfaceTexture(output.getSurfaceTexture());
updateTransform();
}
});
//bind to lifecycle:
CameraX.bindToLifecycle((AppCompatActivity) mContext.getCurrentActivity(), preview);
}
ReactViewManager：将当前活动从 reactContext 传递给视图实例
public class ReactCameraXManager extends SimpleViewManager<CameraXView> implements LifecycleEventListener {
public static final String TAG = ReactContextBaseJavaModule.class.getSimpleName();
public static final String REACT_CLASS = "CameraXView";
private Activity mActivity;
public ReactCameraXManager(ReactApplicationContext reactContext) {
super();
mActivity = reactContext.getCurrentActivity();
reactContext.addLifecycleEventListener(this);
}
@Override
public String getName() {
return REACT_CLASS;
}
@Override
public CameraXView createViewInstance(final ThemedReactContext context) {
return new CameraXView(context);
}
渲染相机视图后的实际日志：
09-26 20:15:18.994 8156-8178/com.app D/Camera: Use cases [Preview:androidx.camera.core.Preview-e0193733-9ece-4c39-85e5-b93a6f2bf2e1] OFFLINE for camera 0
09-26 20:15:18.994 8156-8178/com.app D/Camera: Closing camera: 0
09-26 20:15:18.995 8156-8178/com.app I/RequestQueue: Repeating capture request cancelled.
09-26 20:15:19.174 8156-8168/com.app E/BufferQueueProducer: [SurfaceTexture-1-8156-4] cancelBuffer: BufferQueue has been abandoned
09-26 20:15:19.174 8156-8169/com.app E/BufferQueueProducer: [SurfaceTexture-1-8156-4] cancelBuffer: BufferQueue has been abandoned
09-26 20:15:19.174 8156-8191/com.app E/BufferQueueProducer: [SurfaceTexture-1-8156-4] cancelBuffer: BufferQueue has been abandoned
09-26 20:15:19.174 8156-8168/com.app E/BufferQueueProducer: [SurfaceTexture-1-8156-4] cancelBuffer: BufferQueue has been abandoned
09-26 20:15:19.175 8156-8169/com.app E/BufferQueueProducer: [SurfaceTexture-1-8156-4] cancelBuffer: BufferQueue has been abandoned
09-26 20:15:19.175 8156-8191/com.app E/BufferQueueProducer: [SurfaceTexture-1-8156-4] cancelBuffer: BufferQueue has been abandoned
09-26 20:15:19.208 8156-8178/com.app D/Camera: Closing Capture Session
09-26 20:15:19.209 8156-8178/com.app D/Camera: CameraDevice.onClosed(): 0
09-26 20:15:19.209 8156-8178/com.app D/Camera: Closing Capture Session
09-26 20:15:19.216 8156-8178/com.app D/Camera: Use cases [Preview:androidx.camera.core.Preview-a29229b4-7347-4920-8407-d60e97ec229b] ONLINE for camera 0
09-26 20:15:19.216 8156-8178/com.app D/Camera: Opening camera: 0
09-26 20:15:19.216 8156-8178/com.app D/UseCaseAttachState: All use case: [androidx.camera.core.Preview-a29229b4-7347-4920-8407-d60e97ec229b] for camera: 0
09-26 20:15:19.230 8156-8178/com.app I/CameraManager: Using legacy camera HAL.
09-26 20:15:19.432 8156-8178/com.app D/UseCaseAttachState: Active and online use case: [] for camera: 0
09-26 20:15:19.432 8156-8178/com.app D/UseCaseAttachState: All use case: [androidx.camera.core.Preview-a29229b4-7347-4920-8407-d60e97ec229b] for camera: 0
09-26 20:15:19.432 8156-8178/com.app D/Camera: Closing Capture Session
09-26 20:15:19.432 8156-8178/com.app D/Camera: CameraDevice is null
09-26 20:15:19.432 8156-8178/com.app D/Camera: Use case Preview:androidx.camera.core.Preview-a29229b4-7347-4920-8407-d60e97ec229b ACTIVE for camera 0
09-26 20:15:19.432 8156-8178/com.app D/UseCaseAttachState: Active and online use case: [androidx.camera.core.Preview-a29229b4-7347-4920-8407-d60e97ec229b] for camera: 0
09-26 20:15:19.432 8156-8178/com.app D/Camera: CameraDevice.onOpened(): 0
09-26 20:15:19.432 8156-8178/com.app D/UseCaseAttachState: All use case: [androidx.camera.core.Preview-a29229b4-7347-4920-8407-d60e97ec229b] for camera: 0
09-26 20:15:19.432 8156-8178/com.app D/Camera: Closing Capture Session
09-26 20:15:19.433 8156-8178/com.app D/CaptureSession: Opening capture session.
09-26 20:15:19.435 8156-8178/com.app I/CameraDeviceState: Legacy camera service transitioning to state CONFIGURING
09-26 20:15:19.437 8156-9611/com.app I/RequestThread-0: Configure outputs: 1 surfaces configured.
09-26 20:15:19.437 8156-9611/com.app D/Camera: app passed NULL surface
09-26 20:15:19.465 8156-8178/com.app I/CameraDeviceState: Legacy camera service transitioning to state IDLE
09-26 20:15:19.466 8156-8178/com.app D/CaptureSession: Attempting to send capture request onConfigured
09-26 20:15:19.466 8156-8178/com.app D/CaptureSession: Issuing request for session.
09-26 20:15:19.468 8156-8178/com.app I/RequestQueue: Repeating capture request set.
09-26 20:15:19.468 8156-8178/com.app D/CaptureSession: CameraCaptureSession.onConfigured()
09-26 20:15:19.468 8156-8178/com.app D/CaptureSession: CameraCaptureSession.onReady()
09-26 20:15:19.468 8156-8178/com.app D/CaptureSession: CameraCaptureSession.onReady()
09-26 20:15:19.471 8156-9611/com.app W/LegacyRequestMapper: convertRequestMetadata - control.awbRegions setting is not supported, ignoring value
09-26 20:15:19.471 8156-9611/com.app W/LegacyRequestMapper: Only received metering rectangles with weight 0.
09-26 20:15:19.471 8156-9611/com.app W/LegacyRequestMapper: Only received metering rectangles with weight 0.
09-26 20:15:19.675 8156-9612/com.app I/CameraDeviceState: Legacy camera service transitioning to state CAPTURING
09-26 20:18:22.352 8156-8167/com.app I/art: Background partial concurrent mark sweep GC freed 483777(15MB) AllocSpace objects, 0(0B) LOS objects, 35% free, 29MB/45MB, paused 1.554ms total 104.490ms
09-26 20:19:30.100 8156-8167/com.app I/art: Background sticky concurrent mark sweep GC freed 473262(15MB) AllocSpace objects, 0(0B) LOS objects, 34% free, 29MB/45MB, paused 771us total 166.198ms
09-26 20:20:35.488 8156-8167/com.app I/art: Background partial concurrent mark sweep GC freed 491511(15MB) AllocSpace objects, 0(0B) LOS objects, 35% free, 29MB/45MB, paused 968us total 100.951ms
注意：我没有看到任何 react-native 包。所以计划创建一个新包。