小编Ant*_*ton的帖子

我正在尝试制作相机预览应用程序。当我打电话

session.setRepeatingRequest(captureRequestBuilder.build(), null, backgroundHandler)

我收到此错误：

E/HandlerDispatcher: IllegalArgumentException while invoking public abstract void android.hardware.camera2.CameraCaptureSession$StateCallback.onConfigured(android.hardware.camera2.CameraCaptureSession)
    java.lang.IllegalArgumentException: Each request must have at least one Surface target
        at android.hardware.camera2.impl.CameraDeviceImpl.submitCaptureRequest(CameraDeviceImpl.java:934)
        at android.hardware.camera2.impl.CameraDeviceImpl.setRepeatingRequest(CameraDeviceImpl.java:993)
        at android.hardware.camera2.impl.CameraCaptureSessionImpl.setRepeatingRequest(CameraCaptureSessionImpl.java:239)
        at anthe.rwca.org.robocup19.MainActivity$3.onConfigured(MainActivity.java:147)
        at java.lang.reflect.Method.invoke(Native Method)
        at android.hardware.camera2.dispatch.InvokeDispatcher.dispatch(InvokeDispatcher.java:39)
        at android.hardware.camera2.dispatch.HandlerDispatcher$1.run(HandlerDispatcher.java:65)
        at android.os.Handler.handleCallback(Handler.java:789)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:164)
        at android.os.HandlerThread.run(HandlerThread.java:65)

这是我的代码：

CameraDevice.StateCallback stateCallback = new CameraDevice.StateCallback() {
        @Override
        public void onOpened(@NonNull CameraDevice camera) {
            cameraDevice = camera;
            createCaptureSession();
        }

        @Override
        public void onDisconnected(@NonNull CameraDevice camera) {

        }

        @Override
        public void onError(@NonNull CameraDevice camera, int …