CameraX 預覽未顯示在 PreviewView 中
[英]CameraX Preview not showing in PreviewView
問題描述
我已按照說明在此處使用 CameraX 實現 PreviewView（ https://developer.android.com/training/camerax/preview ）。 我還下載了示例代碼，它工作得很好。 但在我的代碼中它只是不會顯示預覽。 日志看起來很好，它正在做一些事情，因為我將預覽視圖的背景顏色設置為綠色，如果我啟動預覽邏輯，它就會被清除。 如果這有什么不同，我會在帶有 TabLayout 的 ViewPager 中使用它。
布局.xml
<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.camera.view.PreviewView
android:id="@+id/preview"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
</layout>
分段
public class QRFragment extends Fragment {
public static final String TAG = QRFragment.class.getSimpleName();
private static final int REQUEST_PERMISSION_CAMERA = 777;
public static Fragment newInstance() {
return new QRFragment();
}
private GuideQrFragmentBinding binding;
private ListenableFuture<ProcessCameraProvider> cameraProviderFuture;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
Log.v(TAG, "create view");
this.binding = GuideQrFragmentBinding.inflate(inflater, container, false);
// binding.setViewModel(this.mViewModel);
return binding.getRoot();
}
@Override
public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
Log.v(TAG, "view created");
}
private void startPreview() {
Log.v(TAG, "startPreview");
this.cameraProviderFuture = ProcessCameraProvider.getInstance(this.requireContext());
this.cameraProviderFuture.addListener(() -> {
Log.v(TAG, "cameraProviderFuture.Listener");
try {
ProcessCameraProvider cameraProvider = cameraProviderFuture.get();
Preview preview = new Preview.Builder()
.build();
CameraSelector cameraSelector = new CameraSelector.Builder()
.requireLensFacing(CameraSelector.LENS_FACING_BACK)
.build();
cameraProvider.unbindAll();
Camera camera = cameraProvider.bindToLifecycle(this.getViewLifecycleOwner(),
cameraSelector,
preview);
preview.setSurfaceProvider(this.binding.preview.getSurfaceProvider());
} catch (ExecutionException | InterruptedException e) {
// No errors need to be handled for this Future.
// This should never be reached.
Log.e(TAG, "cameraProviderFuture.Listener", e);
}
}, ContextCompat.getMainExecutor(this.requireContext()));
}
@Override
public void onResume() {
super.onResume();
if( ActivityCompat.checkSelfPermission(this.requireContext(), Manifest.permission.CAMERA) == PackageManager.PERMISSION_GRANTED ) {
if( this.cameraProviderFuture == null ) {
this.startPreview();
}
} else {
this.requestPermissions(new String[] { Manifest.permission.CAMERA }, REQUEST_PERMISSION_CAMERA);
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if( requestCode == REQUEST_PERMISSION_CAMERA ) {
for( int p = 0; p < permissions.length; p++ ) {
if( Manifest.permission.CAMERA.equals(permissions[p]) ) {
if( grantResults[p] == PackageManager.PERMISSION_GRANTED ) {
this.startPreview();
} else {
}
}
}
} else {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
}
}
日志
2021-02-01 13:05:18.920 4217-4217/com.myapp.app V/QRFragment: create view
2021-02-01 13:05:18.936 4217-4217/com.myapp.app V/QRFragment: view created
2021-02-01 13:05:18.953 4217-4217/com.myapp.app V/QRFragment: startPreview
2021-02-01 13:05:18.982 4217-4782/com.myapp.app I/CameraManagerGlobal: Connecting to camera service
2021-02-01 13:05:18.985 4217-4782/com.myapp.app D/VendorTagDescriptor: addVendorDescriptor: vendor tag id 3854507339 added
2021-02-01 13:05:18.988 4217-4257/com.myapp.app I/CameraManagerGlobal: Camera 0 facing CAMERA_FACING_BACK state now CAMERA_STATE_CLOSED for client com.myapp.app API Level 2
2021-02-01 13:05:18.989 4217-4257/com.myapp.app I/CameraManagerGlobal: Camera 1 facing CAMERA_FACING_FRONT state now CAMERA_STATE_OPEN for client com.samsung.adaptivebrightnessgo API Level 2
2021-02-01 13:05:18.990 4217-4257/com.myapp.app I/CameraManagerGlobal: Camera 2 facing CAMERA_FACING_FRONT state now CAMERA_STATE_CLOSED for client android.system API Level 2
2021-02-01 13:05:18.990 4217-4257/com.myapp.app I/CameraManagerGlobal: Camera 50 facing CAMERA_FACING_BACK state now CAMERA_STATE_CLOSED for client android.system API Level 2
2021-02-01 13:05:19.046 4217-4782/com.myapp.app D/CameraRepository: Added camera: 0
2021-02-01 13:05:19.099 4217-4782/com.myapp.app I/Camera2CameraInfo: Device Level: INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED
2021-02-01 13:05:19.101 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 0 status STATUS_PRESENT
2021-02-01 13:05:19.101 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 1 status STATUS_PRESENT
2021-02-01 13:05:19.102 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 2 status STATUS_PRESENT
2021-02-01 13:05:19.102 4217-4782/com.myapp.app D/CameraRepository: Added camera: 1
2021-02-01 13:05:19.102 4217-4802/com.myapp.app D/UseCaseAttachState: Active and attached use case: [] for camera: 0
2021-02-01 13:05:19.104 4217-4782/com.myapp.app I/Camera2CameraInfo: Device Level: INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED
2021-02-01 13:05:19.104 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 0 status STATUS_PRESENT
2021-02-01 13:05:19.105 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 1 status STATUS_PRESENT
2021-02-01 13:05:19.105 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 2 status STATUS_PRESENT
2021-02-01 13:05:19.105 4217-4782/com.myapp.app D/CameraRepository: Added camera: 2
2021-02-01 13:05:19.105 4217-4803/com.myapp.app D/UseCaseAttachState: Active and attached use case: [] for camera: 1
2021-02-01 13:05:19.107 4217-4782/com.myapp.app I/Camera2CameraInfo: Device Level: INFO_SUPPORTED_HARDWARE_LEVEL_LIMITED
2021-02-01 13:05:19.108 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 0 status STATUS_PRESENT
2021-02-01 13:05:19.108 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 1 status STATUS_PRESENT
2021-02-01 13:05:19.108 4217-4802/com.myapp.app D/UseCaseAttachState: Active and attached use case: [] for camera: 2
2021-02-01 13:05:19.108 4217-4782/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 2 status STATUS_PRESENT
2021-02-01 13:05:19.110 4217-4217/com.myapp.app V/QRFragment: cameraProviderFuture.Listener
2021-02-01 13:05:19.149 4217-4217/com.myapp.app D/DeferrableSurface: Surface created[total_surfaces=1, used_surfaces=0](androidx.camera.core.SurfaceRequest$2@f584149}
2021-02-01 13:05:19.153 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Use case Preview:androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983 INACTIVE
2021-02-01 13:05:19.154 4217-4217/com.myapp.app D/CameraOrientationUtil: getRelativeImageRotation: destRotationDegrees=0, sourceRotationDegrees=90, isOppositeFacing=true, result=90
2021-02-01 13:05:19.154 4217-4803/com.myapp.app D/UseCaseAttachState: Active and attached use case: [] for camera: 0
2021-02-01 13:05:19.155 4217-4217/com.myapp.app D/PreviewView: Surface requested by Preview.
2021-02-01 13:05:19.156 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Use cases [Preview:androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983] now ATTACHED
2021-02-01 13:05:19.158 4217-4803/com.myapp.app D/UseCaseAttachState: All use case: [androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983163463287] for camera: 0
2021-02-01 13:05:19.159 4217-4803/com.myapp.app D/UseCaseAttachState: Active and attached use case: [] for camera: 0
2021-02-01 13:05:19.160 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Resetting Capture Session
2021-02-01 13:05:19.162 4217-4217/com.myapp.app D/SurfaceView: onWindowVisibilityChanged(0) true android.view.SurfaceView{9f7ad5a V.E...... ......ID 0,0-0,0} of ViewRootImpl@581aad2[MainActivity]
2021-02-01 13:05:19.162 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Releasing session in state INITIALIZED
2021-02-01 13:05:19.163 4217-4217/com.myapp.app D/PreviewView: Preview transformation info updated. TransformationInfo{cropRect=Rect(0, 0 - 1440, 1080), rotationDegrees=90, targetRotation=0}
2021-02-01 13:05:19.163 4217-4217/com.myapp.app D/PreviewTransform: Transformation info set: TransformationInfo{cropRect=Rect(0, 0 - 1440, 1080), rotationDegrees=90, targetRotation=0} 1440x1080 false
2021-02-01 13:05:19.165 4217-4803/com.myapp.app D/CameraStateRegistry: tryOpenCamera(Camera@ea5acee[id=0]) [Available Cameras: 1, Already Open: false (Previous state: null)] --> SUCCESS
2021-02-01 13:05:19.169 4217-4803/com.myapp.app D/CameraStateRegistry: Recalculating open cameras:
Camera State
-------------------------------------------------------------------
Camera@163f523[id=2] UNKNOWN
Camera@640eda1[id=1] UNKNOWN
Camera@ea5acee[id=0] OPENING
-------------------------------------------------------------------
Open count: 1 (Max allowed: 1)
2021-02-01 13:05:19.171 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Transitioning camera internal state: INITIALIZED --> OPENING
2021-02-01 13:05:19.173 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Opening camera.
2021-02-01 13:05:19.175 4217-4803/com.myapp.app D/UseCaseAttachState: All use case: [androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983163463287] for camera: 0
2021-02-01 13:05:19.187 4217-4217/com.myapp.app D/ViewRootImpl@581aad2[MainActivity]: Relayout returned: old=(0,0,1080,2340) new=(0,0,1080,2340) req=(1080,2340)0 dur=9 res=0x1 s={true 498507776000} ch=false
2021-02-01 13:05:19.201 4217-4217/com.myapp.app D/SurfaceView: surfaceCreated 1 #8 android.view.SurfaceView{9f7ad5a V.E...... ......ID 0,0-1440,1080}
2021-02-01 13:05:19.201 4217-4217/com.myapp.app D/SurfaceViewImpl: Surface created.
2021-02-01 13:05:19.201 4217-4217/com.myapp.app D/SurfaceView: surfaceChanged (1440,1080) 1 #8 android.view.SurfaceView{9f7ad5a V.E...... ......ID 0,0-1440,1080}
2021-02-01 13:05:19.202 4217-4217/com.myapp.app D/SurfaceViewImpl: Surface changed. Size: 1440x1080
2021-02-01 13:05:19.207 4217-4217/com.myapp.app D/SurfaceViewImpl: Surface set on Preview.
2021-02-01 13:05:19.411 4217-4257/com.myapp.app I/CameraManagerGlobal: Camera 1 facing CAMERA_FACING_FRONT state now CAMERA_STATE_CLOSED for client com.samsung.adaptivebrightnessgo API Level 2
2021-02-01 13:05:19.422 4217-4257/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 0 status STATUS_NOT_AVAILABLE
2021-02-01 13:05:19.423 4217-4257/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 0 status STATUS_NOT_AVAILABLE
2021-02-01 13:05:19.425 4217-4257/com.myapp.app I/CameraManagerGlobal: postSingleUpdate device: camera id 0 status STATUS_NOT_AVAILABLE
2021-02-01 13:05:19.428 4217-4257/com.myapp.app I/CameraManagerGlobal: Camera 0 facing CAMERA_FACING_BACK state now CAMERA_STATE_OPEN for client com.myapp.app API Level 2
2021-02-01 13:05:19.452 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Use case Preview:androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983 INACTIVE
2021-02-01 13:05:19.455 4217-4803/com.myapp.app D/UseCaseAttachState: Active and attached use case: [] for camera: 0
2021-02-01 13:05:19.458 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Use case Preview:androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983 ACTIVE
2021-02-01 13:05:19.460 4217-4803/com.myapp.app D/UseCaseAttachState: Active and attached use case: [androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983163463287] for camera: 0
2021-02-01 13:05:19.470 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} CameraDevice.onOpened()
2021-02-01 13:05:19.476 4217-4803/com.myapp.app D/Camera2CameraImpl: {Camera@ea5acee[id=0]} Transitioning camera internal state: OPENING --> OPENED
2021-02-01 13:05:19.481 4217-4803/com.myapp.app D/CameraStateRegistry: Recalculating open cameras:
Camera State
-------------------------------------------------------------------
Camera@163f523[id=2] UNKNOWN
Camera@640eda1[id=1] UNKNOWN
Camera@ea5acee[id=0] OPEN
-------------------------------------------------------------------
Open count: 1 (Max allowed: 1)
2021-02-01 13:05:19.483 4217-4803/com.myapp.app D/UseCaseAttachState: All use case: [androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983163463287] for camera: 0
2021-02-01 13:05:19.497 4217-4803/com.myapp.app D/UseCaseAttachState: Active and attached use case: [androidx.camera.core.Preview-ece4a019-fe39-4341-ab30-82f47580d983163463287] for camera: 0
2021-02-01 13:05:19.505 4217-4803/com.myapp.app D/SyncCaptureSessionBase: [androidx.camera.camera2.internal.SynchronizedCaptureSessionBaseImpl@e53a798] getSurface...done
2021-02-01 13:05:19.506 4217-4803/com.myapp.app D/DeferrableSurface: New surface in use[total_surfaces=1, used_surfaces=1](androidx.camera.core.SurfaceRequest$2@f584149}
2021-02-01 13:05:19.507 4217-4803/com.myapp.app D/DeferrableSurface: use count+1, useCount=1 androidx.camera.core.SurfaceRequest$2@f584149
2021-02-01 13:05:19.507 4217-4803/com.myapp.app D/CaptureSession: Opening capture session.
2021-02-01 13:05:19.646 4217-4803/com.myapp.app D/CaptureSession: Attempting to send capture request onConfigured
2021-02-01 13:05:19.646 4217-4803/com.myapp.app D/CaptureSession: Issuing request for session.
2021-02-01 13:05:19.666 4217-4803/com.myapp.app D/CaptureSession: CameraCaptureSession.onConfigured() mState=OPENED
2021-02-01 13:05:19.667 4217-4803/com.myapp.app D/CaptureSession: CameraCaptureSession.onReady() OPENED
2021-02-01 13:05:20.414 4217-4248/com.myapp.app I/CameraManagerGlobal: Camera 0 facing CAMERA_FACING_BACK state now CAMERA_STATE_ACTIVE for client com.myapp.app API Level 2
2021-02-01 13:05:20.448 4217-4803/com.myapp.app D/StreamStateObserver: Update Preview stream state to STREAMING
1 個解決方案
解決方案1
1 已采納 2021-02-02 19:09:01
我發現了問題。 我必須在預覽視圖上將實現模式設置為兼容。
this.binding.preview.setImplementationMode(PreviewView.ImplementationMode.COMPATIBLE);
CameraX PreviewView 什么都不顯示
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