SurfaceView->Surface没有有效的本机Windows Android Camera API硬件。Camera2

Question

我对Android的SurfaceView类在最新的相机API上使用它进行开发遇到了麻烦。我再次检查了我的最低API水平是21。

我用两种方法实现了这一点，一种是在XML中创建SurfaceView，然后将它的值赋予我的私有SurfaceView，或者用公共构造函数创建它。

package com.example.universitywork.canyouwork;
/* IMPORTS */ 

public class MainActivity extends AppCompatActivity implements SurfaceHolder.Callback {
// CREAMOS CLASES
private CameraManager mManager;
private CameraDevice cDevice;
private CaptureRequest cRequest;
private Handler handle = new Handler();
private SurfaceView surface;
private SurfaceHolder holder;
private Surface under;
private final CameraDevice.StateCallback mCallbackDevice = new CameraDevice.StateCallback() {

    @Override
    public void onOpened(CameraDevice camera) {
        cDevice = camera;
        try {
            camera.createCaptureSession(Arrays.asList(under), mCallbackSession, handle);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }

    }

    @Override
    public void onDisconnected(CameraDevice camera) {
        System.out.println("ONDC");
    }

    @Override
    public void onError(CameraDevice camera, int error) {
        System.out.println("ONerror");
    }
};

private final CameraCaptureSession.CaptureCallback mCaptureCallback = new CameraCaptureSession.CaptureCallback() {

};

private final CameraCaptureSession.StateCallback mCallbackSession = new CameraCaptureSession.StateCallback() {

    @Override
    public void onConfigured(CameraCaptureSession session) {
        try {
            System.out.println("LLEGO AQUI");

            cRequest = cDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW).build();
          //  session.capture(cRequest, mCaptureCallback, handle);
        } catch (CameraAccessException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onConfigureFailed(CameraCaptureSession session) {
        System.out.println("ONCONFIGUREFAILED");
    }
};

public MainActivity() {

}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    surface= new SurfaceView(this);
    holder = surface.getHolder();
    holder.addCallback(this);
    holder.setFixedSize(500,500);
    under= holder.getSurface();
    mManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
    String id = getId(mManager);
    try {
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {

            // TODO: Consider calling
            //    ActivityCompat#requestPermissions
            // here to request the missing permissions, and then overriding
            //   public void onRequestPermissionsResult(int requestCode, String[] permissions,
            //                                          int[] grantResults)
            // to handle the case where the user grants the permission. See the documentation
            // for ActivityCompat#requestPermissions for more details.
            return;
        }
        mManager.openCamera(id, mCallbackDevice, handle);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}


@Override
public void surfaceCreated(SurfaceHolder holder) {
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    System.out.println("ONCHANGED");
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
    System.out.println("ONDESTROYED");
}
public String getId (CameraManager manager) {
    try {
        for (String cameraId : manager.getCameraIdList()) {
            CameraCharacteristics characteristics =         manager.getCameraCharacteristics(cameraId);
            int orientation =     characteristics.get(CameraCharacteristics.LENS_FACING);
            if (orientation == CameraCharacteristics.LENS_FACING_FRONT) return cameraId;
        }
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
    return "NULL";
}}

快进错误：

    E/Legacy-CameraDevice-JNI: getNativeWindow: Surface had no valid native window.
    E/Legacy-CameraDevice-JNI: LegacyCameraDevice_nativeDetectSurfaceDimens: Could not retrieve native window from surface.
    D/AndroidRuntime: Shutting down VM
    E/AndroidRuntime: FATAL EXCEPTION: main
                  Process: com.example.universitywork.canyouwork, PID: 4885
                  java.lang.IllegalArgumentException: Surface was abandoned
                      at android.hardware.camera2.utils.SurfaceUtils.getSurfaceSize(SurfaceUtils.java:70)
                      at android.hardware.camera2.params.OutputConfiguration.<init>(OutputConfiguration.java:97)
                      at android.hardware.camera2.params.OutputConfiguration.<init>(OutputConfiguration.java:71)
                      at android.hardware.camera2.impl.CameraDeviceImpl.createCaptureSession(CameraDeviceImpl.java:474)
                      at com.example.universitywork.canyouwork.MainActivity$1.onOpened(MainActivity.java:40)
                      at android.hardware.camera2.impl.CameraDeviceImpl$1.run(CameraDeviceImpl.java:134)
                      at android.os.Handler.handleCallback(Handler.java:739)
                      at android.os.Handler.dispatchMessage(Handler.java:95)
                      at android.os.Looper.loop(Looper.java:148)
                      at android.app.ActivityThread.main(ActivityThread.java:5417)
                      at java.lang.reflect.Method.invoke(Native Method)
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                   Caused by: android.hardware.camera2.legacy.LegacyExceptionUtils$BufferQueueAbandonedException
                      at android.hardware.camera2.legacy.LegacyExceptionUtils.throwOnError(LegacyExceptionUtils.java:64)
                      at android.hardware.camera2.legacy.LegacyCameraDevice.getSurfaceSize(LegacyCameraDevice.java:540)
                      at android.hardware.camera2.utils.SurfaceUtils.getSurfaceSize(SurfaceUtils.java:68)
                      at android.hardware.camera2.params.OutputConfiguration.<init>(OutputConfiguration.java:97) 
                      at android.hardware.camera2.params.OutputConfiguration.<init>(OutputConfiguration.java:71) 
                      at android.hardware.camera2.impl.CameraDeviceImpl.createCaptureSession(CameraDeviceImpl.java:474) 
                      at com.example.universitywork.canyouwork.MainActivity$1.onOpened(MainActivity.java:40) 
                      at android.hardware.camera2.impl.CameraDeviceImpl$1.run(CameraDeviceImpl.java:134) 
                      at android.os.Handler.handleCallback(Handler.java:739) 
                      at android.os.Handler.dispatchMessage(Handler.java:95) 
                      at android.os.Looper.loop(Looper.java:148) 
                      at android.app.ActivityThread.main(ActivityThread.java:5417) 
                      at java.lang.reflect.Method.invoke(Native Method) 
                      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

我认为这与SurfaceView的大小或下垫面有关。也许我没有正确使用它，但是Android文档说它可以用SurfaceView制作。

Answer 1

几个小时后，我意识到我只需要访问SurfaceCreated（）而我没有访问它，解决方案是不在onCreate（）中openCamera。