无法连接到摄像机服务 [英] Fail to connect to camera service

问题描述

我有我的相机设置为 this.setRequestedOrientation（ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE）; ，它工作正常，但如果我把它改为肖像 >而不是

I had my camera set to this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); and it works fine but if I change it to PORTRAIT instead of LANDSCAPE then it crashes with the following error...

07-30 12:51:37.655: ERROR/AndroidRuntime(22069): FATAL EXCEPTION: main
07-30 12:51:37.655: ERROR/AndroidRuntime(22069): java.lang.RuntimeException: Fail to connect to camera service
07-30 12:51:37.655: ERROR/AndroidRuntime(22069):     at android.hardware.Camera.native_setup(Native Method)
07-30 12:51:37.655: ERROR/AndroidRuntime(22069):     at android.hardware.Camera.<init>(Camera.java:110)
07-30 12:51:37.655: ERROR/AndroidRuntime(22069):     at android.hardware.Camera.open(Camera.java:90)
07-30 12:51:37.655: ERROR/AndroidRuntime(22069):     at org.digital.com.CamLayer.surfaceCreated(CamLayer.java:3

该方法崩溃的是...

The method it crashes in is..

public void surfaceCreated(SurfaceHolder holder) {
    synchronized(this) {
        mCamera = Camera.open();

        Camera.Parameters p = mCamera.getParameters(); 
        p.setPreviewSize(800, 480);
        mCamera.setParameters(p);

        try {
            mCamera.setPreviewDisplay(holder);
        } catch (IOException e) {
            Log.e("Camera", "mCamera.setPreviewDisplay(holder);");
        }

        mCamera.startPreview();
        mCamera.setPreviewCallback(this);
    }
}

它崩溃的 mCamera = Camera.open（）;

我的清单文件有＆LT;使用-权限的Andr​​oid：名称=android.permission.CAMERA＆GT;＆LT; /使用-许可＆GT;

我该如何解决这个问题，所以我可以在纵向视图我的应用程序？

How do I fix this so I can view my app in Portrait?

推荐答案

有关您参考，这是我用我的应用程序的SurfaceHolderCallBack内部类并在Nexus One 2.2在纵向模式下工作正常 - 希望它有助于

For your reference, this is the SurfaceHolderCallBack inner class that I'm using in my app and which works fine on Nexus One 2.2 in portrait mode - hope it helps.

编辑：这工作=，它不会崩溃。虽然我还没有想出如何正确旋转preVIEW图像（见我的上述第一注释）。这就是为什么我竟然不得不用景观而这周围preVIEW面成横向模式转换用户界面的东西。 AFAIK preVIEW（以preVIEW图像的正确旋转）只能在横向模式。旋转和放大器;定向PARAMS我试过没有帮助的。

"which works" = "which doesn't crash". Although I haven't figured out how to rotate the preview image correctly (see my first comment above). That's why I actually had to use landscape and 'convert' UI stuff that's surrounding the preview surface into landscape mode. Afaik preview (with correct rotation of the preview image) only works in landscape mode. Rotation & orientation params that I tried didn't help at all.

class SurfaceHolderCallback implements SurfaceHolder.Callback {
    private static final int IMAGE_WIDTH = 512;
    private static final int IMAGE_HEIGHT = 384;
    private static final String ORIENTATION = "orientation";
    private static final String ROTATION = "rotation";
    private static final String PORTRAIT = "portrait";
    private static final String LANDSCAPE = "landscape";

    public void surfaceCreated(SurfaceHolder holder) {
        try {
            // This case can actually happen if the user opens and closes the camera too frequently.
            // The problem is that we cannot really prevent this from happening as the user can easily
            // get into a chain of activites and tries to escape using the back button.
            // The most sensible solution would be to quit the entire EPostcard flow once the picture is sent.
            camera = Camera.open();
        } catch(Exception e) {
            finish();
            return;
        }

        //Surface.setOrientation(Display.DEFAULT_DISPLAY,Surface.ROTATION_90);
        Parameters p = camera.getParameters();
        p.setPictureSize(IMAGE_WIDTH, IMAGE_HEIGHT);

        camera.getParameters().setRotation(90);

        Camera.Size s = p.getSupportedPreviewSizes().get(0);
        p.setPreviewSize( s.width, s.height );

        p.setPictureFormat(PixelFormat.JPEG);
        p.set("flash-mode", "auto");
        camera.setParameters(p);

        try {
            camera.setPreviewDisplay(surfaceHolder);
        } catch (Throwable ignored) {
            Log.e(APP, "set preview error.", ignored);
        }
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int width,
                               int height) {
        if (isPreviewRunning) {
            camera.stopPreview();
        }
        try {
            camera.startPreview();
        } catch(Exception e) {
            Log.d(APP, "Cannot start preview", e);    
        }
        isPreviewRunning = true;
    }

    public void surfaceDestroyed(SurfaceHolder arg0) {
        if(isPreviewRunning && camera != null) {
            if(camera!=null) {
                camera.stopPreview();
                camera.release();  
                camera = null;
            }
            isPreviewRunning = false;
        }
    }
}

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