我有一个摩托罗拉无视系统安卓2.1和我让一个应用程序有摄像机的预览。问题是,该摄像机运作现在Galaxy S与安卓2.1,但是对摩托罗拉的照相机转动90度。我已经试图这样做:

Parameters parameters = camera.getParameters();
parameters.setRotation(90);

但是它不工作。我没有找到任何解决方案。

有帮助吗?

解决方案

if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
        camera.setDisplayOrientation(90);
        lp.height = previewSurfaceHeight;
        lp.width = (int) (previewSurfaceHeight / aspect);
    } else {
        camera.setDisplayOrientation(0);
        lp.width = previewSurfaceWidth;
        lp.height = (int) (previewSurfaceWidth / aspect);
    }

其他提示

现在的Android文档中有官方的示例代码(setDisplayorientation()):

public static void setCameraDisplayOrientation(Activity activity,
        int cameraId, android.hardware.Camera camera)
{
    android.hardware.Camera.CameraInfo info = new android.hardware.Camera.CameraInfo();
    android.hardware.Camera.getCameraInfo(cameraId, info);
    int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
    int degrees = 0;
    switch (rotation)
    {
    case Surface.ROTATION_0:
        degrees = 0;
        break;
    case Surface.ROTATION_90:
        degrees = 90;
        break;
    case Surface.ROTATION_180:
        degrees = 180;
        break;
    case Surface.ROTATION_270:
        degrees = 270;
        break;
    }

    int result;
    if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT)
    {
        result = (info.orientation + degrees) % 360;
        result = (360 - result) % 360; // compensate the mirror
    }
    else
    { // back-facing
        result = (info.orientation - degrees + 360) % 360;
    }
    camera.setDisplayOrientation(result);
}

camera.setDisplayorientation(INT)不存在2.1!

而且该代码可能会起作用,但在我的里程碑/机器人中失败了:(

Camera.Parameters parameters = camera.getParameters();
parameters.set("orientation", "portrait");
camera.setParameters(parameters);

您可以看到更多 http://code.google.com/p/android/issues/detail?id=1193#c42

我发现此代码在Android 1.6及以上都起作用(使用2.1为我工作,并在肖像模式下进行预览,而无需旋转)

public void surfaceCreated(SurfaceHolder holder){
        try{
            camera = Camera.open();
            setDisplayOrientation(camera, 90);
            camera.setPreviewDisplay(holder);
            camera.startPreview();
        }catch(IOException e){
            Log.d("CAMERA", e.getMessage());
        }

}

protected void setDisplayOrientation(Camera camera, int angle){
        Method downPolymorphic;
        try
        {
            downPolymorphic = camera.getClass().getMethod("setDisplayOrientation", new Class[] { int.class });
            if (downPolymorphic != null)
                downPolymorphic.invoke(camera, new Object[] { angle });
        }
        catch (Exception e1)
        {
        }
}

该活动具有android:屏幕方向= androidmanifest.xml上的“肖像”

http://code.google.com/p/android/issues/detail?id=1193#c42

public static void setCameraDisplayOrientation(Activity activity,
                                               int cameraId,android.hardware.Camera camera) {
    android.hardware.Camera.CameraInfo info =
            new android.hardware.Camera.CameraInfo();
    android.hardware.Camera.getCameraInfo(cameraId, info);
    int rotation = activity.getWindowManager().getDefaultDisplay()
            .getRotation();
    int degrees = 0;
    switch (rotation) {
        case Surface.ROTATION_0: degrees = 0; break;
        case Surface.ROTATION_90: degrees = 90; break;
        case Surface.ROTATION_180: degrees = 180; break;
        case Surface.ROTATION_270: degrees = 270; break;
    }

    int result;
    if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
        result = (info.orientation + degrees) % 360;
        result = (360 - result) % 360;  // compensate the mirror
    } else {  // back-facing
        result = (info.orientation - degrees + 360) % 360;
    }
    camera.setDisplayOrientation(result);
}

我认为你可以不作任何设置,以支持API2.2至2.1.API没有在你目前的设备lib。你必须改变2.2支持API level8.顺便说一句,我也尽量使用API7级:

Parameters parameters = camera.getParameters();
parameters.setRotation(90);

这个函数的运作良好的照片但关系的一个。本星使用OS的2.2.0和一使用OS2.2.1.当我试图使用API level8:

camera.setDisplayOrientation(90);

他们两个很好的工作。因此,我认为API7级有问题,当我们使用上的安卓OS2.2.1.

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