Question

我正在研究Camera应用程序但是在setCameraOrientation中，当我尝试进行显示旋转时，我总是在rotation中得到0

/**If you want to make the camera image show in the same orientation as the display, you can use the following code.
*/
  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);
  }

在onSurfaceChanged

中称为此方法

Answer 1

尝试

Display display = ((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();
if(display.getRotation() == Surface.ROTATION_0)
if(display.getRotation() == Surface.ROTATION_90)
if(display.getRotation() == Surface.ROTATION_180)
if(display.getRotation() == Surface.ROTATION_270)

Answer 2

如果关闭自动旋转功能，这会在我的手机（三星J3 Prime）中发生。

activity.getWindowManager（）。getDefaultDisplay（）。getRotation（）始终为0

2 个答案: