相机视图在我的Android应用程序Nexus 5X中颠倒了？

Question

我正在开发一个在后台使用相机预览的Android应用程序.它在不同的设备上运行良好.

但是在Nexus 5X上进行测试时,相机预览是颠倒的.我在清单中使用这些权限

<uses-permission android:name="android.permission.CAMERA" />

我的相机代码如下

public void startCamera(int myTexture)
  {
    surface = new SurfaceTexture(myTexture);

    try {
      camera = Camera.open();


    } catch (Exception e) {
      Log.e("MainActivity", "failed to open Camera");
      e.printStackTrace();
    }
    try
    {
      camera1.setPreviewTexture(surface);
      camera1.startPreview();
    }
    catch (IOException ioe)
    {
      Log.w("MainActivity","Camera launch failed");
    }
  }

试过camera.setDisplayOrientation(180); 但没有奏效.请帮忙!

Answer 1

如本专业提示中所述，您需要使用setDisplayOrientation()正确旋转预览以匹配设备方向。

文档中的完整代码（适用于 Nexus 5X）是：

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);
}