如何在surfaceview中将Android相机更改为人像？

Posted 2023-04-17

【中文标题】如何在surfaceview中将Android相机更改为人像？

【英文标题】：how to change the Android-camera to portrait in surfaceview?

【发布时间】：2012-08-18 20:27:23

【问题描述】：

我正在为 android 平板电脑编写代码，我希望我的应用程序使用 surfaceView 相机预览的纵向视图。默认是横向的，我尝试了以下代码来旋转到纵向视图：

public void surfaceCreated(SurfaceHolder holder)
  // The Surface has been created, acquire the camera and tell it where to draw.
  mCamera = Camera.open();
  Parameters params = mCamera.getParameters();
  // If we aren't landscape (the default), tell the camera we want portrait mode
  if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE)
    params.set("orientation", "portrait"); // "landscape"
    // And Rotate the final picture if possible
    // This works on 2.0 and higher only
    //params.setRotation(90);
    // Use reflection to see if it exists and to call it so you can support older versions
      try 
        Method rotateSet = Camera.Parameters.class.getMethod("setRotation", new Class[]  Integer.TYPE  );
        Object arguments[] = new Object[]  new Integer(270) ;
        rotateSet.invoke(params, arguments);
       catch (NoSuchMethodException nsme) 
        // Older Device
        Log.v("CameraView","No Set Rotation");
       catch (IllegalArgumentException e) 
        Log.v("CameraView","Exception IllegalArgument");
       catch (IllegalAccessException e) 
        Log.v("CameraView","Illegal Access Exception");
       catch (InvocationTargetException e) 
        Log.v("CameraView","Invocation Target Exception");
      
  
  mCamera.setParameters(params);
  try
    mCamera.setPreviewDisplay(holder);
   catch (IOException exception) 
    mCamera.release();
    mCamera = null;
  

但它不起作用。请问有人可以解决吗？

【问题讨论】：

也尝试了 Object arguments[] = new Object[] new Integer(90) ;但我仍然无法修复它。

既然你已经让surfaceview工作了，你能给我举个例子吗？我需要从 ipcamera 流式传输到我的 android，并且我想使用 surfaceview

【参考方案1】：

您可能希望使用setDisplayOrientation 函数，如下所示：

public void surfaceCreated(SurfaceHolder holder) 
    if (Build.VERSION.SDK_INT >= 8) mCamera.setDisplayOrientation(90);

使用相机 params.set("orientation"... 的东西在不同设备之间并不一致，并且实际上是 SDK 8 之前的语言。