Android相机setDisplayOrientation不起作用(Android Camera

2019-07-20 16:51发布

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我在android.my问题工作相机项目是相机setDisplayOrientation方法不工作，表面上我的相机预览总是landscape.i想在SurfaceView预期肖像摄像头预览。 我使用三星GALAXY Y（安卓2.3.5），并显示如下我的活动代码： 

import java.io.IOException;

import android.app.Activity;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Button;

public class AndroidCamera extends Activity implements SurfaceHolder.Callback{

 Camera camera;
 SurfaceView surfaceView;
 SurfaceHolder surfaceHolder;
 boolean previewing = false;;

 String stringPath = "/sdcard/samplevideo.3gp";

   /** Called when the activity is first created. */
   @Override
   public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.main);

       Button buttonStartCameraPreview = (Button)findViewById(R.id.startcamerapreview);
       Button buttonStopCameraPreview = (Button)findViewById(R.id.stopcamerapreview);

       getWindow().setFormat(PixelFormat.UNKNOWN);
       surfaceView = (SurfaceView)findViewById(R.id.surfaceview);
       surfaceHolder = surfaceView.getHolder();
       surfaceHolder.addCallback(this);
       surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

       buttonStartCameraPreview.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    if(!previewing){
     camera = Camera.open();
     if (camera != null){
      try {
       camera.setDisplayOrientation(90);
       camera.setPreviewDisplay(surfaceHolder);
       camera.startPreview();
       previewing = true;
      } catch (IOException e) {
       // TODO Auto-generated catch block
       e.printStackTrace();
      }
     }
    }
   }});

       buttonStopCameraPreview.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    if(camera != null && previewing){
     camera.stopPreview();
     camera.release();
     camera = null;

     previewing = false;
    }
   }});

   }



 @Override
 public void surfaceChanged(SurfaceHolder holder, int format, int width,
   int height) {
  // TODO Auto-generated method stub

 }

 @Override
 public void surfaceCreated(SurfaceHolder holder) {
  // TODO Auto-generated method stub

 }

 @Override
 public void surfaceDestroyed(SurfaceHolder holder) {
  // TODO Auto-generated method stub

 }
}

我的问题出图击：

任何一个可以与花费宝贵的时间的任何代码或教程链接和帮助的感谢

Answer 1:

最后我得到了解决办法，找到下面的代码摄像头预览表面观： 

import java.io.IOException;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.hardware.Camera;
import android.os.Build;
import android.util.Log;
import android.view.Display;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
    private SurfaceHolder mHolder;
    private Camera mCamera;

    private static boolean DEBUGGING = true;
    private static final String LOG_TAG = "CameraPreviewSample";
    private static final String CAMERA_PARAM_ORIENTATION = "orientation";
    private static final String CAMERA_PARAM_LANDSCAPE = "landscape";
    private static final String CAMERA_PARAM_PORTRAIT = "portrait";
    protected Activity mActivity;

    protected List<Camera.Size> mPreviewSizeList;
    protected List<Camera.Size> mPictureSizeList;
    protected Camera.Size mPreviewSize;
    protected Camera.Size mPictureSize;


    public CameraPreview(Context context, Camera camera) {
        super(context);

        mActivity=(Activity)context;
        mCamera = camera;

        // Install a SurfaceHolder.Callback so we get notified when the
        // underlying surface is created and destroyed.
        mHolder = getHolder();
        mHolder.addCallback(this);
        // deprecated setting, but required on Android versions prior to 3.0
        mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);


    }

    public void surfaceCreated(SurfaceHolder holder) {
        // The Surface has been created, now tell the camera where to draw the preview.
        try {
            mCamera.setPreviewDisplay(holder);
            mCamera.startPreview();
        } catch (IOException e) {
            Log.d("CameraView", "Error setting camera preview: " + e.getMessage());
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        // empty. Take care of releasing the Camera preview in your activity.
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
        // If your preview can change or rotate, take care of those events here.
        // Make sure to stop the preview before resizing or reformatting it.

        if (mHolder.getSurface() == null){
          // preview surface does not exist
          return;
        }

        // stop preview before making changes
        try {
           // mCamera.stopPreview();
        } catch (Exception e){
          // ignore: tried to stop a non-existent preview
        }

        // set preview size and make any resize, rotate or
        // reformatting changes here

        // start preview with new settings
        try {
            Camera.Parameters cameraParams = mCamera.getParameters();
            boolean portrait = isPortrait();
            configureCameraParameters(cameraParams, portrait);

            mCamera.setPreviewDisplay(mHolder);
            mCamera.startPreview();

        } catch (Exception e){
            Log.d("CameraView", "Error starting camera preview: " + e.getMessage());
        }
    }

    public void onPause() {
        mCamera.release();
        mCamera = null;
    }


    protected void configureCameraParameters(Camera.Parameters cameraParams, boolean portrait) {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.FROYO) { // for 2.1 and before
            if (portrait) {
                cameraParams.set(CAMERA_PARAM_ORIENTATION, CAMERA_PARAM_PORTRAIT);
            } else {
                cameraParams.set(CAMERA_PARAM_ORIENTATION, CAMERA_PARAM_LANDSCAPE);
            }
        } else { // for 2.2 and later
            int angle;
            Display display = mActivity.getWindowManager().getDefaultDisplay();
            switch (display.getRotation()) {
                case Surface.ROTATION_0: // This is display orientation
                    angle = 90; // This is camera orientation
                    break;
                case Surface.ROTATION_90:
                    angle = 0;
                    break;
                case Surface.ROTATION_180:
                    angle = 270;
                    break;
                case Surface.ROTATION_270:
                    angle = 180;
                    break;
                default:
                    angle = 90;
                    break;
            }
            Log.v(LOG_TAG, "angle: " + angle);
            mCamera.setDisplayOrientation(angle);
        }

        cameraParams.setPreviewSize(mPreviewSize.width, mPreviewSize.height);
        cameraParams.setPictureSize(mPictureSize.width, mPictureSize.height);
        if (DEBUGGING) {
            Log.v(LOG_TAG, "Preview Actual Size - w: " + mPreviewSize.width + ", h: " + mPreviewSize.height);
            Log.v(LOG_TAG, "Picture Actual Size - w: " + mPictureSize.width + ", h: " + mPictureSize.height);
        }

        mCamera.setParameters(cameraParams);
    }


    public boolean isPortrait() {
        return (mActivity.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT);
    }
}

它需要的最低SDK 2.3或更高版本



Answer 2:

如果你想旋转预览输出，试试这个： 

public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
    {            
        if (isPreviewRunning)
        {
            mCamera.stopPreview();
        }

        Parameters parameters = mCamera.getParameters();
        Display display = ((WindowManager)getSystemService(WINDOW_SERVICE)).getDefaultDisplay();

        if(display.getRotation() == Surface.ROTATION_0)
        {
            parameters.setPreviewSize(height, width);                           
            mCamera.setDisplayOrientation(90);
        }

        if(display.getRotation() == Surface.ROTATION_90)
        {
            parameters.setPreviewSize(width, height);                           
        }

        if(display.getRotation() == Surface.ROTATION_180)
        {
            parameters.setPreviewSize(height, width);               
        }

        if(display.getRotation() == Surface.ROTATION_270)
        {
            parameters.setPreviewSize(width, height);
            mCamera.setDisplayOrientation(180);
        }

        mCamera.setParameters(parameters);
        previewCamera();                      
    }


Answer 3:

另外，检查“自动旋转屏幕”选项，在手机设置检查（设置> Dislay或屏幕 - 取决于Android版）。

我花了相当长一段时间，直到一个想通了。 如果它未被选中，摄像机在应用的方向可以被忽略。



Answer 4:

对于较低的API等级，你可以使用： 

private void setCameraDisplayOrientationAPI8(){
        //Sets the camera right Orientation.
        //Special void for API 8 build.
        //This void should be called before calling camera.setParameters(cameraParameters).
        if (activeActivity.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
        {   
            camera.setDisplayOrientation(90);
        }
        if (activeActivity.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE)
        {                               
            camera.setDisplayOrientation(180);
        }
    }

并调用setCameraDisplayOrientationAPI8(); 您surfaceChanged FUNC。

加： 

private void setCameraDisplayOrientation() {
        //Sets the camera right Orientation.
        //IMPORTANT!! This code is available only for API Level 9 build or greater.
        if (mApiLvl<9){
            Log.d(TAG, "setCameraDisplayOrientation ERROR: This code is available only for API Level 9 build or greater.");
            return;
        }
        android.hardware.Camera.CameraInfo info =
                new android.hardware.Camera.CameraInfo();
        android.hardware.Camera.getCameraInfo(cameraIndex, info);
        int rotation = activeActivity.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);
    }

希望这可以帮助。



文章来源: Android Camera setDisplayOrientation does not work
标签： android android-camera
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