适用于新手的Android相机定位

Question

I am working with a camera and facing problem in camera orientation . I have found some answer over internet and I think this answer might be best fit for me.

Can anybody give me detail instruction, how to add this answer in my camera project.?

Here is my Full camera project Code.

Direct code here

public class AndroidCamera extends Activity implements SurfaceHolder.Callback{

 Camera camera;
 SurfaceView surfaceView;
 SurfaceHolder surfaceHolder;
 boolean previewing = false;
 LayoutInflater controlInflater = null;

 Button buttonTakePicture;



 final int RESULT_SAVEIMAGE = 0;

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


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


       controlInflater = LayoutInflater.from(getBaseContext());
       View viewControl = controlInflater.inflate(R.layout.control, null);
       LayoutParams layoutParamsControl
        = new LayoutParams(LayoutParams.FILL_PARENT,
        LayoutParams.FILL_PARENT);
       this.addContentView(viewControl, layoutParamsControl);


       buttonTakePicture = (Button)findViewById(R.id.takepicture);
       buttonTakePicture.setOnClickListener(new Button.OnClickListener(){

   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub
    camera.takePicture(myShutterCallback,
      myPictureCallback_RAW, myPictureCallback_JPG);
   }});

       LinearLayout layoutBackground = (LinearLayout)findViewById(R.id.background);
       layoutBackground.setOnClickListener(new LinearLayout.OnClickListener(){


   @Override
   public void onClick(View arg0) {
    // TODO Auto-generated method stub

    buttonTakePicture.setEnabled(false);
    camera.autoFocus(myAutoFocusCallback);
   }});
   }

   AutoFocusCallback myAutoFocusCallback = new AutoFocusCallback(){

  @Override
  public void onAutoFocus(boolean arg0, Camera arg1) {
   // TODO Auto-generated method stub
   buttonTakePicture.setEnabled(true);
  }};

   ShutterCallback myShutterCallback = new ShutterCallback(){

  @Override
  public void onShutter() {
   // TODO Auto-generated method stub

  }};

 PictureCallback myPictureCallback_RAW = new PictureCallback(){

  @Override
  public void onPictureTaken(byte[] arg0, Camera arg1) {
   // TODO Auto-generated method stub

  }};

 PictureCallback myPictureCallback_JPG = new PictureCallback(){

  @Override
  public void onPictureTaken(byte[] arg0, Camera arg1) {
   // TODO Auto-generated method stub
   /*Bitmap bitmapPicture
    = BitmapFactory.decodeByteArray(arg0, 0, arg0.length); */

   Uri uriTarget = getContentResolver().insert(Media.EXTERNAL_CONTENT_URI, new ContentValues());

   OutputStream imageFileOS;
   try {
    imageFileOS = getContentResolver().openOutputStream(uriTarget);
    imageFileOS.write(arg0);
    imageFileOS.flush();
    imageFileOS.close();

    Toast.makeText(AndroidCamera.this,
      "Image saved",
      Toast.LENGTH_SHORT).show();

   } catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }

   camera.startPreview();
  }};

 @Override
 public void surfaceChanged(SurfaceHolder holder, int format, int width,
   int height) {
  // TODO Auto-generated method stub
  if(previewing){
   camera.stopPreview();
   previewing = false;
  }

  if (camera != null){
   try {
    camera.setPreviewDisplay(surfaceHolder);  
    camera.startPreview();
    previewing = true;
   } catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
   }
  }
 }



 @Override
 public void surfaceCreated(SurfaceHolder holder) {
  // TODO Auto-generated method stub
  camera = Camera.open();
 }

 @Override
 public void surfaceDestroyed(SurfaceHolder holder) {
  // TODO Auto-generated method stub
  camera.stopPreview();
  camera.release();
  camera = null;
  previewing = false;
 }
}

Answer 1

In order to fix your camera's orientation changed your surfaceCreated function to rotate the camera from the default android camera default of landscape mode to portait mode (because your activity is in portrait mode):

@Override
public void surfaceCreated(SurfaceHolder holder) {
   camera = Camera.open();
   Parameters parameters = camera.getParameters();
   camera.setDisplayOrientation(90);
   camera.setParameters(parameters);
}

Your app also crashes when you try and take a picture... but that is not the issue at hand... though it might have to do with you needing to add the following line to your manifest:

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

:)