问摄像机预览失真

EN

import android.app.Fragment;
import android.content.res.Configuration;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.*;
import android.widget.

import java.io.IOException;
import java.util.List;


public class CameraFragment extends Fragment implements SurfaceHolder.Callback,       Camera.PictureCallback, Camera.PreviewCallback, Camera.AutoFocusCallback,   View.OnClickListener {

private Camera mCamera;
private SurfaceHolder mSurfaceHolder;
private SurfaceView mPreview;
private ImageButton mTakePicture;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View v = inflater.inflate(R.layout.camera_fragment, container, false);

    mPreview = (SurfaceView) v.findViewById(R.id.svCameraView);

    mSurfaceHolder = mPreview.getHolder();
    mSurfaceHolder.addCallback(this);
    mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    mTakePicture = (ImageButton) v.findViewById(R.id.ibTakePicture);
    mTakePicture.setOnClickListener(takePictureOnClickListener);

    ImageButton switchCameraButton = (ImageButton) v.findViewById(R.id.ibSwitchCamera);
    switchCameraButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {

        }
    });

    return v;
}

View.OnClickListener takePictureOnClickListener = new View.OnClickListener() {
    @Override
    public void onClick(View view) {

    }
};


@Override
public void onResume() {
    super.onResume();
    mCamera = Camera.open();
}

@Override
public void onPause() {
    super.onPause();

    if (mCamera != null) {
        mCamera.setPreviewCallback(null);
        mCamera.stopPreview();
        mCamera.release();
        mCamera = null;
    }
}

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
    try {
        mCamera.setPreviewDisplay(holder);
        mCamera.setPreviewCallback(this);
    } catch (IOException e) {
        e.printStackTrace();
        return;
    }

    Camera.Parameters parameters = mCamera.getParameters();

    List<String> flashModes = parameters.getSupportedFlashModes();
    /*if (flashModes != null && flashModes.contains(Camera.Parameters.FLASH_MODE_OFF))
        parameters.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);*/

    List<String> whiteBalance = parameters.getSupportedWhiteBalance();
    if (whiteBalance != null && whiteBalance.contains(Camera.Parameters.WHITE_BALANCE_AUTO))
        parameters.setWhiteBalance(Camera.Parameters.WHITE_BALANCE_AUTO);

    List<String> focusModes = parameters.getSupportedFocusModes();
    if (focusModes != null && focusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO))
        parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);

    List<Camera.Size> sizes = parameters.getSupportedPictureSizes();
    /*if (sizes != null && sizes.size() > 0) {
        Camera.Size size = sizes.get(0);
        parameters.setPictureSize(size.width, size.height);
    }*/

    List<Camera.Size> previewSizes = parameters.getSupportedPreviewSizes();
    /*if (previewSizes != null) {
        Camera.Size previewSize = previewSizes.get(previewSizes.size() - 1);
        parameters.setPreviewSize(previewSize.width, previewSize.height);
    }*/

    Camera.Size previewSize = mCamera.getParameters().getPreviewSize();
    float aspect = (float) previewSize.width / previewSize.height;

    int previewSurfaceWidth = mPreview.getWidth();
    int previewSurfaceHeight = mPreview.getHeight();

    ViewGroup.LayoutParams lp = mPreview.getLayoutParams();

    if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
        mCamera.setDisplayOrientation(90);
        lp.height = previewSurfaceHeight;
        lp.width = (int) (previewSurfaceHeight / aspect);
    } else {
        mCamera.setDisplayOrientation(0);
        lp.width = previewSurfaceWidth;
        lp.height = (int) (previewSurfaceWidth / aspect);
    }

    mPreview.setLayoutParams(lp);
    mCamera.setParameters(parameters);
    mCamera.startPreview();
}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
}

@Override
public void onClick(View v) {
    if (v == mTakePicture) {

        //mCamera.takePicture(null, null, null, this);
        mCamera.autoFocus(this);
    }
}

@Override
public void onPictureTaken(byte[] paramArrayOfByte, Camera paramCamera) {
    paramCamera.startPreview();
}

@Override
public void onAutoFocus(boolean paramBoolean, Camera paramCamera) {
    if (paramBoolean) {
        paramCamera.takePicture(null, null, null, this);
    }
}

@Override
public void onPreviewFrame(byte[] paramArrayOfByte, Camera paramCamera) {
}