[問題] android 相機問題

[poo925 (猴子)]

各位大大好
我第一次PO文
不太會排版請大家見諒
想請問
在實作簡易的相機程式時
為何手機用直立式時在預覽畫面都會跟手機成90度的差別
GOOGLE一下好像要加上setDisplayOrientation()
但不知道要加在哪裡
想請各位高手幫我解惑
謝謝
程式碼如下

package tw.brad.android.camera;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.SurfaceHolder.Callback;
import android.view.View.OnClickListener;
import android.widget.Toast;

public class CameraTest extends Activity implements Callback, OnClickListener
{
    private Camera camera;
    private SurfaceView surface;
    private Parameters param;
    private SurfaceHolder holder;
    private int previewWidth = 480;
    private int previewHeight = 320;

 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

        surface = (SurfaceView)findViewById(R.id.surface);

surface.setOnClickListener(this);
        holder = surface.getHolder();
        holder.addCallback(this);
        holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

    @Override
        public void finish() {
                super.finish();
                surfaceDestroyed(holder);
    }

private void resetCamera(){
                if (camera!= null){
                camera.stopPreview();
                camera.release();
                camera = null;
                }
                try{
                        camera = Camera.open();
                param = camera.getParameters();

                param.setPreviewSize(previewWidth, previewHeight);
                param.setPictureFormat(PixelFormat.JPEG);
                param.setPictureSize(previewWidth, previewHeight);
                try{
                        camera = Camera.open();
                param = camera.getParameters();

                param.setPreviewSize(previewWidth, previewHeight);
                param.setPictureFormat(PixelFormat.JPEG);
                param.setPictureSize(previewWidth, previewHeight);
                try {
                                camera.setPreviewDisplay(holder);
                                camera.startPreview();
                        } catch (IOException e) {
                        }
                }catch(Exception ee){
                }
    }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width,
                        int height) {
        }
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
                camera.setDisplayOrientation(90);
                resetCamera();
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
                if (camera!= null){
                camera.stopPreview();
                camera.release();
                camera = null;
                }
        }

        @Override
        public void onClick(View v) {
                camera.takePicture(new MyShutter(), new rawPictureCallback(), new
jpegPictureCallback());
        }
        private class rawPictureCallback implements PictureCallback {
                @Override
                public void onPictureTaken(byte[] data, Camera camera) {
                        Log.i("CameraTest", "raw PictureTaken");
                }

        }

        private class jpegPictureCallback implements PictureCallback {

                @Override
                public void onPictureTaken(byte[] data, Camera camera) {
                        Log.i("CameraTest", "jpeg PictureTaken");
                        File root = Environment.getExternalStorageDirectory();
                        Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
                        File jpeg = new File(root.getAbsoluteFile() + "/mytest.jpg");
                        try {
                                BufferedOutputStream bout = new BufferedOutputStream(new
FileOutputStream(jpeg));
                                bitmap.compress(Bitmap.CompressFormat.JPEG, 85, bout);
                                bout.flush();
                                bout.close();
                        } catch (FileNotFoundException e) {
                                Toast.makeText(CameraTest.this, "FileNotFound", 2000).show();
                        } catch (IOException e) {
                                Toast.makeText(CameraTest.this, "I/O Exception", 2000).show();
                        }
resetCamera();
                }

        }
        private class MyShutter implements ShutterCallback {
                @Override
                public void onShutter() {
                        Log.i("CameraTest", "onShutter");
                }

        }
}

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