android camera（二）

先说说我的测试机器：nexus s。以下的结果都是通过nexus s上测试通过。

还是先上代码：

package com.TestCamera1;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.util.List;import android.app.Activity;import android.content.Context;import android.content.pm.ActivityInfo;import android.content.res.Configuration;import android.graphics.Bitmap;import android.graphics.Bitmap.CompressFormat;import android.graphics.BitmapFactory;import android.graphics.Matrix;import android.graphics.PixelFormat;import android.hardware.Camera;import android.hardware.Camera.CameraInfo;import android.hardware.Camera.PictureCallback;import android.os.Bundle;import android.os.Environment;import android.util.Log;import android.view.Display;import android.view.KeyEvent;import android.view.Surface;import android.view.SurfaceHolder;import android.view.View;import android.view.SurfaceHolder.Callback;import android.view.View.OnClickListener;import android.view.SurfaceView;import android.view.Window;import android.view.WindowManager;import android.widget.Button;public class TestCamera1Activity extends Activity {    /** Called when the activity is first created. */	private SurfaceHolder surfaceHolder;    private Camera camera;    private int cameraId;    private SurfaceView surfaceView;    private Button btn;    private boolean flag;    private Camera.PreviewCallback previewCallBack;    //////////////////////////////照相实现函数    private PictureCallback jpeg=new PictureCallback(){    	public void onPictureTaken(byte[] data,Camera camera){    		if(data!=null){    			Log.i("take photo","ok!");    			    			Bitmap bm=BitmapFactory.decodeByteArray(data, 0, data.length);    			String picDirStr=Environment.getExternalStorageDirectory()+"/";    			File picDir=new File(picDirStr);    			if(!picDir.exists()){    				picDir.mkdir();    			}    			String picName=picDirStr+System.currentTimeMillis()+".jpg";    			File myCaptureFile=new File(picName);   			    			try{    				BufferedOutputStream bos=new BufferedOutputStream(new FileOutputStream(myCaptureFile));    				bm.compress(Bitmap.CompressFormat.JPEG, 50, bos);    				bos.flush();    				bos.close();//保存图片    				camera.startPreview();//重新打开预览图，进行下一次的拍照准备，必须等到onPictureCallback函数调用才能调用    				Log.i("pic", "ok!");    			}catch(Exception e){    				Log.i("pic", e.toString());    			}    		}else{    			Log.i("take pic", "faile!");    		}    	}    };    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                          btn=(Button)findViewById(R.id.button1);               surfaceView = (SurfaceView) findViewById(R.id.preview_view);        surfaceHolder = surfaceView.getHolder();               surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);        surfaceView.getHolder().addCallback(new SurfaceViewCallback());                btn.setOnClickListener(new OnClickListener(){			@Override			public void onClick(View v) {				// TODO Auto-generated method stub								camera.takePicture(null, null, jpeg);							}        });    }    private final class SurfaceViewCallback implements SurfaceHolder.Callback {    public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3) {        // TODO Auto-generated method stub    	  Camera.Parameters parameters = camera.getParameters();    	         // 选择合适的预览尺寸       	        List<Camera.Size> sizeList = parameters.getSupportedPreviewSizes();    	        Camera.Size cameraSize=(Camera.Size)sizeList.get(1);    	        parameters.setPreviewSize(cameraSize.width, cameraSize.height);    	        parameters.setPreviewFrameRate(5);    	        parameters.setPictureFormat(PixelFormat.JPEG);           	        parameters.set("jpeg-quality", 100);    	        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {    	            camera.setDisplayOrientation(90);    	            flag=true;    	            Log.i("por","1");    	           }    	           if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {    	            parameters.set("orientation", "landscape");    	            parameters.set("rotation", 0);    	            flag=false;    	            Log.i("orientation", "1");    	           }    	            	        camera.setParameters(parameters);    	        try {    	            camera.setPreviewDisplay(surfaceHolder);    	        } catch (IOException e) {    	            System.out.println(e.getMessage());    	        }    	        camera.startPreview();    }    public void surfaceCreated(SurfaceHolder arg0) {        // TODO Auto-generated method stub        camera = Camera.open();                  }    public void surfaceDestroyed(SurfaceHolder arg0) {        // TODO Auto-generated method stub        if (camera != null) {            camera.stopPreview();        }        camera.release();        camera = null;    }    }   }

1·预览图旋转问题。

if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) {   camera.setDisplayOrientation(90);//将镜头旋转90度。   flag=true;   Log.i("por","1");}if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {    parameters.set("orientation", "landscape");    parameters.set("rotation", 0);    flag=false;    Log.i("orientation", "1");//由于镜头默认是横屏的，所以这里可以为空

}