android 调用前摄像头开展拍照的方法及完整例子

android调用camera时，可以自己写一个activity，赋上相关参数，打开前camera就可以了；

需要申请的permission，在AndroidManifest.xml中添加：

        <uses-permission android:name="android.permission.CAMERA" />	<uses-feature android:name="android.hardware.camera" android:required="false" />	<uses-feature android:name="android.hardware.camera.front" android:required="false" />	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />

	private Camera openFrontFacingCameraGingerbread() {	    int cameraCount = 0;	    Camera cam = null;	    Camera.CameraInfo cameraInfo = new Camera.CameraInfo();	    cameraCount = Camera.getNumberOfCameras();	    	    for (int camIdx = 0; camIdx < cameraCount; camIdx++) {	        Camera.getCameraInfo(camIdx, cameraInfo);	        if (cameraInfo.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {	            try {	                cam = Camera.open(camIdx);	                mCurrentCamIndex = camIdx;	            } catch (RuntimeException e) {	                Log.e(TAG, "Camera failed to open: " + e.getLocalizedMessage());	            }	        }	    }	    return cam;	}

		//根据横竖屏自动调节preview方向，Starting from API level 14, this method can be called when preview is active.	private static void setCameraDisplayOrientation(Activity activity,int cameraId, Camera camera) 	{    		   Camera.CameraInfo info = new Camera.CameraInfo(); 	       Camera.getCameraInfo(cameraId, info);      	       int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();	       	       //degrees  the angle that the picture will be rotated clockwise. Valid values are 0, 90, 180, and 270. 	       //The starting position is 0 (landscape). 	       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);  	} 

本博文关联的源码下载： http://download.csdn.net/detail/changliangdoscript/7446287