android 获得最近一次拍照 截屏 下载等，的图片路径

	/**
	 * 	  本次查询的就是针对 相机里面的图片进行搜查,获得最近一排的一张照片,的路径
	 * @param path =/storage/emulated/0/DCIM/Camera  默认值; 路径为空时：默认值
	 * @param name =head.jpg						这个不能为空
	 * 
	 * @param path_name  eg:=  /storage/emulated/0/DCIM/Camera/head.jpg
	 * @return
	 */
	public static String getLastPhotoByPath(Context context) {
//		if (!TextUtils.isEmpty(path)) {
//			path=String.valueOf(path.toLowerCase().hashCode());
//		}else {
//			String cameraPath=Environment.getExternalStorageDirectory().toString() + "/DCIM/Camera";
//			path=String.valueOf(cameraPath.toLowerCase().hashCode());
//		}
		Cursor myCursor = null;
		String pathLast="";
			// Create a Cursor to obtain the file Path for the large image
			String[] largeFileProjection = {
					MediaStore.Images.ImageColumns._ID,
					MediaStore.Images.ImageColumns.DATA,
					MediaStore.Images.ImageColumns.ORIENTATION,
					MediaStore.Images.ImageColumns.DATE_TAKEN };
			String largeFileSort = MediaStore.Images.ImageColumns._ID + " DESC";
			myCursor = 
//					BaseApplication.getInstance().
					context.getContentResolver().query(
					MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
					largeFileProjection, null, null, largeFileSort);
		
		if (myCursor.getCount()<1) {
				myCursor.close();
				return pathLast;
		}
		while (myCursor.moveToNext()) {
			String data = myCursor.getString(myCursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA));
			File f = new File(data);
			if (f.exists()) {//第一个图片文件，就是最近一次拍照的文件；
				pathLast=f.getPath();
				System.out.println("f.getPath() = "+pathLast);
				myCursor.close();
				return pathLast;
			}
		}
		myCursor.close();
		return pathLast;

	}