android 剔除SD卡或者手机的缓存图片和目录

        public static final String TEMP_PHOTO_FILE_NAME = "temp_photo.jpg";

	private static String mSdRootPath = Environment.getExternalStorageDirectory().getPath();  	  /** 	     * 删除SD卡或者手机的缓存图片和目录 	     */  	    public void deleteFile() {  	    	Log.i("INFO", mSdRootPath+"/"+TEMP_PHOTO_FILE_NAME+"========================");	        File dirFile = new File(mSdRootPath+"/"+TEMP_PHOTO_FILE_NAME);  	       if(! dirFile.exists()){  	           return;  	        }  	        if (dirFile.isDirectory()) {  	            String[] children = dirFile.list();  	            for (int i = 0; i < children.length; i++) {  	                new File(dirFile, children[i]).delete();  	            }  	        }  	         	        dirFile.delete();  	   }