android 删除SD卡或手机的缓存图像和文件夹

        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文件夹
	     */
	    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();
	   }  



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