摘要：
public String getUrl(){ File file=new File(mUrlPath); String content=""; if(file.exists()){ InputStream instream; try { instream = new FileInputStream 阅读全文
摘要：
1.首先要判断手机中是否有SD卡 String status=Environment.getExternalStorageState(); if(status.equals(Environment.MEDIA_MOUNTED)){ return true; }else{ return false; 阅读全文