android java 文件操作

 

按行读取文件中内容:

   public  static List<String> read()
    {
        List<String>  _list = new ArrayList<String>();
        String sdpath=getInnerSDCardPath();
        String filterpath = sdpath+"/filter";
        File f = new File(filterpath);
        BufferedReader reader = null;
        String tempstr  =null;
        try
        {
            reader = new BufferedReader(new FileReader(f));
            tempstr =reader.readLine();
            while (null!=tempstr)
            {
                _list.add(tempstr);
            }

        } catch (FileNotFoundException e)
        {
            e.printStackTrace();
        } catch (IOException e)
        {
            e.printStackTrace();
        }


        return  _list;
    }

 

读取sdk上的内容:

1.加入权限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />  

public static String getInnerSDCardPath() {
    return Environment.getExternalStorageDirectory().getPath();
}