读取文件中的机器人 - 文件权限被拒绝 [英] Read file in android - file permission denied

问题描述

我想读取外部存储文件。我上传的文件在Eclipse DDMS存储/ SD卡（如下图所示）。但每当我试图读取，我得到了拒绝的权限的错误。有没有在我的文件权限什么问题？或者，我需要在manifest文件添加任何东西（我不是写在此刻什么）？

任何帮助将AP preciated。

code：

 公共无效extimport（视图v）{
   的EditText xedittxt =（EditText上）findViewById（R.id.frmexttxt）;
   。字符串XEDIT = xedittxt.getText（）的toString（）;
   XEDIT = xedit.trim（）;
   档案文件;
   文件=新的文件（XEDIT）;
   StringBuilder的文本=新的StringBuilder（）;
   Log.d（F确认，+ XEDIT）;
   尝试{
      BR的BufferedReader =新的BufferedReader（新的FileReader（文件））; //此行会抛出错误
      Log.d（F确认，F3）; //此行从未被印
      串线;
      而（（行= br.readLine（））！= NULL）{
         text.append（线）;
         text.append（'\\ n'）;
      }
      br.close（）;
      resultView =（的TextView）findViewById（R.id.header）;
      resultView.setText（文本）;
   }
   赶上（IOException异常五）{
      Log.d（文件打开错误，+ E）;
      Toast.makeText（getApplicationContext（），打开文件错误。，Toast.LENGTH_SHORT）.show（）;
   }
}
 

LogCat中：

  11-19 00：21：54.252：D / F确认（5885）：/storage/sdcard/mylibman.csv
11-19 00：21：54.272：D /文件打开错误（5885）：java.io.FileNotFoundException：/storage/sdcard/mylibman.csv：打开失败：EACCES（权限被拒绝）
 

解决方案

请确保您已经添加到阅读清单档案中的外部存储的权限。

 ＆LT;使用许可权的android：NAME =android.permission.READ_EXTERNAL_STORAG​​E/＆GT;
 

I want to read file from external storage. I uploaded the file in Eclipse DDMS to storage/sdcard (image below). But whenever I tried to read, I got an error of permission denied. Is there any problem in my file permission? Or I need to add anything in manifest file (I am not writing anything at the moment)?

Any help will be appreciated.

Code:

public void extimport(View v){
   EditText xedittxt = (EditText) findViewById(R.id.frmexttxt);
   String xedit = xedittxt.getText().toString();
   xedit = xedit.trim();
   File file;
   file = new File(xedit);
   StringBuilder text = new StringBuilder();
   Log.d("fcheck",""+xedit);
   try {
      BufferedReader br = new BufferedReader(new FileReader(file)); //THIS LINE THROWS ERROR
      Log.d("fcheck","f3"); //This line never got printed
      String line;
      while ((line = br.readLine()) != null) {
         text.append(line);
         text.append('\n');
      }
      br.close();
      resultView = (TextView) findViewById(R.id.header);
      resultView.setText(text);
   }
   catch (IOException e) {
      Log.d("File open error",""+e);
      Toast.makeText(getApplicationContext(), "Error opening the file.", Toast.LENGTH_SHORT).show();
   }
}

LogCat:

11-19 00:21:54.252: D/fcheck(5885): /storage/sdcard/mylibman.csv
11-19 00:21:54.272: D/File open error(5885): java.io.FileNotFoundException: /storage/sdcard/mylibman.csv: open failed: EACCES (Permission denied)

解决方案

Make sure you have added the permission to read external storage in your manifest file.

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

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