IllegalArgumentException：文件包含路径分隔符Android [英] IllegalArgumentException: File contains a path separator Android

问题描述

$ b

11- 21 08：05：18.228：W / System.err（6609）：java.lang.IllegalArgumentException：File /storage/emulated/0/com.example.pattern1/myfile.txt包含路径分隔符

源代码如下：

  protected void writeToFile （String string）{
 
文件patternDirectory = new File（Environment.getExternalStorageDirectory（）。getAbsolutePath（）。toString（）+/ com.example.pattern1 / myfile.txt）; 
 patternDirectory.mkdirs（）; 
 
 FileOutputStream outputStream; 
 
 try {
 outputStream = openFileOutput（patternDirectory.getAbsolutePath（）。toString（），Context.MODE_APPEND）; 
 outputStream.write（string.getBytes（））; 
 TextView t =（TextView）findViewById（R.id.bottomMidText）; 
 t.setText（patternDirectory.getAbsolutePath（）。toString（））; 
 outputStream.close（）; 
 
 catch（Exception e）{
 e.printStackTrace（）; 
} 
  

如果有人能够帮助识别问题，我将不胜感激。 b $ b

解决方案

openFileInput方法不会接受路径分隔符（'/'）

只接受您要打开/访问的文件的名称。所以改变语句

  outputStream = openFileOutput（patternDirectory.getAbsolutePath（）。toString（），Context.MODE_APPEND）; 
  

到

  outputStream = new FileOutputStream（new File（patternDirectory.getAbsolutePath（）。toString（）），true）; // true将与Context.MODE_APPEND相同
  

I'm trying to write to an output file on my HTC One and get the following message in the LogCat:

11-21 08:05:18.228: W/System.err(6609): java.lang.IllegalArgumentException: File /storage/emulated/0/com.example.pattern1/myfile.txt contains a path separator

The source code is given below:

    protected void writeToFile(String string){

    File patternDirectory = new File(Environment.getExternalStorageDirectory().getAbsolutePath().toString()+"/com.example.pattern1/myfile.txt");
    patternDirectory.mkdirs();

    FileOutputStream outputStream;

    try {
      outputStream = openFileOutput(patternDirectory.getAbsolutePath().toString(), Context.MODE_APPEND);
      outputStream.write(string.getBytes());
      TextView t = (TextView)findViewById(R.id.bottomMidText);
      t.setText(patternDirectory.getAbsolutePath().toString());
      outputStream.close();

    } catch (Exception e) {
      e.printStackTrace();
    }

I would appreciate if someone can help identify the problem.

解决方案

The openFileInput method will not accept path separators.('/')

it accepts only the name of the file which you want to open/access. so change the statement

outputStream = openFileOutput(patternDirectory.getAbsolutePath().toString(), Context.MODE_APPEND);

to

outputStream = new FileOutputStream (new File(patternDirectory.getAbsolutePath().toString()), true); // true will be same as Context.MODE_APPEND

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