java - IllegalArgumentException:文件包含路径分隔符 Android

Question

我正在尝试写入 HTC One 上的输出文件并在 LogCat 中收到以下消息:

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

源码如下:

    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();
    }

如果有人可以帮助确定问题，我将不胜感激。

Answer 1

openFileInput 方法不接受路径分隔符。('/')

它只接受您要打开/访问的文件的名称。所以改变声明

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

到

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