Android创建文件异常EACCES（权限被拒绝）

Question

我无法写入android设备或仿真器的内部存储。 我可以写入外部存储目录中的文件。

我在createNewFile调用中收到此异常EACCES（权限被拒绝）。

WRITE_EXTERNAL_STORAGE权限在我的清单中正确的位置

public static Boolean writeFile(String filename, String data)
{
      try 
      {
        File file = new File(filename);
        // If file does not exists, then create it
        if (!file.exists()) 
        {
            Log.d("MyLog","file doesn't exist, creating");
            file.getParentFile().mkdirs();
            file.createNewFile();
        }

        FileWriter fw = new FileWriter(file.getAbsoluteFile());
        BufferedWriter bw = new BufferedWriter(fw);
        bw.write(data);
        bw.close();

        //Log.d("Success","Success");
        return true;
      } 
      catch (IOException e) 
      {
        e.printStackTrace();
        Log.d("MyLog","writeFile fail, error:"+e.getMessage());
        return false;
      }
}

我尝试了许多路径：

filename=Environment.getRootDirectory()+"/"+"test.dat";
filename=Environment.getDataDirectory()+"/"+"test.dat";
filename="data/data/com.android.emsi/testnew.txt";

唯一起作用的是：filename = Environment.getExternalStorageDirectory（）+“ /” +“ test.dat”;

Answer 1

尝试这个

String filename = "myfile";
String string = "Hello world!";
FileOutputStream outputStream;

try {
outputStream = openFileOutput(filename, Context.MODE_PRIVATE);
outputStream.write(string.getBytes());
outputStream.close();
} catch (Exception e) {
e.printStackTrace();
}