[java] Get the directory from a file path in java (android)

I have got solution on this after 4 days, Please note following points while giving path to File class in Android(Java):

  1. Use path for internal storage String path="/storage/sdcard0/myfile.txt";
  2. path="/storage/sdcard1/myfile.txt";
  3. mention permissions in Manifest file.

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

  4. First check file length for confirmation.
  5. Check paths in ES File Explorer regarding sdcard0 & sdcard1 is this same or else......

e.g.

File file=new File(path);
long=file.length();//in Bytes

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