Java read file txt

We want to read a txt file, first, use notepad to create a txt file, save it with UTF-8 Encoding.

Create a folder name raw, copy file txt in to it.

In class, we need a textView to show, name it tv.

Copy this lines below findViewById.

InputStream in = this.getResources().openRawResource(R.raw.tho);

     try

      {

     byte[] buffer = new byte[in.available()];

     while (in.read(buffer) != -1);

     String jsontext = new String(buffer);

       tv.setText(jsontext);         

          

     }

   catch (IOException e)

     {

             //return null;

}

Press Ctrl+Shift+O to import libraries.

Run to see the result.

Now we want to read file to lines, add them in to an array.

Declare an arraylist.

ArrayList<String> ar = new ArrayList<String>();

Replace the codes above by this lines.

String line = "";

     try {

InputStream  In = this.getResources().openRawResource(R.raw.tho);

               InputStreamReader inputReader = new InputStreamReader(In);

               BufferedReader BR = new BufferedReader(inputReader);

     while ((line = BR.readLine()) != null) {

          ar.add(line);

     }

BR.close();

} catch (IOException e) {

e.printStackTrace();

}

tv.setText(ar.get(2));

Here we read file to an array and set the third line to textView.