TextView adding a variable string and appending another - android-edittext

Question

I am using IntentExtra to pass three variables from an entry in a RecyclerView from one Activity into a TextView on another Activity (ActivityTwo) using Get Extras. That all works fine and the variables are joined and displayed in the TextView.
TextView mTitle = (TextView) findViewById(R.id.textViewOrderList);
mTitle.append(number + title + (Double) price);
I then navigate back to ActivityOne, select a different item in the RecyclerView and the new variables are sent to ActivityTwo.
However, despite using append, it either a/ overwrites the existing text, OR b/the first set of text is not retained. Am not sure which
I did consider saving the text to a local file and then appending to it each time I enter ActivityTwo. Then loading it into the TextView But this feels like using a steamroller to crack a nut!!
Any solutions much appreciated.

Answer 1

In the end I decided to write to a local file. As I wanted to Append info rather than overwrite I used the MODE_APPEND rather than MODE_PRIVATE.
try {
FileOutputStream fOut = openFileOutput(fileTitle,MODE_APPEND);
fOut.write(dataTitle.getBytes());
fOut.write('\n');
fOut.close();
Toast.makeText(getBaseContext(),"file saved",Toast.LENGTH_SHORT).show();
}
catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});