Question

I am creating the app where the players put their names into a program, the program sends their names to the next activity in a String array, and the next program puts the array into a list an then shuffles it. For some reason, everytime I try to use the.setText function, the app gets a nullpointerexception error. I have tested the list with a toast to verify that it is not null, which it is not. Any suggestions?

endInstructions = (Button)findViewById(R.id.buttonEndInstructions);

    player = (TextView)findViewById(R.id.textViewPlayerName);

    endInstructions.setOnClickListener(this);

    Bundle ext = getIntent().getExtras();
    int numberOfPlayers= ext.getInt("numberofplayers");
    String[] sarray = ext.getStringArray("namearray");

    names = Arrays.asList(sarray);
    Collections.shuffle(names);

    Toast.makeText(this, names.get(0), Toast.LENGTH_SHORT).show();

    //player.setText(names.get(0));

Thanks in advance!

Answer 1

There are not a million solutions…

Player is null, you can check that by testing:

 Toast.makeText(this, player, Toast.LENGTH_SHORT).show();

What does that mean? Probably that your current layout does not contains a textview called “textViewPlayerName”

Please double check your xml layout or be sure that you used setContentView before 😉

Edit: as endInstructions is not null regarding your code, you corretly used setContentView before…