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Android: Stuck on updating textView in custom adapter

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http://stackoverflow.com – I'm new to programming for Android (and Java) and have managed to get a custom adapter working, but am stuck on how to update textViews inside of it. Below you will see my score_save function with the code I want, but I'm not sure how to apply this to all rows of my adapter at once. public class MainActivity extends Activity { private ListView listView1; private int currentPlayer; private int currentScore; ArrayList<Integer> allScoreChange = new ArrayList<Integer>(); ArrayList<Integer> allScore = new ArrayList<Integer>(); Button button_add, button_add_big, button_sub (HowTos)