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POAndroid: Stuck on updating textView in custom adapter
 

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  1. POAndroid: Stuck on updating textView in custom adapter
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    <p>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.</p> <pre><code>public class MainActivity extends Activity { private ListView listView1; private int currentPlayer; private int currentScore; ArrayList&lt;Integer&gt; allScoreChange = new ArrayList&lt;Integer&gt;(); ArrayList&lt;Integer&gt; allScore = new ArrayList&lt;Integer&gt;(); Button button_add, button_add_big, button_sub, button_sub_big, button_add_num, button_save; TextView name; TextView score; TextView scoreChange; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); Score score_data[] = new Score[] { new Score("NameA"), new Score("NameB"), new Score("NameC"), new Score("NameD"), new Score("NameE") }; //sets score lists to 0 for (int i = 0; i &lt; 5; i++) { allScoreChange.add(0); allScore.add(0); } ScoreAdapter adapter = new ScoreAdapter(this, R.layout.listview_item_row, score_data); listView1 = (ListView) findViewById(R.id.listView1); listView1.setAdapter(adapter); listView1.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { currentScore = allScoreChange.get(position); // Gets fields from current row score = (TextView) view.findViewById(R.id.txtScore); scoreChange = (TextView) view.findViewById(R.id.txtScoreChange); currentPlayer = position; } }); button_save.setOnClickListener(new OnClickListener() { public void onClick(View v) { score_save(); } }); } public void score_save() { // this needs to go through all rows of listview currentPlayer = 0; // update array with new score allScore.set(currentPlayer, allScore.get(currentPlayer) + allScoreChange.get(currentPlayer)); // display new score score.setText(allScore.get(currentPlayer)); // reset score change to zero allScoreChange.set(currentPlayer, 0); // display score change as blank scoreChange.setText(""); } } </code></pre> <p>Here's the XML for the row, I want to update txtScoreChange and txtScore with the values out of the allScoreChange and allScore ArrayLists. I cut out the code that defines these lists, in case you're wondering.</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="horizontal" android:padding="10dp" &gt; &lt;TextView android:id="@+id/txtTitle" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginBottom="5dp" android:layout_marginTop="5dp" android:layout_weight="70" android:text="Name" android:textColor="#000000" android:textSize="22sp" android:textStyle="bold" /&gt; &lt;TextView android:id="@+id/txtScoreChange" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginBottom="5dp" android:layout_marginRight="5dp" android:layout_marginTop="5dp" android:layout_weight="15" android:textColor="#ff0000" android:textSize="22sp" android:gravity="right" /&gt; &lt;TextView android:id="@+id/txtScore" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_marginBottom="5dp" android:layout_marginRight="5dp" android:layout_marginTop="5dp" android:layout_weight="15" android:text="1" android:textColor="#666666" android:textSize="22sp" android:gravity="right" /&gt; </code></pre> <p></p> <p>Here's my adapter:</p> <pre><code>public class ScoreAdapter extends ArrayAdapter&lt;Score&gt;{ Context context; int layoutResourceId; Score data[] = null; public ScoreAdapter(Context context, int layoutResourceId, Score[] data) { super(context, layoutResourceId, data); this.layoutResourceId = layoutResourceId; this.context = context; this.data = data; } @Override public View getView(int position, View convertView, ViewGroup parent) { View row = convertView; ScoreHolder holder = null; if(row == null) { LayoutInflater inflater = ((Activity)context).getLayoutInflater(); row = inflater.inflate(layoutResourceId, parent, false); holder = new ScoreHolder(); holder.txtScore = (TextView)row.findViewById(R.id.txtScore); holder.txtScoreChange = (TextView)row.findViewById(R.id.txtScoreChange); holder.txtName = (TextView)row.findViewById(R.id.txtName); row.setTag(holder); } else { holder = (ScoreHolder)row.getTag(); } Score scoreData = data[position]; holder.txtName.setText(scoreData.name); holder.txtScore.setText(scoreData.score); return row; } static class ScoreHolder { TextView txtScore; TextView txtName; TextView txtScoreChange; } } </code></pre>
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