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POListView with conditional formatting doesn't work properly(using a ViewBinder)
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  1. POListView with conditional formatting doesn't work properly(using a ViewBinder)
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    copied!<p><strong>Auxiliary Problem</strong></p> <p>Hi, could anyone please help me understand the behavior of <code>SimpleCursorAdapter.ViewBinder.setViewValue</code>?</p> <p>It seems that it is called more than once for each row in the <code>ListView</code>. Does the number of calls depend on the number of rows in the ListView? Or number of items in the cursor of <code>SimpleCursorAdapter</code>? Also, what are the significance of the parameters passed to the function?</p> <h2>Main Problem</h2> <p>I'm having this strange problem while trying to create a simple <code>ListView</code> of <code>CheckedTextViews</code>. I wanted to reduce the opacity of the rows which are checked. The code I wrote worked, except that it will always reduce the opacity of one extra row. </p> <p>Making the layout_height of the <code>ListView</code> to match_parent solved the issue for some cases. But the problem still persists when I open the keyboard for editing and the ListView somehow gets required.</p> <hr> <p>Please find the codes here </p> <p>Code to fill the items in <code>ListActivity</code>:</p> <pre><code>private void fillDataToList() { Cursor all_taskCursorCursor = mDbHelper.fetchAllTask(); startManagingCursor(all_taskCursorCursor); String[] from = new String[]{TaskDbAdapter.KEY_TITLE}; int[] to = new int[]{R.id.task_title}; SimpleCursorAdapter tasks = new SimpleCursorAdapter(this, R.layout.task_row, all_taskCursorCursor, from, to); tasks.setViewBinder(new ViewBinder() { public boolean setViewValue(View view, Cursor cursor, int columnIndex) { if(columnIndex == 1) { CheckedTextView ctv = (CheckedTextView) view; String text = cursor.getString(cursor.getColumnIndexOrThrow(TaskDbAdapter.KEY_TITLE)); boolean checked = cursor.getInt(cursor.getColumnIndexOrThrow(TaskDbAdapter.KEY_COMPLETED)) == 1 ? true : false; ctv.setText(text); ctv.setChecked(checked); if (checked == true) { AlphaAnimation animation = new AlphaAnimation(1, 0.25f); animation.setFillAfter(true); ctv.setAnimation(animation); ctv.setPaintFlags(Paint.STRIKE_THRU_TEXT_FLAG); } return true; } return false; } }); setListAdapter(tasks); } </code></pre> <p>The layout of ListView - </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="vertical" &gt; &lt;ListView android:id="@android:id/list" android:layout_width="match_parent" android:layout_height="match_parent" &gt; &lt;/ListView&gt; &lt;TextView android:id="@android:id/empty" android:layout_width="fill_parent" android:layout_height="fill_parent" android:text="@string/no_task" android:padding="10dp" android:gravity="center_vertical|center_horizontal" android:textAppearance="?android:attr/textAppearanceMedium" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>Layout for each row -</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" &gt; &lt;CheckedTextView android:id="@+id/task_title" android:layout_width="fill_parent" android:layout_height="50dp" android:padding="10dp" android:textAppearance="?android:attr/textAppearanceMedium" android:checkMark="?android:attr/listChoiceIndicatorMultiple" /&gt; &lt;/LinearLayout&gt; </code></pre>
 

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