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POAndroid: fastScrollEnabled not working at first
 

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  1. POAndroid: fastScrollEnabled not working at first
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    <p>OK, I am working on an App that has a page with a listview and a edittext box at top. As you type things into the edittext box it will filter what items are shown in the listview. The problem I am having is with the fast scroll icon that appears on the side of the slider.<br> When the page first loads NO MATTER what I do the fast scroll slider icon will not appear on the screen. Then I click in the edit text box and type one character and then erase it and now my fast scroll slider icon will appear.<br> <br> First load no fast scroll icon.<br> <img src="https://i.stack.imgur.com/rnfdi.png" alt="no fast scroll icon"> <br> Edittext box and then erase text and fast scroll icon appears.<br> <img src="https://i.stack.imgur.com/2DLOd.png" alt="fast scroll appears"></p> <p><br> I have the android:fastScrollEnabled="true" set in my listview. Plus I have set it manually in the code by doing lv1.setFastScrollEnabled(true);</p> <p>No matter I change I still get the same behavior, unless I remove it complete from the code and xml and then it will stop working on the second page. I have tried cleaning my project and still no good. I am leaning towards it being a bug in android or I am missing something extremely simple.<br> <br> Here is my code. </p> <pre><code>public class SearchByFood extends ParentClass { private ListView lv1; private EditText ed; int textlength = 0; private ArrayList&lt;String&gt; arr_sort = new ArrayList&lt;String&gt;(); private ArrayList&lt;String&gt; foods = new ArrayList&lt;String&gt;(); private LayoutInflater mInflater; private ArrayList&lt;Food&gt; foodList; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.search_by_food); setTextTitle("Search by Food"); lv1 = (ListView) findViewById(R.id.ListView01); ed = (EditText) findViewById(R.id.EditText01); mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); DataLayerFunctions d = new DataLayerFunctions(getApplicationContext()); foodList = d.selectFoodsWithSubstitutes(); for (Food f : foodList) { // this is to build a ArrayList&lt;String&gt; to pass to the setAdapter Log.d("SearchByFood", "FoodName: " + f.getFood_Name()); foods.add(f.getFood_Name()); } ArrayAdapter&lt;String&gt; firstAdapter = new ArrayAdapter&lt;String&gt;(SearchByFood.this, R.layout.search_food_listview, foods); lv1.setAdapter(firstAdapter); lv1.setFastScrollEnabled(true); ed.addTextChangedListener(new TextWatcher() { public void afterTextChanged(Editable s) { } public void beforeTextChanged(CharSequence s, int start, int count, int after) { } public void onTextChanged(CharSequence s, int start, int before, int count) { textlength = ed.getText().length(); arr_sort.clear(); for (String f : foods) { if (textlength &lt;= f.length()) { if (f.toString().toLowerCase().contains((CharSequence) ed.getText().toString().toLowerCase())) { Log.d("STRING", "STRING: " + f.toString() + " contains " + ed.getText()); if (ed.getText().length() &gt; 0) { String newString = boldMyString(f, ed.getText().toString()); arr_sort.add(newString); } else { arr_sort.add(f); } } } } // if empty add a no foods found if (arr_sort.isEmpty()) { arr_sort.add("No Foods Found"); } // Load array // lv1.setAdapter(new ArrayAdapter&lt;String&gt; adapter = new ArrayAdapter&lt;String&gt;(SearchByFood.this, R.layout.search_food_listview, arr_sort) { @Override public View getView(int position, View convertView, ViewGroup parent) { View row; if (null == convertView) { row = mInflater.inflate(R.layout.search_food_listview, null); } else { row = convertView; } TextView tv = (TextView) row.findViewById(android.R.id.text1); tv.setText(Html.fromHtml(getItem(position))); // tv.setText(getItem(position)); return row; } }; lv1.setAdapter(adapter); } private String boldMyString(String foodName, String guess) { int gLength = guess.length(); ArrayList&lt;Integer&gt; results = new ArrayList&lt;Integer&gt;(); for (int i = foodName.toLowerCase().indexOf(guess.toLowerCase()); i &gt;= 0; i = foodName.toLowerCase() .indexOf(guess.toLowerCase(), i + 1)) { System.out.println("TEST:" + i); results.add(i); } // Count value is for words that have 2 or more values of guess // in them. int count = 0; for (int i : results) { StringBuffer s1 = new StringBuffer(foodName); s1.insert(i + count, "&lt;b&gt;"); count = count + 3; s1.insert(i + count + gLength, "&lt;/b&gt;"); count = count + 4; foodName = s1.toString(); System.out.println("FOOD NAME:" + i + ":" + foodName); } return foodName; } }); // This is what actually does stuff when you click on a listview item. lv1.setOnItemClickListener(new OnItemClickListener() { public void onItemClick(AdapterView&lt;?&gt; parent, View view, int position, long id) { // Strip out the bold tags String clicked = (String) lv1.getItemAtPosition(position); clicked = clicked.replaceAll("&lt;b&gt;", ""); System.out.println("Clicked" + clicked); clicked = clicked.replaceAll("&lt;/b&gt;", ""); // Find the Food ID match and pass the food id to the // fooddisplay page for (Food f : foodList) { if (null != clicked &amp;&amp; clicked.equals(f.getFood_Name())) { Intent intent = new Intent(SearchByFood.this, SubstituteDisplay.class); intent.putExtra("FoodID", f.getFood_ID()); startActivity(intent); } } } }); } @Override public void onBackPressed() { final Intent intent = new Intent(this, MasterTemplateActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); this.startActivity(intent); return; } } </code></pre> <p><br> Again, any help as to why my fast scroll icon doesn't show up at first would be much appreciated. It is a small thing but it is really annoying me. </p>
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    1. COtry having the fastScrollEnabled=true in the xml. removed it from the code. may be that will work. i've similar problems with fastscroll..
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