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POUsing onClick() to Set Text Inside of getView() for BaseAdapter-extended Class
 

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  1. POUsing onClick() to Set Text Inside of getView() for BaseAdapter-extended Class
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    <p>I'm using one of the classes provided by <a href="https://github.com/openaphid" rel="nofollow noreferrer">openaphid</a> to do a flip view. The problem I'm running into (as I'm just beginning to find out) is that as new views get created and old ones are scrapped (inside <code>getView()</code>), the references to my variables are renewed and, thus, have different IDs, which results in me not being able to change them.</p> <p>Essentially, what I have are 2 <code>TextView</code>s. One of the <code>TextView</code>s (<code>txtvwCharacter</code>) has been set as clickable in the <code>XML</code> and what I'm trying to do is: when <code>txtvwCharacter</code> gets clicked/touched, the other <code>TextView</code> (<code>txtvwComposition</code>) gets toggled between <code>"some text"</code> and <code>""</code> (empty string).</p> <p>Below is a simplified version of my code, as I'm only focusing on the getView() method:</p> <pre><code>public class TravelAdapter extends BaseAdapter { private LayoutInflater inflater; ArrayList&lt;String&gt; characterArray = new ArrayList&lt;String&gt;(); ArrayList&lt;String&gt; compositionArray = new ArrayList&lt;String&gt;(); TextView txtvwCharacter, txtvwComposition; boolean detailsOn = false; public TravelAdapter(Context context) { inflater = LayoutInflater.from(context); } @Override public View getView(final int position, View convertView, ViewGroup parent) { View layout = convertView; if (convertView == null) layout = inflater.inflate(R.layout.complex1, null); txtvwCharacter = UI.&lt;TextView&gt;findViewById(layout, R.id.txtvw_character); txtvwComposition = UI.&lt;TextView&gt;findViewById(layout, R.id.txtvw_composition); txtvwCharacter.setText(characterArray.get(position)); txtvwComposition.setText(""); txtvwCharacter.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if(detailsOn == false) { txtvwComposition.setText(compositionArray.get(position)); detailsOn = true; } else { txtvwComposition.setText(""); detailsOn = false; } } }); return layout; } } </code></pre> <p>At the moment, with this code, the <code>onClick</code> does get registered and the <code>txtvwComposition</code> does get set, but it's not the same <code>txtvwComposition</code> that's being displayed, so, visually, it looks like nothing's happening.</p> <p>I'd like to have some sort of persistence here, where when I click on <code>txtvwCharacter</code>, it knows that it's that one <code>TextView</code> object, and not a new one that's been instantiated between all the flip back and forth. (Sorry, I don't know how to phrase that better.)</p> <p>I've looked at <a href="https://stackoverflow.com/questions/11953875/getview-the-constant-change-of-position-of-items-and-i-have-to-click-twice-o">this</a> and <a href="https://stackoverflow.com/questions/15354410/how-to-controll-textview-by-button-onclick-in-getview-method">this</a>, but I don't understand what <code>ViewHolder</code> does, how it knows what to "hold," or how to apply it to my specific code here.</p> <p><strong>CODE EDIT:</strong></p> <pre><code>public class TravelAdapter extends BaseAdapter { private LayoutInflater inflater; ArrayList&lt;String&gt; characterArray = new ArrayList&lt;String&gt;(); ArrayList&lt;String&gt; compositionArray = new ArrayList&lt;String&gt;(); TextView txtvwCharacter, txtvwComposition; boolean detailsOn = false; public TravelAdapter(Context context) { inflater = LayoutInflater.from(context); } @Override public View getView(final int position, View convertView, ViewGroup parent) { View layout = convertView; if (convertView == null) layout = inflater.inflate(R.layout.complex1, null); txtvwCharacter = UI.&lt;TextView&gt;findViewById(layout, R.id.txtvw_character); txtvwComposition = UI.&lt;TextView&gt;findViewById(layout, R.id.txtvw_composition); if (detailsOn == false) { txtvwCharacter.setText(characterArray.get(position)); txtvwComposition.setText(""); } else { txtvwCharacter.setText(characterArray.get(position)); txtvwComposition.setText(compositionArray.get(position)); } txtvwCharacter.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { RelativeLayout root = (RelativeLayout) v.getParent(); TextView txtvwComposition = (TextView) root.findViewById(R.id.txtvw_composition); if(detailsOn == false) { txtvwComposition.setText(compositionArray.get(position)); detailsOn = true; } else { txtvwComposition.setText(""); detailsOn = false; } } }); return layout; } } </code></pre>
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    1. COYou could simply navigate the view hierarchy in the `onClick` method using the `v` reference to get to that row's `txtvwComposition`.
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      1. USLuksprog
    2. COMaybe I'm misunderstanding you, but I don't have a problem getting the value for `txtvwComposition`, I have a problem setting its text value appropriately. Please elaborate if I'm mistaken.
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    3. COFor example, if your row layout is a LinearLayout containing the two `TextViews` you could simply do: `LinearLayout root = (LinearLayout) v.getParent(); TextView txtvwComposition = root.findViewById(R.id.txtvw_composition);` in the `onClick()` method. Right now those variables will not reference the proper views because they will always point to the TextViews from one of the last rows(the last calls to getView()).
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      1. POUsing onClick() to Set Text Inside of getView() for BaseAdapter-extended Class
      1. USLuksprog
 

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