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POAndroid Listview shuffle image load from the net and local
 

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  1. POAndroid Listview shuffle image load from the net and local
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    <p>I've a problem with a listview and shuffle image.</p> <p>Premise: I know that the cells/rows are re-used (recycled)</p> <p>My cell is made up of an image and some textview (to simplify we suppose, only one image and only one tetxview)</p> <p>if the image is present on the net (I know that by a bussines logic...) it's downloaded from the net (correct image); otherwise I put an image from application's bundle (default image)</p> <p>in this way, i've a shuffle images problem.</p> <p>Instead, if I load the defualt image always from the net, it's work fine.</p> <p>My question is: why? why if i load default-image from the net it's ok, but if i load default-image from the app's bundle I've shuffle images problem?</p> <p>Thanks in advance.</p> <p>Code of MyAdaper</p> <pre><code>public class MyArrayAdapter extends ArrayAdapter&lt;MyObject&gt; { final String URL_DEFAULT_IMG_USER="https://xxxxxxxxxxx/xxxx/default.png"; private LayoutInflater inflater; private List&lt;MyObject&gt; data; LinearLayout l1=null; Context context=null; public MyArrayAdapter(Context context,List&lt;MyObject&gt; objects) { super(context, R.layout.item_myobject, objects); inflater= LayoutInflater.from(context); this.data=objects; this.context=context; BitmapManagerNoCompressionUser.INSTANCE.setPlaceholder(BitmapFactory.decodeResource( context.getResources(), R.drawable.user)); } //ViewHolder class that hold over ListView Item static class ViewHolder{ //ImageView image; ImageView image; TextView displayName; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; if(convertView == null){ convertView = inflater.inflate(R.layout.item_myobject, null); holder =new ViewHolder(); holder.image=(ImageView) convertView.findViewById(R.id.imageView); holder.displayName =(TextView) convertView.findViewById(R.id.textViewDisplayName); convertView.setTag(R.id.imageViewMyObject, holder.image); convertView.setTag(R.id.textViewDisplayName, holder.displayName); //set tag of convertView to the holder convertView.setTag(holder); } else { holder =(ViewHolder) convertView.getTag(); /* THIS CODE IS IRRELEVANT FOR THE SUFFLE PROBLEM, BUT I DONT'KNOW IF IT IS NECESSARY holder.image=(ImageView) convertView.getTag(R.id.imageViewMyObject); holder.displayName =(TextView) convertView.getTag(R.id.textViewDisplayName); */ } holder.image.setTag(position); // This line is important. if(data.get(position).getPathFotoServer()!=null ) { BitmapManagerNoCompressionUser.INSTANCE.loadBitmap(data.get(position).getPathFotoServer(), holder.image, 100,100); } else { BitmapManagerNoCompressionUser.INSTANCE.loadBitmap(URL_DEFAULT_IMG_USER, holder.image, 100,100); //IT'S OK //holder.image.setImageResource(R.drawable.default); //WITH THIS LINE, SHUFFLE IMAGE PROBLEM } holder.displayName.setText((CharSequence) data.get(position).getDisplayName()); return convertView; } } </code></pre> <p>Code of item_myobject</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout1" android:layout_width="match_parent" android:layout_height="60dp" android:orientation="horizontal" android:layout_gravity="fill_vertical" android:background="@drawable/state_item_listview" &gt; &lt;!-- android:layout_margin="5dp" --&gt; &lt;ImageView android:id="@+id/imageView" android:layout_width="60dp" android:layout_height="60dp" android:layout_margin="5dp" android:src="@drawable/user" /&gt; &lt;TextView android:id="@+id/textViewDisplayName" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Medium Text" android:gravity="left" android:textStyle="bold" android:textAppearance="?android:attr/textAppearanceMedium" /&gt; &lt;/LinearLayout&gt; </code></pre> <p>Update: add the code for sort items in the activity:</p> <pre><code>Collections.sort(data, new Comparator&lt;MyObject&gt;(){ public int compare(MyObject s1, MyObject s2) { Log.d(TAG, "s1.getDisplayName().compareToIgnoreCase(s2.getDisplayName():"+s1.getDisplayName()+" "+s2.getDisplayName()); return s1.getDisplayName().compareToIgnoreCase(s2.getDisplayName()); } }) </code></pre>
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    1. COWhat is **"shuffle image's problem"**?
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      1. USAmulya Khare
    2. COI guess the problem is the List object in java is not ordinated, so for example you expect the image at position 4 to be "myimage.png" but it isn't because the list is not ordinated.
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      1. USTheRedFox
    3. COThansk, I'm sorry: pratically, when you scroll the list, sometimes (random), the default image (loaded from inside the app) is replaced by an image downloaded previously from the net, but belongs another row-cell, but if I load default image always from the net, it's work fine. I hope that's more clear....sorry for my english
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      1. USuser2968278
 

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