I have a ListView with a custom adapter. I want to set ImageButton visibility on each line based on the condition in my list. However, the strings are not what I assume.
In the example below, I have a class called ColorInfowith a property count. Whenever the counter is greater than 0, I want to show an image. For dummy data, I filled the array with 20 elements ColorInfowith each even element having a counter greater than 0. However, when I run the application, I do not see ImageButtonin the alternative lines
The following is a complete example:
Demoactivity
public class DemoActivity extends Activity {
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ColorInfo[] clr= new ColorInfo[20];
for(int i=0;i<20;i++){
ColorInfo clrInfo = new ColorInfo();
if (i%2 == 0) {
clrInfo.count = 5;
}
clr[i] = clrInfo;
}
((ListView)findViewById(R.id.list)).setAdapter(new MyAdapter(this, 0, clr));
}
private class MyAdapter extends ArrayAdapter<ColorInfo> {
ViewHolder holder;
LayoutInflater inflater;
public MyAdapter(Context context, int textViewResourceId,ColorInfo[] objects) {
super(context, textViewResourceId, objects);
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View itemView = convertView;
final ColorInfo item = getItem(position);
if(itemView == null){
itemView = inflater.inflate(R.layout.row, null);
holder = new ViewHolder();
holder.editButton = (ImageButton) itemView.findViewById(R.id.some_button);
itemView.setTag(holder);
}
else
holder = (ViewHolder)itemView.getTag();
if (item.count>0)
holder.editButton.setVisibility(View.VISIBLE);
return itemView;
}
private class ViewHolder{
ImageButton editButton;
}
}
private static class ColorInfo{
int count = 0;
}
}
main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="test"/>
<ImageButton
android:id="@+id/some_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#000000"
android:visibility="gone"
android:src="@drawable/ic_some_img"/>
</LinearLayout>
Update
, ArrayAdapter, , else.