I want to be able to click on a button inside an item of a ListView. It should have a different effect from clicking the whole item. I realize there are several questions asked on stackoverflow, but none of the suggestions works for me.
The ListView is inside a Fragment.
Layout of the fragment:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".EventFragment" >
<ListView
android:id="@+id/event_list"
android:background="#C0FFFFFF"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginTop="5dp" />
</RelativeLayout>
Layout of each list item:
<?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="wrap_content"
android:orientation="vertical"
android:background="#C0101010">
<TextView
android:id="@+id/event_list_separator"
style="?android:attr/listSeparatorTextViewStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="separator"
android:textColor="@android:color/white" />
<LinearLayout
android:id="@+id/event_list_element"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFFFF"
android:padding="6dip" >
<ImageView
android:id="@+id/event_list_element_icon"
android:layout_width="26dip"
android:layout_height="60dip"
android:layout_marginRight="6dip"
android:contentDescription="TODO" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/event_list_element_firstLine"
android:layout_width="match_parent"
android:layout_height="25dip"
android:text="item_header"
android:textSize="18sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="35dip"
android:orientation="horizontal" >
<TextView
android:id="@+id/event_list_element_secondLine"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical"
android:ellipsize="marquee"
android:singleLine="true"
android:text="Description"
android:textSize="14sp" />
<Button
android:id="@+id/event_list_element_button_1"
android:layout_width="132dip"
android:layout_height="match_parent"
android:drawableLeft="@drawable/ic_button1"
android:text="Participate"
android:textStyle="bold"
android:textSize="14sp"
/>
<Button
android:id="@+id/event_list_element_button_2"
android:layout_width="110dip"
android:layout_height="match_parent"
android:ellipsize="marquee"
android:drawableLeft="@drawable/ic_button2"
android:singleLine="true"
android:text="No thanks"
android:textStyle="bold"
android:gravity="center_vertical"
android:textSize="14sp"
/>
<TextView
android:id="@+id/event_list_element_additional_text"
android:layout_width="100dip"
android:layout_height="match_parent"
android:ellipsize="marquee"
android:singleLine="true"
android:gravity="center_vertical"
android:text="sample"
android:textStyle="bold"
android:textSize="14sp" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
My list adapter is:
public class EventAdapter extends ArrayAdapter<Event> {
static class ViewHolder {
TextView separator;
LinearLayout relativeLayout;
TextView eventHeader;
TextView eventDescription;
ImageView blueDot;
Button button1;
Button button2;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater)
_context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.event_list_item, parent, false);
viewHolder = new ViewHolder();
viewHolder.relativeLayout = (LinearLayout) convertView.findViewById(R.id.event_list_element);
viewHolder.blueDot = (ImageView) convertView.findViewById(R.id.event_list_element_icon);
viewHolder.eventHeader = (TextView) convertView.findViewById(R.id.event_list_element_firstLine);
viewHolder.eventDescription = (TextView) convertView.findViewById(R.id.event_list_element_secondLine);
viewHolder.button1 = (Button) convertView.findViewById(R.id.event_list_element_button1);
viewHolder.button2 = (Button) convertView.findViewById(R.id.event_list_element_button2);
viewHolder.separator = (TextView) convertView.findViewById(R.id.event_list_separator);
convertView.setTag(viewHolder);
} else{
viewHolder = (ViewHolder) convertView.getTag();
}
final Event item = getItem(position);
if (item != null) {
OnClickListener listener = new OnClickListener() {
@Override
public void onClick(View arg0) {
Toast.makeText(_context, "boo!", Toast.LENGTH_SHORT).show();
}
};
viewHolder.button1.setOnClickListener(listener);
}
return convertView;
}
}
The problem is that the two buttons are not clickable. What I tried to far:
ListView listView = (ListView) rootView.findViewById(R.id.event_list);
listView.setItemsCanFocus(true);
I also tried setting on the button:
android:focusable="true"
android:clickable="true"
I also experimented with android:descendantFocusability.
None of my tries made the buttons clickable.
Insert the attribute android:descendantFocusability="blocksDescendants" in the Parent Layout declaration of each list item.
The xml should be as follows:
<?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="wrap_content"
android:orientation="vertical"
android:descendantFocusability="blocksDescendants"
android:background="#C0101010">
<TextView
android:id="@+id/event_list_separator"
style="?android:attr/listSeparatorTextViewStyle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="separator"
android:textColor="@android:color/white" />
<LinearLayout
android:id="@+id/event_list_element"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#FFFFFFFF"
android:padding="6dip" >
<ImageView
android:id="@+id/event_list_element_icon"
android:layout_width="26dip"
android:layout_height="60dip"
android:layout_marginRight="6dip"
android:contentDescription="TODO" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/event_list_element_firstLine"
android:layout_width="match_parent"
android:layout_height="25dip"
android:text="item_header"
android:textSize="18sp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="35dip"
android:orientation="horizontal" >
<TextView
android:id="@+id/event_list_element_secondLine"
android:layout_width="0dip"
android:layout_height="match_parent"
android:layout_weight="1"
android:gravity="center_vertical"
android:ellipsize="marquee"
android:singleLine="true"
android:text="Description"
android:textSize="14sp" />
<Button
android:id="@+id/event_list_element_button_1"
android:layout_width="132dip"
android:layout_height="match_parent"
android:drawableLeft="@drawable/ic_button1"
android:text="Participate"
android:textStyle="bold"
android:textSize="14sp"
/>
<Button
android:id="@+id/event_list_element_button_2"
android:layout_width="110dip"
android:layout_height="match_parent"
android:ellipsize="marquee"
android:drawableLeft="@drawable/ic_button2"
android:singleLine="true"
android:text="No thanks"
android:textStyle="bold"
android:gravity="center_vertical"
android:textSize="14sp"
/>
<TextView
android:id="@+id/event_list_element_additional_text"
android:layout_width="100dip"
android:layout_height="match_parent"
android:ellipsize="marquee"
android:singleLine="true"
android:gravity="center_vertical"
android:text="sample"
android:textStyle="bold"
android:textSize="14sp" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</LinearLayout>
I found the solution! I wanted to update the list of events periodically (right now it's a thread running every x milliseconds, later I want to switch that to only update the event list when there is a change). Anyway, the code was (inside my main activity):
private BroadcastReceiver _bReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if(intent.getAction().equals(RECEIVE_EVENT)) {
Bundle bundle = intent.getExtras();
Event event = (Event) bundle.get("event");
showEvent(event);
}
}
};
private void showEvent(final Event event){
final Context context = this;
runOnUiThread(new Runnable() {
public void run() {
final ListView listview = (ListView) findViewById(R.id.event_list);
EventAdapter adapter = new EventAdapter(context, id.event_list, getEventList());
listview.setAdapter(adapter);
}
});
}
Setting the adapter each time is certainly not the right approach. Once I changed that to only set the adapter once, it worked like suggested using android:descendantFocusability="blocksDescendants"
来源：https://stackoverflow.com/questions/20709755/button-inside-listview-not-clickable