How to fire onListItemClick in Listactivity with b

问题:

I have a simple ListActivity that uses a custom ListAdapter to generate the views in the list. Normally the ListAdapter would just fill the views with TextViews, but now I want to put a button there as well.

It is my understanding and experience however that putting a focusable view in the list item prevents the firing of onListItemClick() in the ListActivity when the list item is clicked. The button still functions normally within the list item, but when something besides the button is pressed, I want onListItemClick to be triggered.

How can I make this work?

回答1:

as I wrote in previous comment solution is to setFocusable(false) on ImageButton.

There is even more elegant solution try to add android:descendantFocusability=\"blocksDescendants\" in root layout of list element. That will make clicks onListItem possible and separately u can handle Button or ImageButton clicks

Hope it helps ;)

Cheers

回答2:

I hope I can help here. I assume that you have custom layout for listView items, and this layout consists of button and some other views - like TextView, ImageView or whatever. Now you want to have different event fired on button click and different event fired on everything else clicked.

You can achieve that without using onListItemClick() of your ListActivity.
Here is what you have to do:

You are using custom layout, so probably you are overriding getView() method from your custom adapter. The trick is to set the different listeners for your button and different for the whole view (your row). Take a look at the example:

private class MyAdapter extends ArrayAdapter<String> implements OnClickListener {

    public MyAdapter(Context context, int resource, int textViewResourceId,
            List<String> objects) {
        super(context, resource, textViewResourceId, objects);
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        String text = getItem(position);
        if (null == convertView) {
            convertView = mInflater.inflate(R.layout.custom_row, null);
        }
        //take the Button and set listener. It will be invoked when you click the button.
        Button btn = (Button) convertView.findViewById(R.id.button);
        btn.setOnClickListener(this);
        //set the text... not important     
        TextView tv = (TextView) convertView.findViewById(R.id.text);
        tv.setText(text);
        //!!! and this is the most important part: you are settin listener for the whole row
        convertView.setOnClickListener(new OnItemClickListener(position));
        return convertView;
    }

    @Override
    public void onClick(View v) {
        Log.v(TAG, \"Row button clicked\");
    }
}

Your OnItemClickListener class could be declared like here:

private class OnItemClickListener implements OnClickListener{       
    private int mPosition;
    OnItemClickListener(int position){
        mPosition = position;
    }
    @Override
    public void onClick(View arg0) {
        Log.v(TAG, \"onItemClick at position\" + mPosition);          
    }       
}

Of course you will probably add some more parameters to OnItemClickListener constructor.
And one important thing - implementation of getView shown above is pretty ugly, normally you should use ViewHolder pattern to avoid findViewById calls.. but you probably already know that.
My custom_row.xml file is RelativeLayout with Button of id \"button\", TextView of id \"text\" and ImageView of id \"image\" - just to make things clear.
Regards!

回答3:

When a custom ListView contains focusable elements, onListItemClick won\'t work (I think it\'s the expected behavior). Just remove the focus from the custom view, it will do the trick:

For example:

public class ExtendedCheckBoxListView extends LinearLayout {

    private TextView mText;
    private CheckBox mCheckBox;

    public ExtendedCheckBoxListView(Context context, ExtendedCheckBox aCheckBoxifiedText) {
         super(context);
         …
         mText.setFocusable(false);
         mText.setFocusableInTouchMode(false);

         mCheckBox.setFocusable(false);
         mCheckBox.setFocusableInTouchMode(false);
        …       
    }
}

回答4:

I have the same problem: OnListItemClick not fired ! [SOLVED]
That\'s happen on class that extend ListActivity,
with a layout for ListActivity that content TextBox and ListView nested into LinearLayout
and another layout for the rows (a CheckBox and TextBox nested into LineraLayout).

That\'s code:

res/layout/configpage.xml (main for ListActivity)

<LinearLayout
    xmlns:android=\"http://schemas.android.com/apk/res/android\"  
    android:orientation=\"vertical\"  
    android:layout_width=\"fill_parent\"  
    android:layout_height=\"fill_parent\" > 
    <TextView  
        android:id=\"@+id/selection\"  
        android:layout_width=\"fill_parent\"  
        android:layout_height=\"wrap_content\"  
        android:text=\"pippo\" /> 
    <ListView  
        android:id=\"@android:id/list\"  
        android:layout_width=\"fill_parent\"  
        android:layout_height=\"wrap_content\"  
        android:drawSelectorOnTop=\"false\"  
        android:background=\"#aaFFaa\" > 
    </ListView> 
<LinearLayout> 

res/layout/row.xml (layout for single row)  
<LinearLayout  
  xmlns:android=\"http://schemas.android.com/apk/res/android\"  
  android:layout_width=\"fill_parent\"  
  android:layout_height=\"wrap_content\"> 
  <CheckBox  
      android:id=\"@+id/img\"  
      android:layout_width=\"wrap_content\"  
      android:layout_height=\"wrap_content\"  
      **android:focusable=\"false\"**  
      **android:focusableInTouchMode=\"false\"** /> 

  <TextView  
      android:id=\"@+id/testo\"  
      android:layout_width=\"wrap_content\"  
      android:layout_height=\"wrap_content\"  
      **android:focusable=\"false\"**  
      **android:focusableInTouchMode=\"false\"** /> 
</LinearLayout> 

src/.../.../ConfigPage.java

public class ConfigPage extends ListActivity
{
    TextView selection;

    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.configpage);  
        // loaded from res/value/strings  
        String[] azioni = getResources().getStringArray(R.array.ACTIONS);  
        setListAdapter(new ArrayAdapter<String>(this, R.layout.row, 
                R.id.testo,   azioni));  
        selection = (TextView) findViewById(R.id.selection);  
    }       

    public void onListItemClick(ListView parent, View view, int position, long id)
    {
        selection.setText(\" \" + position);
    }
}

This begin to work when I added on row.xml

• android:focusable=\"false\"
• android:focusableInTouchMode=\"false\"

I use Eclipse 3.5.2
Android SDK 10.0.1
min SDK version: 3

I hope this is helpful
... and sorry for my english :(

回答5:

just add android:focusable=\"false\" as one of the attributes of your button

回答6:

I\'ve had the same problem with ToggleButton. After half a day of banging my head against a wall I finally solved it. It\'s as simple as making the focusable view un-focusable, using \'android:focusable\'. You should also avoid playing with the focusability and clickability (I just made up words) of the list row, just leave them with the default value.

Of course, now that your focusable views in the list row are un-focusable, users using the keyboard might have problems, well, focusing them. It\'s not likely to be a problem, but just in case you want to write 100% flawless apps, you could use the onItemSelected event to make the elements of the selected row focusable and the elements of the previously selected row un-focusable.

回答7:

 ListView lv = getListView();
lv.setTextFilterEnabled(true);

lv.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
    int position, long id) {
  // When clicked, show a toast with the TextView text
  Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
      Toast.LENGTH_SHORT).show();
}
});

回答8:

I used the getListAdapter().getItem(position) instantiating an Object that holds my values within the item

MyPojo myPojo = getListAdapter().getItem(position);

then used the getter method from the myPojo it will call its proper values within the item .