Using ListView : How to add a header view?

问题

I looke at the ListView API and I saw the method:

addHeaderView(View v)

What I want to do is to have a layout above the list, is this possible ?

I tried doing something like :

  EditText et=new EditText(this);
  et.setLayoutParams(new Gallery.LayoutParams(LayoutParams.FILL_PARENT,     LayoutParams.WRAP_CONTENT));
  et.setInputType(InputType.TYPE_CLASS_TEXT); 
  addHeaderView(et); //makes app crash

I also tried

setContentView(R.layout.tryview);

but it also make the app crash.

Help is very much appreciated!

Edit : The code for this class is:

public class GroupsActivity extends ListActivity {
@Override
public void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  String your_array_contents[] = {"a","ab","c"};
  setListAdapter(new ArrayAdapter<String>(this, R.layout.groups_layout, your_array_contents));
  EditText et=new EditText(this);
  et.setLayoutParams(new Gallery.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
  et.setInputType(InputType.TYPE_CLASS_TEXT); 

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

  lv.setAdapter(new ArrayAdapter<String>(GroupsActivity.this,
    android.R.layout.simple_list_item_multiple_choice, your_array_contents));
    lv.addHeaderView(et); //makes app crash
  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1:

You simply can't use View as a Header of ListView.

Because the view which is being passed in has to be inflated.

Look at my answer at Android ListView addHeaderView() nullPointerException for predefined Views for more info.

EDIT:

Look at this tutorial Android ListView and ListActivity - Tutorial .

EDIT 2: This link is broken Android ListActivity with a header or footer

回答2:

You can add as many headers as you like by calling addHeaderView() multiple times. You have to do it before setting the adapter to the list view.

And yes you can add header something like this way:

LayoutInflater inflater = getLayoutInflater();
ViewGroup header = (ViewGroup)inflater.inflate(R.layout.header, myListView, false);
myListView.addHeaderView(header, null, false);

回答3:

I found out that inflating the header view as:

inflater.inflate(R.layout.listheader, container, false);

being container the Fragment's ViewGroup, inflates the headerview with a LayoutParam that extends from FragmentLayout but ListView expect it to be a AbsListView.LayoutParams instead.

So, my problem was solved solved by inflating the header view passing the list as container:

ListView list = fragmentview.findViewById(R.id.listview);
View headerView = inflater.inflate(R.layout.listheader, list, false);

then

list.addHeaderView(headerView, null, false);

Kinda late answer but I hope this can help someone

来源：https://stackoverflow.com/questions/7978359/using-listview-how-to-add-a-header-view

标签

android

android-listview