Android : BaseAdapter how to?

Question

Ok, I have been searching thick and thin, and I am having some issues implementing a BaseAdapter.

I have been able to implement a Simple Cursor Adapter http://code.google.com/android/samples/ApiDemos/src/com/example/android/apis/view/List7.html as per the example above.

There is a pretty good BaseAdapter example here : List14 google example

I am wanting to create my own List Adapter using BaseAdapter to show a listView, with multiple items from a Database. I know this can be done using the Simple Cursor Adapter, but I am looking to handle rows differently, so I want to be able to draw each row by overriding getView. The data would be pulled from a cursor.

I know this code is ugly for getting to the cursor data, but assuming I have populated a cursor. What suggestions do you have on this if column 8 contains the image resource id. :

@Override
 public View getView(int position, View convertView, ViewGroup parent) {
  // TODO Auto-generated method stub
  cursor.moveToPosition(position);
  ImageView i = new ImageView(mContext);
  i.setImageResource(cursor.getShort(8));
  i.setAdjustViewBounds(true);
  i.setLayoutParams(new AbsListView.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

  return i;
 }

Do you have any good examples of a BaseAdapter being drawn using a cursor?

Answer 1

Can someone offer me some insight to redraw the list view? On a delete, I want it to rebuild.

Chris.

              public void onCreate(Bundle bundle)
               {
              super.onCreate(bundle);
              //setContentView(R.layout.findlist);
              //getListView().setEmptyView(findViewById(R.id.empty));
              mDbHelper = new DBHelper(this);
                 mDbHelper.open();
              cursor = mDbHelper.fetchAllLocations();
                 startManagingCursor(cursor);
              mAdapter = new myListAdapter(this);
              setListAdapter(mAdapter);
               }



            public class myListAdapter extends BaseAdapter {
                        public myListAdapter(Context c) { ...
                        public int getCount() { ...
                        public Object getItem(int position) { ...
                        public long getItemId(int position) { ...
            @Override
                 public View getView(int position, View convertView, ViewGroup parent) {

                  cursor.moveToPosition(position);
                   RowView rv;
                   if (convertView == null) {
                                rv = new RowView(mContext,(cursor.getString(2)),
                                  (cursor.getString(5)), position);
                            } else {
                                rv = (RowView) convertView;
                                rv.setTitle(cursor.getString(2));
                                rv.setDialogue(cursor.getString(5));
                                rv.setFocusable(true);
                                rv.setClickable(true);
                            }
                             return rv;
                           }

            }

        @Override
            protected void onListItemClick(ListView l, View v, int position, long id) {
             // TODO Auto-generated method stub
             super.onListItemClick(l, v, position, id);
             // Do what you will need to w/ a List Row Click
                        Intent h = new Intent(FindList.this,showmaplocation.class);
                        startActivityForResult(h,SAVE_TABS);   
            }


    private class RowView extends LinearLayout {
            public RowView(Context context, String title, String words, int position) {
                super(context);

                this.setOrientation(VERTICAL);

                // Here we build the child views in code. They could also have
                // been specified in an XML file.

                mTitle = new TextView(context);
                mTitle.setText(title);
                addView(mTitle, new LinearLayout.LayoutParams(
                        LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

                mDialogue = new TextView(context);
                mDialogue.setText(words);
                addView(mDialogue, new LinearLayout.LayoutParams(
                        LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));

                Button mButton = new Button(context);
                mButton.setFocusable(false);
                mButton.setId(position);
                addView(mButton, new LinearLayout.LayoutParams(
                        LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT));

                currentPosition = position;
                Button button = (Button)findViewById(position);
                button.setOnClickListener(mDeleteListener);

            }



         private OnClickListener mDeleteListener = new OnClickListener()
            {
                public void onClick(View v)
                {
                    // To send a result, simply call setResult() before your
                    // activity is finished, building an Intent with the data
                    // you wish to send.
                    Intent data = new Intent();
                    data.setAction("Corky!");
                    setResult(RESULT_OK, data);
                  //  finish();
                    cursor.moveToPosition(v.getId());
                    mDbHelper.deleteLocation(cursor.getInt(0));
                   // mAdapter.remove()
                    mAdapter.notifyDataSetChanged();
                    setListAdapter(mAdapter);
                    Toast mToast;
                    mToast = Toast.makeText(FindList.this, "Deleted" ,
                            Toast.LENGTH_LONG);
                    mToast.show();
                }
            };
            /**
             * Convenience method to set the title of a SpeechView
             */
            public void setTitle(String title) {
                mTitle.setText(title);
            }

            /**
             * Convenience method to set the dialogue of a SpeechView
             */
            public void setDialogue(String words) {
                mDialogue.setText(words);
            }

            private TextView mTitle;
            private TextView mDialogue;
        }

}