我在这里有一个基于我在 API 演示中看到的基础适配器。我想从列表中动态添加/删除项目，在这种情况下，从按钮调用的意图添加，并从单击列表视图中的图像视图中删除。在这种情况下，我将在 DATA[] 中添加/删除项目。我在 SO 和谷歌上四处寻找各种 AddItem() 和或 Remove() 方法，但对于这种情况并没有真正想出太多。任何帮助都会很棒。这是代码：
public class myActivity extends Activity{
private static final int CONTACT_PICKER_RESULT = 1001;
private static final String TAG = myActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ListView lv = (ListView)findViewById(R.id.listView1);
lv.setAdapter(new myAdapter(this));
Button bAdd = (Button)findViewById(R.id.bAdd);
bAdd.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
........xxxx....xxxx....
}
public class myAdapter extends BaseAdapter{
private LayoutInflater mInflater;
public myAdapter(Context context) {
mInflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return DATA.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.row,null);
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.txtTitle);
holder.icon = (ImageView) convertView.findViewById(R.id.imgIcon);
convertView.setTag(holder);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
holder.text.setText(DATA[position]);
holder.icon.setImageResource(android.R.drawable.ic_delete);
return convertView;
}
}
static class ViewHolder {
TextView text;
ImageView icon;
}
//this will not be hard-coded, jsut included for clarity
private static final String[] DATA ={
"one","two","three" };