如何删除和刷新列表视图？

Question

我已经创建了一个方法deleteItem，它必须删除该行，但是在我单击按钮后它会继续存在，如果我再试一次，我会得到一个例外。

public class WITHistory extends WITBase implements OnItemClickListener{
private ListView listView;
public int del;
@Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.history_wit);

    listView = (ListView) findViewById(R.id.listSearch);
    HistoryAdapter adapter = new HistoryAdapter(this, searches);
    listView.setAdapter(adapter);
    listView.setOnItemClickListener(this);
}

@Override
public void onItemClick(AdapterView<?> parent, View view, int pos,long id) {
    Toast.makeText(this, "You selected Row ["+pos+"]\n"+
"For donation data ["+searches.get(pos)+"]\n"+"With ID of ["+id+"]", Toast.LENGTH_LONG).show();
    del = pos;

}

public void deleteItem(View v) {
    searches.remove(del);

}

}

Answer 1

将您的适配器声明为类成员

并添加

public void deleteItem(View v) {
    searches.remove(del);
adapter.notifyDataSetChanged ().;

}