Question

我正在尝试我的书中给出的列表视图示例之一，但即使我已逐行跟踪代码行方法listView.setOnItemClickListener（this），也无法正常工作。这是代码，

public class ViagemListActivity extends ListActivity implements OnItemClickListener {

    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);

        setListAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, listarViagens()));
                ListView listView = getListView();
                listView.setOnItemClickListener(this);
    }

    private List<String> listarViagens() {
        return Arrays.asList("São Paulo", "Rio de Janeiro", "Santa Catarina");

    }

    @Override
    public void onItemClick(AdapterViewCompat<?> parent, View view, int position,
            long id) {

            TextView textView = (TextView) view;
            String mensagem = "Viagem selecionada: " + textView.getText();
            Toast.makeText(getApplicationContext(), mensagem,
            Toast.LENGTH_SHORT).show();
            startActivity(new Intent(this, GastoListActivity.class));
    }
}

请帮忙，

Answer 1

问题是ListActivity基类不使用OnItemClickListener来指示按下的内容（因此implements OnItemClickListener和覆盖onItemClick无效）。相反，您需要覆盖onListItemClick()（请参阅此处的文档：http://developer.android.com/reference/android/app/ListActivity.html）

ListView基本示例不起作用

1 个答案: