为listview设置长按侦听器

Question

我有以下代码:

public class MainActivity extends ListActivity { 
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}   
protected void onListItemClick(ListView l, View v, final int position, long id) {
    super.onListItemClick(l, v, position, id);
}}

我需要将其更改为onListItemLongClick()但是如何？可能吗？

Answer 1

你的问题与这个问题非常相似,但看起来并不完全相同.

你注意到的是ListActivity类没有专门针对这种情况的方法覆盖.

为了将此功能添加为方法覆盖,您的类应该实现AdapterView.OnItemLongClickListener接口,然后您可以添加onItemLongClick()方法覆盖,其onListItemClick()方式与您已经拥有的方法覆盖一样,但响应长按.

只需确保按照此答案的说明操作,您必须android:longClickable="true"在布局xml中使用,或者调用listview.setLongClickable(true);

例:

public class MainActivity extends ListActivity implements AdapterView.OnItemLongClickListener {

    ListView listview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        ListView listview = (ListView) findViewById(R.id.list);

        listview.setLongClickable(true);

    }

    @Override
    public boolean onItemLongClick(AdapterView<?> l, View v,
                                   final int position, long id) {

        Toast.makeText(this, "long clicked pos: " + position, Toast.LENGTH_LONG).show();

        return true;
    }

    protected void onListItemClick(ListView l, View v, final int position, long id) {
        super.onListItemClick(l, v, position, id);

        Toast.makeText(this, "short clicked pos: " + position, Toast.LENGTH_LONG).show();  

    }

 //....................