Android ListView trouble with OnItemClick Listener

Question

我的应用程序是一个公司列表，每个公司是我的列表视图中的一行，显示:图片，名称和电话(按适配器)。一切正常!但是当我点击列表视图中的一个项目时，它应该启动another activity，显示带有公司详细信息的页面。我有问题与onitemclick listener(它不工作):

empresa = firm (in portuguese) lv = my listview
  lv.setOnItemClickListener(new OnItemClickListener() {
    public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
      Intent i = new Intent (getApplicationContext(), detalheEmpresas.class );
      Empresas empresa = (Empresas) parent.getItemAtPosition(position);
      i.putExtra("Nome", empresa.getTitle().toString());
      startActivity(i); }});

my detalheEmpresas activity

public class detalheEmpresas extends Activity {
@Override
public void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
this.setContentView(R.layout.detalhes_empresa);
Intent i = getIntent();
String nome = i.getStringExtra("Nome");
TextView NOME = (TextView) findViewById(R.id.Nome);
NOME.setText(nome);
}}

Answer 1

我有一个非常相似的问题。通过设置单击侦听器来查看列表适配器中的自身来解决。

public class EmpresasListAdapter extends ArrayAdapter<Empresas> {
    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        //recycling view and setting view fields.
        /* Set listener to open firm detail activity on click */
        view.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                // Your code to open firm detail activity
                Intent i = new Intent (getApplicationContext(), detalheEmpresas.class );
                Empresas empresa = (Empresas) parent.getItemAtPosition(position);
                i.putExtra("Nome", empresa.getTitle().toString());
                startActivity(i);
            }
        });
        return view;
    } 
}

Answer 2

很可能与getApplicationContext…尝试使用活动上下文:

lv.setOnItemClickListener(new OnItemClickListener() {
  public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
  Intent i = new Intent (mSavedContext.getActivity(), detalheEmpresas.class ); <-------------
  Empresas empresa = (Empresas) parent.getItemAtPosition(position);
  i.putExtra("Nome", empresa.getTitle().toString());
  startActivity(i); 
}});

----------新编辑-----------------

好，不如直接给父activity添加一个click handler，这样就可以了:

public class ParentActivity extends Activity implements OnItemClickListener {
   your activity code...
   public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
         public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
         Intent i = new Intent (getActivity(), detalheEmpresas.class ); 
         Empresas empresa = (Empresas) parent.getItemAtPosition(position);
         i.putExtra("Nome", empresa.getTitle().toString());
         startActivity(i);
   } 

活动代码中的

替换为

 lv.setOnItemClickListener(new OnItemClickListener() {

 lv.setOnItemClickListener(this);