java - setOnClickListener android 工作室

Question

我正在 android studio 中通过在线 Material 学习 Java

但是我被这个简单的程序困住了

Android Studio 说这段代码有错误，但我看不到它们，这是代码:

package com.acmegames.listadecontatos;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.*;
import android.view.*;
import android.app.*;


public class ListaContatosActivity extends AppCompatActivity {

    ListView lista_contatos;

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

        lista_contatos = (ListView) findViewById(R.id.lista_contatos);

        lista_contatos.setOnClickListener( new AdapterView.OnItemClickListener(){

            @Override

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

                String nome = ((TextView) view).getText().toString();

                AlertDialog.Builder dialogo =  new AlertDialog.Builder(ListaContatosActivity.this);
                dialogo.setTitle("Contato");
                dialogo.setMessage("Contato selecionado: " + nome);
                dialogo.setNeutralButton("Ok", null);
                dialogo.show();

            }

        });
    }
}

Answer 1

将 ListView 的 setOnClickListener 更改为 setOnItemClickListener