android - 获取运行时崩溃日志说明您的内容必须有一个 ListView ，其 id 属性为 'android.R.id.list' ，不确定为什么？

Question

我收到运行时异常 java.lang.RuntimeException:您的内容必须有一个 ListView，其 id 属性为“android.R.id.list”。不确定这里出了什么问题。我查看了其他一些答案，似乎将 ListView id 更改为 list 是问题所在，但这似乎不起作用。

activity_search.xml

        <ListView
            android:id="@+id/list"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_weight="1" >
        </ListView>

    </LinearLayout>

list_item.xml

<?xml version="1.0" encoding="utf-8"?>
<!--  Single List Item Design -->
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/name"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:padding="10dip"
        android:textSize="16dip"
        android:textStyle="bold" >
</TextView>

搜索 Activity .java

package com.chance.squat;

import com.chance.squat.R;
import java.util.ArrayList;
import java.util.HashMap;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.app.ListActivity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;

public class SearchActivity extends ListActivity {

    // url to make request
    private static String url = "http://192.168.1.115:3000/bathrooms/nearby.json/?lat=45.580639&lon=-122.677682";

    // JSON Node names
    private static final String TAG_BATHROOMS = "bathrooms";
    private static final String TAG_ID = "ID";
    private static final String TAG_NAME = "name";
    private static final String TAG_DISTANCE = "distance";

    // contacts JSONArray
    JSONArray bathrooms = null;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);     
        setContentView(R.layout.activity_search);

        // Hashmap for ListView
        ArrayList<HashMap<String, String>> bathroomList = new ArrayList<HashMap<String, String>>();

        // Creating JSON Parser instance
        JSONParser jParser = new JSONParser();

        // getting JSON string from URL
        JSONObject json = jParser.getJSONFromUrl(url);

        try {
            // Getting Array of Contacts
            bathrooms = json.getJSONArray(TAG_BATHROOMS);

            // looping through All Contacts
            for(int i = 0; i < bathrooms.length(); i++){
                JSONObject c = bathrooms.getJSONObject(i);

                // Storing each json item in variable
                String id = c.getString(TAG_ID);
                String name = c.getString(TAG_NAME);
                String distance = c.getString(TAG_DISTANCE);
                String distanceTrimmed = distance.substring(0,4) + " " + "miles away";

                System.out.println(name);

                // creating new HashMap
                HashMap<String, String> map = new HashMap<String, String>();

                // adding each child node to HashMap key => value
                map.put(TAG_ID, id);
                map.put(TAG_NAME, name);
                map.put(TAG_DISTANCE, distanceTrimmed);

                // adding HashList to ArrayList
                bathroomList.add(map);
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }


        /**
         * Updating parsed JSON data into ListView
         * */

        ListAdapter adapter = new SimpleAdapter(this, bathroomList,
                R.layout.list_item,
                new String[] { TAG_NAME}, new int[] {
                         R.id.name });

        setListAdapter(adapter);

        // selecting single ListView item
        ListView lv = getListView();

        // Launching new screen on Selecting Single ListItem
        lv.setOnItemClickListener(new OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // getting values from selected ListItem
                //String name = ((TextView) view.findViewById(R.id.name)).getText().toString();
                //String distance = ((TextView) view.findViewById(R.id.distance)).getText().toString();


                // Starting new intent
                //Intent in = new Intent(getApplicationContext(), SeachActivity.class);
                //in.putExtra(TAG_NAME, name);
                //in.putExtra(TAG_DISTANCE, distance);
                //startActivity(in);

            }
        });


    }

}

Answer 1

将 ListView id 更改为 android:id="@android:id/list" 因为当您扩展 ListActivity 时，您必须具有 ListView id android.R.id。列表

<ListView
    android:id="@android:id/list"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1" >
</ListView>