Question

我刚刚开始使用Eclipse进行Android开发，所以我一直在浏览Android开发者网站上的所有“Hello”教程。但是，我已经在List View教程中解开了。我已多次尝试纠正这些问题，但我没有经验，无论我做什么似乎都没有用。我已经直接从网站复制并粘贴了代码，但它仍然包含我无法解决的错误，所以有人可以帮助我吗？这是代码：

package com.hellolistview;

import android.app.Activity;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class HelloListView extends ListActivity {
/** Called when the activity is first created. */


@Override
 public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);

   setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, COUNTRIES));

   ListView lv = getListView();
   lv.setTextFilterEnabled(true);

   lv.setOnItemClickListener(new OnItemClickListener() {
     public void onItemClick(AdapterView<?> parent, View view,
         int position, long id) {
       // When clicked, show a toast with the TextView text
       Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
           Toast.LENGTH_SHORT).show();
     }
   });
 }
    }
    static final String[] COUNTRIES = new String[] {
    "Afghanistan", "Albania", "Algeria", "American Samoa", "Andorra",
    "Angola", "Anguilla", "Antarctica", "Antigua and Barbuda", "Argentina",
    "Armenia", "Aruba", "Australia", "Austria", "Azerbaijan",
    "Bahrain", "Bangladesh", "Barbados", "Belarus", "Belgium",
    "Belize", "Benin", "Bermuda", "Bhutan", "Bolivia",
    "Bosnia and Herzegovina", "Botswana", "Bouvet Island", "Brazil", "British Indian Ocean Territory",
    "British Virgin Islands", "Brunei", "Bulgaria", "Burkina Faso", "Burundi",
    "Cote d'Ivoire", "Cambodia", "Cameroon", "Canada", "Cape Verde",
    "Cayman Islands", "Central African Republic", "Chad", "Chile", "China",
    "Christmas Island", "Cocos (Keeling) Islands", "Colombia", "Comoros", "Congo",
    "Cook Islands", "Costa Rica", "Croatia", "Cuba", "Cyprus", "Czech Republic",
    "Democratic Republic of the Congo", "Denmark", "Djibouti", "Dominica", "Dominican Republic",
    "East Timor", "Ecuador", "Egypt", "El Salvador", "Equatorial Guinea", "Eritrea",
    "Estonia", "Ethiopia", "Faeroe Islands", "Falkland Islands", "Fiji", "Finland",
    "Former Yugoslav Republic of Macedonia", "France", "French Guiana", "French Polynesia",
    "French Southern Territories", "Gabon", "Georgia", "Germany", "Ghana", "Gibraltar",
    "Greece", "Greenland", "Grenada", "Guadeloupe", "Guam", "Guatemala", "Guinea", "Guinea-Bissau",
    "Guyana", "Haiti", "Heard Island and McDonald Islands", "Honduras", "Hong Kong", "Hungary",
    "Iceland", "India", "Indonesia", "Iran", "Iraq", "Ireland", "Israel", "Italy", "Jamaica",
    "Japan", "Jordan", "Kazakhstan", "Kenya", "Kiribati", "Kuwait", "Kyrgyzstan", "Laos",
    "Latvia", "Lebanon", "Lesotho", "Liberia", "Libya", "Liechtenstein", "Lithuania", "Luxembourg",
    "Macau", "Madagascar", "Malawi", "Malaysia", "Maldives", "Mali", "Malta", "Marshall Islands",
    "Martinique", "Mauritania", "Mauritius", "Mayotte", "Mexico", "Micronesia", "Moldova",
    "Monaco", "Mongolia", "Montserrat", "Morocco", "Mozambique", "Myanmar", "Namibia",
    "Nauru", "Nepal", "Netherlands", "Netherlands Antilles", "New Caledonia", "New Zealand",
    "Nicaragua", "Niger", "Nigeria", "Niue", "Norfolk Island", "North Korea", "Northern Marianas",
    "Norway", "Oman", "Pakistan", "Palau", "Panama", "Papua New Guinea", "Paraguay", "Peru",
    "Philippines", "Pitcairn Islands", "Poland", "Portugal", "Puerto Rico", "Qatar",
    "Reunion", "Romania", "Russia", "Rwanda", "Sqo Tome and Principe", "Saint Helena",
    "Saint Kitts and Nevis", "Saint Lucia", "Saint Pierre and Miquelon",
    "Saint Vincent and the Grenadines", "Samoa", "San Marino", "Saudi Arabia", "Senegal",
    "Seychelles", "Sierra Leone", "Singapore", "Slovakia", "Slovenia", "Solomon Islands",
    "Somalia", "South Africa", "South Georgia and the South Sandwich Islands", "South Korea",
    "Spain", "Sri Lanka", "Sudan", "Suriname", "Svalbard and Jan Mayen", "Swaziland", "Sweden",
    "Switzerland", "Syria", "Taiwan", "Tajikistan", "Tanzania", "Thailand", "The Bahamas",
    "The Gambia", "Togo", "Tokelau", "Tonga", "Trinidad and Tobago", "Tunisia", "Turkey",
    "Turkmenistan", "Turks and Caicos Islands", "Tuvalu", "Virgin Islands", "Uganda",
    "Ukraine", "United Arab Emirates", "United Kingdom",
    "United States", "United States Minor Outlying Islands", "Uruguay", "Uzbekistan",
    "Vanuatu", "Vatican City", "Venezuela", "Vietnam", "Wallis and Futuna", "Western Sahara",
    "Yemen", "Yugoslavia", "Zambia", "Zimbabwe"
     };

XML文件都是直接从this address的教程中复制的，所以它们应该是正确的。错误包括：“AdapterView类型中的方法setOnItemClickListener（AdapterView.OnItemClickListener）不适用于参数（new OnItemClickListener（）{}）”。任何帮助都将不胜感激。感谢。

Answer 1

尝试添加：

import android.widget.AdapterView.OnItemClickListener;

我认为你看到的错误基本相同。这是我的代码的“导入”部分。

import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

Answer 2

这方面的简单解决方案是在宣布国家之后关闭该课程......
然后代码如下

 package com.hellolistview;

import android.app.Activity;
import android.app.ListActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
public class HelloListView extends ListActivity {
/** Called when the activity is first created. */


@Override
 public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);

   setListAdapter(new ArrayAdapter<String>(this, R.layout.list_item, COUNTRIES));

   ListView lv = getListView();
   lv.setTextFilterEnabled(true);

   lv.setOnItemClickListener(new OnItemClickListener() {
     public void onItemClick(AdapterView<?> parent, View view,
         int position, long id) {
       // When clicked, show a toast with the TextView text
       Toast.makeText(getApplicationContext(), ((TextView) view).getText(),
           Toast.LENGTH_SHORT).show();
     }
   });
 }

    static final String[] COUNTRIES = new String[] {
    "Afghanistan", "Albania", "Algeria", "American Samoa", "Andorra",
    "Angola", "Anguilla", "Antarctica", "Antigua and Barbuda", "Argentina",
    "Armenia", "Aruba", "Australia", "Austria", "Azerbaijan",
    "Bahrain", "Bangladesh", "Barbados", "Belarus", "Belgium",
    "Belize", "Benin", "Bermuda", "Bhutan", "Bolivia",
    "Bosnia and Herzegovina", "Botswana", "Bouvet Island", "Brazil", "British Indian Ocean Territory",
    "British Virgin Islands", "Brunei", "Bulgaria", "Burkina Faso", "Burundi",
    "Cote d'Ivoire", "Cambodia", "Cameroon", "Canada", "Cape Verde",
    "Cayman Islands", "Central African Republic", "Chad", "Chile", "China",
    "Christmas Island", "Cocos (Keeling) Islands", "Colombia", "Comoros", "Congo",
    "Cook Islands", "Costa Rica", "Croatia", "Cuba", "Cyprus", "Czech Republic",
    "Democratic Republic of the Congo", "Denmark", "Djibouti", "Dominica", "Dominican Republic",
    "East Timor", "Ecuador", "Egypt", "El Salvador", "Equatorial Guinea", "Eritrea",
    "Estonia", "Ethiopia", "Faeroe Islands", "Falkland Islands", "Fiji", "Finland",
    "Former Yugoslav Republic of Macedonia", "France", "French Guiana", "French Polynesia",
    "French Southern Territories", "Gabon", "Georgia", "Germany", "Ghana", "Gibraltar",
    "Greece", "Greenland", "Grenada", "Guadeloupe", "Guam", "Guatemala", "Guinea", "Guinea-Bissau",
    "Guyana", "Haiti", "Heard Island and McDonald Islands", "Honduras", "Hong Kong", "Hungary",
    "Iceland", "India", "Indonesia", "Iran", "Iraq", "Ireland", "Israel", "Italy", "Jamaica",
    "Japan", "Jordan", "Kazakhstan", "Kenya", "Kiribati", "Kuwait", "Kyrgyzstan", "Laos",
    "Latvia", "Lebanon", "Lesotho", "Liberia", "Libya", "Liechtenstein", "Lithuania", "Luxembourg",
    "Macau", "Madagascar", "Malawi", "Malaysia", "Maldives", "Mali", "Malta", "Marshall Islands",
    "Martinique", "Mauritania", "Mauritius", "Mayotte", "Mexico", "Micronesia", "Moldova",
    "Monaco", "Mongolia", "Montserrat", "Morocco", "Mozambique", "Myanmar", "Namibia",
    "Nauru", "Nepal", "Netherlands", "Netherlands Antilles", "New Caledonia", "New Zealand",
    "Nicaragua", "Niger", "Nigeria", "Niue", "Norfolk Island", "North Korea", "Northern Marianas",
    "Norway", "Oman", "Pakistan", "Palau", "Panama", "Papua New Guinea", "Paraguay", "Peru",
    "Philippines", "Pitcairn Islands", "Poland", "Portugal", "Puerto Rico", "Qatar",
    "Reunion", "Romania", "Russia", "Rwanda", "Sqo Tome and Principe", "Saint Helena",
    "Saint Kitts and Nevis", "Saint Lucia", "Saint Pierre and Miquelon",
    "Saint Vincent and the Grenadines", "Samoa", "San Marino", "Saudi Arabia", "Senegal",
    "Seychelles", "Sierra Leone", "Singapore", "Slovakia", "Slovenia", "Solomon Islands",
    "Somalia", "South Africa", "South Georgia and the South Sandwich Islands", "South Korea",
    "Spain", "Sri Lanka", "Sudan", "Suriname", "Svalbard and Jan Mayen", "Swaziland", "Sweden",
    "Switzerland", "Syria", "Taiwan", "Tajikistan", "Tanzania", "Thailand", "The Bahamas",
    "The Gambia", "Togo", "Tokelau", "Tonga", "Trinidad and Tobago", "Tunisia", "Turkey",
    "Turkmenistan", "Turks and Caicos Islands", "Tuvalu", "Virgin Islands", "Uganda",
    "Ukraine", "United Arab Emirates", "United Kingdom",
    "United States", "United States Minor Outlying Islands", "Uruguay", "Uzbekistan",
    "Vanuatu", "Vatican City", "Venezuela", "Vietnam", "Wallis and Futuna", "Western Sahara",
    "Yemen", "Yugoslavia", "Zambia", "Zimbabwe"
     };
}

Hello，Views：List View教程问题

2 个答案: