在数组排序行上单击带有 OnItemClickListener 的任何项目时应用程序崩溃
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【中文标题】在数组排序行上单击带有 OnItemClickListener 的任何项目时应用程序崩溃【英文标题】：App crashes when clicking on any item with OnItemClickListener on array sort line 【发布时间】：2021-02-27 16:00:00 【问题描述】：应用程序运行良好，直到我单击任何列表项，它崩溃了。使用搜索时它运行良好，但是当我直接在列表项上单击它时，应用程序会停止。Logcat 和调试在第 153 行显示相同的问题。我在行153.第一个代码是 CribActivity 最后一个是视图活动，我不知道它可能与这个错误有关。
@SuppressLint("UseValueOf")
public class CribActivity extends Activity
private ListView lv1;
private EditText et;
private String lv_arr[]=
"item 1",
"item 2",
"item 67"
;
private ArrayList<String> array_sort= new ArrayList<String>();
int textlength=0;
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
lv1 = (ListView) findViewById(R.id.listView);
et = (EditText) findViewById(R.id.EditText01);
lv1 = (ListView)findViewById(R.id.listView);
lv1.setAdapter(
new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , lv_arr));
lv1.setTextFilterEnabled(true);
et.addTextChangedListener(new TextWatcher()
public void afterTextChanged(Editable s)
public void beforeTextChanged(CharSequence s,
int start, int count, int after)
public void onTextChanged(CharSequence s,
int start, int before, int count)
textlength = et.getText().length();
array_sort.clear();
for (int i = 0; i < lv_arr.length; i++)
if (textlength <= lv_arr[i].length())
if(et.getText().toString().equalsIgnoreCase(
(String)
lv_arr[i].subSequence(0,
textlength)))
array_sort.add(lv_arr[i]);
lv1.setAdapter(new ArrayAdapter<String>
(CribActivity.this,
android.R.layout.simple_list_item_1, array_sort));
);
lv1.setOnItemClickListener(new OnItemClickListener()
public void onItemClick(AdapterView<?> a, View v, int position,
long id)
String name = array_sort.get(position); //***THIS IS THE LINE 153***
for (int i = 0; i < lv_arr.length; i++)
if (name
.equalsIgnoreCase(
(String) lv_arr[i]))
position = i;
break;
String itemname = new Integer(position).toString();
Intent intent = new Intent();
intent.setClass(CribActivity.this, ViewActivity.class);
Bundle b = new Bundle();
b.putString("defStrID", itemname);
intent.putExtras(b);
nt
startActivity(intent);
);
调试：
E/AndroidRuntime: FATAL EXCEPTION: main
Process: ru.tablica.sputnikovyh, PID: 24169
java.lang.IndexOutOfBoundsException: Index: 1, Size: 0
at java.util.ArrayList.get(ArrayList.java:437)
at ru.tablica.sputnikovyh.CribActivity$2.onItemClick(CribActivity.java:153)
at android.widget.AdapterView.performItemClick(AdapterView.java:318)
at android.widget.AbsListView.performItemClick(AbsListView.java:1159)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3136)
at android.widget.AbsListView.onTouchUp(AbsListView.java:4064)
at android.widget.AbsListView.onTouchEvent(AbsListView.java:3822)
at android.view.View.dispatchTouchEvent(View.java:12513)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3024)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2705)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3030)
at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2719)
at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:440)
at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1830)
at android.app.Activity.dispatchTouchEvent(Activity.java:3400)
at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:398)
at android.view.View.dispatchPointerEvent(View.java:12752)
at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5106)
at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4909)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4426)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4479)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4445)
at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4585)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4453)
at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4642)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4426)
at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4479)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4445)
at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4453)
at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4426)
at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7092)
at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7061)
at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7022)
at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7195)
at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:186)
at android.os.MessageQueue.nativePollOnce(Native Method)
at android.os.MessageQueue.next(MessageQueue.java:326)
at android.os.Looper.loop(Looper.java:160)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
logcat：
E/eglCodecCommon: GoldfishAddressSpaceHostMemoryAllocator: ioctl_ping failed for device_type=5,
ret=-1
E/AndroidRuntime: FATAL EXCEPTION: main
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.get(ArrayList.java:437)
at ru.tablica.sputnikovyh.CribActivity$2.onItemClick(CribActivity.java:156)
at android.widget.AdapterView.performItemClick(AdapterView.java:318)
at android.widget.AbsListView.performItemClick(AbsListView.java:1159)
at android.widget.AbsListView$PerformClick.run(AbsListView.java:3136)
at android.widget.AbsListView$3.run(AbsListView.java:4052)
at android.os.Handler.handleCallback(Handler.java:873)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:193)
at android.app.ActivityThread.main(ActivityThread.java:6669)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:858)
查看活动
public class ViewActivity extends Activity
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.view);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
WindowManager.LayoutParams.FLAG_FULLSCREEN);
Bundle bundle = getIntent().getExtras();
String itemname = "n" + bundle.getString("defStrID");
Context context = getBaseContext();
String text = readRawTextFile(context, getResources().getIdentifier(itemname, "raw", "ru.tablica.sputnikovyh"));
WebView myWebView = (WebView) findViewById(R.id.webView);
String summary = "<!Doctype html><html><head><meta charset=utf-8></head><body>" + text + "</body></html>";
myWebView.loadData(summary, "text/html; charset=utf-8", "utf-8");
public static String readRawTextFile(Context ctx, int resId)
InputStream inputStream = ctx.getResources().openRawResource(resId);
InputStreamReader inputreader = new InputStreamReader(inputStream);
BufferedReader buffreader = new BufferedReader(inputreader);
String line;
StringBuilder text = new StringBuilder();
try
while (( line = buffreader.readLine()) != null)
text.append(line);
text.append('\n');
catch (IOException e)
return null;
return text.toString();
【问题讨论】：
这个错误告诉你在array_sort这个位置没有项目，尝试打印你的array_sort 字符串名称 = array_sort.get(position); System.out.println(array_sort);像这样？ 在字符串名称之前，使用 Log.d("my array: ", "+"+array_stort) 没有任何变化（与调试完全相同的 logcat 【参考方案1】：您正在访问onItemClick 内的array_sort，在您执行任何搜索之前，它在开始时为空。这就是为什么你有OutOfBoundException
当不处于“搜索模式”时，您的侦听器应访问lv_arr 数组或使用方便的方法adapter.getItem(position) - 您需要保持对适配器实例的引用或使用listView.getAdapter().getItem(position)。我看到您在搜索模式下正在更换适配器，因此您也可以更换 OnItemClickListener（但最好在开始时设置一个侦听器，其中一些逻辑处理这两种情况 - 常用列表并通过搜索过滤）
【讨论】：
我尝试在onItemClick之前添加这两行代码，但现在它根本不可点击，if (array_sort.size() 您的代码非常混乱，在一行中您正在检查array_sort，接下来您正在访问lv_arr - 这些不一样。清理您的代码，再次阅读我的答案，您将得到修复。添加一些 ifs 而不了解检查的内容和时间不是解决方案
这就是您的代码无法正常工作的原因 - array_sort 为空（执行任何排序时），您在 onItemClick (array_sort.get(position) 的第一行访问它。但下一行正在处理lv_arr - 你显然不知道你应该在哪个数组上工作并执行单击的项目接收
感谢您的帮助，但似乎我不像您那么好，所以如果您能提供更准确的建议，我将不胜感激。我应该在哪里添加什么样的代码？
将 String name = array_sort.get(position); 替换为 String name = lv_arr.get(position); 这将使您的代码在不执行搜索时工作，而不是在 EditText 中输入单个字符。我建议您从代码中完全删除array_sort（以及所有相关行）并重新编写过滤功能。有很多教程，而您当前的代码只是一团糟……您应该了解有关此功能（搜索/过滤）的更多信息以及数组如何工作的一些基础知识，我不会为您提供复制/粘贴的确切代码，因为您不会学到任何东西，这不是 SP 的目的以上是关于在数组排序行上单击带有 OnItemClickListener 的任何项目时应用程序崩溃的主要内容，如果未能解决你的问题，请参考以下文章