Android联系人查询 - 光标索引超出范围
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【中文标题】Android联系人查询 - 光标索引超出范围【英文标题】:Android Contacts Query - cursor index out of bounds 【发布时间】:2014-02-13 07:57:26 【问题描述】:我正在尝试查询联系电话号码和姓名。在编写此方法时,我很确定它将为每个电话号码提供一个新的姓名/号码条目。在我按原样工作后,我会担心在单个联系人下列出号码...
我在第 160 行遇到光标索引越界错误,但不知道为什么(联系人仍然很新鲜)。我已经粘贴了弹出错误的方法以及logcat。
请帮我找出这个错误。另外,如果您知道一种更有效的查询方式,我将不胜感激。
提前致谢
编辑:
感谢 Graham Borland,我发现我的简单错误是“moveToNext()”的位置。将其移动到 for 循环的末尾修复了崩溃。我是对的,它为每个电话号码创建了一个新条目。但是我有这个联系人有 3 个号码,所以它给出了 3 个条目,现在我可以接受,但它在每个条目中给出了相同的号码。有什么想法吗?
private void getContacts()
String name, number, label;
uri = CommonDataKinds.Phone.CONTENT_URI;
projection = new String[] CommonDataKinds.Phone.DISPLAY_NAME,
CommonDataKinds.Phone.NUMBER, CommonDataKinds.Phone.LABEL ;
selection = null;
selectionArgs = null;
sortOrder = CommonDataKinds.Phone.DISPLAY_NAME;
Cursor peopleCursor = getContentResolver().query(uri, projection,
selection, selectionArgs, sortOrder);
if (peopleCursor != null)
int indexName = peopleCursor
.getColumnIndex(CommonDataKinds.Phone.DISPLAY_NAME);
int indexNumber = peopleCursor
.getColumnIndex(CommonDataKinds.Phone.NUMBER);
int indexLabel = peopleCursor
.getColumnIndex(CommonDataKinds.Phone.LABEL);
peopleCursor.moveToFirst();
for (int i = 0; i < peopleCursor.getCount(); i++)
ContactNameItems nameItems = new ContactNameItems();
ContactPhoneItems phoneItems = new ContactPhoneItems();
numberList = new ArrayList<ContactPhoneItems>();
peopleCursor.moveToNext();
name = peopleCursor.getString(indexName); // This is line 160
number = peopleCursor.getString(indexNumber);
label = peopleCursor.getString(indexLabel);
if (name != null && !name.isEmpty())
nameItems.setName(name);
mListDataHeader.add(nameItems);
if (number != null && !number.isEmpty())
phoneItems.setNumber(number);
phoneItems.setPhoneType(label);
numberList.add(phoneItems);
mListDataChild.put(mListDataHeader.get(i).getName(),
numberList);
mListAdapter.notifyDataSetChanged();
peopleCursor.close();
01-22 21:42:21.347: E/androidRuntime(793): FATAL EXCEPTION: main
01-22 21:42:21.347: E/AndroidRuntime(793): java.lang.RuntimeException: Unable to resume activity com.psesto.expandablelistview/com.psesto.expandablelistview.MainActivity: android.database.CursorIndexOutOfBoundsException: Index 5 requested, with a size of 5
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2742)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2771)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2235)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.ActivityThread.access$600(ActivityThread.java:141)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.os.Handler.dispatchMessage(Handler.java:99)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.os.Looper.loop(Looper.java:137)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.ActivityThread.main(ActivityThread.java:5041)
01-22 21:42:21.347: E/AndroidRuntime(793): at java.lang.reflect.Method.invokeNative(Native Method)
01-22 21:42:21.347: E/AndroidRuntime(793): at java.lang.reflect.Method.invoke(Method.java:511)
01-22 21:42:21.347: E/AndroidRuntime(793): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
01-22 21:42:21.347: E/AndroidRuntime(793): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
01-22 21:42:21.347: E/AndroidRuntime(793): at dalvik.system.NativeStart.main(Native Method)
01-22 21:42:21.347: E/AndroidRuntime(793): Caused by: android.database.CursorIndexOutOfBoundsException: Index 5 requested, with a size of 5
01-22 21:42:21.347: E/AndroidRuntime(793): at android.database.AbstractCursor.checkPosition(AbstractCursor.java:424)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.database.AbstractWindowedCursor.checkPosition(AbstractWindowedCursor.java:136)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.database.AbstractWindowedCursor.getString(AbstractWindowedCursor.java:50)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.database.CursorWrapper.getString(CursorWrapper.java:114)
01-22 21:42:21.347: E/AndroidRuntime(793): at com.psesto.expandablelistview.MainActivity.getContacts(MainActivity.java:160)
01-22 21:42:21.347: E/AndroidRuntime(793): at com.psesto.expandablelistview.MainActivity.onResume(MainActivity.java:58)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1185)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.Activity.performResume(Activity.java:5182)
01-22 21:42:21.347: E/AndroidRuntime(793): at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2732)
01-22 21:42:21.347: E/AndroidRuntime(793): ... 12 more
修复:
private void getContacts()
String name, number, label;
uri = CommonDataKinds.Phone.CONTENT_URI;
projection = new String[] CommonDataKinds.Phone.DISPLAY_NAME,
CommonDataKinds.Phone.NUMBER, CommonDataKinds.Phone.LABEL ;
selection = null;
selectionArgs = null;
sortOrder = CommonDataKinds.Phone.DISPLAY_NAME;
Cursor peopleCursor = getContentResolver().query(uri, projection,
selection, selectionArgs, sortOrder);
if (peopleCursor != null)
int indexName = peopleCursor
.getColumnIndex(CommonDataKinds.Phone.DISPLAY_NAME);
int indexNumber = peopleCursor
.getColumnIndex(CommonDataKinds.Phone.NUMBER);
int indexLabel = peopleCursor
.getColumnIndex(CommonDataKinds.Phone.LABEL);
peopleCursor.moveToFirst();
for (int i = 0; i < peopleCursor.getCount(); i++)
ContactNameItems nameItems = new ContactNameItems();
ContactPhoneItems phoneItems = new ContactPhoneItems();
numberList = new ArrayList<ContactPhoneItems>();
name = peopleCursor.getString(indexName); // This is line 160
number = peopleCursor.getString(indexNumber);
label = peopleCursor.getString(indexLabel);
if (name != null && !name.isEmpty())
nameItems.setName(name);
mListDataHeader.add(nameItems);
if (number != null && !number.isEmpty())
phoneItems.setNumber(number);
phoneItems.setPhoneType(label);
numberList.add(phoneItems);
mListDataChild.put(mListDataHeader.get(i).getName(),
numberList);
mListAdapter.notifyDataSetChanged();
peopleCursor.moveToNext();
peopleCursor.close();
【问题讨论】:
【参考方案1】:试试这个干净的迭代:
for (cursor.moveToFirst(); !cursor.isAfterLast(); cursor.moveToNext())
// do what you need with the cursor here
这是一个典型的错误。 Cursor.moveToFirst()
已经将光标移动到第一个位置,然后Cursor.moveToNext()
将其移动到下一个跳过第一个位置。
要使您的代码正常工作,请从您的代码中删除 Cursor.moveToFirst()
。
附带说明,如果您正在寻找更简洁的方式来处理游标和内容提供者,请尝试使用这个库:https://github.com/futuresimple/android-db-commons
它会将代码的重要部分更改为以下内容:
numberList = ProviderAction.query(CommonDataKinds.Phone.CONTENT_URI)
.projection(CommonDataKinds.Phone.DISPLAY_NAME,
CommonDataKinds.Phone.NUMBER,
CommonDataKinds.Phone.LABEL)
.perform(getContentResolver())
.toFluentIterable(new Function<Cursor, ContactPhoneItems>()
@Override
public ContactPhoneItems apply(Cursor cursor)
ContactPhoneItems item = new ContactPhoneItems();
item.setNumber(cursor.getString(cursor.getColumnIndexOrThrow(CommonDataKinds.Phone.NUMBER)));
item.setPhoneType(cursor.getString(cursor.getColumnIndexOrThrow(CommonDataKinds.Phone.LABEL)));
return item;
)
.filter(new Predicate<ContactPhoneItems>()
@Override
public boolean apply(ContactPhoneItems contactPhoneItems)
return !TextUtils.isEmpty(contactPhoneItems.getNumber());
);
【讨论】:
【参考方案2】: peopleCursor.moveToFirst();
for (int i = 0; i < peopleCursor.getCount(); i++)
// do some setup
peopleCursor.moveToNext();
// read data from the cursor
这是一种非常复杂且错误的遍历游标的方式。当您第一次读取数据时,您已经移动到第二行(moveToFirst()
后跟moveToNext()
)。在循环的第 5 次迭代中,您已经超过了结果的末尾,这导致了错误。
改用简单的while
循环。
while (peopleCursor.moveToNext())
....
更多解释请见What's the best way to iterate an Android Cursor?。
【讨论】:
我需要添加一个数组列表的值,这就是我使用 for 的原因(如果你知道如何使用 'while' 来做同样的事情,我会全力以赴)。但我明白你在说“moveToNext”的位置。我要把它移到循环的末尾,看看会发生什么 好的...将它移到最后修复了崩溃(耶!)。我是对的,它为每个电话号码创建了一个新条目。但是我有这个联系人有 3 个号码,所以它给出了 3 个条目,现在我可以接受,但它在每个条目中给出了相同的号码。有什么想法吗? @WizardKnight 这是一个完全不同的故事。有一个很好的培训涵盖了 Android 联系人访问:developer.android.com/training/contacts-provider/index.html以上是关于Android联系人查询 - 光标索引超出范围的主要内容,如果未能解决你的问题,请参考以下文章