IllegalArgumentException：索引 1 处的绑定值为 null

Question

有人知道这意味着什么吗？

12-31 20:55:45.861: ERROR/AndroidRuntime(12478): Caused by: java.lang.IllegalArgumentException: the bind value at index 1 is null
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.database.sqlite.SQLiteProgram.bindString(SQLiteProgram.java:234)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.database.sqlite.SQLiteQuery.bindString(SQLiteQuery.java:182)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:48)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1345)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:330)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.database.sqlite.SQLiteQueryBuilder.query(SQLiteQueryBuilder.java:280)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at net.lp.collectionista.providers.ProductContentProvider.query(ProductContentProvider.java:350)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.content.ContentProvider$Transport.query(ContentProvider.java:163)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.content.ContentResolver.query(ContentResolver.java:245)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at net.lp.collectionista.providers.FacadeContentProvider.query(FacadeContentProvider.java:563)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.content.ContentProvider$Transport.query(ContentProvider.java:163)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.content.ContentResolver.query(ContentResolver.java:245)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at net.lp.collectionista.util.ScanAddTask.existsProduct(ScanAddTask.java:164)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at net.lp.collectionista.util.ScanAddTask.<init>(ScanAddTask.java:71)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at net.lp.collectionista.util.ItemScanAddTask.<init>(ItemScanAddTask.java:34)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at net.lp.collectionista.ui.activities.collections.cd.CDCollectionViewWindow$MusicCDItemScanAddTask.<init>(CDCollectionViewWindow.java:147)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at net.lp.collectionista.ui.activities.collections.cd.CDCollectionViewWindow.restoreLocalState(CDCollectionViewWindow.java:1044)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at net.lp.collectionista.ui.activities.collections.cd.CDCollectionViewWindow.onRestoreInstanceState(CDCollectionViewWindow.java:966)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.app.Activity.performRestoreInstanceState(Activity.java:815)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.app.Instrumentation.callActivityOnRestoreInstanceState(Instrumentation.java:1096)
12-31 20:55:45.861: ERROR/AndroidRuntime(12478):     at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2641)

Answer 1

绑定值显然是指插入到query()中的选择的selectionArgs。如果这样的 selectionArgs 值为 null，您会得到这个。

Answer 2

@Gray 和 @pjv 响应是了解导致此错误的问题的关键。你必须小心选择和selectionArgs匹配，如果你传递selection = null和selectionArgs = some，你也会得到这个错误！ :) 谢谢！

Answer 3

这与问题并不完全相关，但我面临着一个类似的问题，参数开头包含破折号(-)。这是导致问题的原因。

所以我这样逃避了争论，

return mDatabase.query(table_name,
                       null,
                       column_name + "=?",
                       new String[]{"\\" + argument},
                       null,
                       null,
                       null);

这为我解决了这个问题。

您还可以看到这个： 如何转义特殊字符，例如' 在 android 的 sqlite 中