这段代码：

public void foo() {

new Thread() {

@Override

public void run() {

ShaufelDatabaseHelper dbHelper = ShaufelDatabaseHelper.getInstance(parentActivity);

sqliteDatabase connection = null;

Cursor queryData = null;

final String[] values = new String[8];

try{

connection = dbHelper.getReadableDatabase();

queryData = connection.rawQuery( // line 132

"SELECT name,firstname,section,row,gravenr,type,workorder,comment "+

"FROM orders,graves "+

"WHERE orders.id=? AND graves.id=orders.id",new String[] {orderID});

queryData.moveToFirst(); // line 138

// ...

} catch(Throwable t) {

// ...

}

}.start();

}

给我这些例外：

10-29 15:19:55.103: E/AndroidRuntime(23102): FATAL EXCEPTION: Thread-1387

10-29 15:19:55.103: E/AndroidRuntime(23102): java.lang.IllegalMonitorStateException

10-29 15:19:55.103: E/AndroidRuntime(23102): at java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:126)

10-29 15:19:55.103: E/AndroidRuntime(23102): at java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1239)

10-29 15:19:55.103: E/AndroidRuntime(23102): at java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:431)

10-29 15:19:55.103: E/AndroidRuntime(23102): at android.database.sqlite.sqliteDatabase.unlock(sqliteDatabase.java:487)

10-29 15:19:55.103: E/AndroidRuntime(23102): at android.database.sqlite.sqliteDirectCursorDriver.query(sqliteDirectCursorDriver.java:62)

10-29 15:19:55.103: E/AndroidRuntime(23102): at android.database.sqlite.sqliteDatabase.rawQueryWithFactory(sqliteDatabase.java:1564)

10-29 15:19:55.103: E/AndroidRuntime(23102): at android.database.sqlite.sqliteDatabase.rawQuery(sqliteDatabase.java:1538)

10-29 15:19:55.103: E/AndroidRuntime(23102): at de.l_one.app.shaufel.OrderDetailView$3.run(OrderDetailView.java:132)

10-29 15:21:07.953: E/sqliteQuery(23133): exception: library routine called out of sequence; query: SELECT name,comment FROM orders,graves WHERE orders.id=? AND graves.id=orders.id

10-29 15:21:07.953: E/sql order detail(23133): android.database.sqlite.sqliteMisuseException: library routine called out of sequence

10-29 15:21:07.953: E/sql order detail(23133): android.database.sqlite.sqliteMisuseException: library routine called out of sequence

10-29 15:21:07.953: E/sql order detail(23133): at android.database.sqlite.sqliteQuery.nativeFillWindow(Native Method)

10-29 15:21:07.953: E/sql order detail(23133): at android.database.sqlite.sqliteQuery.fillWindow(sqliteQuery.java:86)

10-29 15:21:07.953: E/sql order detail(23133): at android.database.sqlite.sqliteCursor.fillWindow(sqliteCursor.java:164)

10-29 15:21:07.953: E/sql order detail(23133): at android.database.sqlite.sqliteCursor.getCount(sqliteCursor.java:156)

10-29 15:21:07.953: E/sql order detail(23133): at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:161)

10-29 15:21:07.953: E/sql order detail(23133): at android.database.AbstractCursor.moveToFirst(AbstractCursor.java:201)

10-29 15:21:07.953: E/sql order detail(23133): at de.l_one.app.shaufel.OrderDetailView$3.run(OrderDetailView.java:138)

10-29 15:22:52.983: E/AndroidRuntime(23133): FATAL EXCEPTION: Thread-1411

10-29 15:22:52.983: E/AndroidRuntime(23133): java.lang.IllegalStateException: database /data/data/de.l_one.app.shaufel/databases/poidatabase (conn# 0) already closed

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteDatabase.verifyDbIsOpen(sqliteDatabase.java:2082)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteCompiledsql.(sqliteCompiledsql.java:58)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteProgram.compilesql(sqliteProgram.java:143)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteProgram.compileAndbindAllArgs(sqliteProgram.java:361)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteProgram.(sqliteProgram.java:127)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteProgram.(sqliteProgram.java:94)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteQuery.(sqliteQuery.java:53)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteDirectCursorDriver.query(sqliteDirectCursorDriver.java:47)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteDatabase.rawQueryWithFactory(sqliteDatabase.java:1564)

10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteDatabase.rawQuery(sqliteDatabase.java:1538)

10-29 15:22:52.983: E/AndroidRuntime(23133): at de.l_one.app.shaufel.OrderDetailView$3.run(OrderDetailView.java:132)

这些不会在一次运行中抛出,而是(似乎是)随机抛出.抛出Exception时没有模式,有时根本不会抛出Exception.

我在我的应用程序中使用相同的方法,它没有任何问题.我没有最小的线索来自IllegalStateException,因为数据库没有关闭,至少不是我. (根据SO的一些答案,这是正常的,在某些情况下甚至比手动关闭你的dbs更好).

代码注释：

ShaufelDatabaseHelper是一个扩展sqliteOpenHelper的Singleton.它用于一般工作的不同活动,这似乎是唯一的例外.

我刚刚在第二台设备上测试过,没有抛出任何异常,一切正常.

抛出Exceptions的设备是运行android 4.0.3的lenovo thinkpad.

没有Exceptions运行的是运行Android 2.3.4的HTC Sensation Z710e.

有谁知道这会导致什么？

E：我不知道它是否有帮助但是在sqliteMisuseException之前记录了这个：

10-29 16:07:46.530: I/sqliteDatabaseCpp(23728): sqlite returned: error code = 21,msg = API called with NULL prepared statement,db=/data/data/de.l_one.app.shaufel/databases/poidatabase

10-29 16:07:46.530: I/sqliteDatabaseCpp(23728): sqlite returned: error code = 21,msg = misuse at line 58929 of [8609a15dfa],msg = API call with invalid database connection pointer,msg = misuse at line 106340 of [8609a15dfa],msg = misuse at line 106271 of [8609a15dfa],db=/data/data/de.l_one.app.shaufel/databases/poidatabase

这段代码： public void foo() { new Thread() { @Override public void run() { ShaufelDatabaseHelper dbHelper = ShaufelDatabaseHelper.getInstance(parentActivity); sqliteDatabase connection = null; Cursor queryData = null; final String[] values = new String[8]; try{ connection = dbHelper.getReadableDatabase(); queryData = connection.rawQuery( // line 132 "SELECT name,firstname,section,row,gravenr,type,workorder,comment "+ "FROM orders,graves "+ "WHERE orders.id=? AND graves.id=orders.id",new String[] {orderID}); queryData.moveToFirst(); // line 138 // ... } catch(Throwable t) { // ... } }.start(); } 给我这些例外： 10-29 15:19:55.103: E/AndroidRuntime(23102): FATAL EXCEPTION: Thread-1387 10-29 15:19:55.103: E/AndroidRuntime(23102): java.lang.IllegalMonitorStateException 10-29 15:19:55.103: E/AndroidRuntime(23102): at java.util.concurrent.locks.ReentrantLock$Sync.tryRelease(ReentrantLock.java:126) 10-29 15:19:55.103: E/AndroidRuntime(23102): at java.util.concurrent.locks.AbstractQueuedSynchronizer.release(AbstractQueuedSynchronizer.java:1239) 10-29 15:19:55.103: E/AndroidRuntime(23102): at java.util.concurrent.locks.ReentrantLock.unlock(ReentrantLock.java:431) 10-29 15:19:55.103: E/AndroidRuntime(23102): at android.database.sqlite.sqliteDatabase.unlock(sqliteDatabase.java:487) 10-29 15:19:55.103: E/AndroidRuntime(23102): at android.database.sqlite.sqliteDirectCursorDriver.query(sqliteDirectCursorDriver.java:62) 10-29 15:19:55.103: E/AndroidRuntime(23102): at android.database.sqlite.sqliteDatabase.rawQueryWithFactory(sqliteDatabase.java:1564) 10-29 15:19:55.103: E/AndroidRuntime(23102): at android.database.sqlite.sqliteDatabase.rawQuery(sqliteDatabase.java:1538) 10-29 15:19:55.103: E/AndroidRuntime(23102): at de.l_one.app.shaufel.OrderDetailView$3.run(OrderDetailView.java:132) 10-29 15:21:07.953: E/sqliteQuery(23133): exception: library routine called out of sequence; query: SELECT name,comment FROM orders,graves WHERE orders.id=? AND graves.id=orders.id 10-29 15:21:07.953: E/sql order detail(23133): android.database.sqlite.sqliteMisuseException: library routine called out of sequence 10-29 15:21:07.953: E/sql order detail(23133): android.database.sqlite.sqliteMisuseException: library routine called out of sequence 10-29 15:21:07.953: E/sql order detail(23133): at android.database.sqlite.sqliteQuery.nativeFillWindow(Native Method) 10-29 15:21:07.953: E/sql order detail(23133): at android.database.sqlite.sqliteQuery.fillWindow(sqliteQuery.java:86) 10-29 15:21:07.953: E/sql order detail(23133): at android.database.sqlite.sqliteCursor.fillWindow(sqliteCursor.java:164) 10-29 15:21:07.953: E/sql order detail(23133): at android.database.sqlite.sqliteCursor.getCount(sqliteCursor.java:156) 10-29 15:21:07.953: E/sql order detail(23133): at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:161) 10-29 15:21:07.953: E/sql order detail(23133): at android.database.AbstractCursor.moveToFirst(AbstractCursor.java:201) 10-29 15:21:07.953: E/sql order detail(23133): at de.l_one.app.shaufel.OrderDetailView$3.run(OrderDetailView.java:138) 10-29 15:22:52.983: E/AndroidRuntime(23133): FATAL EXCEPTION: Thread-1411 10-29 15:22:52.983: E/AndroidRuntime(23133): java.lang.IllegalStateException: database /data/data/de.l_one.app.shaufel/databases/poidatabase (conn# 0) already closed 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteDatabase.verifyDbIsOpen(sqliteDatabase.java:2082) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteCompiledsql.(sqliteCompiledsql.java:58) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteProgram.compilesql(sqliteProgram.java:143) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteProgram.compileAndbindAllArgs(sqliteProgram.java:361) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteProgram.(sqliteProgram.java:127) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteProgram.(sqliteProgram.java:94) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteQuery.(sqliteQuery.java:53) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteDirectCursorDriver.query(sqliteDirectCursorDriver.java:47) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteDatabase.rawQueryWithFactory(sqliteDatabase.java:1564) 10-29 15:22:52.983: E/AndroidRuntime(23133): at android.database.sqlite.sqliteDatabase.rawQuery(sqliteDatabase.java:1538) 10-29 15:22:52.983: E/AndroidRuntime(23133): at de.l_one.app.shaufel.OrderDetailView$3.run(OrderDetailView.java:132) 这些不会在一次运行中抛出,而是(似乎是)随机抛出.抛出Exception时没有模式,有时根本不会抛出Exception. 我在我的应用程序中使用相同的方法,它没有任何问题.我没有最小的线索来自IllegalStateException,因为数据库没有关闭,至少不是我. (根据SO的一些答案,这是正常的,在某些情况下甚至比手动关闭你的dbs更好). 代码注释： ShaufelDatabaseHelper是一个扩展sqliteOpenHelper的Singleton.它用于一般工作的不同活动,这似乎是唯一的例外. 我刚刚在第二台设备上测试过,没有抛出任何异常,一切正常. 抛出Exceptions的设备是运行android 4.0.3的lenovo thinkpad. 没有Exceptions运行的是运行Android 2.3.4的HTC Sensation Z710e. 有谁知道这会导致什么？ E：我不知道它是否有帮助但是在sqliteMisuseException之前记录了这个： 10-29 16:07:46.530: I/sqliteDatabaseCpp(23728): sqlite returned: error code = 21,msg = API called with NULL prepared statement,db=/data/data/de.l_one.app.shaufel/databases/poidatabase 10-29 16:07:46.530: I/sqliteDatabaseCpp(23728): sqlite returned: error code = 21,msg = misuse at line 58929 of [8609a15dfa],msg = API call with invalid database connection pointer,msg = misuse at line 106340 of [8609a15dfa],msg = misuse at line 106271 of [8609a15dfa],db=/data/data/de.l_one.app.shaufel/databases/poidatabase