这是什么问题导致的？
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): FATAL EXCEPTION: AsyncTask #5
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): java.lang.RuntimeException: An error occured while executing doInBackground()
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at android.os.AsyncTask$3.done(AsyncTask.java:200)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1068)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:561)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at java.lang.Thread.run(Thread.java:1096)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): Caused by: android.database.sqlite.SQLiteException: unable to open database file: BEGIN EXCLUSIVE;
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:158)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:114)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at android.content.ContentProviderProxy.update(ContentProviderNative.java:495)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at android.content.ContentResolver.update(ContentResolver.java:707)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at android.provider.ContactsContract$Contacts.markAsContacted(ContactsContract.java:984)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at android.provider.CallLog$Calls.addCall(CallLog.java:255)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at com.android.phone.CallLogAsync$AddCallTask.doInBackground(CallLogAsync.java:165)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at com.android.phone.CallLogAsync$AddCallTask.doInBackground(CallLogAsync.java:156)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at android.os.AsyncTask$2.call(AsyncTask.java:185)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
01-07 19:31:42.800: ERROR/AndroidRuntime(4530): ... 4 more
01-07 19:31:43.183: WARN/ActivityManager(4455): Force finishing activity com.android.phone/.InCallScreen
------解决方案--------------------
有两种情况：1，你的数据库文件不是有效的数据库文件 ;2，你在操作sqlite数据库时使用多线程了，但sqlite数据库是不支持多线程操作，所以你必须实现多线程同步的基质;