After upgrade, it prompts "android.process.acore" to stop execution--analysis solution

OTA upgrade, upgrade caused by all the problems can be explained, some can solve, and some cannot solve.

A project reported the problem.

Power on after upgrade to prompt "Android.process.acore" to stop execution

Grab the ADB log and see the following fatal log

11-06 14:40:33.633 3827 3827 E androidruntime:fatal exception:main
11-06 14:40:33.633 3827 3827 E AndroidRuntime:Process:android.process.acore, pid:3827
11-06 14:40:33.633 3827 3827 E AndroidRuntime:java.lang.RuntimeException:Unable to get provider Com.android.providers. Contacts. CallLogProvider:android.database.sqlite.SQLiteException:Can ' t downgrade database from version 851 to 850
11-06 14:40:33.633 3827 3827 E androidruntime:At Android.app.ActivityThread.installProvider (activitythread.java:5043)
11-06 14:40:33.633 3827 3827 E androidruntime:At Android.app.ActivityThread.installContentProviders (activitythread.java:4614)
11-06 14:40:33.633 3827 3827 E androidruntime:At Android.app.ActivityThread.handleBindApplication (activitythread.java:4547)
11-06 14:40:33.633 3827 3827 E androidruntime:At android.app.activitythread.access$1500 (activitythread.java:151)
11-06 14:40:33.633 3827 3827 E androidruntime:At Android.app.activitythread$h.handlemessage (activitythread.java:1402)
11-06 14:40:33.633 3827 3827 E androidruntime:At Android.os.Handler.dispatchMessage (handler.java:110)
11-06 14:40:33.633 3827 3827 E androidruntime:At Android.os.Looper.loop (looper.java:193)
11-06 14:40:33.633 3827 3827 E androidruntime:At Android.app.ActivityThread.main (activitythread.java:5324)
11-06 14:40:33.633 3827 3827 E androidruntime:At Java.lang.reflect.Method.invokeNative (Native Method)
11-06 14:40:33.633 3827 3827 E androidruntime:At Java.lang.reflect.Method.invoke (method.java:515)
11-06 14:40:33.633 3827 3827 E androidruntime:At Com.android.internal.os.zygoteinit$methodandargscaller.run (zygoteinit.java:829)
11-06 14:40:33.633 3827 3827 E androidruntime:At Com.android.internal.os.ZygoteInit.main (zygoteinit.java:645)
11-06 14:40:33.633 3827 3827 E androidruntime:At Dalvik.system.NativeStart.main (Native Method)

There is a problem with the database from log to see the Om.android.providers.contacts contact module. The solution to the problem is Can ' t downgrade database from version 851 to 850. So. You cannot demote a database from the advanced version number to a lower version number database. This should be caused by the limitations of Android.

Google for what?

Stackvoerflow someone explained, let's say you inherit the following Ondowngrade to be able. But the contact is not able to do so ~ ~

You is usingAndroid SQLiteOpenHelper, you need to overrideonDowngradeIf you want to is able to run your application with a database on the device with a higher version than your code can handle.

Should care about this "Database Version thing" if ever your the database schema is ever going to There is good chance it would).

Workaround: Back up the contact data first.

(Preferably a network backup, the full backup of the DB may not be effective)

Method One

1 Settings-Application Management--contacts--Empty data 2 settings-Application management--dial pad-empty data

Method Two, set-Restore factory settings-erase all data. And then you take the initiative to reboot to recovery and then you can--just wait a minute.

After upgrade, it prompts "android.process.acore" to stop execution--analysis solution