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Commit 88fecd39 authored by p4r4n01d's avatar p4r4n01d Committed by Gerrit Code Review
Browse files

Wipe and re-create database on downgrade. 

Not a very common situation but should fix some errors that could
 arise from flashing an old ROM over a new one, without wiping data.

Change-Id: I27f2a00396761105987830921bb3f8cb339d2171
parent 7d5b16e3

packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java

+31 −19
Original line number Diff line number Diff line
@@ -1566,6 +1566,12 @@ public class DatabaseHelper extends SQLiteOpenHelper { 
        if (upgradeVersion != currentVersion) {

            Log.w(TAG, "Got stuck trying to upgrade from version " + upgradeVersion

                    + ", must wipe the settings provider");

            wipeDB(db, oldVersion, upgradeVersion, currentVersion);

        }

    }



    private void wipeDB(SQLiteDatabase db, int oldVersion, int upgradeVersion,

     int currentVersion) {

        db.execSQL("DROP TABLE IF EXISTS global");

        db.execSQL("DROP TABLE IF EXISTS globalIndex1");

        db.execSQL("DROP TABLE IF EXISTS system");
@@ -1586,6 +1592,12 @@ public class DatabaseHelper extends SQLiteOpenHelper { 
        db.execSQL("INSERT INTO secure(name,value) values('" +

                "wiped_db_reason" + "','" + wipeReason + "');");

    }



    @Override

    public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {

        // Not much can be done here - wipe database completely and create anew

        // otherwise an exception will be thrown on boot preventing startup.

        wipeDB(db, oldVersion, newVersion, oldVersion);

    }



    private String[] hashsetToStringArray(HashSet<String> set) {