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Commit 497b5fab authored by Fyodor Kupolov's avatar Fyodor Kupolov
Browse files

Optimized database creation for a new user 

If the file doesn't exist, database can be kept in memory. It's safe because
the database will be migrated and disposed of immediately after onCreate
finishes.

Bug: 26237300
Change-Id: Ib37c520f28960c8d6b9ce8dd719ffbcc11a97a58
parent 1d724e02

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

+18 −0
Original line number Diff line number Diff line
@@ -116,6 +116,12 @@ class DatabaseHelper extends SQLiteOpenHelper { 
            // cleaned up automatically when the user is deleted.

            File databaseFile = new File(

                    Environment.getUserSystemDirectory(userHandle), DATABASE_NAME);

            // If databaseFile doesn't exist, database can be kept in memory. It's safe because the

            // database will be migrated and disposed of immediately after onCreate finishes

            if (!databaseFile.exists()) {

                Log.i(TAG, "No previous database file exists - running in in-memory mode");

                return null;

            }

            return databaseFile.getPath();

        }

    }
@@ -130,8 +136,16 @@ class DatabaseHelper extends SQLiteOpenHelper { 
        return mValidTables.contains(name);

    }



    private boolean isInMemory() {

        return getDatabaseName() == null;

    }



    public void dropDatabase() {

        close();

        // No need to remove files if db is in memory

        if (isInMemory()) {

            return;

        }

        File databaseFile = mContext.getDatabasePath(getDatabaseName());

        if (databaseFile.exists()) {

            databaseFile.delete();
@@ -145,6 +159,10 @@ class DatabaseHelper extends SQLiteOpenHelper { 


    public void backupDatabase() {

        close();

        // No need to backup files if db is in memory

        if (isInMemory()) {

            return;

        }

        File databaseFile = mContext.getDatabasePath(getDatabaseName());

        if (!databaseFile.exists()) {

            return;