@Override
public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
try {
super.onDowngrade(db, oldVersion, newVersion);
} catch (Exception e) {
e.printStackTrace();
dropTables(db);
onCreate(db);
}
/**
* When users install qiupu from high version to low version, we need to support. comments:
* 1.drop all tables and re-create database. 2.save high version database's data. 3.when do
* so, it will use the installing application's version to decide how to create database and
* tables.
*/
}
@Override
public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
super.onDowngrade(db, oldVersion, newVersion);
}
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
@Override
public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
super.onDowngrade(db, oldVersion, newVersion);
}
private SQLiteDatabase getDatabaseLocked(boolean writable) {
if (mDatabase != null) {
if (!mDatabase.isOpen()) {
// Darn! The user closed the database by calling mDatabase.close().
mDatabase = null;
} else if (!writable || !mDatabase.isReadOnly()) {
// The database is already open for business.
return mDatabase;
}
}
if (mIsInitializing) {
throw new IllegalStateException("getDatabase called recursively");
}
SQLiteDatabase db = mDatabase;
try {
mIsInitializing = true;
if (db != null) {
if (writable && db.isReadOnly()) {
db.reopenReadWrite();
}
} else if (mName == null) {
db = SQLiteDatabase.create(null);
} else {
try {
if (DEBUG_STRICT_READONLY && !writable) {
final String path = mContext.getDatabasePath(mName).getPath();
db =
SQLiteDatabase.openDatabase(
path, mFactory, SQLiteDatabase.OPEN_READONLY, mErrorHandler);
} else {
db =
mContext.openOrCreateDatabase(
mName,
mEnableWriteAheadLogging ? Context.MODE_ENABLE_WRITE_AHEAD_LOGGING : 0,
mFactory,
mErrorHandler);
}
} catch (SQLiteException ex) {
if (writable) {
throw ex;
}
Log.e(TAG, "Couldn't open " + mName + " for writing (will try read-only):", ex);
final String path = mContext.getDatabasePath(mName).getPath();
db =
SQLiteDatabase.openDatabase(
path, mFactory, SQLiteDatabase.OPEN_READONLY, mErrorHandler);
}
}
onConfigure(db);
final int version = db.getVersion();
if (version != mNewVersion) {
if (db.isReadOnly()) {
throw new SQLiteException(
"Can't upgrade read-only database from version "
+ db.getVersion()
+ " to "
+ mNewVersion
+ ": "
+ mName);
}
db.beginTransaction();
try {
if (version == 0) {
onCreate(db);
} else {
if (version > mNewVersion) {
onDowngrade(db, version, mNewVersion);
} else {
onUpgrade(db, version, mNewVersion);
}
}
db.setVersion(mNewVersion);
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
}
onOpen(db);
if (db.isReadOnly()) {
Log.w(TAG, "Opened " + mName + " in read-only mode");
}
mDatabase = db;
return db;
} finally {
mIsInitializing = false;
if (db != null && db != mDatabase) {
db.close();
}
}
}