Room persistance library. Delete all
You can create a DAO method to do this.
@Dao
interface MyDao {
@Query("DELETE FROM myTableName")
public void nukeTable();
}
As of Room 1.1.0
you can use clearAllTables() which:
Deletes all rows from all the tables that are registered to this database as entities().
If want to delete an entry from the the table in Room simply call this function,
@Dao
public interface myDao{
@Delete
void delete(MyModel model);
}
Update: And if you want to delete complete table, call below function,
@Query("DELETE FROM MyModel")
void delete();
Note: Here MyModel is a Table Name.
Use clearAllTables() with RXJava like below inorder to avoid java.lang.IllegalStateException: Cannot access database on the main thread since it may potentially lock the UI for a long period of time.
Completable.fromAction(new Action() {
@Override
public void run() throws Exception {
getRoomDatabase().clearAllTables();
}
}).subscribeOn(getSchedulerProvider().io())
.observeOn(getSchedulerProvider().ui())
.subscribe(new Action() {
@Override
public void run() throws Exception {
Log.d(TAG, "--- clearAllTables(): run() ---");
getInteractor().setUserAsLoggedOut();
getMvpView().openLoginActivity();
}
}, new Consumer<Throwable>() {
@Override
public void accept(Throwable throwable) throws Exception {
Log.d(TAG, "--- clearAllTables(): accept(Throwable throwable) ----");
Log.d(TAG, "throwable.getMessage(): "+throwable.getMessage());
}
});