android-sqlite

问题 I am building mobile app using phonegap and am using Phonegap 2.9.0 version and SQLite Plugin from the https://github.com/pgsqlite/PG-SQLitePlugin-Android. I have include below js file in index.html, <script type="text/javascript" charset="utf-8" src="cordova.js"></script> <script type="text/javascript" charset="utf-8" src="SQLitePlugin.js"></script> then calling below method in deviceready event, var db = window.sqlitePlugin.openDatabase("test.db", "1.0", "test", 20000); I have also copy the

问题 I've created an SQLite database inside application, populated it and now I'm trying to read from it. The app keeps crashing and this is the logcat I receive: 12-30 05:53:18.008: E/AndroidRuntime(6205): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.testparsing/com.example.testparsing.Urnik}: android.database.sqlite.SQLiteException: unrecognized token: "4c" (code 1): , while compiling: SELECT predmet FROM predmeti WHERE dan=PONEDELJEK and ura=2 and oddelek=4c

问题 The app has data in a SQLite database. The UI is primarily a RecyclerView. The question is how to best to transfer data from the database into the UI, whilst keeping off the main thread? I originally planned to use a CursorLoader, ContentProvider, and RecyclerView. But reading around it looks like RecyclerView has no out-of-the-box support for Cursor-supplied data. Dang. That then leaves me with a few other options... AsyncTask to load the data, put it into model objects, and pass into the

问题 I just downloaded the new jar file for GreenDao in order to create my DB for the app I'm building. After going through all the process of modeling my entities and the connections between them, I tried to run the generator project but got this error for the line that generated the DB: Exception in thread "main" java.lang.NoClassDefFoundError: freemarker/template/ObjectWrapper at com.glide.talk.glide.model.generator.Model.main(Model.java:29) Caused by: java.lang.ClassNotFoundException:

问题 I developed an Android-App where I saved data in a SQLite database using the SQLiteOpenHelper. I am wondering if I could update my app by using ActiveAndroid, but in a way that the user data previously stored in the database will be preserved. Is that possible? 回答1: You would have to perform a data migration during runtime after the user upgrades to the newest version of the app. The process could be broken down into the following steps, I have also assigned database version values to each

问题 I'm in the process of creating a database that references keys in another database. Essentially, I have an import of data that I want to keep separate from one that will change, but if possible, I would like to reference the other keys via a FOREIGN KEY . So far as I know, I need to attach the database first to make that happen. Here's teh relevant code so far: public class LogDatabaseHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME = "log.db"; private static final

问题 I'm in the process of creating a database that references keys in another database. Essentially, I have an import of data that I want to keep separate from one that will change, but if possible, I would like to reference the other keys via a FOREIGN KEY . So far as I know, I need to attach the database first to make that happen. Here's teh relevant code so far: public class LogDatabaseHelper extends SQLiteOpenHelper { private static final String DATABASE_NAME = "log.db"; private static final

问题 I'm new to android app development and I just made a note app. I want to do unit tests for the insertNote, readNote and updateNote methods for the database. How do I go about this? This is the code for my database. Thanks. public class DatabaseManager extends SQLiteOpenHelper { public static final String Database_Name = "Notes Database"; public static final String Table_Name = "notes"; public static final String Column_id = "textId"; public static final String Column_title = "textTitle";

问题 When typing a SQLite statement as a string literal in a class in Android Studio, the IDE gives me this warning: "<expr> expected, got '?'" . I don't understand what this means, but the code is working fine, and I'd like to disable the inspection. But I don't know which inspection is causing it. There are thousands of them, and searching for or expected yields no useful results. The version of Android Studio is 3.0. It's happening with a whole bunch of different statements, but a typical one

问题 I've noticed in more than one SQLite tutorial that the table is recreated in the onCreate() event of the class that extends SQLiteOpenHelper . I've already created my SQLite database and tables outside the Android environment (Eclipse IDE) with the help of a Firefox add-in. The database tables reside in the expected spot: C:\aXX3&Space\Android\workspace\OnDemandAndAutomatic_Project\assets It seems bizarre to me that I would have to recreate them programmatically each time (obviously, they