在一个 C/C++ 程序中(或者脚本语言使用 Tcl/Ruby/Perl/Python 等) 你可以在一个特殊的名叫 SQLITE_MASTER 上执行一个SELECT查询以获得所有 表的索引。每一个 SQLite 数据库都有一个叫 SQLITE_MASTER 的表, 它定义数据库的模式。 SQLITE_MASTER 表看起来如下: CREATE TABLE sqlite_master ( type TEXT, name...
因为SQLite 对多线程的支持并不是很完善,如果两个线程同时操作数据库,因为数据库被另一个线程占用, 这种情况下会报“Database is locked” 的异常。所以在数据库管理类中使用单例模式,就可以保证无论在哪个线程中获取数据库对象,都是同一个。 最好的方法是所有的数据库操作统一到同一个线程队列管理,而业务层使...
libnativehelper/include/nativehelper/jni.h frameworks/base/core/java/android/os/MessageQueue.java frameworks/base/core/jni/android_os_MessageQueue.cpp frameworks/base/core/java/android/os/Binder.java frameworks/base/core/jni/android_util_Binder.cpp frameworks/base/media/java/android/media/MediaPlayer.j...
When creating a new file with getSharedPreferences(String, int), openFileOutput(String, int), or openOrCreateDatabase(String, int, SQLiteDatabase.CursorFactory), you can use the MODE_WORLD_READABLE and/or MODE_WORLD_WRITEABLE flags to allow any other package to read/write the file. When ...
Android.Database Android.Database.Sqlite Android.DeviceLock Android.Drm 安卓手勢 Android.Graphics Android.Graphics.Drawables Android.Graphics.Drawables.Shapes Android.Graphics.Fonts Android.Graphics.Pdf Android.Graphics.Pdf.Content Android.Graphics.Pdf.Models Android.Graphics.Pdf.Models.Selection Android.Graphics...
database.update("person", contentValues, "id = ?", new String[]{person.getId()}) > 0; } else { return database.insert("person", null, contentValues) != -1; } } public Person getPerson(String id) { Person person = null; Cursor cursor = null; try { SQLiteDatabase database = ...
The Azure Mobile Apps Client SDK also implements offline synchronization of data by using a SQLite database to store a copy of the server data locally. Operations performed on an offline table do not require mobile connectivity to work. Offline sync aids in resilience and performance at the...
To open a database: var db = null; document.addEventListener('deviceready', function() { db = window.sqlitePlugin.openDatabase({ name: 'my.db', location: 'default', }); }); IMPORTANT: Like with the other Cordova plugins your application must wait for the deviceready event. This is ...
Swift Database: build fast mobile apps for iOS (and macOS) Dart/Flutter Database: cross-platform for mobile and desktop apps Go Database: great for data-driven tools and embedded server applications C and C++ Database: native speed with zero copy access to FlatBuffer objects ...
You could do it by surrounding the filename in 'single quotes' in the string you pass in to SQLite, but it`s cleaner and safer to pass it as a separate argument, like this: sqliteDatabase.update(AndroidOpenDbHelper.TABLE_FILE, values, AndroidOpenDbHelper.COLUMN_NAME_FILE_NAME+"=?", ...