萌新求救，SQLite

[Icanitbut]

因为初学android，所以很多东西还不会用，现在只会做些简单页面，还有页面跳转什么的，但是现在要用到数据，网上查了android中用的是SQLite，但是在android studio中怎样找到它，都不到，然后求大神指教，最好在教教我怎样调用写完的数据（是在android studio中哦）

[xiaoxiao701111]

Android数据库操作还区分什么工具吗？都一样的代码，如果你导入数据库某些类不正确说明你as配的不对。

[King_Kwin]

SQLite 是Android系统内嵌的一个轻量级数据库，as里通过代码处理就好了啊，无非建表增删改查什么的

[=10_01=]

看下文档吧， 从数据库读取信息： https://developer.android.google.cn/training/basics/data-storage/databases.html#ReadDbRow 官方示例代码： https://github.com/googlesamples/android-architecture/blob/todo-mvp/todoapp/app/src/main/java/com/example/android/architecture/blueprints/todoapp/data/source/local/TasksLocalDataSource.java

        SQLiteDatabase db = mDbHelper.getReadableDatabase();

        String[] projection = {
                TaskEntry.COLUMN_NAME_ENTRY_ID,
                TaskEntry.COLUMN_NAME_TITLE,
                TaskEntry.COLUMN_NAME_DESCRIPTION,
                TaskEntry.COLUMN_NAME_COMPLETED
        };

        Cursor c = db.query(
                TaskEntry.TABLE_NAME, projection, null, null, null, null, null);

        if (c != null && c.getCount() > 0) {
            while (c.moveToNext()) {
                String itemId = c.getString(c.getColumnIndexOrThrow(TaskEntry.COLUMN_NAME_ENTRY_ID));
                String title = c.getString(c.getColumnIndexOrThrow(TaskEntry.COLUMN_NAME_TITLE));
                String description =
                        c.getString(c.getColumnIndexOrThrow(TaskEntry.COLUMN_NAME_DESCRIPTION));
                boolean completed =
                        c.getInt(c.getColumnIndexOrThrow(TaskEntry.COLUMN_NAME_COMPLETED)) == 1;
                Task task = new Task(title, description, itemId, completed);
                tasks.add(task);
            }
        }
        if (c != null) {
            c.close();
        }

        db.close();