Question

我有以下代码＆amp;希望arraylist中的所有数据都来自sqlite数据库

import android.app.Activity;

public DataSingleton()  {
    visibleSections = new ArrayList<>();
    visibleSections.add("Who We Are");
    visibleSections.add("What We Do");
    visibleSections.add("How Can You Help");
   visibleSections.add("Take a Look");
   visibleSections.add("In The News");
   visibleSections.add("Get In Touch");
  }
}

Answer 1

在该模型中创建一个模型，生成所需变量的getter和setter方法。

public static String query_select_all = "SELECT * FROM " + TABLENAME;

public ArrayList<model> DataSingleton()
 {
ArrayList<visible_Model> visibleSections  = new  ArrayList<visible_Model>();


    Cursor cursor = database_helper.rawQuery(query_select_all, null);

    if (cursor.moveToFirst()) {
        do {
            visible_Model model = new visible_Model();

            model.setMessage(cursor.getString(cursor
                    .getColumnIndex(COLUMN_FROM_MSG)));

            visibleSections.add(model);

        } while (cursor.moveToNext());

    }
    return visibleSections;
}

在这里，我在上面创建模型名称作为visile_model并使用setMessage方法。最后我将该模型添加到arraylist中 visibleSections

如何在Arraylist中检索Android Sqlite数据库

1 个答案: