在Sqlite android中插入整数值

我试图插入整数值，但它不能接受这些值。它接受第二个字符串值并给出数据类型的异常

这是我的插入代码

这是选择代码

这是Logcat错误：

它不能接受int值。它将向上移动到“角度”值

这是我的创建表查询

这是我的分类课：

---

在代码行下面更改-

Category.setID(Integer.parseInt(cursor.getString(0)));
Category.setimg(Integer.parseInt(cursor.getString(1)));

到-

如下所示更改您的创建表查询-

String CREATE_CategoryS_TABLE = "CREATE TABLE " + TABLE_CategoryS + "("
        + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_IMG + " INTEGER," +
        KEY_NAME + " TEXT," + KEY_SELECTION + " TEXT"  + ")";

---

如果修改数据库的表，则必须更改数据库的版本，或者可以卸载并重新安装应用程序。从游标读取数据时，在遍历游标之前，始终使用

cursor.movetoFirst

。

显示创建表SQL QueryCategory.setID（Integer.parseInt（cursor.getString（0））；为什么要将“Angle”解析为int呢？您显示的是表SQLite结构和类别classno我不会将“Angle”解析为int，而不是“R.drawable.Angle”它的“Angle”重视并给予error@AanalShah：尝试卸载应用程序，然后运行它，因为您可能已在创建db后更改了创建表查询。由于以下原因导致无法插入并给出错误

：java.lang.IllegalStateException:无法从CursorWindow读取第0行第3列。在访问数据之前，请确保光标已正确初始化。

好的，您没有在表中插入ID值，因此您可以手动输入它，或者在删除img列ID时自动递增。自动生成只需更改创建表查询并查看它是否工作我更改查询“创建表”+TABLE_categoris+“（“+KEY_ID+”整型主键自动递增，“+KEY_IMG+”整型，“+KEY_NAME+”文本，“+KEY_SELECTION+”文本“+”）”但它会给出同样的错误

db.addCategory(new Category(R.drawable.angle, "Angle", "true"));
db.addCategory(new Category(R.drawable.angle, "Area", "true"));
db.addCategory(new Category(R.drawable.angle,"Currency", "true"));
db.addCategory(new Category(R.drawable.angle,"Current", "true"));
db.addCategory(new Category(R.drawable.angle,"Density", "true"));
db.addCategory(new Category(R.drawable.angle,"Length", "true"));

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:745)
    Caused by: java.lang.NumberFormatException: Invalid int: "Angle"
at java.lang.Integer.invalidInt(Integer.java:138)
at java.lang.Integer.parse(Integer.java:410)

public void onCreate(SQLiteDatabase db) {
    String CREATE_CategoryS_TABLE = "CREATE TABLE " + TABLE_CategoryS + "("
        + KEY_ID + " INTEGER PRIMARY KEY," + KEY_IMG + "INTEGER," +
        KEY_NAME + " TEXT," + KEY_SELECTION + " TEXT"  + ")";
    db.execSQL(CREATE_CategoryS_TABLE);
}

public class Category 
{
    int id;
    int img;
    String name = null;
    String selected = "true";
    public Category()
    {

    }

    public Category(int img, String name, String selected) {

        this.name = name;
        this.selected = selected;
        this.img = img;
    }
    public Category(int id,int img, String name, String selected) {

        this.id = id;
        this.name = name;
        this.selected = selected;
        this.img = img;
    }

    public int getID() { return id; }

    public void setID(int id) {
        this.id = id;
    }

    public int getimg() { return img; }

    public void setimg(int img) {
        this.img = img;
    }

    public String getName() { return name; }

    public void setName(String name) {
        this.name = name;
    }

    public String isSelected() {
        return selected;
    }

    public void setSelected(String selected) {
        this.selected = selected;
    }
}

Category.setID(Integer.parseInt(cursor.getString(0)));
Category.setimg(Integer.parseInt(cursor.getString(1)));

Category.setID(cursor.getInt(0));
Category.setimg(cursor.getInt(1));

String CREATE_CategoryS_TABLE = "CREATE TABLE " + TABLE_CategoryS + "("
        + KEY_ID + " INTEGER PRIMARY KEY AUTOINCREMENT," + KEY_IMG + " INTEGER," +
        KEY_NAME + " TEXT," + KEY_SELECTION + " TEXT"  + ")";