Question

我的代码是创建sqlite一个sqlite表，在点击添加按钮时保存输入数据，我想要做的是每次点击按钮NewTab都会创建一个新表，我搜索了无处不在，我尝试共享偏好也使表格的不同名称没有帮助我，任何人都可以帮助PLZ并感谢你。

public class MyDBHandler extends SQLiteOpenHelper{
public static final String DATABASE_NAME = "Shopping.db";
public static final String TABLE_NAME = "Main_table";

public static final String COL_2 = "NAME";
public static final String COL_3 = "PRICE";

public MyDBHandler(Context context) {
    super(context, DATABASE_NAME, null, 1);
}

@Override
public void onCreate(SQLiteDatabase db) {
    db.execSQL("create table " + TABLE_NAME +" (ID INTEGER PRIMARY KEY AUTOINCREMENT,NAME TEXT,PRICE TEXT)");
}

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
    db.execSQL("DROP TABLE IF EXISTS "+TABLE_NAME);
    onCreate(db);
}

public boolean insertData(String name,String price) {
    SQLiteDatabase db = this.getWritableDatabase();
    ContentValues contentValues = new ContentValues();
    contentValues.put(COL_2,name);
    contentValues.put(COL_3,price);
    long result = db.insert(TABLE_NAME,null ,contentValues);
    if(result == -1)
        return false;
    else
        return true;
}

public Cursor getAllData() {
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor res = db.rawQuery("select * from "+TABLE_NAME,null);
    return res;
}

}

MainActivty

    btnAddData.setOnClickListener(
                new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                        MyDBHandler myDb = new MyDBHandler(MainActivity.this);
                        boolean isInserted = myDb.insertData(editName.getText().toString(), null);
                        if (isInserted == true) {
                            Toast.makeText(MainActivity.this, "Data Inserted", Toast.LENGTH_LONG).show();
                            Cursor res = myDb.getAllData();

                            while (res.moveToNext()) {
                                final TextView textView = new TextView(MainActivity.this);

                                String valor1 = "<p style='font-family:verdana'>" + a + "</p> ";
                                textView.setText(Html.fromHtml(valor1));
                                lin.addView(textView);



                            }


                        } else {
                            Toast.makeText(MainActivity.this, "Data not Inserted", Toast.LENGTH_LONG).show();
                        }
                    }
                }
        );

Answer 1

创建一个你通过sharedPreferences保存的变量，这是你的table count然后创建一个sql数据库，然后再做

SQLDATABASENAME.execSql("CREATE TABLE Table" + your_counter_variable_ + " #create rows here ;");

Answer 2

您还可以使用实际时间获取所有表格的唯一ID

动态创建sqlite表

2 个答案: