Question

我制作了一个数据库应用。我有一个按钮和一个int值;我需要改变int值。

示例= sayi = 1

按钮1。 click = sayi = 2 按钮2。 click = sayi = 3

P.s =对不起，我不太懂英语。

int sayi = 1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(layout.activity_main);
    final TextView oku = (TextView)findViewById(id.oku);
    final Button diger = (Button)findViewById(id.diger);
    diger.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int sayi = 2;
        }
    });


    Veritabani veritabanim;
    veritabanim = new Veritabani(this);
    try {

        veritabanim.createDataBase();

    } catch (IOException ioe) {
        throw new Error("Unable to create database");
    }

    SQLiteDatabase dbm = veritabanim.getReadableDatabase();



    Cursor c = dbm.rawQuery("SELECT _id,soyleyen,soz FROM sozler WHERE _id = "+sayi+" ", null);
    if(c.moveToFirst()){
        do{

            //assing values
            String column1 = c.getString(0);
            String column2 = c.getString(1);
            String column3 = c.getString(2);
            //Do something Here with values
            oku.setText(column3);

        }while(c.moveToNext());
    }
    c.close();
    dbm.close();
    }
}

Answer 1

这样做......

int sayi = 1;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(layout.activity_main);
Button diger = (Button)findViewById(id.diger);
diger.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        sayi++;
        getDBOperation();
    }
});
}

private void getDBOperation()
{
    TextView oku = (TextView)findViewById(id.oku);

    Veritabani veritabanim;
    veritabanim = new Veritabani(this);
    try {
        veritabanim.createDataBase();
    } catch (IOException ioe) {
        throw new Error("Unable to create database");
    }

    SQLiteDatabase dbm = veritabanim.getReadableDatabase();

   Cursor c = dbm.rawQuery("SELECT _id,soyleyen,soz FROM sozler WHERE _id = "+sayi+" ", null);
   if(c.moveToFirst()){
       do{
          //assing values
         String column1 = c.getString(0);
         String column2 = c.getString(1);
         String column3 = c.getString(2);
         //Do something Here with values
         oku.setText(column3);
       }while(c.moveToNext());
  }
  c.close();
  dbm.close();
  }

按钮单击并更改int值？

1 个答案: