Android: How to get ID of checkBox which added with setId()

I create 8 checkboxes with a loop.

And I want to check a random unchecked checkboxes with a click on one of them.

public class LevelActivity extends AppCompatActivity implements View.OnClickListener {

    int wrapContent = LinearLayout.LayoutParams.WRAP_CONTENT;
    LinearLayout llLevel;
    int iNumCheckButtons;
    int i;

@Override
protected void onCreate(Bundle savedInstanceState) {

    i = 0;
    llLevel = (LinearLayout) findViewById(R.id.llLevel);
    LinearLayout.LayoutParams lParams = new LinearLayout.LayoutParams(wrapContent, wrapContent);
    int btnGravity = Gravity.CENTER;
    lParams.gravity = btnGravity;

    iNumCheckButtons = 8;

    while(i < iNumCheckButtons) {
        CheckBox chbNew = new CheckBox(this);
        chbNew.setText("CheckBox #"+i);
        chbNew.setId(i);
        llLevel.addView(chbNew, lParams);
        i++;
    }
}

@Override
public void onClick(View v) {
    CheckBox chbView;
    Random r = new Random();
    int i1 = r.nextInt(3);
    int i2 = r.nextInt(8);

    switch (v.getId()) {
        case 0:
            for (int i = 0; i < i1; i++) {
                if (i == i2) {
                    // How TODO this code //
                    ////////////////////////
                    chbView = findViewById(R.id.i2);
                    chbView.setChecked(true);
                }
            }
        break;
        case 1:
            // ...
        break;
    // ...
    }
}

}

How to find view which has integer ID. Is could be right type like "findViewById(R.id.0);"

Create a views with current ID's in layout?