Android Eclipse findViewByID with programmatically CheckBox

问题

I create a few CheckBoxes programatically like this:

    public int cb_id = 1000;

    public void create_cb()
    {

            CheckBox cb1 = new CheckBox(this);
            cb1.setText("My CheckBox");
            cb1.setId(cb_id);

            LinearLayout ll_checkbox = (LinearLayout) findViewById(R.id.ll_checkbox);

            ll_checkbox.addView(cb1);

    }

This work's fine for me, but I can't find the CheckBox with the ID...

    public void find_cb()
    {

            CheckBox cb1 = (CheckBox) findViewById(cb_id);

            String content = cb1.getText().toString();

    }

This is not working, the app is closing.

回答1:

use following code:

public void find_cb()
{
     LinearLayout ll_checkbox = (LinearLayout) findViewById(R.id.ll_checkbox);
     CheckBox cb1 = (CheckBox) ll_checkbox.findViewById(cb_id);
     String content = cb1.getText().toString();
}

回答2:

Try this..

Use

CheckBox cb1;

as Global like public int cb_id = 1000; and inside create_cb() method just use cb1 = new CheckBox(this); and find_cb() method like below

public void find_cb()
{
   String content = cb1.getText().toString();
}

来源：https://stackoverflow.com/questions/21497816/android-eclipse-findviewbyid-with-programmatically-checkbox