استفاده از یک اکتیویتی

final CheckBox boxOne = (CheckBox) findViewById(R.id.boxOne);
final CheckBox boxTwo = (CheckBox) findViewById(R.id.boxTwo);
boxOne.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton view, boolean isChecked) {
                if (isChecked) {
                    nextPage(" textOne ", ActivityOne.this, ActivityNext.class);
                }
            }
            boxTwo.setOnCheckedChangeListener(new OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton view, boolean isChecked) {
                if (isChecked) {
                    nextPage(" textTwo ", ActivityOne.this, ActivityNext.class);
                }
            }
        });         
        private void nextPage(String str, Context cntx, Class<?> page) {
        Intent intent = new Intent(cntx, page);
        intent.putExtra("Text", str);
        ActivityOne.this.startActivity(intent);
    }
}

String string= "";
        Bundle extras = getIntent().getExtras();
        if (extras != null) {
            string= extras.getString("Text");
        }

از اینم توی اکتیویتی دوم استفاده کن...