求教关于Android一个问题

@Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.button_1:
                ((Activity)getContext()).finish();
                break;
            case R.id.button_2:
                Intent intent=new Intent(Intent.ACTION_VIEW);
                intent.setData(Uri.parse("http://www.baidu.com"));
                getContext().startActivity(intent);
                break;
            default:
        }
    }