java - 根据单选按钮选择更改/替换 fragment

Question

我有 Activity 作为两个单选按钮我想根据单选按钮选择更改/替换 fragment

public class SignUp extends FragmentActivity implements OnCheckedChangeListener {

RadioGroup rg;
Signup_BloodBank sb;  //fragment 1
Signup_User su;   //fragment 2
android.support.v4.app.FragmentTransaction ft;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_sign_up);

    rg = (RadioGroup) findViewById(R.id.rg1);
    rg.setOnCheckedChangeListener(this);

    sb = new Signup_BloodBank();
    su = new Signup_User();

    RadioButton btn1 = (RadioButton)findViewById(R.id.rbBloodBank);
    btn1.setChecked(true);
    getSupportFragmentManager().beginTransaction().add(R.id.linear2, sb).commit();


}

@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {

    ft = getSupportFragmentManager().beginTransaction();
    switch (checkedId) {
    case R.id.rbBloodBank:
            ft.replace(R.id.linear2,sb);
    case R.id.rbUser:
        ft.replace(R.id.linear2,su);
        break;

    default:
        break;
    }
    ft.commit();
}

}

fragment 1

public class Signup_BloodBank extends Fragment {
    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        container.removeAllViews();
        return inflater.inflate(R.layout.fragment_sing_up__bb, null);
    }

}

fragment 2

公共(public)类 Signup_User 扩展 Fragment {
@覆盖
public View onCreateView(LayoutInflater inflater, ViewGroup 容器,
bundle 已保存实例状态) {
容器.removeAllViews();
return inflater.inflate(R.layout.fragment_sign_up__user, null);
}
}

Answer 1

如果没有对您所面临的问题进行更详细的解释，我将假设它不适合您。

粗略浏览一下，下面的代码在 .replace 之后缺少 .commit() 。

case R.id.rbBloodBank:
    ft.replace(R.id.linear2,sb);
case R.id.rbUser:
    ft.replace(R.id.linear2,su);