Question

我是Android的新手，我使用Flexible Fragment遇到了这个问题。我有一个名为mainActivity和Fragment的活动，名为RegisteractivityFragment。

我在主要活动中加载片段但是当我点击片段按钮时应用程序关闭。这是我的registerActivityFragment.java的一些部分

    public class RegisterActivityFragment extends Fragment {


public interface OnButtonsClicked {

    public void onRegisterClicked();
    public void onNextTimeclicked();
}
 OnButtonsClicked buttonClickListener ;

    //some codes

    public void onAttach(Activity activity) {
        super.onAttach(activity);

        // This makes sure that the container activity has implemented
        // the callback interface. If not, it throws an exception.
        try {
            buttonClickListener = (OnButtonsClicked) activity;
        } catch (ClassCastException e) {
            throw new ClassCastException(activity.toString()
                    + " must implement OnButtonsClicked Functions");
        }
    }


public void clickRegister(View view)
 {


    buttonClickListener.onRegisterClicked();
 }  
public void clickNextTime(View view)
{

buttonClickListener.onNextTimeclicked();
}



}

这是我的MainActivity.java

 public class MainActivity extends ActionBarActivity implements    RegisterActivityFragment.OnButtonsClicked {

RegisterActivityFragment registerFragment= new RegisterActivityFragment();
@Override
public void onCreate(Bundle savedInstanceState){

    //adding Fragment to activity



}

    //implementing the interface
@Override
public void onRegisterClicked() {
    // TODO Auto-generated method stub
    Toast toast =  Toast.makeText(MainActivity.this,"asd",Toast.LENGTH_LONG);
    toast.setGravity(Gravity.CENTER,0,0);
    toast.show();
}

@Override
public void onNextTimeclicked() {

    Toast toast =  Toast.makeText(MainActivity.this,"asd",Toast.LENGTH_LONG);
    toast.setGravity(Gravity.CENTER,0,0);
    toast.show();

}

}

Answer 1

你必须覆盖RegisterActivityFragment类中的onCreateView方法来设置像这样的onClickListner

private Button foo; // as globle var


@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
  Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_rssitem_detail,
    container, false);
foo = view.findViewByid(R.id.foo); // button id
foo.setOnClickListener(new OnClickListener() {
   public void onClick(View v)
   {
      OnButtonsClicked.onRegisterClicked();
   } 
});
return view;
}

您的问题是在xml文件中设置属性OnClick =“clickRegister”并在片段中定义方法实际上你必须在MainActivity中定义它而不是Fragment

所以解决问题的第二种方法是将2方法移动到MainActivity：

public void clickRegister(View view)
{


    buttonClickListener.onRegisterClicked();
}  
public void clickNextTime(View view)
{

buttonClickListener.onNextTimeclicked();
}



}

onclicked灵活的碎片按钮不起作用

1 个答案: