Question

我有一个滑动菜单项目，在内部布局中，另一个布局称为片段：

这是HomeFragment.java：

package info.androidhive.slidingmenu;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

public class HomeFragment extends Fragment {

    public HomeFragment(){}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_home, container, false);

        return rootView;
    }
}

我需要在我的java类中导入这个click侦听器才能提交表单。

//CheckFal:
            btnCheckFalAction = (Button) findViewById(R.id.btnCheckFal);
            btnCheckFalAction.setOnClickListener(new OnClickListener() {           

                  @Override
                  public void onClick(View v) 
                  {
                      Toast.makeText(this, "Hello World", Toast.LENGTH_LONG).show();
                  }    
                }

但是当我添加上面的代码片段时，它会在未定义的方法上引发错误，例如findViewById，OnClickListener，onClick

该按钮位于此布局fragment_home.xml

中

  <Button
      android:id="@+id/btnCheckFal"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_below="@+id/relativeLayout1"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="19dp"
      android:text="@string/CheckFal" />

Answer 1

使用Fragment时，您必须对视图进行充气。

因此，当您想要使用任何小部件时，您必须使用findViewById()的视图对象。

简单地这样做......

public class HomeFragment extends Fragment {

    public HomeFragment(){}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_home, container, false);

            btnCheckFalAction = (Button) rootView.findViewById(R.id.btnCheckFal); // you have to use rootview object..
            btnCheckFalAction.setOnClickListener(new OnClickListener() {           

                  @Override
                  public void onClick(View v) 
                  {
                      Toast.makeText(getActivity(), "Hello World", Toast.LENGTH_LONG).show();
                  }    
                });

        return rootView;
    }
}

或尝试其他方式..

public class HomeFragment extends Fragment implements OnClickListener{

    public HomeFragment(){}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {

        View rootView = inflater.inflate(R.layout.fragment_home, container, false);

            btnCheckFalAction = (Button) rootView.findViewById(R.id.btnCheckFal); // you have to use rootview object..
            btnCheckFalAction.setOnClickListener(this);

        return rootView;
    }
    @Override
    public void onClick(View v) {
     // TODO Auto-generated method stub
     switch(v.getId()){

     case R.id.btnCheckFal :
         //your code...
     break;

    default:
        break;

     }

    }
}

Answer 2

您可以使用

rootView.findViewById(...)

在您的代码中，因为您的类没有继承/实现此方法

Answer 3

首先......您应该在rootView中找到View，例如

btnCheckFalAction = (Button) rootView.findViewById(R.id.btnCheckFal);

然后你可以完成Button的操作

Answer 4

        // Inflate the layout for this fragment in on create

         RelativeLayout mLinearLayout = (RelativeLayout) inflater.inflate(R.layout.fragment_a,
                container, false);
         cd = new ConnectionDetector(getActivity());




ImageButton mButton = (ImageButton) mLinearLayout.findViewById(R.id.imageButton1);
mButton.setOnClickListener(new OnClickListener() {
    @Override
    public void onClick(View v) {
        // here you set what you want to do when user clicks your button,
        // e.g. launch a new activity

        Toast.makeText(getActivity(),"Opening Maps",Toast.LENGTH_LONG).show();


    }
});

你可以通过视图

来调用它

在android上为片段实现OnClickListener

4 个答案: