为 android 上的片段实施 OnClickListener

implementing OnClickListener for a fragment on android

我有一个滑动菜单项目,在主页布局中,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 class 中导入此点击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(例如 findViewById 、 OnClickListener 、 onClick

上引发错误

按钮在此布局内 fragment_home.xml

  <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" />

您可以使用

rootView.findViewById(...)

在你的代码中,因为你的 class 没有 inherit/implement 这个方法

在使用 Fragment 时,您必须放大视图。

因此,当您想使用任何小部件时,您必须将视图对象与 findViewById() 一起使用。

就这样...

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;

     }

    }
}
        // 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view调用这个

首先...你应该在rootView中找到View如

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

然后就可以完成Button的操作了