java 在 android 上为片段实现 OnClickListener
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implementing OnClickListener for a fragment on android
提问by Mac Taylor
I have a sliding menu project and inside home layout another layout is called as a fragment :
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：
this is the HomeFragment.java :
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;
}
}
I need to import this click listener inside my java class in order to submit a form .
我需要在我的 java 类中导入这个点击监听器才能提交一个表单。
//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();
}
}
But when I add the above code snippet it throws me an error on undefined methods such as findViewById , OnClickListener , onClick
但是当我添加上面的代码片段时，它会在诸如 findViewById 、 OnClickListener 、 onClick 等未定义方法上引发错误
The button is inside this layout fragment_home.xml
该按钮位于此布局 fragment_home.xml 内
<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" />
回答by Pragnesh Ghoda シ
While working with Fragment, you have to inflate view.
在使用 时Fragment，您必须扩大视图。
So when you want to use any widget you have to use view object with findViewById().
因此，当您想使用任何小部件时，您必须使用带有findViewById().
Simply Do like this...
简单地做这样...
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;
}
}
OR try other way..
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;
}
}
}
回答by Jigar Joshi
You can use
您可以使用
rootView.findViewById(...)
in your code, because your class doesn't inherit/implement this method
在你的代码中，因为你的类没有继承/实现这个方法
回答by Akira
first...you should findView in rootView such as
首先......你应该在 rootView 中找到View，例如
btnCheckFalAction = (Button) rootView.findViewById(R.id.btnCheckFal);
then you can finish Button's operation
然后就可以完成Button的操作了
回答by ali hussnain
// 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();
}
});
you can call this by view
你可以通过视图调用它
