如何为自定义列表视图中的按钮实现“Onclick”

Question

我在自定义列表视图中有三个按钮，列表视图在片段中而不是在活动中，但是当我设置 onclick listner 时。它抛出异常空对象引用传递。 custome_list_view.xml

        <Button
        android:text="@string/pickUpButtonText"
        android:textColor="#FFFFFF"
        android:textSize="16sp"

        android:layout_width="wrap_content"
        android:layout_height="@dimen/standard_hight"
        android:background="@drawable/buttonshape"
        android:shadowColor="#5BA84F"
        android:shadowDx="0"
        android:shadowDy="0"
        android:shadowRadius="5"
        android:id="@+id/button_pickup_list"

        />

customeListView.Java

        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_jobs, container, false);

    ArrayList<JobListDataProvider> listJobs = GetRequests();
    ListView lv = (ListView)rootView.findViewById(R.id.listViewJobs);
    lv.setAdapter(new JobsListAdapter(getActivity(), listJobs));
    //.....bindind on click....
    Button pickup = (Button) rootView.findViewById(R.id.button_pickup_list);
    pickup.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //......................
        }
    });
    return rootView;
}

Answer 1

您必须将此代码放在公共视图 onCreateView 中的 JobsListAdapter 中

Button pickup = (Button) rootView.findViewById(R.id.button_pickup_list);
pickup.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        //......................
    }
});