带有Appcompactivity的Android片段

Question

package com.darkweb.android.amityaaroh.HomeActivity;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;

import com.darkweb.android.amityaaroh.R;

public  class events extends Fragment {

ListView listView;

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

};
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.events);

    initializeListView();
}




private void initializeListView() {

    listView = (ListView)getView().findViewById(R.id.listview);

    final String[] items = {"One", "Two", "Three", "Four", "Five", "Six", "Seven"};

    ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(getActivity(), R.layout.list_item, R.id.textView2, items);

    listView.setAdapter(arrayAdapter);

    listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            String item = items[position];

            Toast.makeText(events.this.getActivity(), item+" is clicked", Toast.LENGTH_LONG).show();
        }
    });
} 
}

错误:我们能将带有appcomactivity错误的片段：(29，9)错误:找不到符号方法setContentView(int)错误:执行失败的任务':app:compileDebugJavaWithJavac‘。

编译失败；有关详细信息，请参阅编译器错误输出。

Answer 1

移动并改变这个

(ListView)getView().findViewById(R.id.listview)；= listView

到onCreateView()

listView = rootView.findViewById(R.id.listview);

删除onCreate()方法

Answer 2

使用此代码将getview用于getActivity()，您可以在onCreateView下直接调用该方法

public class event extends Fragment {
    ListView listView;

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
        {
            View rootView = inflater.inflate(R.layout.events, container, false);
            initializeListView();
            return rootView;

        }

        private void initializeListView() {

            listView = (ListView)getActivity().findViewById(R.id.listview);

            final String[] items = {"One", "Two", "Three", "Four", "Five", "Six", "Seven"};


          ArrayAdapter<String> arrayAdapter= new ArrayAdapter<String> (getActivity(), android.R.layout.simple_list_item_1, items);
            listView.setAdapter(arrayAdapter);

            listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

                    String item = items[position];

                    Toast.makeText(events.this.getActivity(), item+" is clicked", Toast.LENGTH_LONG).show();
                }
            });
        }
    }


}