在Fragment中添加ListView

在Fragment中，几个主要生命周期的创建过程

　　onCreate 创造页面

　　onCreateView 创造View

　　onStart 开始

三种获取LayoutInflater的方式

　　

 LayoutInflater inflater=LayoutInflater.from(getContext());

 LayoutInflater inflater=getLayoutInflater();

 LayoutInflater localinflater = 
　　　　　　　　(LayoutInflater)context.getSystemService（Context.LAYOUT_INFLATER_SERVICE);

其中的onCreate负责创建Fragment的View，必须要进行重写

将页面的初始化放在onCreateView中

示例代码：

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState)
    {
        Log.d("TAG","onCreateView");
        //创建界面MsgFragment
        contentView=inflater.inflate(R.layout.fragment_msg,container,false);

        //界面的初始化
        myListAdapter=new MyListAdapter();
        ListView listView=(ListView)contentView.findViewById(R.id.id_listview_msgfragment);
        listView.setAdapter(myListAdapter);
        return contentView;

    }

重写方法onStart()

    @Override
    public void onStart() {
        Log.d("TAG","onStart");
        demo();
        super.onStart();
    }
    /////////////////////添加数据
    private void demo()
    {
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
    }

MsgFragment.java

package com.example.senior0302_test2;


import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

import java.util.ArrayList;


/**
 * A simple {@link Fragment} subclass.
 */
public class MsgFragment extends Fragment {

    ArrayList<Con>listData=new ArrayList<>();
    MyListAdapter myListAdapter;
    View  contentView;




    public MsgFragment() {

    }

    @Override
    public void onStart() {
        Log.d("TAG","onStart");
        demo();
        super.onStart();
    }
    /////////////////////添加数据
    private void demo()
    {
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
        listData.add(new Con("日前,国家卫健委有关负责人表示,我国正采取多"));
    }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        Log.d("TAG","onCreate");
        super.onCreate(savedInstanceState);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState)
    {
        Log.d("TAG","onCreateView");
        //创建界面MsgFragment
        contentView=inflater.inflate(R.layout.fragment_msg,container,false);

        //界面的初始化
        myListAdapter=new MyListAdapter();
        ListView listView=(ListView)contentView.findViewById(R.id.id_listview_msgfragment);
        listView.setAdapter(myListAdapter);
        return contentView;

    }

    /////////////////////该有的数据
    public class Con
    {
        public String content;
        public Con(String content)
        {
            this.content=content;
        }
    }
/////////////////////适配器
    public class MyListAdapter extends BaseAdapter
    {

        @Override
        public int getCount() {
            return listData.size();
        }

        @Override
        public Object getItem(int position) {
            return listData.get(position);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

        @Override
        public View getView(int position, View converView, ViewGroup parent) {

            if(converView==null)
            {
                converView=getLayoutInflater().inflate(R.layout.layout_fragment_msg,parent,false);
            }
            Con c= (Con) getItem(position);
            TextView textView=(TextView)converView.findViewById(R.id.id_textview_msgfragment);
            textView.setText(c.content);

            return converView;
        }
    }

}