ListView基本写法

package com.example.pengtuanyuan.strangelistview;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        ListView lv_Strange =(ListView)findViewById(R.id.lv_Strange);
        //lv_Strange.setAdapter(new StrangeAdapter());
        StrangeAdapter listAdapter=new StrangeAdapter();
        lv_Strange.setAdapter(listAdapter);

        }
    class StrangeAdapter extends BaseAdapter{

        @Override
        public int getCount() {
            return 30;
        }

        @Override
        public Object getItem(int position) {
            return null;
        }

        @Override
        public long getItemId(int position) {
            return 0;
        }

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

            TextView view=new TextView(MainActivity.this);
            view.setText("position"+position);
            System.out.println("positions"+position);

            return view;
        }
    }
}