Android LIstView简单实现

MainActivity

package com.example.listview;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.os.Bundle;
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;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private ListView myListview;

    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        myListview = (ListView) findViewById(R.id.main_listView);

        List<String> names=new ArrayList<>();

        for (int i = 0; i < 100; i++) {
            names.add("学习天数 "+i);
        }

        myListview.setAdapter(new MyListView(names));

    }


    public class MyListView extends BaseAdapter{

        private List<String> names;

        public MyListView(List<String> names){
            this.names=names;
        }

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

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

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            LayoutInflater layoutInflater =(LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.activity_text,null);
            TextView textView=convertView.findViewById(R.id.text_name);
            textView.setText(names.get(position));

            return convertView;
        }
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ListView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:id="@+id/main_listView"
        />


</LinearLayout>

activity_text.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:text="@string/app_name"
        android:id="@+id/text_name"
        />


</LinearLayout>