我的XML布局如下所示：

[....textedit....][addbutton]

=======list1=========

=======list2=========

=======list3=========

=======list4=========

如果我想加载和显示从共享首选项创建的列表，能够添加“项目”到列表，并保存到共享首选项，该怎么办？欢迎任何额外的简单初学者解释，因为我是一个完全的新手。
我下面的代码是一个大混乱，我得到了它100%从缝合从一个例子到另一个例子，我从任何地方。

package com.mycompany.myapp;

import android.app.*;
import android.os.*;
import android.widget.EditText;
import android.widget.Button;
import android.widget.ListView;
import android.widget.ListAdapter;
import android.widget.ArrayAdapter;
import android.widget.AdapterView;
import android.widget.Toast;
import android.view.View;
import android.content.SharedPreferences;
import android.content.Context;

public class MainActivity extends Activity {
    String FileName = "myFile";
    Button BtnSave;
    EditText editName;
    ListView lv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        BtnSave = findViewById(R.id.btn1);
        BtnSave.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    saveFile();
                }
            });

        lv = (ListView) findViewById(R.id.list1);
        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,empty);
        lv.setAdapter(adapter);
        //Setting onClickListener on ListView
        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                @Override
                public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                    Toast.makeText(getApplicationContext(),"Item Clicked: "+i,Toast.LENGTH_SHORT).show();
                }
            });
        editName =  findViewById(R.id.edit1);
    }

    private void saveFile() {
        String strName = editName.getText().toString();
        SharedPreferences sharedPref = getSharedPreferences(FileName,Context.MODE_PRIVATE);
        SharedPreferences.Editor editor = sharedPref.edit();
        editor.putString("name", strName);
        editor.commit();
        Toast.makeText(this,"Data Saved Successfully",Toast.LENGTH_SHORT).show();
    }

}