AndroidSharedPreference存储文件三步走

val editor = getSharedPreferences("data",Context.MODE_PRIVATE).edit()
editor.putString("name","jack")
editor.apply()

getSharedPreferences("data", Context.MODE_PRIVATE).edit {
    putString("name", "Tom")
    putInt("age", 28)
    putBoolean("married", false)
}

val prefs = getSharedPreferences("data", Context.MODE_PRIVATE)
val name = prefs.getString("name", "")
val age = prefs.getInt("age", 0)
val married = prefs.getBoolean("married", false)
Log.d("MainActivity", "name is $name")
Log.d("MainActivity", "age is $age")
Log.d("MainActivity", "married is $married")

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:Android="Http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >
    <Button
        android:id="@+id/saveButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Save Data"
        />
    <Button
        android:id="@+id/restoreButton"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Restore Data"
        />
</LinearLayout>

package com.zhiyiyi.listviewdemo
import android.content.Context
import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle
import android.util.Log
import android.widget.Toast
import androidx.core.content.edit
import Kotlinx.android.synthetic.main.activity_main.*
import java.io.*
class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        saveButton.setOnClickListener {
            getSharedPreferences("data", Context.MODE_PRIVATE).edit {
                putString("name", "Tom")
                putInt("age", 28)
                putBoolean("married", false)
            }
        }
        restoreButton.setOnClickListener {
            val prefs = getSharedPreferences("data", Context.MODE_PRIVATE)
            val name = prefs.getString("name", "")
            val age = prefs.getInt("age", 0)
            val married = prefs.getBoolean("married", false)
            Log.d("MainActivity", "name is $name")
            Log.d("MainActivity", "age is $age")
            Log.d("MainActivity", "married is $married")
        }
    }
}