Android学习之SharedPerference存储详解

package com.example.sharedpreferences;

import android.content.SharedPreferences;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

  private Button button;
  private Button restore_btn;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    button = (Button)findViewById(R.id.save_data);
    button.setOnClickListener(this);
    restore_btn = (Button)findViewById(R.id.restore_data);
    restore_btn.setOnClickListener(this);
  }

  @Override
  public void onClick(View view) {
    switch (view.getId()){
      case R.id.save_data:
        saveData();
        Toast.makeText(MainActivity.this,"保存成功！",Toast.LENGTH_SHORT).show();
        break;
      case R.id.restore_data:
        restorData();
        Toast.makeText(MainActivity.this,"恢复成功",Toast.LENGTH_SHORT).show();
        break;
      default:
        break;
    }
  }
  public void saveData(){
    SharedPreferences.Editor editor = getSharedPreferences("data",MODE_PRIVATE).edit();
    editor.putString("name","Tom");
    editor.putInt("age",18);
    editor.putBoolean("married",false);
    editor.apply();
  }
  public void restorData(){
    SharedPreferences preferences = getSharedPreferences("data",MODE_PRIVATE);
    String name = preferences.getString("name","");
    int age = preferences.getInt("age",0);
    boolean married = preferences.getBoolean("marred",false);
    Log.d("主活动: ","获取到名字: "+name);
    Log.d("主活动: ","获取到年龄: "+age);
    Log.d("主活动: ","获取到婚配: "+married);
  }
}

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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="com.example.sharedpreferences.MainActivity">

  <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical">
    <Button
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:id="@+id/save_data"
      android:text="保存数据"/>
    <Button
      android:layout_width="match_parent"
      android:layout_height="wrap_content"
      android:id="@+id/restore_data"
      android:text="恢复数据"/>
  </LinearLayout>

</android.support.constraint.ConstraintLayout>