package com.xdw.a122.data;import android.content.SharedPreferences;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.EditText;import android.widget.TextView;import com.xdw.a122.R;public class SharedPreferencesActivity extends AppCompatActivity { private EditText mEtName; private Button mBtnSave,mBtnShow; private TextView mTvContent; private SharedPreferences mSharedPreferences; private SharedPreferences.Editor mEditor; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_shared_preferences); mEtName=findViewById(R.id.et_name); mBtnSave=findViewById(R.id.btn_save); mBtnShow=findViewById(R.id.btn_show); mTvContent=findViewById(R.id.tv_show); mSharedPreferences=getSharedPreferences("data",MODE_PRIVATE); //名称和类型 mEditor=mSharedPreferences.edit(); mBtnSave.setOnClickListener(new View.OnClickListener() { //存储 @Override public void onClick(View v) { mEditor.putString("name",mEtName.getText().toString()); //此处写要提交的内容 mEditor.apply(); //or commit()； 存储完成 } }); mBtnShow.setOnClickListener(new View.OnClickListener() { //读取 @Override public void onClick(View v) { mTvContent.setText(mSharedPreferences.getString("name","")); } }); }}

<?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" android:orientation="vertical" tools:context=".data.SharedPreferencesActivity"> <EditText android:id="@+id/et_name" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="输入内容" /> <Button android:id="@+id/btn_save" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="保存" android:layout_marginTop="10dp"/> <Button android:id="@+id/btn_show" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="显示"/> <TextView android:id="@+id/tv_show" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="10dp"/></LinearLayout>

mSharedPreferences=getSharedPreferences("data",MODE_PRIVATE); //名称和类型 mEditor=mSharedPreferences.edit();