SharedPreferences spf = getSharedPreferences("data",Context.MODE_PRIVATE);

SharedPreferences spf = getPreferences(MODE_PRIVATE);

SharedPreferences spf = PreferenceManager.getDefaultSharedPreferences(this);

SharedPreference.Editor editor = spf.edit();

editor.putInt("age",22);
editor.putString("name","Visen");
editor.putBoolean("singleDog",false)

editor.commit();

<?xml version="1.0" encoding="utf-8"?>
<TableLayout xmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:background="@color/black"android:stretchColumns="1"><LinearLayoutandroid:layout_height="wrap_content" android:background="@color/black" android:orientation="vertical"> <ImageView android:layout_width="match_parent" android:layout_height="240dp" android:src="@drawable/image1"/> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:text="@string/title" android:textSize="40sp" android:textColor="@color/red" android:gravity="center" android:background="@color/cyan"/> </LinearLayout> <TableRow android:layout_marginTop="30dp"> <TextView android:layout_height="wrap_content" android:text="@string/account" android:textSize="30sp" android:textColor="@color/white"/> <EditText android:id="@+id/account" android:layout_height="wrap_content" android:inputType="text" android:textSize="20sp" android:textColor="@color/red" android:gravity="center" android:singleLine="true"/> </TableRow> <TableRow> <TextView android:layout_height="wrap_content" android:text="@string/password" android:textSize="30sp" android:textColor="@color/white"/> <EditText android:id="@+id/passWord" android:layout_height="wrap_content" android:inputType="textPassword" android:textSize="20sp" android:textColor="@color/red" android:gravity="center" /> </TableRow> <TableLayout android:layout_height="wrap_content" android:stretchColumns="0"> <TableRow> <CheckBox android:id="@+id/saveSelect" android:background="@color/red" android:layout_gravity="end"/> <TextView android:layout_height="wrap_content" android:text="@string/saveSelect" android:textSize="20sp" android:textColor="@color/white" android:gravity="center" android:layout_gravity="bottom"/> </TableRow> <TableRow> <Button android:layout_height="wrap_content" android:id="@+id/login" android:gravity="center" android:layout_span="2" android:text="@string/login" android:textSize="25sp" android:textColor="@color/red" android:background="@drawable/black_bt"/> </TableRow> </TableLayout> </TableLayout>

public class Login extends AppCompatActivity {private SharedPreferences spf; private SharedPreferences.Editor spfe; private int num = 0; private EditText account = null; private EditText passWord = null; private CheckBox saveSelect = null; private Button login = null ; @Override protected void onCreate(Bundle saveInstanceState){ //加载布局 super.onCreate(saveInstanceState); setContentView(R.layout.login); //初始化控件 account = (EditText)findViewById(R.id.account); passWord = (EditText)findViewById(R.id.passWord); saveSelect = (CheckBox)findViewById(R.id.saveSelect); login = (Button)findViewById(R.id.login); //使用Context的getSharedPreferences(String name,int mode)方法得到SharedPreferences对象; spf = getSharedPreferences("data", Context.MODE_PRIVATE); //使用SharedPreferences对象的edit()方法得到 SharedPreferences.Editor 的对象; spfe = spf.edit(); //复选框是否被选中,若为选中状态，则保存过账户，要恢复数据 if(spf.getBoolean("isSelect",false)){//选中标志,默认值为false String acc = spf.getString("account",""); String pas = spf.getString("passWord",""); account.setText(acc); passWord.setText(pas); saveSelect.setChecked(true); } //设置登录按钮监听事件 login.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { //确认帐号密码 if(account.getText().toString().equals("visen") && passWord.getText().toString().equals("dsy402645063!")){ //复选框是否被勾选，若被勾选，则需要保存账户后登录；否则直接登录且不保存账户 if(saveSelect.isChecked()){ saveDate(); }else { spfe.clear(); spfe.commit(); } //页面跳转 Intent intent = new Intent(Login.this,MainActivity.class); startActivity(intent); finish(); }else {//账户或密码错误 Toast.makeText(Login.this, "account or password is invalid", Toast.LENGTH_SHORT).show(); } } }); } public void saveDate(){ //读取EditText中的内容 String acc = account.getText().toString(); String pas = passWord.getText().toString(); //保存数据 spfe.putString("account",acc); spfe.putString("passWord",pas); spfe.putBoolean("isSelect",true); //提交  spfe.commit(); } @Override public void onBackPressed(){ num++; if(num == 2){ super.onBackPressed(); }else{ Toast.makeText(Login.this, "再按一次退出程序", Toast.LENGTH_SHORT).show(); } } }

String name = editor.getString("name"," ");