2019独角兽企业重金招聘Python工程师标准>>> 
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(MainActivity.this);
SharedPreferences pref = getSharedPreferences("myPref",MODE_PRIVATE);//MODE_PRIVATE -- 只能本app访问
SharedPreferences.Editor editor = pref.edit();
//存值
editor.putString("name","张三".trim());
editor.putInt("age",30);
editor.putLong("time", System.currentTimeMillis());
editor.putBoolean("default",true);
editor.commit();//保存
//修改
editor.remove("default");
editor.commit();//每次操作需要再次保存
//查询
String name = pref.getString("name","");
Integer age = pref.getInt("age",0);//要赋默认值
// ps:
// 字符串+trim() 去掉空格
}
}