写数据：
SharedPreferences.Editor editor = getSharedPreferences("data",MODE_PRIVATE).edit();
editor.putBoolean("iscycle",isChecked);
editor.apply();
SharedPreferences.Editor editor = getSharedPreferences("data",MODE_PRIVATE).edit();
editor.putString("Raw",data_edittext.getText().toString());
editor.apply();
读数据：
SharedPreferences pref = getSharedPreferences("data",MODE_PRIVATE);
String Raw_history=pref.getString("Raw","");
Boolean is_c=pref.getBoolean("iscycle",false);
原文：https://www.cnblogs.com/ksxh/p/14701116.html