sp存储

 public void bt_1(View v){
        //1_得到SharedPreferences对象
       SharedPreferences sharedPreferences = getSharedPreferences("abc", MODE_PRIVATE);

        //2-得到编辑器
        SharedPreferences.Editor e=sharedPreferences.edit();

        //3-使用editor添加数据
        e.putString("a","abc");
        e.putString("b", "abc");
        e.putLong("zz",1000);
        e.clear();
        e.remove("a");

        //4-提交保存
        e.commit();
        Toast.makeText(MainActivity.this, "保存成功", Toast.LENGTH_SHORT).show();
    }
    public void bt_2(View v){
        SharedPreferences ss=getSharedPreferences("b",MODE_PRIVATE);
        String s=ss.getString("c", "默认值");
        Toast.makeText(MainActivity.this, "s", Toast.LENGTH_SHORT).show();
    }