SharedPreferences類是一個輕量級的存儲類,特別適合用於保存軟件配置參數。使用SharedPreferences保存數據,其背後是用xml文件存放數據,文件存放在/data/data/<package
name>/shared_prefs目錄下。
1.創建SharedPreferences對象:
<pre name="code" class="java">SharedPreferences dataBase = getSharedPreferences( "SharedPreferences", Activity.MODE_PRIVATE);
2.保存數據:
dataBase.edit().putString("NAME", userName.getText().toString()) ;
dataBase.edit().putString("PASS", password.getText().toString())
dataBase.edit().commit();
String name = dataBase.getString("NAME", "");
String pass = dataBase.getString("PASS", "");
Toast.makeText(this, "讀取數據如下:"+"\n"+"name:" + name + "\n" + "pass:" + pass, Toast.LENGTH_LONG).show();
4.刪除數據:
dataBase.edit().clear().commit();