Android：使用SharedPreferences保存和恢复'；用户首选项'；值

Posted 2021-02-25

SharedPreferences prefs = getApplicationContext().getSharedPreferences("YourAppName", 0);
// YourAppName is just a string to identify the prefs. 0 means other apps can't see your prefs.
prefs.getString("lastUrl", ""); // get out a string called 'lastUrl'. "" is the return value if the preference doesn't exist
 
// To change values you need an 'Editor'
Editor edit = prefs.edit();
edit.putString("lastUrl", "http://www.example.com" ); // save the value..
 
// could make multiple changes here.
if (!edit.commit()) {
   Log.e("FOO", "Failed to save prefs");
}