Android 的永久登陸 與登出登陸

來源:互聯網
上載者:User

標籤:

一、永久登陸

  sharedprefrence 儲存 userID  以及 password

    private String FILE = "saveUserNamePwd";//用於儲存SharedPreferences的檔案
    private SharedPreferences sp = null;//聲明一個SharedPreferences

    sp = getSharedPreferences(FILE, MODE_PRIVATE);//初始化sharedprefrences

    protected void initData() {
      name = sp.getString("name", "");
      password = sp.getString("password", "");
      nameET.setText(name);
      passwordET.setText(password);
      Editor editor = sp.edit();
      editor.putString("name", nameET.getText().toString());
      editor.putString("password", passwordET.getText().toString());
      editor.commit();
    }

  下面寫在登入的點擊事件裡面:

    

    if(sp == null){
      sp = getSharedPreferences(FILE, MODE_PRIVATE);
    }
    Editor edit = sp.edit();
    edit.putString("name", nameET.getText().toString());
    edit.putString("password", passwordET.getText().toString());
    edit.commit();

二、登出登入

  1、清空sharedpreferences中的資料

      private SharedPreferences sp;

      public void clearnuserinfo() {

        sp = getSharedPreferences("saveUserNamePwd",MODE_PRIVATE);
        sp.edit().clear().commit();
      }

  2、清空任務棧(TaskStack)

    Intent logoutIntent = new Intent(SettingHomeActivity.this, LoginActivity.class);
    logoutIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_NEW_TASK);
    startActivity(logoutIntent);

至此  全部OK!

Android 的永久登陸 與登出登陸

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