Question

我正在使用DefaultSharedPrefeneces来保存和加载导航抽屉中复选框的状态。

创建导航抽屉并从DefaultPreferences加载复选框的状态时，如果每个复选框的布尔值为true，则复选框设置为选中。

当用户点击复选框时，状态会被保存到defaultsharedPrefences。我对这一切都没有问题。

问题是，然后我尝试在提交之前将2个布尔值放入defaultsharedprefences，它不起作用并且似乎覆盖了第一个布尔值。

这是我的代码

//Navigation Drawer
private void addDrawerItems() {


    String[] osArray = {"item1", "item2", "item3"};

    mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice, osArray);


    if (mIsPremiumUser) {
        mDrawerList.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);
    } else {
        mDrawerList.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
    }

    mDrawerList.setAdapter(mAdapter);


    Boolean isCheckedValue;


    // *** THIS IS WHERE I LOAD THE CHECKBOX STATE FROM DEFAULTSHAREDPREFERENCES ***
    SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(this);
    isCheckedValue = preferences.getBoolean("cbox1", false);
    mDrawerList.setItemChecked(0, isCheckedValue);

    isCheckedValue = preferences.getBoolean("cbox2", true);
    mDrawerList.setItemChecked(1, isCheckedValue);

    isCheckedValue = preferences.getBoolean("cbox3", true);
    mDrawerList.setItemChecked(2, isCheckedValue);



    mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            CheckedTextView ctv = (CheckedTextView) view;

            if (!mIsPremiumUser) {
                Toast.makeText(getApplication(), "Upgrade", Toast.LENGTH_LONG).show();
                return;
            }


            switch (position) {

                case 0:


                    if (ctv.isChecked()) {

                        requestActivityUpdates();
                        Toast.makeText(getApplicationContext(), "item1ON", Toast.LENGTH_SHORT).show();

                        // THIS IS WHERE I SAVE THE STATE OF THE CHECKBOX IN DEFAULT SHAREDPREFENCES
                        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
                        SharedPreferences.Editor editor = preferences.edit();

                        editor.putBoolean("cbox1", ctv.isChecked());
                        editor.commit();


                    } else {

                        removeActivityUpdates();
                        Toast.makeText(getApplicationContext(), "item1OFF", Toast.LENGTH_SHORT).show();


                        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
                        SharedPreferences.Editor editor = preferences.edit();

                        editor.putBoolean("cbox1", false);
                        editor.commit();


                    }

                    break;

                case 1:
                    if (ctv.isChecked()) {

                        Toast.makeText(getApplicationContext(), "item2 ON", Toast.LENGTH_LONG).show();


                        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
                        SharedPreferences.Editor editor = preferences.edit();

                        // THIS IS WHERE I SAVE THE STATE OF THE CHECKBOX IN DEFAULT SHAREDPREFENCES
                        editor.putBoolean("cbox2", ctv.isChecked());
                        editor.putBoolean("callStatus", ctv.isChecked()); // << THIS LINE IS CAUSING ME PROBLEMS 
                        editor.commit();


                    } else {

                        Toast.makeText(getApplicationContext(), "item2 OFF", Toast.LENGTH_LONG).show();


                        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
                        SharedPreferences.Editor editor = preferences.edit();

                        editor.putBoolean("cbox2", ctv.isChecked());
                        editor.putBoolean("callStatus", ctv.isChecked());
                        editor.commit();


                    }
                    break;

                case 2:
                    if (ctv.isChecked()) {

                        Toast.makeText(getApplicationContext(), "item3 ON", Toast.LENGTH_LONG).show();


                        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
                        SharedPreferences.Editor editor = preferences.edit();

                        editor.putBoolean("cbox3", ctv.isChecked());
                        editor.putBoolean("smsStatus", ctv.isChecked());
                        editor.commit();


                    } else {

                        Toast.makeText(getApplicationContext(), "item3 OFF", Toast.LENGTH_LONG).show();


                        SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
                        SharedPreferences.Editor editor = preferences.edit();

                        editor.putBoolean("cbox3", ctv.isChecked());
                        editor.putBoolean("smsStatus", ctv.isChecked());
                        editor.commit();

                    }
                    break;

            }


        }
    });
}

我确信它在每个单击的项目上都适用于一个putBoolean，但是当我在editor.com之前在同一个if / else中有两个putBoolean时却没有。关于什么导致问题以及如何解决问题的任何建议？非常感谢它。

Answer 1

我明白了！因为布尔值存储在外部defaultSharedPrefenences文件中，在应用程序之外，值始终从中读入。我最后一次点击复选框就会拉出状态。我在想，每当我强行关闭应用程序时，它都会回到我想要的默认选择状态，这是错误的，真实的，真实的。但由于默认的Sharedpreferences在应用程序未被销毁时会以最新状态加载。

我必须在应用程序管理器中清除应用程序数据，以便将布尔值设置为null，并显示false，true，true。

当放入多个布尔值时，getDefaultSharedPrefereneces为所有布尔值返回false

1 个答案: