本文介绍了如何微调保存为共享preference?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我已经能够整数和字符串保存为共享preferences但搜查,似乎无法能够选择的值保存纱厂为共享preference?

  =微调(微调)findViewById(R.id.spnCalorieRange);
        适配器= ArrayAdapter.createFromResource(这一点,R.array.Calorie_Range,android.R.layout.simple_spinner_dropdown_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(适配器);        spinner.setOnItemSelectedListener(新AdapterView.OnItemSelectedListener(){            @覆盖
            公共无效onItemSelected(适配器视图<>母公司,观景,
                    INT位置,长的id){
                长项= parent.getItemIdAtPosition(位置);
                。字符串POS = spinner.getSelectedItem()的toString();
                //shared$p$pferences.edit().putInt(\"$p$pF_SPINNER位置).commit();
                如果(项目== 0){
                    deficitPercentage = 0.05;
                }
                否则如果(项目== 1)
                {
                    deficitPercentage = 0.1;
                }
                否则如果(项目== 2)
                {
                    deficitPercentage = 0.15;
                }
                否则,如果(项目== 3)
                {
                    deficitPercentage = 0.2;
                }
                否则,如果(项目== 4)
                {
                    deficitPercentage = 0.25;
                }
                其他
                {
                    deficitPercentage = 0.3;
                }
                editor.putString(POS,POS机);
                editor.commit();
            }            @覆盖
            公共无效onNothingSelected(适配器视图<>母公司){
                // TODO自动生成方法存根            }        });

在这里访问共享preferences在OnCreate中:

 保护无效的onCreate(捆绑savedInstanceState){
       super.onCreate(savedInstanceState);
       的setContentView(R.layout.activity_diet);
        spnCalorieRange =(微调)findViewById(R.id.spnCalorieRange);        共享preferences = preferenceManager.getDefaultShared preferences(本);
        。共享preferences preF = getApplicationContext()getShared preferences(选项,MODE_PRIVATE);
        编辑= pref.edit();         字符串strAvgCalIntake = Double.toString(da​​ilyCalorieIntake);
         字符串strGoal = Double.toString(目标);        strAvgCalIntake = loadSaved preference(strAvgCalIntake);
        strGoal = loadSaved preference(strGoal);        etAverageCalorieIntake.setText(strAvgCalIntake);
        etLoseWeight.setText(strGoal);        //米preFS = getShared preferences(preFS_NAME,MODE_PRIVATE);
        //spinner.setSelection(m$p$pfs.getInt($p$pF_SPINNER,0));        // INT selectedPosition =共享preferences.getInt(spinnerSelection,0);
        INT selectedPosition = spnCalorieRange.getSelectedItemPosition();
        共享preferences.getInt(spinnerSelection,selectedPosition);
        ((编辑)共享preferences).commit();

下面就是我节省的共享preferences按钮:
字符串是BTW节约罚款。

 按钮btnBack =(按钮)findViewById(R.id.btnBack);
    btnBack.setOnClickListener(新View.OnClickListener(){
            @覆盖
        公共无效的onClick(视图v){                     字符串strAvgCalIntake = Double.toString(da​​ilyCalorieIntake);
                    字符串strGoal = loadSaved preference(strGoal);
                spnCalorieRange =(微调)findViewById(R.id.spnCalorieRange);                    。strAvgCalIntake = etAverageCalorieIntake.getText()的toString();
                    节省preference(strAvgCalIntake,strAvgCalIntake);                。strGoal = etLoseWeight.getText()的toString();
                节省preference(strGoal,strGoal);                    共享preferences US preF = getShared preferences(preF,Activity.MODE_PRIVATE);
                    共享preferences.Editor编辑= S pref.edit();
                editor.putString(deficitPercentage_key,Double.toString(deficitPercentage)); //
                    editor.commit();


解决方案

如果您已经验证了 deficitPercentage 值,(我希望你做了)

 共享preferences US preF = getShared preferences(your_ prefs_name,Activity.MODE_PRIVATE);
共享preferences.Editor编辑= S pref.edit();
editor.putString(deficitPercentage_key,Double.toString(deficitPercentage)); //
editor.commit();

I have been able to save Integers and Strings as Shared Preferences but have searched and cannot seem to be able to save a Spinners selected value as a shared preference?

        spinner = (Spinner)findViewById(R.id.spnCalorieRange); 
        adapter = ArrayAdapter.createFromResource(this, R.array.Calorie_Range, android.R.layout.simple_spinner_dropdown_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);

        spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parent, View view,
                    int position, long id) {
                long item = parent.getItemIdAtPosition(position);
                String pos =spinner.getSelectedItem().toString();
                //sharedPreferences.edit().putInt("PREF_SPINNER", position).commit();
                if (item == 0){
                    deficitPercentage = .05;
                }
                else if (item ==1)
                {
                    deficitPercentage = .1;
                }
                else if (item ==2)
                {
                    deficitPercentage = .15;    
                }
                else if (item ==3)
                {
                    deficitPercentage = .2;
                }
                else if (item ==4)
                {
                    deficitPercentage = .25;
                }
                else
                {
                    deficitPercentage = .3;
                }
                editor.putString("pos", pos);
                editor.commit();
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
                // TODO Auto-generated method stub

            }

        });

Accessing Shared Preferences here in OnCreate:

       protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_diet);


        spnCalorieRange = (Spinner) findViewById(R.id.spnCalorieRange);

        sharedPreferences =  PreferenceManager.getDefaultSharedPreferences(this);
        SharedPreferences pref = getApplicationContext().getSharedPreferences("Options", MODE_PRIVATE);
        editor=pref.edit();

         String strAvgCalIntake = Double.toString(dailyCalorieIntake);
         String strGoal = Double.toString(goal);

        strAvgCalIntake = loadSavedPreference("strAvgCalIntake");
        strGoal = loadSavedPreference("strGoal");

        etAverageCalorieIntake.setText(strAvgCalIntake);
        etLoseWeight.setText(strGoal);

        //mPrefs = getSharedPreferences(PREFS_NAME, MODE_PRIVATE);
        //spinner.setSelection(mPrefs.getInt(PREF_SPINNER, 0));

        // int selectedPosition = sharedpreferences.getInt("spinnerSelection", 0);


        int selectedPosition = spnCalorieRange.getSelectedItemPosition();
        sharedPreferences.getInt("spinnerSelection", selectedPosition);
        ((Editor) sharedPreferences).commit();

Here is the Button where I'm saving the shared Preferences:The Strings are saving fine btw.

  Button btnBack = (Button)findViewById(R.id.btnBack);
    btnBack.setOnClickListener(new View.OnClickListener() {
            @Override
        public void onClick(View v) {

                     String strAvgCalIntake =       Double.toString(dailyCalorieIntake);
                    String strGoal = loadSavedPreference("strGoal");
                spnCalorieRange = (Spinner) findViewById(R.id.spnCalorieRange);

                    strAvgCalIntake = etAverageCalorieIntake.getText().toString();
                    savePreference("strAvgCalIntake",strAvgCalIntake);

                strGoal = etLoseWeight.getText().toString();
                savePreference("strGoal",strGoal);

                    SharedPreferences spref = getSharedPreferences("pref", Activity.MODE_PRIVATE);
                    SharedPreferences.Editor editor = spref.edit();
                editor.putString("deficitPercentage_key", Double.toString(deficitPercentage)); //
                    editor.commit();
解决方案

If you have validated the deficitPercentage value, (and I hope you did)

SharedPreferences spref = getSharedPreferences("your_prefs_name", Activity.MODE_PRIVATE);
SharedPreferences.Editor editor = spref.edit();
editor.putString("deficitPercentage_key", Double.toString(deficitPercentage)); //
editor.commit();

这篇关于如何微调保存为共享preference?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

09-27 10:58