如何微调保存为共享preference？ [英] How to save Spinner as Shared Preference?
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＆LT;＆GT;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＆LT;＆GT;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（dailyCalorieIntake）;
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（dailyCalorieIntake）;
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();
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