使用共享首選項保存微調器選定項目的值

Question

如何保存當前選定的微調器值，以便當我重新打開應用程序時默認會自動選擇保存的值？

我當前的代碼：

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.loginpage); 


    final Spinner spinner = (Spinner) findViewById(R.id.spinner1); 
    ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
     this, R.array.spinner_array, android.R.layout.simple_spinner_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) { 
       SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(getBaseContext()); 
       SharedPreferences.Editor prefEditor = prefs.edit(); 
       prefEditor.putString("savedValue",spinner.getSelectedItem().toString()); 

       String savedValue=spinner.getSelectedItem().toString(); 

       for(int i=0;i<6;i++) 
       if(savedValue.equals(spinner.getItemAtPosition(i).toString())) 
       { 
        spinner.setSelection(i); 
        break; 
       } 
      } 
      @Override 
      public void onNothingSelected(AdapterView<?> parent){} 
    }); 

Answer 1

我想你想要的是，在某些時候，你要顯示你保存的值微調（來自共享偏好）作爲選擇item.For這

與所有的包括已保存的value.Now你想顯示你保存的值作爲selected.Suppose你在適配器

String savedValue=PreferenceManager 
        .getDefaultSharedPreferences(context) 
        .getString("savedValue",""); 

for(int i=0;i<6;i++) 
if(savedValue.equals(spinner.getItemAtPosition(i).toString())){ 
    spinner.setSelection(i); 
    break; 
} 

6項爲默認值

集微調適配器保存在共享偏好微調值做到這一點

SharedPreferences prefs; 
prefs = PreferenceManager.getDefaultSharedPreferences(context); 
SharedPreferences.Editor prefEditor = prefs.edit(); 
prefEditor.putString("savedValue",spinner.getSelectedItem().toString()); 
prefEditor.commit();