微調位置和sharedpreferences

我有一個簡單的TextView，這是編輯在一個配置活動的edittextfield，用旋轉器，用戶可以更改TEXTSIZE，我需要保存一個紡紗廠選擇，並與sharedpreferences再次還原appwidget ，我需要appwidgetid，所以用戶可以添加多個appwidget。微調位置和sharedpreferences

我已經嘗試了很多事情，做研究，現在2天，但我無法得到它的工作，我得到強制關閉，一旦被添加的窗口小部件。

這是我覺得看起來是最好的，但它不工作。 Spinner Selection - Save to SharedPreferences, then Retrieve

這是推動我瘋了！任何sugestions來解決，這將是非常讚賞

祺雅Harteg

保存和加載首選項

// Write the prefix to the SharedPreferences object for this widget 
    static void saveTitlePref(Context context, int appWidgetId, String text) { 

      SharedPreferences.Editor editor = context.getSharedPreferences(PREFS_NAME, 0).edit(); 
     editor.putString(PREF_PREFIX_KEY + appWidgetId, text); 
     spinner.getSelectedItemPosition(); 
     editor.putInt(spinnerSelection + appWidgetId, 0); 
     editor.commit(); 
    } 

    // Read the prefix from the SharedPreferences object for this widget. 
    static String loadTitlePref(Context context, int appWidgetId) { 
     SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, 0); 

      String prefix = prefs.getString(PREF_PREFIX_KEY + appWidgetId, null); 

     spinner.setSelection(prefs.getInt(spinnerSelection + appWidgetId, 0)); 

     // If there is no preference saved, get the default from a resource 
     if (prefix != null) { 
      return prefix; 
     } else { 
      return context.getString(R.string.appwidget_prefix_default); 
     } 
    }

幾乎全碼：

public class WidgetConfig extends Activity implements OnItemSelectedListener{ 

    Dialog myDialog; 
    Context context; 
    static EditText info; 
    static Spinner spinner; 
    private static final String[] paths = { "10", "12", "14", "16", "18", "20", 
     "22", "24", "26", "28", "30", "32", "34", "36", "38", "40", "50", "60"}; 

    File path = null; 
    private static final String PREFS_NAME = "com.harteg.NotesWidgetPro.Widget"; 
    private static final String PREF_PREFIX_KEY = "prefix_"; 
    private final static String FONT_SIZE_KEY="fontsize"; 
    static String spinnerSelection; 

    int mAppWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID; 

    public WidgetConfig() { 
     super(); 
    } 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     // TODO Auto-generated method stub 
     super.onCreate(savedInstanceState); 

     setContentView(R.layout.widgetconfig); 
     context = WidgetConfig.this; 

     // back button = cancel 
     setResult(RESULT_CANCELED); 

     info = (EditText) findViewById(R.id.etwidgetconfig); 

     findViewById(R.id.bwidgetconfig).setOnClickListener(mOnClickListener); 
     findViewById(R.id.bwidgetconfig1).setOnClickListener(mOnClickListener); 

     // Find the widget id from the intent. 
     Intent intent = getIntent(); 
     Bundle extras = intent.getExtras(); 
     if (extras != null) { 
      mAppWidgetId = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID, 
        AppWidgetManager.INVALID_APPWIDGET_ID); 
     } 

     // If they gave us an intent without the widget id, just bail. 
     if (mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) { 
      finish(); 
     } 

     info.setText(loadTitlePref(WidgetConfig.this, mAppWidgetId)); 

     //------------ Text Size spinner --------------- 
     spinner = (Spinner) findViewById(R.id.TxtSizeSP); 

     ArrayAdapter<String> adapter = new ArrayAdapter<String>(WidgetConfig.this, 
       android.R.layout.simple_spinner_item, paths); 

     adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spinner.setAdapter(adapter); 
     spinner.setSelection(7); 
     spinner.setOnItemSelectedListener(this); 

     //-------------------------------------------------- 

    } // onCreate finished 

    public void onItemSelected(AdapterView<?> parent, View v, int position, long id) { 

     RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget); 
     AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context); 

     switch (position) { 
     case 0: 
      info.setTextSize(10.0f); 
      views.setFloat(R.id.tvConfigInput, "setTextSize", 10); 
      break; 
     case 1: 
      info.setTextSize(12.0f); 
      views.setFloat(R.id.tvConfigInput, "setTextSize", 12); 
      break; 

     .... 

     case 17: 
      info.setTextSize(28.0f); 
      views.setFloat(R.id.tvConfigInput, "setTextSize", 60); 
      break; 
     } 
     appWidgetManager.updateAppWidget(mAppWidgetId, views); 
    } 

    public void onNothingSelected(AdapterView<?> arg0) { 

    } 

    View.OnClickListener mOnClickListener = new View.OnClickListener() { 
     public void onClick(View v) { 

      // When the button is clicked, save the string in our prefs and 
      // return that they clicked OK. 
      String titlePrefix = info.getText().toString(); 
      saveTitlePref(context, mAppWidgetId, titlePrefix); 


      // Push widget update to surface with newly set prefix 
      AppWidgetManager appWidgetManager = AppWidgetManager 
        .getInstance(context); 
      Widget.updateAppWidget(context, appWidgetManager, mAppWidgetId, 
        titlePrefix); 

      // Make sure we pass back the original appWidgetId 
      Intent resultValue = new Intent(); 
      resultValue.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, 
        mAppWidgetId); 
      setResult(RESULT_OK, resultValue); 
      finish(); 

     } 
    }; 

    // Write the prefix to the SharedPreferences object for this widget 
    static void saveTitlePref(Context context, int appWidgetId, String text) { 

     //Getting the SharedPreference object 
     SharedPreferences.Editor editor = context.getSharedPreferences(PREFS_NAME, 0).edit(); 

     // save the values to preferences 
     editor.putString(PREF_PREFIX_KEY + appWidgetId, text); 

     spinner.getSelectedItemPosition(); 
     editor.putInt(spinnerSelection + appWidgetId, 0); 


     // Saves the values 
     editor.commit(); 
    } 

    // Read the prefix from the SharedPreferences object for this widget. 
    static String loadTitlePref(Context context, int appWidgetId) { 
     SharedPreferences prefs = context.getSharedPreferences(PREFS_NAME, 0); 
     String prefix = prefs.getString(PREF_PREFIX_KEY + appWidgetId, null); 

     spinner.setSelection(prefs.getInt(spinnerSelection + appWidgetId, 0)); 

     // If there is no preference saved, get the default from a resource 
     if (prefix != null) { 
      return prefix; 
     } else { 
      return context.getString(R.string.appwidget_prefix_default); 
     } 
    } 

    static void deleteTitlePref(Context context, int appWidgetId) { 
    } 

    static void loadAllTitlePrefs(Context context, 
      ArrayList<Integer> appWidgetIds, ArrayList<String> texts) { 
    } 

... 

}

UPDATE：

我添加日誌標籤，如下所示：

Log.v(TAG, "before save"); 
     spinner.getSelectedItemPosition(); 
     editor.putInt(spinnerSelection + appWidgetId, 0); 
     Log.v(TAG, "after save"); 

Log.v(TAG, "before load"); 
     spinner.setSelection(prefs.getInt(spinnerSelection + appWidgetId, 0)); 
     Log.v(TAG, "after load");

，但他們甚至沒有出現在日誌中：

11-16 21:25:08.470: E/AndroidRuntime(1337): FATAL EXCEPTION: main 
11-16 21:25:08.470: E/AndroidRuntime(1337): java.lang.RuntimeException: Unable to start receiver com.harteg.NotesWidgetPro.Widget: java.lang.NullPointerException 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at android.app.ActivityThread.handleReceiver(ActivityThread.java:2236) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at android.app.ActivityThread.access$1500(ActivityThread.java:130) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1271) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at android.os.Handler.dispatchMessage(Handler.java:99) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at android.os.Looper.loop(Looper.java:137) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at android.app.ActivityThread.main(ActivityThread.java:4745) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at java.lang.reflect.Method.invokeNative(Native Method) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at java.lang.reflect.Method.invoke(Method.java:511) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at dalvik.system.NativeStart.main(Native Method) 
11-16 21:25:08.470: E/AndroidRuntime(1337): Caused by: java.lang.NullPointerException 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at com.harteg.NotesWidgetPro.WidgetConfig.loadTitlePref(WidgetConfig.java:267) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at com.harteg.NotesWidgetPro.Widget.onUpdate(Widget.java:32) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at android.appwidget.AppWidgetProvider.onReceive(AppWidgetProvider.java:66) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  at android.app.ActivityThread.handleReceiver(ActivityThread.java:2229) 
11-16 21:25:08.470: E/AndroidRuntime(1337):  ... 10 more

如果我刪除保存和加載位置的插件的線條完美的作品

UPDATE：

我我也試過：

變量：

private final static String PREF_PREFIX_KEY_FONT_SIZE = "prefix_fontsize_";

爲了節省：

editor.putInt(PREF_PREFIX_KEY_FONT_SIZE + appWidgetId, spinner.getSelectedItemPosition());

加載：

prefs.getInt(PREF_PREFIX_KEY_FONT_SIZE + appWidgetId, spinner.getSelectedItemPosition());

給了我同樣的錯誤。請幫助

來源

2012-11-16 Jakob

也發佈LogCat錯誤。而存儲和讀取首選項，看看是否有任何與它的問題 – Sam

日誌appWidgetId ...... –

我updatet的問題，謝謝 – Jakob

我得到它的工作，這是我做的

我修改了微調，以這樣的：

//------------ Text Size spinner --------------- 
     spinner = (Spinner) findViewById(R.id.TxtSizeSP); 


     ArrayAdapter<String> adapter = new ArrayAdapter<String>(WidgetConfig.this, 
       android.R.layout.simple_spinner_item, paths); 

     adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item); 
     spinner.setAdapter(adapter); 

     // Retrieve spinner position from sharedpreferences 
     SharedPreferences sharedPref = getSharedPreferences(PREFS_NAME + mAppWidgetId, MODE_PRIVATE); 
     int spinnerValue = sharedPref.getInt("userChoiceSpinner",-1); 
     if(spinnerValue != -1) 
      // set the value of the spinner 
      spinner.setSelection(spinnerValue); 

     spinner.setOnItemSelectedListener(this);

和我所有的情況下，在我加入onItemSelected（）方法後：

// save inputed spinner position to sharedpreferences 
     int userChoice = spinner.getSelectedItemPosition(); 
     SharedPreferences sharedPref = getSharedPreferences(PREFS_NAME + mAppWidgetId, 0); 
     SharedPreferences.Editor prefEditor = sharedPref.edit(); 
     prefEditor.putInt("userChoiceSpinner", userChoice); 
     prefEditor.commit();

這也可能工作： http://a2zandroidtutorials.blogspot.dk/2012/07/spinner-with-previously-selected-value.html

來源

2012-11-17 16:16:01 Jakob

微調位置和sharedpreferences

回答

相關問題