从背景返回后，Skobbler Map崩溃(Skobbler Map crashes after returning from background)

 感谢SylviA，当我检查我的示例应用程序时，我试图修复Null Pointer Exception的问题并通过电子邮件发送。 
 
 当我第二次编写代码时，我意识到我做错了，这就是这次荒谬崩溃的原因。 
 
 在MapActivity.class初始化map时，我在代码中发布了一个部分。 这些更改是在DemoUtils.class 
 
/**
 * Initializes the SKMaps framework
 */
public static void initializeLibrary(final Context context) {
    final DemoApplication app = (DemoApplication)context.getApplicationContext();
    // get object holding map initialization settings
    SKMapsInitSettings initMapSettings = new SKMapsInitSettings();
    // set path to map resources and initial map style

    SharedPreferences mSharedPreferences = context.getSharedPreferences("map",0);
    if(app.getMapResourcesDirPath()==null) { // here happens the first error
        Toast.makeText(context,"Null Exception Error avoided", Toast.LENGTH_SHORT).show();
        app.setMapResourcesDirPath(mSharedPreferences.getString("map_path",null));
    }else {
        SharedPreferences.Editor mEditor = mSharedPreferences.edit();
        mEditor.putString("map_path",app.getMapResourcesDirPath());
        mEditor.commit();
    }

    initMapSettings.setMapResourcesPaths(app.getMapResourcesDirPath(),
            new SKMapViewStyle(app.getMapResourcesDirPath() + "daystyle/", "daystyle.json"));
 
 我做错了就是在这一行，它是这样的： 
 
initMapSettings.setMapResourcesPaths(app.getMapResourcesDirPath(),
            new SKMapViewStyle( null + "daystyle/", "daystyle.json"));
 
 它必须这样做： 
 
initMapSettings.setMapResourcesPaths(app.getMapResourcesDirPath(),
            new SKMapViewStyle( app.getMapResourcesDirPath() + "daystyle/", "daystyle.json"));
 
 谢谢你的时间 ：） 

Thanks to SylviA while I was checking my sample app I was trying to fix the problem of Null Pointer Exception and send it via email. 
 
While I was writing the code for the second time I realized that I was doing something wrong and that was the reason of this absurd crash.
 
Here I am posting a part from the code where I have made my changes when map is initialized in MapActivity.class. These changes are made inside DemoUtils.class
 
/**
 * Initializes the SKMaps framework
 */
public static void initializeLibrary(final Context context) {
    final DemoApplication app = (DemoApplication)context.getApplicationContext();
    // get object holding map initialization settings
    SKMapsInitSettings initMapSettings = new SKMapsInitSettings();
    // set path to map resources and initial map style

    SharedPreferences mSharedPreferences = context.getSharedPreferences("map",0);
    if(app.getMapResourcesDirPath()==null) { // here happens the first error
        Toast.makeText(context,"Null Exception Error avoided", Toast.LENGTH_SHORT).show();
        app.setMapResourcesDirPath(mSharedPreferences.getString("map_path",null));
    }else {
        SharedPreferences.Editor mEditor = mSharedPreferences.edit();
        mEditor.putString("map_path",app.getMapResourcesDirPath());
        mEditor.commit();
    }

    initMapSettings.setMapResourcesPaths(app.getMapResourcesDirPath(),
            new SKMapViewStyle(app.getMapResourcesDirPath() + "daystyle/", "daystyle.json"));
 
What I was doing wrong was at this line, and it was something like this:
 
initMapSettings.setMapResourcesPaths(app.getMapResourcesDirPath(),
            new SKMapViewStyle( null + "daystyle/", "daystyle.json"));
 
And it has to be done like this:
 
initMapSettings.setMapResourcesPaths(app.getMapResourcesDirPath(),
            new SKMapViewStyle( app.getMapResourcesDirPath() + "daystyle/", "daystyle.json"));
 
Thanks for your time :)