Caused by: java.lang.NullPointerException
   09-23 13:17:33.092: E/AndroidRuntime(21302):     at android.content.ContextWrapper.getResources(ContextWrapper.java:80)
   09-23 13:17:33.092: E/AndroidRuntime(21302):     at android.content.Context.getString(Context.java:183)
   09-23 13:17:33.092: E/AndroidRuntime(21302):     at com.akilli.ticaret.Main.<init>(Main.java:25)

您不能将活动用作上下文，直到 onCreate（）。从类初始化中删除 getString（）调用（如< init> 所示）并将其移至 onCreate（）。

You cannot use the activity as a Context until onCreate(). Remove the getString() call from class initialization (as implied by <init>) and move it to onCreate().