的Android Handler的FIND_POTENTIAL_LEAKS

Question

在Handler.java的源代碼，我過下面的代碼段

public Handler(Callback callback, boolean async) { 
    if (FIND_POTENTIAL_LEAKS) { 
     final Class<? extends Handler> klass = getClass(); 
     if ((klass.isAnonymousClass() || klass.isMemberClass() || klass.isLocalClass()) && 
       (klass.getModifiers() & Modifier.STATIC) == 0) { 
      Log.w(TAG, "The following Handler class should be static or leaks might occur: " + 
       klass.getCanonicalName()); 
     } 
    } 

} 

從代碼中，我可以看到FIND_POTENTIAL_LEAKS是用來尋找潛在leaks.However的申請是private始終false。

那麼什麼時候才能真正使用？

編輯

從穆拉特，反射似乎工作，但爲什麼Android設置的值默認true？

Answer 1

有一個在文檔該字段的評論：我想這是得到通過反射設置爲true例如

public class Handler { 
65  /* 
66  * Set this flag to true to detect anonymous, local or member classes 
67  * that extend this Handler class and that are not static. These kind 
68  * of classes can potentially create leaks. 
69  */ 
70  private static final boolean FIND_POTENTIAL_LEAKS = false; 

這裏描述的Change private static final field using Java reflection