Android为什么偏爱静态类

不只是Android开发人员…

非静态内部类始终保留对封闭对象的隐式引用。如果您不需要该参考，则只需花费成本即可。考虑一下：

class Outer {    class NonStaticInner {}    static class StaticInner {}    public List<Object> foo(){         return Arrays.asList( new NonStaticInner(), new StaticInner());     }}

编译时，您将得到如下内容：

class Outer {    Outer(){}    public List<Object> foo(){         return Arrays.asList( new Outer$NonStaticInner(this), new StaticInner());     }}class Outer$NonStaticInner {    private final Outer this$0;    Outer$NonStaticInner(Outer enclosing) { this$0 = enclosing; }}class Outer$StaticInner {    Outer$StaticInner(){}}