完成（）和ActivityName.this.finish（）之间的区别是什么？ [英] What is the difference between finish() and ActivityName.this.finish()?

问题描述

有间任何区别完成（）和 ActivityName.this.finish（）？如果我们有名字的活动 SampleActivity ，我们可以通过调用完成它完成（）和 SampleActivity.this.finish（）。有什么区别？

Is there any difference between finish() and ActivityName.this.finish()? If we have activity with name SampleActivity, we can finish it by calling finish() and by SampleActivity.this.finish(). What is the difference?

推荐答案

在大多数情况下是同样的，除非你是一个内部类中。

Most of the time it's the same except if you are inside an inner class.

在这种情况下，第二符号用于消除歧义调用含有活性的方法。

In that case the second notation is used to disambiguate calls to the containing activity's methods.

例如：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    finish(); // the activity's finish()

    new Runnable() {

        private void finish() {
            ...
        }

        @Override
        public void run() {
            SampleActivity.this.finish(); // the activity's finish()
            finish(); // the runnable's finish()
        }
    };

    new Runnable() {

        @Override
        public void run() {
            SampleActivity.this.finish(); // the activity's finish()
            finish(); // the activity's finish() (because the inner class doesn't hide it
        }
    };
}

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