现在我想要的是,当单击SearchView时(因此它获得焦点,并且用户在那里键入),已经显示的片段(包含搜索结果)应该变暗/模糊.

所以我尝试在Fragment的onActivityCreated生命周期回调方法中为SearchView设置OnFocusChangedListener,但似乎根本没有调用它.

final Activity myActivity = getActivity();
        Log.i(TAG,"myActivity>"+myActivity.toString());//check
        SearchView mySearchView = (SearchView) myActivity.findViewById(R.id.searchActivity_searchView);
        Log.i(TAG,"mySearchView>"+mySearchView.toString());//check
        mySearchView.setOnFocusChangeListener(new OnFocusChangeListener() {
            @SuppressLint("NewApi")
            @Override
            public void onFocusChange(View v,boolean hasFocus) {
                Log.i(TAG,"onFocusChange OF OnFocusChangeListener IN SearchResultsFragment CALLED.");
                if (hasFocus) {
                    myActivity.getWindow().setDimAmount(1.0f);
                }
            }
        });

我错过了什么吗？我应该怎么做才能在用户点击时调用onFocusChanged,从而激活SearchView在其中键入搜索查询？

注意：如果需要完整的SSCCE代码,请在评论中提问,我会发布.