android - setOnQueryTextFocusChangeListener 与 setOnFocusChangeListener

Question

android SearchView 有两个方法:setOnQueryTextFocusChangeListener 和setOnFocusChangeListener。它们可以互换吗？它们有什么区别？

Answer 1

1."setOnFocusChangeListener"(继承自android.view.View)针对整个 View 。
2."setOnQueryTextFocusChangeListener"仅适用于 AutoCompleteTextView。

查看SearchView的代码:

public void setOnQueryTextFocusChangeListener(OnFocusChangeListener listener) {
    mOnQueryTextFocusChangeListener = listener;
}

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mQueryTextView = (SearchAutoComplete) findViewById(R.id.search_src_text);

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mQueryTextView.setOnFocusChangeListener(new OnFocusChangeListener() {
        public void onFocusChange(View v, boolean hasFocus) {
            if (mOnQueryTextFocusChangeListener != null) {
                mOnQueryTextFocusChangeListener.onFocusChange(SearchView.this, hasFocus);
            }
        }
    });