java - 为 Fragment 中的更多 editTexts 设置 OnFocusChangeListener

Question

我想为我拥有的每个 EditText(在我的例子中是 VerifiedEditText)设置自动滚动。我是这样做的，但我认为这不是应该的方式(看起来太复杂、太乱、太长)，你能推荐我让它更简单吗？我仍在自学，因此非常感谢对附加代码的解释。谢谢

@Override
public void onFocusScroll() {

final ScrollView mScrollView;    
mScrollView = (ScrollView) rootView.findViewById(R.id.register_scroll);

        final VerifiedEditText editText0 = (VerifiedEditText) rootView.findViewById(R.id.register_ticket);
        final VerifiedEditText editText1 = (VerifiedEditText) rootView.findViewById(R.id.register_sektor);
        final VerifiedEditText editText2 = (VerifiedEditText) rootView.findViewById(R.id.register_row);
        final VerifiedEditText editText3 = (VerifiedEditText) rootView.findViewById(R.id.register_seat);

        editText0.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (hasFocus) {
                    mScrollView.post(new Runnable() {
                        public void run() {
                            mScrollView.smoothScrollTo(0, mScrollView.getTop());
                        }
                    });
                }
            }
        });

        editText1.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (hasFocus) {
                    mScrollView.post(new Runnable() {
                        @Override
                        public void run() {
                            mScrollView.smoothScrollTo(0, mScrollView.getBottom());
                        }
                    });
                }
            }
        });

        editText2.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (hasFocus) {
                    mScrollView.post(new Runnable() {
                        @Override
                        public void run() {
                            mScrollView.smoothScrollTo(0, mScrollView.getBottom());
                        }
                    });
                }
            }
        });

        editText3.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (hasFocus) {
                    mScrollView.post(new Runnable() {
                        @Override
                        public void run() {
                            mScrollView.smoothScrollTo(0, mScrollView.getBottom());
                        }
                    });
                }
            }
        });
    }

---

Answer 1

     implement class by `View.OnFocusChangeListener`

并将 Focus Listener 设置为类的当前实例，因为将其视为 View.OnFocusChangeListener 实例并覆盖 onFocusChange() 方法

v.getTop() 返回当前焦点 View 的顶部位置

 editText0.setOnFocusChangeListener(this);
 editText1.setOnFocusChangeListener(this);
 editText2.setOnFocusChangeListener(this);
 editText3.setOnFocusChangeListener(this);




            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                if (hasFocus) {

                    mScrollView.post(new Runnable() {
                        public void run() {
                            mScrollView.smoothScrollTo(0, v.getTop());
                        }
                    });




}
                }
            }