Android如何在单击退格时关注另一个edittext

概述我正在尝试让Pin进入页面,我创建了4个EditTexts,并在我的活动中创建了一个函数.我的问题是,当我单击退格按钮时,我想将当前EditText聚焦到Before(Back)EditText,但是Key listener不起作用. 逻辑很简单,当用户输入编辑文本的数字时,它会失去焦点,然后编辑文本会变得焦点,然后它会变成这样.但问题是当我点击后退空间我想在edittext之前返回再次输入数字. 我正在尝试让Pin进入页面,我创建了4个EditTexts,并在我的活动中创建了一个函数.我的问题是,当我单击退格按钮时,我想将当前EditText聚焦到Before(Back)EditText,但是Key Listener不起作用.

逻辑很简单,当用户输入编辑文本的数字时,它会失去焦点,然后编辑文本会变得焦点,然后它会变成这样.但问题是当我点击后退空间我想在edittext之前返回再次输入数字.我试图在beforeTextChange中插入keyListener,但它没有工作.

private voID SetTextChange(final EditText etCurrent,final EditText etForward,final EditText etBack,final boolean isLast,final int currentposition){    etCurrent.addTextChangedListener(new TextWatcher() {        @OverrIDe        public voID beforeTextChanged(CharSequence s,int start,int count,int after) {        }        @OverrIDe        public voID onTextChanged(CharSequence s,int before,int count) {            if (etCurrent.getText().length() == 1 && !isLast ) {                etCurrent.setTypeface(null,Typeface.norMAL);                etCurrent.clearFocus();                etForward.requestFocus();                etForward.setCursorVisible(true);                etCurrent.getBackground().setcolorFilter(getResources().getcolor(R.color.lavender_indigo),PorterDuff.Mode.SRC_Atop);            } else if (etCurrent.length() == 0) {                etCurrent.getBackground().setcolorFilter(getResources().getcolor(R.color.french_gray),PorterDuff.Mode.SRC_Atop);                etCurrent.setTypeface(null,Typeface.SANS_serif.getStyle());                etCurrent.setTypeface(null,Typeface.norMAL);                etCurrent.clearFocus();                etBack.requestFocus();                etBack.setCursorVisible(true);            }            if (etCurrent.length() != 0) {                Integer currentKey = Integer.parseInt(etCurrent.getText().toString());                keyList.set(currentposition,currentKey);            } else                keyList.set(currentposition,-1);            if (keyList.size() > 3)                showToast(keyList.get(0) + " " + keyList.get(1) + " " + keyList.get(2) + " " + keyList.get(3));        }        @OverrIDe        public voID afterTextChanged(Editable s) {        }    });    /*curText.setonFocuschangelistener(new VIEw.OnFocuschangelistener() {        public voID onFocusChange(VIEw arg0,boolean arg1) {            curText = etCurrent;            backText = etBack;            curText.setText("");        }        });*/    }

这也是我的EditText示例xml之一.(其他都是一样的)

<EditText        androID:layout_column="1"        androID:layout_columnWeight="1"        androID:ID="@+ID/etActivationDigit1"        androID:layout_wIDth="70dp"        androID:layout_height="wrap_content"        androID:textSize="80dp"        androID:textAlignment="center"        androID:gravity="center_horizontal"        androID:hint="*"        androID:textcolorHint="@color/french_gray"        androID:backgroundTint="@color/french_gray"        androID:FontFamily="sans-serif"        androID:textcolor="@color/perfume"        androID:maxLength="1"        androID:inputType="number"         />

当用户输入错误的号码时,我只想擦除并重新聚焦.注意：当你填写所有字段时,你会看到你可以删除并返回,但我想回到密码的中间位置.谢谢.

etCurrent.setonKeyListener(new VIEw.OnKeyListener() {        @OverrIDe        public boolean onKey(VIEw v,int keyCode,KeyEvent event) {            if(etCurrent.getText().toString() == "" && keyCode == event.KEYCODE_DEL)            {                etCurrent.setText("");                etCurrent.clearFocus();                etBack.requestFocus();                etBack.setText("");            }            return false;        }    });

当我触摸退格键时,我的Backspace侦听器不会触发,但会触发所有其他字符.

解决方法 这适用于我的4位密码活动.

private voID setupinputListeners() {    verificationCode1EditText.addTextChangedListener(new TextWatcher() {        @OverrIDe        public voID beforeTextChanged(CharSequence s,int count) {            if (s.length() == 1) {                verificationCode2EditText.requestFocus(VIEw.FOCUS_DOWN);            }        }        @OverrIDe        public voID afterTextChanged(Editable s) {        }    });    verificationCode2EditText.addTextChangedListener(new TextWatcher() {        @OverrIDe        public voID beforeTextChanged(CharSequence s,int count) {            if(count == 0) {                verificationCode1EditText.requestFocus(VIEw.FOCUS_DOWN);            } else {                if (s.length() == 1) {                    verificationCode3EditText.requestFocus(VIEw.FOCUS_DOWN);                }            }        }        @OverrIDe        public voID afterTextChanged(Editable s) {        }    });    verificationCode3EditText.addTextChangedListener(new TextWatcher() {        @OverrIDe        public voID beforeTextChanged(CharSequence s,int count) {            if(count == 0) {                verificationCode2EditText.requestFocus(VIEw.FOCUS_DOWN);            } else {                if (s.length() == 1) {                    verificationCode4EditText.requestFocus(VIEw.FOCUS_DOWN);                }            }        }        @OverrIDe        public voID afterTextChanged(Editable s) {        }    });    verificationCode4EditText.addTextChangedListener(new TextWatcher() {        @OverrIDe        public voID beforeTextChanged(CharSequence s,int count) {            if(count == 0) {                verificationCode3EditText.requestFocus(VIEw.FOCUS_DOWN);            }        }        @OverrIDe        public voID afterTextChanged(Editable s) {        }    });}

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