如何在android中将焦点更改为下一个编辑文本？
用户只能在编辑文本中输入一位数字。如果他在edtText1中输入值，我希望光标自动移动到edtText2，依此类推。用户可以编辑他/她已经输入的文本。我试着用下面的方法如何在android中将焦点更改为下一个编辑文本？,android,android-edittext,Android,Android Edittext,用户只能在编辑文本中输入一位数字。如果他在edtText1中输入值，我希望光标自动移动到edtText2，依此类推。用户可以编辑他/她已经输入的文本。我试着用下面的方法 edtPasscode1.setOnKeyListener(new OnKeyListener() { @Override public boolean onKey(View v, int keyCode, KeyEvent event) { // TODO Au
edtPasscode1.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if (edtPasscode1.getText().length() == 1)
edtPasscode2.requestFocus();
return false;
}
});
edtPasscode2.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if (edtPasscode2.getText().length() == 1)
edtPasscode3.requestFocus();
return false;
}
});
edtPasscode3.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
// TODO Auto-generated method stub
if (edtPasscode3.getText().length() == 1)
edtPasscode4.requestFocus();
return false;
}
});
如果用户编辑文本，光标将移动到其他一些编辑文本，并且无法按需要工作。如何实现上述目标？尝试TextWatcher而不是onKeyListener 因为如果你想编辑你的密码，在这种情况下，TextWatcher会给你更多的处理方法 编辑：-
StringBuilder sb=new StringBuilder();
edtPasscode1.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
if(sb.length()==0&edtPasscode1.length()==1)
{
sb.append(s);
edtPasscode1.clearFocus();
edtPasscode2.requestFocus();
edtPasscode2.setCursorVisible(true);
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
if(sb.length()==1)
{
sb.deleteCharAt(0);
}
}
public void afterTextChanged(Editable s) {
if(sb.length()==0)
{
edtPasscode1.requestFocus();
}
}
});
希望这能奏效。将editeText的长度设置为
android:maxLength=“1”((EditText) findViewById(R.id.edi1)).addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
if(((EditText) findViewById(R.id.edi1)).getText().toString().length()==1)
{
((EditText) findViewById(R.id.edi1)).clearFocus();
((EditText) findViewById(R.id.edi2)).requestFocus();
((EditText) findViewById(R.id.edi2)).setCursorVisible(true);
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
((EditText) findViewById(R.id.edi2)).addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
if(((EditText) findViewById(R.id.edi2)).getText().toString().length()==1)
{
((EditText) findViewById(R.id.edi2)).clearFocus();
((EditText) findViewById(R.id.edi3)).requestFocus();
((EditText) findViewById(R.id.edi3)).setCursorVisible(true);
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
((EditText) findViewById(R.id.edi3)).addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
// TODO Auto-generated method stub
if(((EditText) findViewById(R.id.edi3)).getText().toString().length()==1)
{
((EditText) findViewById(R.id.edi3)).clearFocus();
((EditText) findViewById(R.id.edi4)).requestFocus();
((EditText) findViewById(R.id.edi4)).setCursorVisible(true);
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
// TODO Auto-generated method stub
}
@Override
public void afterTextChanged(Editable s) {
// TODO Auto-generated method stub
}
});
将
android:maxLength=“1”ExitTextedtxt1 = (EditText) findViewById(R.id.edtxt_phonenumber_one);
edtxt2 = (EditText) findViewById(R.id.edtxt_phonenumber_two);
edtxt3 = (EditText) findViewById(R.id.edtxt_phonenumber_three);
edtxt1.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
if (s.length() ==1) {
edtxt2.requestFocus();
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
});
edtxt2.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
if (s.length() == 1) {
edtxt3.requestFocus();
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
});
edtxt3.addTextChangedListener(new TextWatcher() {
public void afterTextChanged(Editable s) {
if (s.length() == 1) {
edtxt1.requestFocus();
}
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
});
这应该可以使用您可以使用隐藏的编辑文本接收输入，四个文本视图来显示密码 例如： 对话框\u passworld.xml
公共类PasswordDialogBuilder扩展了AlertDialog.Builder{
公共密码对话框生成器（上下文）{
超级（上下文、displayMetrics、eventManager）；
查看contentView=LayoutInflater.from（上下文）。充气（R.layout.dialog\u密码，null）；
LinearLayout passcodeContainer=（LinearLayout）contentView.findviewbyd（R.id.passcode\u容器）；
最终列表密码视图=新的ArrayList（）；
int childCount=passcodeContainer.getChildCount（）；
for（int i=0；i// Show button Active code when enough fields active code
Observable<Boolean> mObsPhoneVerify1 = RxTextView.textChanges(db.etPhoneVerify1)
.observeOn(AndroidSchedulers.mainThread())
.map(charSequence -> {
if (!charSequence.toString().equals("")) {
db.etPhoneVerify2.requestFocus();
return true;
} else {
db.etPhoneVerify1.requestFocus();
return false;
}
});
Observable<Boolean> mObsPhoneVerify2 = RxTextView.textChanges(db.etPhoneVerify2)
.observeOn(AndroidSchedulers.mainThread())
.map(charSequence -> {
if (!charSequence.toString().equals("")) {
db.etPhoneVerify3.requestFocus();
return true;
} else {
db.etPhoneVerify1.requestFocus();
return false;
}
});
Observable<Boolean> mObsPhoneVerify3 = RxTextView.textChanges(db.etPhoneVerify3)
.observeOn(AndroidSchedulers.mainThread())
.map(charSequence -> {
if (!charSequence.toString().equals("")) {
db.etPhoneVerify4.requestFocus();
return true;
} else {
db.etPhoneVerify2.requestFocus();
return false;
}
});
Observable<Boolean> mObsPhoneVerify4 = RxTextView.textChanges(db.etPhoneVerify4)
.observeOn(AndroidSchedulers.mainThread())
.map(charSequence -> {
if (!charSequence.toString().equals("")) {
hideKeyboard();
return true;
} else {
/*
If enough text for all fields, no need cursor
Otherwise, focus previous edit text
*/
if (Utils.isValidEditText(db.etPhoneVerify1) && Utils.isValidEditText(db.etPhoneVerify2) && Utils.isValidEditText(db.etPhoneVerify3)) {
db.etPhoneVerify3.requestFocus();
} else {
db.etPhoneVerify1.clearFocus();
db.etPhoneVerify2.clearFocus();
db.etPhoneVerify3.clearFocus();
db.etPhoneVerify4.clearFocus();
}
return false;
}
});
disposable = Observable
.combineLatest(mObsPhoneVerify1, mObsPhoneVerify2, mObsPhoneVerify3, mObsPhoneVerify4,
(PhoneVerify1, PhoneVerify2, PhoneVerify3, PhoneVerify4)
-> PhoneVerify1 && PhoneVerify2 && PhoneVerify3 && PhoneVerify4)
.compose(regisObserver(false))
.subscribe(aBoolean -> {
db.btnActiveCode.setEnabled(aBoolean);
});
//当有足够的字段激活代码时显示按钮激活代码
Observable mObsPhoneVerify1=RxTextView.textChanges（db.etPhoneVerify1）
.observeOn（AndroidSchedulers.mainThread（））
.map（字符序列->{
如果（！charSequence.toString（）.equals（“”）{
db.etPhoneVerify2.requestFocus（）；
返回true；
}否则{
db.etPhoneVerify1.requestFocus（）；
返回false；
}
});
可观察的mObsPhoneVerify2=RxTextView.textChanges（db.etPhoneVerify2）
.observeOn（AndroidSchedulers.mainThread（））
.map（字符序列->{
如果（！charSequence.toString（）.equals（“”）{
db.etPhoneVerify3.requestFocus（）；
返回true；
}否则{
db.etPhoneVerify1.requestFocus（）；
返回false；
}
});
Observable mObsPhoneVerify3=RxTextView.textChanges（db.etPhoneVerify3）
.observeOn（AndroidSchedulers.mainThread（））
.map（字符序列->{
如果（！charSequence.toString（）.equals（“”）{
db.etPhoneVerify4.requestFocus（）；
返回true；
}否则{
db.etPhoneVerify2.requestFocus（）；
返回false；
}
});
Observable mObsPhoneVerify4=RxTextView.textChanges（db.etPhoneVerify4）
.observeOn（AndroidSchedulers.mainThread（））
.map（字符序列->{
如果（！charSequence.toString（）.equals（“”）{
隐藏板（）；
返回true；
}否则{
/*
如果所有字段都有足够的文本，则不需要光标
否则，聚焦上一个编辑文本
*/
if（Utils.isvaliditext（db.etPhoneVerify1）和&Utils.isvaliditext（db.etPhoneVerify2）和&Utils.isvaliditext（db.etPhoneVerify3））{
db.etPhoneVerify3.requestFocus（）；
}否则{
public class PasswordDialogBuilder extends AlertDialog.Builder {
public PasswordDialogBuilder(Context context) {
super(context, displayMetrics, eventManager);
View contentView = LayoutInflater.from(context).inflate(R.layout.dialog_password, null);
LinearLayout passcodeContainer = (LinearLayout) contentView.findViewById(R.id.passcode_container);
final List<TextView> passwordViews = new ArrayList<TextView>();
int childCount = passcodeContainer.getChildCount();
for (int i = 0; i < childCount; i++) {
View childView = passcodeContainer.getChildAt(i);
if (childView instanceof TextView) {
passwordViews.add((TextView) childView);
}
}
final int passwordCount = passwordViews.size();
EditText passwordView = (EditText) contentView.findViewById(R.id.passcode);
passwordView.setFilters(new InputFilter[] {new InputFilter.LengthFilter(passwordCount)});
passwordView.setInputType(EditorInfo.TYPE_CLASS_NUMBER);
passwordView.setCursorVisible(false);
passwordView.setTextColor(Color.TRANSPARENT);
passwordView.setBackgroundColor(Color.TRANSPARENT);
passwordView.setSingleLine();
passwordView.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {}
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
@Override
public void afterTextChanged(Editable s) {
int passwordLength = s.length();
for (int i = 0; i < passwordCount; i++) {
TextView passcodeView = passwordViews.get(i);
if (i < passwordLength) {
passcodeView.setText(String.valueOf(s.charAt(i)));
} else {
passcodeView.setText(StringUtils.EMPTY);
}
}
if (positiveButton != null) {
positiveButton.setEnabled(passwordLength == passwordCount);
}
}
});
setView(contentView);
}
}
// Show button Active code when enough fields active code
Observable<Boolean> mObsPhoneVerify1 = RxTextView.textChanges(db.etPhoneVerify1)
.observeOn(AndroidSchedulers.mainThread())
.map(charSequence -> {
if (!charSequence.toString().equals("")) {
db.etPhoneVerify2.requestFocus();
return true;
} else {
db.etPhoneVerify1.requestFocus();
return false;
}
});
Observable<Boolean> mObsPhoneVerify2 = RxTextView.textChanges(db.etPhoneVerify2)
.observeOn(AndroidSchedulers.mainThread())
.map(charSequence -> {
if (!charSequence.toString().equals("")) {
db.etPhoneVerify3.requestFocus();
return true;
} else {
db.etPhoneVerify1.requestFocus();
return false;
}
});
Observable<Boolean> mObsPhoneVerify3 = RxTextView.textChanges(db.etPhoneVerify3)
.observeOn(AndroidSchedulers.mainThread())
.map(charSequence -> {
if (!charSequence.toString().equals("")) {
db.etPhoneVerify4.requestFocus();
return true;
} else {
db.etPhoneVerify2.requestFocus();
return false;
}
});
Observable<Boolean> mObsPhoneVerify4 = RxTextView.textChanges(db.etPhoneVerify4)
.observeOn(AndroidSchedulers.mainThread())
.map(charSequence -> {
if (!charSequence.toString().equals("")) {
hideKeyboard();
return true;
} else {
/*
If enough text for all fields, no need cursor
Otherwise, focus previous edit text
*/
if (Utils.isValidEditText(db.etPhoneVerify1) && Utils.isValidEditText(db.etPhoneVerify2) && Utils.isValidEditText(db.etPhoneVerify3)) {
db.etPhoneVerify3.requestFocus();
} else {
db.etPhoneVerify1.clearFocus();
db.etPhoneVerify2.clearFocus();
db.etPhoneVerify3.clearFocus();
db.etPhoneVerify4.clearFocus();
}
return false;
}
});
disposable = Observable
.combineLatest(mObsPhoneVerify1, mObsPhoneVerify2, mObsPhoneVerify3, mObsPhoneVerify4,
(PhoneVerify1, PhoneVerify2, PhoneVerify3, PhoneVerify4)
-> PhoneVerify1 && PhoneVerify2 && PhoneVerify3 && PhoneVerify4)
.compose(regisObserver(false))
.subscribe(aBoolean -> {
db.btnActiveCode.setEnabled(aBoolean);
});
otp_1.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
//
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
//
if(editable.length()>0){
otp_1.clearFocus();
otp_2.requestFocus();
otp_2.setCursorVisible(true);
}
}
});
otp_2.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
//
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
//
if(editable.length() > 0) {
otp_2.clearFocus();
otp_3.requestFocus();
otp_3.setCursorVisible(true);
}
}
});
otp_3.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
//
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
if(editable.length() > 0) {
otp_3.clearFocus();
otp_4.requestFocus();
otp_4.setCursorVisible(true);
}
}
});
<EditText
android:id="@+id/edt1"
android:layout_width="40dp"
android:layout_height="40dp"
android:inputType="number"
android:textAlignment="center"
android:singleLine="true"
android:maxLength="1"
android:maxLines="1"
android:imeOptions="actionNext"
android:layout_margin="5dp"
android:background="@drawable/edittext_shape_bg"/>
<EditText
android:id="@+id/edt2"
android:layout_width="40dp"
android:layout_height="40dp"
android:inputType="number"
android:textAlignment="center"
android:singleLine="true"
android:maxLength="1"
android:imeOptions="actionNext"
android:maxLines="1"
android:layout_margin="5dp"
android:background="@drawable/edittext_shape_bg"/>
<EditText
android:id="@+id/edt3"
android:layout_width="40dp"
android:layout_height="40dp"
android:inputType="number"
android:textAlignment="center"
android:singleLine="true"
android:maxLength="1"
android:imeOptions="actionNext"
android:maxLines="1"
android:layout_margin="5dp"
android:background="@drawable/edittext_shape_bg"/>
edt1.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
String edtChar=edt1.getText().toString();
if(edtChar.length()==1)
{
currentCode.append(edtChar);
edt2.requestFocus();
}else if(edtChar.length()==0) {
currentCode.deleteCharAt(0);
edt1.requestFocus();
}
}
});
edt2.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
String edtChar=edt2.getText().toString();
if(edtChar.length()==1)
{
currentCode.append(edtChar);
edt3.requestFocus();
}else if(edtChar.length()==0) {
currentCode.deleteCharAt(1);
edt1.requestFocus();
}
}
});
edt3.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void afterTextChanged(Editable editable) {
String edtChar=edt3.getText().toString();
if(edtChar.length()==1)
{
currentCode.append(edtChar);
edt4.requestFocus();
}else if(edtChar.length()==0) {
currentCode.deleteCharAt(2);
edt2.requestFocus();
}
}
});
<EditText
android:id="@+id/edtUsername"
android:nextFocusDown="@id/edtPassword"
style="@style/EditText"
/>
<EditText
android:id="@+id/edtPassword"
style="@style/EditText.Password"
/>
private fun addEditTextListener(editText: EditText?, nextEditText: EditText?) {
editText?.setOnFocusChangeListener { view, focused ->
if (focused) {
editText.text = null
}
}
editText?.addTextChangedListener {
if (it.toString().isNotEmpty()) {
if (nextEditText != null) {
nextEditText.requestFocus()
} else {
viewModel.confirmCode(
binding?.digit1?.text?.toString(),
binding?.digit2?.text?.toString(),
binding?.digit3?.text?.toString(),
binding?.digit4?.text?.toString(),
)
}
}
}
}
override fun setupViews() {
addEditTextListener(binding?.digit1, binding?.digit2)
addEditTextListener(binding?.digit2, binding?.digit3)
addEditTextListener(binding?.digit3, binding?.digit4)
addEditTextListener(binding?.digit4, null)
}