/**  * @author hydCoder  * @date 2017/9/22 14:39  * @desc 輸入驗證碼的自定義view  * @email hyd_coder@163.com  */public class VerificationCodeInput extends LinearLayout implements TextWatcher, View.OnKeyListener{private final static String TYPE_NUMBER = "number";private final static String TYPE_TEXT = "text";private final static String TYPE_PASSWORD = "password";private final static String TYPE_PHONE = "phone";private static final String  TAG      = "VerificationCodeInput";private       int   box      = 4;private       int   boxWidth   = 80;private       int   boxHeight   = 80;private       int   childHPadding = 14;private       int   childVPadding = 14;private       String  inputType   = TYPE_NUMBER;private       Drawable boxBgFocus  = null;private       Drawable boxBgNormal  = null;private Listener listener;private boolean    focus      = false;private List<EditText> mEditTextList  = new ArrayList<>();private int      currentPosition = 0;public VerificationCodeInput(Context context, AttributeSet attrs) {  super(context, attrs);  TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.vericationCodeInput);  box = a.getInt(R.styleable.vericationCodeInput_box, 4);  childHPadding = (int) a.getDimension(R.styleable.vericationCodeInput_child_h_padding, 0);  childVPadding = (int) a.getDimension(R.styleable.vericationCodeInput_child_v_padding, 0);  boxBgFocus = a.getDrawable(R.styleable.vericationCodeInput_box_bg_focus);  boxBgNormal = a.getDrawable(R.styleable.vericationCodeInput_box_bg_normal);  inputType = a.getString(R.styleable.vericationCodeInput_inputType);  boxWidth = (int) a.getDimension(R.styleable.vericationCodeInput_child_width, boxWidth);  boxHeight = (int) a.getDimension(R.styleable.vericationCodeInput_child_height, boxHeight);  initViews();}@Overrideprotected void onAttachedToWindow() {  super.onAttachedToWindow();}@Overrideprotected void onDetachedFromWindow() {  super.onDetachedFromWindow();}private void initViews() {  for (int i = 0; i < box; i++) {    EditText editText = new EditText(getContext());    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(boxWidth, boxHeight);    layoutParams.bottomMargin = childVPadding;    layoutParams.topMargin = childVPadding;    layoutParams.leftMargin = childHPadding;    layoutParams.rightMargin = childHPadding;    layoutParams.gravity = Gravity.CENTER;    editText.setOnKeyListener(this);    if(i == 0)      setBg(editText, true);    else setBg(editText, false);    editText.setTextColor(Color.BLACK);    editText.setLayoutParams(layoutParams);    editText.setGravity(Gravity.CENTER);    editText.setInputType(EditorInfo.TYPE_CLASS_PHONE);    editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(1)});    if (TYPE_NUMBER.equals(inputType)) {      editText.setInputType(InputType.TYPE_CLASS_NUMBER);    } else if (TYPE_PASSWORD.equals(inputType)){      editText.setTransformationMethod(PasswordTransformationMethod.getInstance());    } else if (TYPE_TEXT.equals(inputType)){      editText.setInputType(InputType.TYPE_CLASS_TEXT);    } else if (TYPE_PHONE.equals(inputType)){      editText.setInputType(InputType.TYPE_CLASS_PHONE);    }    editText.setId(i);    editText.setEms(1);    editText.addTextChangedListener(this);    addView(editText,i);    mEditTextList.add(editText);  }}private void backFocus() {  int count = getChildCount();  EditText editText ;  for (int i = count-1; i>= 0; i--) {    editText = (EditText) getChildAt(i);    if (editText.getText().length() == 1) {      editText.requestFocus();      setBg(mEditTextList.get(i),true);      //setBg(mEditTextList.get(i-1),true);      editText.setSelection(1);      return;    }  }}private void focus() {  int count = getChildCount();  EditText editText ;  for (int i = 0; i< count; i++) {    editText = (EditText) getChildAt(i);    if (editText.getText().length() < 1) {      editText.requestFocus();      return;    }  }}private void setBg(EditText editText, boolean focus) {  if (boxBgNormal != null && !focus) {    editText.setBackground(boxBgNormal);  } else if (boxBgFocus != null && focus) {    editText.setBackground(boxBgFocus);  }}private void setBg(){  int count = getChildCount();  EditText editText ;  for(int i = 0; i< count; i++){    editText = (EditText) getChildAt(i);    if (boxBgNormal != null && !focus) {      editText.setBackground(boxBgNormal);    } else if (boxBgFocus != null && focus) {      editText.setBackground(boxBgFocus);    }  }}private void checkAndCommit() {  StringBuilder stringBuilder = new StringBuilder();  boolean full = true;  for (int i = 0 ;i < box; i++){    EditText editText = (EditText) getChildAt(i);    String content = editText.getText().toString();    if ( content.length() == 0) {      full = false;      break;    } else {      stringBuilder.append(content);    }  }  if (full){    if (listener != null) {      listener.onComplete(stringBuilder.toString());      setEnabled(false);    }  }}@Overridepublic void setEnabled(boolean enabled) {  int childCount = getChildCount();  for (int i = 0; i < childCount; i++) {    View child = getChildAt(i);    child.setEnabled(enabled);  }}public void setOnCompleteListener(Listener listener){  this.listener = listener;}@Overridepublic LayoutParams generateLayoutParams(AttributeSet attrs) {  return new LinearLayout.LayoutParams(getContext(), attrs);}@Overrideprotected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {  super.onMeasure(widthMeasureSpec, heightMeasureSpec);  int count = getChildCount();  for (int i = 0; i < count; i++) {    View child = getChildAt(i);    this.measureChild(child, widthMeasureSpec, heightMeasureSpec);  }  if (count > 0) {    View child = getChildAt(0);    int cHeight = child.getMeasuredHeight();    int cWidth = child.getMeasuredWidth();    int maxH = cHeight + 2 * childVPadding;    int maxW = (cWidth + childHPadding) * box + childHPadding;    setMeasuredDimension(resolveSize(maxW, widthMeasureSpec),        resolveSize(maxH, heightMeasureSpec));  }}@Overrideprotected void onLayout(boolean changed, int l, int t, int r, int b) {  int childCount = getChildCount();  for (int i = 0; i < childCount; i++) {    View child = getChildAt(i);    child.setVisibility(View.VISIBLE);    int cWidth = child.getMeasuredWidth();    int cHeight = child.getMeasuredHeight();    int cl = (i) * (cWidth + childHPadding);    int cr = cl + cWidth;    int ct = childVPadding;    int cb = ct + cHeight;    child.layout(cl, ct, cr, cb);  }}@Overridepublic void beforeTextChanged(CharSequence s, int start, int count, int after) {}@Overridepublic void onTextChanged(CharSequence s, int start, int before, int count) {  if (start == 0 && count >= 1 && currentPosition != mEditTextList.size() - 1) {    currentPosition++;    mEditTextList.get(currentPosition).requestFocus();    setBg(mEditTextList.get(currentPosition),true);    setBg(mEditTextList.get(currentPosition-1),false);  }}@Overridepublic void afterTextChanged(Editable s) {  if (s.length() == 0) {  } else {    focus();    checkAndCommit();  }}@Overridepublic boolean onKey(View view, int keyCode, KeyEvent event) {  EditText editText = (EditText) view;  if (keyCode == KeyEvent.KEYCODE_DEL && editText.getText().length() == 0) {    int action = event.getAction();    if (currentPosition != 0 && action == KeyEvent.ACTION_DOWN) {      currentPosition--;      mEditTextList.get(currentPosition).requestFocus();      setBg(mEditTextList.get(currentPosition),true);      setBg(mEditTextList.get(currentPosition+1),false);      mEditTextList.get(currentPosition).setText("");    }  }  return false;}public interface Listener {  void onComplete(String content);}} ··· styles.xml里添加自定義屬性<declare-styleable name="vericationCodeInput">  <attr name="box" format="integer" />  <attr name="child_h_padding" format="dimension"/>  <attr name="child_v_padding" format="dimension"/>  <attr name="child_width" format="dimension"/>  <attr name="child_height" format="dimension"/>  <attr name="padding" format="dimension"/>  <attr name="box_bg_focus" format="reference"/>  <attr name="box_bg_normal" format="reference"/>  <attr name="inputType" format="string"/></declare-styleable>輸入框獲取焦點時的背景verification_edit_bg_focus.xml<shape xmlns:android="http://schemas.android.com/apk/res/android"><solid android:color="#FFFFFF" /><corners android:radius="8dip" /><stroke  android:width="2dip"  android:color="@color/auxiliary_color" /></shape>

verification_edit_bg_normal.xml<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android">  <solid android:color="@color/white" />  <corners android:radius="8dip" />  <stroke    android:width="1dip"    android:color="@color/divide_color"/></shape>

<com.sdalolo.genius.ui.view.VerificationCodeInput  android:digits="1234567890"  android:id="@+id/verificationCodeInput"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="25dp"  android:layout_gravity="center_horizontal"  ver:box="6"  ver:box_bg_normal="@drawable/verification_edit_bg_normal"  ver:box_bg_focus="@drawable/verification_edit_bg_focus"  ver:child_h_padding="5dp"  android:layout_centerInParent="true"  android:layout_marginBottom="16dp"/>

verificationCodeInput.setOnCompleteListener(new VerificationCodeInput.Listener() {    @Override    public void onComplete(String content) {      btn_confirm.setEnabled(true);      btn_confirm.setBackgroundResource(R.drawable.btn_bg_shape_enable);      btn_confirm.setTextColor(Color.parseColor("#e4c16a"));      codeNum = content;    }  });