Android实现方框验证码功能

<?xml version="1.0" encoding="utf-8"?><resources>
    <declare-styleable name="VerificationCodeView">        <!-- 验证码长度 -->        <attr name="vCodeDataLength" format="integer" />        <!-- 验证码字体大小 -->        <attr name="vCodeTextSize" format="dimension" />        <!-- 验证码字体颜色 -->        <attr name="vCodeTextColor" format="color" />        <!-- 验证码框的宽度 -->        <attr name="vCodeWidth" format="dimension" />        <!-- 验证码框的高度 -->        <attr name="vCodeHeight" format="dimension" />        <!-- 验证码框间距 -->        <attr name="vCodeMargin" format="dimension" />        <!-- 验证码默认背景 -->        <attr name="vCodeBackgroundNormal" format="reference" />        <!-- 验证码焦点背景 -->        <attr name="vCodeBackgroundFocus" format="reference" />    </declare-styleable>
</resources>

?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle">
    <solid android:color="@color/white"/>
    <stroke android:color="@color/grey"        android:width="1dp"/>
</shape>

public class VerificationCodeView extends RelativeLayout {    //输入的长度    private int vCodeLength = 6;    //输入的内容    private String inputData;    private EditText editText;
    //TextView的list    private List<TextView> tvList = new ArrayList<>();    //输入框默认背景    private int tvBgNormal = R.drawable.verification_code_et_bg_normal;    //输入框焦点背景    private int tvBgFocus = R.drawable.verification_code_et_bg_focus;    //输入框的间距    private int tvMarginRight = 10;    //TextView宽    private int tvWidth = 45;    //TextView高    private int tvHeight = 45;    //TextView字体颜色    private int tvTextColor;    //TextView字体大小    private float tvTextSize = 8;
    public VerificationCodeView(Context context) {        this(context, null);    }
    public VerificationCodeView(Context context, AttributeSet attrs) {        this(context, attrs, 0);    }
    public VerificationCodeView(Context context, AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);       }    }

/** * 设置TextView */private void initTextView() {    LinearLayout linearLayout = new LinearLayout(getContext());    addView(linearLayout);    LayoutParams llLayoutParams = (LayoutParams) linearLayout.getLayoutParams();    llLayoutParams.width = LayoutParams.MATCH_PARENT;    llLayoutParams.height = LayoutParams.WRAP_CONTENT;    //linearLayout.setLayoutParams(llLayoutParams);    //水平排列    linearLayout.setOrientation(LinearLayout.HORIZONTAL);    //内容居中    linearLayout.setGravity(Gravity.CENTER);    for (int i = 0; i < vCodeLength; i++) {        TextView textView = new TextView(getContext());        linearLayout.addView(textView);
        LinearLayout.LayoutParams layoutParams = (LinearLayout.LayoutParams) textView.getLayoutParams();        layoutParams.width = tvWidth;        layoutParams.height = tvHeight;        //只需将中间隔开，所以最后一个textView不需要margin        if (i == vCodeLength - 1) {            layoutParams.rightMargin = 0;        } else {            layoutParams.rightMargin = tvMarginRight;        }
        //textView.setLayoutParams(layoutParams);        textView.setBackgroundResource(tvBgNormal);        textView.setGravity(Gravity.CENTER);        //注意单位        textView.setTextSize(TypedValue.COMPLEX_UNIT_PX,tvTextSize);        textView.setTextColor(tvTextColor);
        tvList.add(textView);    }}

/** * 输入框和父布局一样大，但字体大小0，看不见的 */private void initEditText() {    editText = new EditText(getContext());    addView(editText);    LayoutParams layoutParams = (LayoutParams) editText.getLayoutParams();    layoutParams.width = layoutParams.MATCH_PARENT;    layoutParams.height = tvHeight;    editText.setLayoutParams(layoutParams);
    //防止横盘小键盘全屏显示    editText.setImeOptions(EditorInfo.IME_FLAG_NO_FULLSCREEN);    //隐藏光标    editText.setCursorVisible(false);    //最大输入长度    editText.setFilters(new InputFilter[]{new InputFilter.LengthFilter(vCodeLength)});    //输入类型为数字    editText.setInputType(InputType.TYPE_CLASS_NUMBER);    editText.setTextSize(0);    editText.setBackgroundResource(0);
    editText.addTextChangedListener(new TextWatcher() {        @Override        public void beforeTextChanged(CharSequence s, int start, int count, int after) {        }
        @Override        public void onTextChanged(CharSequence s, int start, int before, int count) {            if (s != null && !TextUtils.isEmpty(s.toString())) {                //有验证码的情况                inputData = s.toString();
                //如果是最后一位验证码，焦点在最后一个，否者在下一位                if (inputData.length() == vCodeLength) {                    tvSetFocus(vCodeLength - 1);                } else {                    tvSetFocus(inputData.length());                }
                //给textView设置数据                for (int i = 0; i < inputData.length(); i++) {                    tvList.get(i).setText(inputData.substring(i, i + 1));                }                for (int i = inputData.length(); i < vCodeLength; i++) {                    tvList.get(i).setText("");                }            } else {                //一位验证码都没有的情况                tvSetFocus(0);                for (int i = 0; i < vCodeLength; i++) {                    tvList.get(i).setText("");                }            }        }
        @Override        public void afterTextChanged(Editable s) {         if (null != onVerificationCodeCompleteListener) {                if (s.length() == vCodeLength) {                    onVerificationCodeCompleteListener.verificationCodeComplete(s.toString());                } else {                    onVerificationCodeCompleteListener.verificationCodeIncomplete(s.toString());                }            }        }    });}
/** * 假装获取焦点 */private void tvSetFocus(int index) {    tvSetFocus(tvList.get(index));}
private void tvSetFocus(TextView textView) {    for (int i = 0; i < vCodeLength; i++) {        tvList.get(i).setBackgroundResource(tvBgNormal);    }    //重新获取焦点    textView.setBackgroundResource(tvBgFocus);}

public VerificationCodeView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);    init();}
private void init() {    initTextView();    initEditText();    tvSetFocus(0);}/** * 输入完成回调接口 */public interface OnVerificationCodeCompleteListener {    void verificationCodeComplete(String verificationCode);}
public void setOnVerificationCodeCompleteListener(OnVerificationCodeCompleteListener onVerificationCodeCompleteListener) {    this.onVerificationCodeCompleteListener = onVerificationCodeCompleteListener;}

<com.wuyanhua.verificationcodeview.VerificationCodeView    android:id="@+id/verificationCodeView"    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:paddingBottom="20dp"    android:paddingTop="20dp"    app:vCodeBackgroundFocus="@drawable/verification_code_et_bg_focus"    app:vCodeBackgroundNormal="@drawable/verification_code_et_bg_normal"    app:vCodeDataLength="6"    app:vCodeHeight="45dp"    app:vCodeMargin="10dp"    app:vCodeTextColor="@color/black"    app:vCodeTextSize="8sp"    app:vCodeWidth="45dp" />

public VerificationCodeView(Context context, AttributeSet attrs, int defStyleAttr) {    super(context, attrs, defStyleAttr);
    //获取自定义样式的属性    TypedArray typedArray = context.getTheme().obtainStyledAttributes(attrs, R.styleable.VerificationCodeView, defStyleAttr, 0);    for (int i = 0; i < typedArray.getIndexCount(); i++) {        int attr = typedArray.getIndex(i);        if (attr == R.styleable.VerificationCodeView_vCodeDataLength) {            //验证码长度            vCodeLength = typedArray.getInteger(attr, 6);        } else if (attr == R.styleable.VerificationCodeView_vCodeTextColor) {            //验证码字体颜色            tvTextColor = typedArray.getColor(attr, Color.BLACK);        } else if (attr == R.styleable.VerificationCodeView_vCodeTextSize) {            //验证码字体大小            tvTextSize = typedArray.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, 8, getResources().getDisplayMetrics()));        } else if (attr == R.styleable.VerificationCodeView_vCodeWidth) {            //方框宽度            tvWidth = typedArray.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 45, getResources().getDisplayMetrics()));        } else if (attr == R.styleable.VerificationCodeView_vCodeHeight) {            //方框宽度            tvHeight = typedArray.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,45,getResources().getDisplayMetrics()));        }else if(attr == R.styleable.VerificationCodeView_vCodeMargin){            //方框间隔            tvMarginRight = typedArray.getDimensionPixelSize(attr, (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,10,getResources().getDisplayMetrics()));        }else if(attr == R.styleable.VerificationCodeView_vCodeBackgroundNormal){            //默认背景            tvBgNormal = typedArray.getResourceId(attr,R.drawable.verification_code_et_bg_normal);        }else if(attr == R.styleable.VerificationCodeView_vCodeBackgroundFocus){            //焦点背景            tvBgFocus = typedArray.getResourceId(attr,R.drawable.verification_code_et_bg_focus);        }    }    //用完回收    typedArray.recycle();    init();}

https://github.com/Goodbao/VerificaitionCodeView