本文实例为大家分享了android自定义view验证码输入框的具体代码，供大家参考，具体内容如下
验证码输入框
1.先看下样式
2.直接上代码
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public class myvcode extends appcompatedittext {
private int mfigures = 0;// 验证码个数
private int mcodemargin = 0;// 验证码之间的间距
private int mselectcolor = 0;// 选中框的颜色
private int mnormalcolor = 0;// 普通框的颜色
private float mborderwidth = 0f;// 边框的厚度
paint mnormalpaint = new paint();
paint mselectpaint = new paint();
paint mokcontentpain = new paint();//填写了内容的验证码
private onverifycodechangedlistener onverifycodechangedlistener;
private int mcurrentposition = 0;// 当前验证码的位置
private int meachrectlength = 0;// 矩形边长
public myvcode(context context) {
super(context, null);
}
public myvcode(context context, attributeset attrs) {
super(context, attrs);
initattr(context,attrs);
initpaint();
setfocusableintouchmode(true);
inittextchangelisterner();
}
private void inittextchangelisterner() {
addtextchangedlistener(new textwatcher() {
@override
public void beforetextchanged(charsequence s, int start, int count, int after) {
mcurrentposition = gettext().length();
}
@override
public void ontextchanged(charsequence s, int start, int before, int count) {
mcurrentposition = gettext().length();
postinvalidate();
if (onverifycodechangedlistener!=null){
onverifycodechangedlistener.onvercodechanged(gettext().tostring(),start,before,count);
}
}
@override
public void aftertextchanged(editable s) {
mcurrentposition = gettext().length();
postinvalidate();
if (gettext().length() == mfigures){
if (onverifycodechangedlistener!=null){
onverifycodechangedlistener.oninputcompleted(gettext().tostring());
}
}else if (gettext().length()>mfigures){
gettext().delete(mfigures,gettext().length());
}
}
});
}
@override
public boolean ontouchevent(motionevent event) {
if (event.getaction()==motionevent.action_down){
requestfocus();
setselection(gettext().length());
showkeyboard(getcontext());
return false;
}
return super.ontouchevent(event);
}
private void showkeyboard( context context) {
inputmethodmanager imm = (inputmethodmanager) context.getsystemservice(context.input_method_service);
imm.showsoftinput(this, inputmethodmanager.show_forced);
}
private void initattr(context context, attributeset attrs) {
typedarray ta = context.obtainstyledattributes(attrs, r.styleable.verifycodeedittext);
mfigures = ta.getinteger(r.styleable.verifycodeedittext_figures, 6);
mcodemargin = (int) ta.getdimension(r.styleable.verifycodeedittext_codemargin, 0f);
mselectcolor = ta.getcolor(r.styleable.verifycodeedittext_selectbordercolor,getresources().getcolor(r.color.base_barcolor));
mnormalcolor =
ta.getcolor(
r.styleable.verifycodeedittext_normalbordercolor,
getresources().getcolor(android.r.color.darker_gray)
);
mborderwidth = ta.getdimension(r.styleable.verifycodeedittext_borderwidth, 1f);
/* mcursorcolor =
ta.getcolor(
r.styleable.verifycodeedittext_cursorcolor,
getresources().getcolor(android.r.color.darker_gray)
);
ta.recycle();*/
/* // force ltr because of bug: https://github.com/justkiddingbaby/vercodeedittext/issues/4
if (build.version.sdk_int >= build.version_codes.jelly_bean_mr1) {
layoutdirection = layout_direction_ltr
}*/
}
private void initpaint() {
mnormalpaint.setantialias(true);
mnormalpaint.setcolor(mnormalcolor);
mnormalpaint.setstyle(paint.style.fill_and_stroke);
mnormalpaint.setstrokewidth(mborderwidth);
mselectpaint.setantialias(true);
mselectpaint.setcolor(mselectcolor);
mselectpaint.setstyle(paint.style.stroke);
mselectpaint.setstrokewidth(mborderwidth);
mokcontentpain.setantialias(true);
mokcontentpain.setcolor(mselectcolor);
mokcontentpain.setstyle(paint.style.fill_and_stroke);
mokcontentpain.setstrokewidth(mborderwidth);
}
@override
protected void onmeasure(int widthmeasurespec, int heightmeasurespec) {
super.onmeasure(widthmeasurespec, heightmeasurespec);
int size = measurespec.getsize(heightmeasurespec);
// 每个矩形的宽度 相当于我门圆的直径
meachrectlength = size ;
}
@override
protected void ondraw(canvas canvas) {
//super.ondraw(canvas);
editable text = this.gettext();
mcurrentposition = text.length();
int width = meachrectlength -getpaddingleft() - getpaddingright();
for (int i =0 ;i< mfigures;i++){
canvas.save();
float start = width*i +mcodemargin*i+mborderwidth;
float end = start+width - mborderwidth;
if (i==mfigures-1){
end -= mborderwidth;
}
rectf rect = new rectf(start, mborderwidth, end, width - mborderwidth);
//画底色
canvas.drawarc(rect, 0f, 360f, true, mnormalpaint);
if (i == mcurrentposition) {//选中的下一个状态
canvas.drawarc(rect, 0f, 360f, true, mnormalpaint);
canvas.drawarc(rect, 0f, 360f, true, mselectpaint);
}else {
canvas.drawarc(rect, 0f, 360f, true, mnormalpaint);
}
if (mcurrentposition>i){
//画已经有内容的
canvas.drawarc(rect, 0f, 360f, true, mokcontentpain);
}
canvas.restore();
}
string s = text.tostring();
//画文字
for (int i = 0;i<mcurrentposition;i++){
canvas.save();
int start = width * i + mcodemargin * i;
float x = start + width / 2f;
textpaint paint = getpaint();
paint.settextalign(paint.align.center);
paint.setcolor(getcurrenttextcolor());
paint.fontmetrics fontmetrics = paint.getfontmetrics();
float baseline = (width - fontmetrics.bottom + fontmetrics.top) / 2 - fontmetrics.top;
canvas.drawtext(s.substring(i,i+1), x, baseline, paint);
canvas.restore();
}
}
/**
* 验证码变化时候的监听事件
*/
interface onverifycodechangedlistener {
/**
* 当验证码变化的时候
*/
public void onvercodechanged(string s,int start, int before, int count);
/**
* 输入完毕后的回调
*/
public void oninputcompleted(string s);
}
}
3.自定义的属性
<!--验证码的属性-->
<declare-styleable name="verifycodeedittext">
<attr name="figures" format="integer"/><!--验证码的个数-->
<attr name="codemargin" format="dimension"/><!--验证码的之间的间隔-->
<attr name="selectbordercolor" format="color|reference"/><!--选中的边框颜色-->
<attr name="normalbordercolor" format="color|reference"/><!--普通的边框颜色-->
<attr name="borderwidth" format="dimension"/><!--边框的厚度 -->
<attr name="cursorcolor" format="color|reference"/><!--已经有内容的颜色 -->
</declare-styleable>
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