先看 输入框的样式（换了电脑图都没了，就用我csdn上的图片了 - - .），
image
看到效果图，我们就在脑海里想到了几种实现方法， 可以用很多个editext进行实现，也可以自定义view实现，自定义毕竟听起来高大上，所以就他了吧。 O 道理我都懂先上效果图。
image
思路
正常思路应该是先画一个带圆角的边框，然后根据密码的位数划线，写一个回调接口监听Editext的变化。
image
特别注意
this.setCursorVisible(false); 隐藏光标。
//super.onDraw(canvas); 要注释掉，要不然edittext 会执行内部方法，绘制内容到view中
在xml文件中： android:background=”@null” 去掉下划线。
画中间线
/**
* 支付密码的样式
*
* @param canvas
*/
private void drawWeChatBorder(Canvas canvas) {
for (int i = 0; i < maxCount - 1; i++) {
canvas.drawLine((i + 1) * divideLineWStartX,
0,
(i + 1) * divideLineWStartX,
height,
divideLinePaint);
}
}
画密码实心圆
/**
* 画密码实心圆
*
* @param canvas
*/
private void drawPsdCircle(Canvas canvas) {
for (int i = 0; i < textLength; i++) {
canvas.drawCircle(startX + i * 2 * startX,
startY,
radius,
circlePaint);
}
}
完整代码
public class MyEditText extends EditText {
private Context mContext;
private OnPayListener listener;
/**
* 最大输入位数
*/
private int maxCount = 6;
/**
* 第一个圆开始绘制的圆心坐标
*/
private float startX;
private float startY;
/**
* 实心圆的半径
*/
private int radius = 10;
/**
* view的高度
*/
private int height;
private int width;
/**
* 当前输入密码位数
*/
private int textLength = 0;
/**
* 圆的颜色 默认BLACK
*/
private int circleColor = Color.BLACK;
/**
* 分割线的颜色
*/
private int borderColor = Color.GRAY;
/**
* 分割线的画笔
*/
private Paint borderPaint;
/**
* 分割线开始的坐标x
*/
private int divideLineWStartX;
/**
* 分割线的宽度 默认2
*/
private int divideLineWidth = 0;
/**
* 竖直分割线的颜色
*/
private int divideLineColor = Color.GRAY;
private RectF rectF = new RectF();
/**
* 矩形边框的圆角
*/
private int rectAngle = 0;
/**
* 竖直分割线的画笔
*/
private Paint divideLinePaint;
/**
* 圆的画笔
*/
private Paint circlePaint;
public MyEditText(Context context, AttributeSet attrs) {
super(context, attrs);
mContext = context;
getAtt(attrs);
initPaint();
this.setCursorVisible(false);
this.setFilters(new InputFilter[]{new InputFilter.LengthFilter(maxCount)});
}
private void getAtt(AttributeSet attrs) {
TypedArray typedArray = mContext.obtainStyledAttributes(attrs, R.styleable.MyEditText);
maxCount = typedArray.getInt(R.styleable.MyEditText_maxCount, maxCount);
circleColor = typedArray.getColor(R.styleable.MyEditText_circleColor, circleColor);
radius = typedArray.getDimensionPixelOffset(R.styleable.MyEditText_radius, radius);
divideLineWidth = typedArray.getDimensionPixelSize(R.styleable.MyEditText_divideLineWidth, divideLineWidth);
divideLineColor = typedArray.getColor(R.styleable.MyEditText_divideLineColor, divideLineColor);
rectAngle = typedArray.getDimensionPixelOffset(R.styleable.MyEditText_rectAngle, rectAngle);
typedArray.recycle();
}
/**
* 初始化画笔
*/
private void initPaint() {
circlePaint = getPaint(5, Paint.Style.FILL, circleColor);
borderPaint = getPaint(3, Paint.Style.STROKE, borderColor);
divideLinePaint = getPaint(divideLineWidth, Paint.Style.STROKE,R.color.line );
// divideLinePaint = new Paint();
// divideLinePaint.setStrokeWidth(divideLineWidth);
// divideLinePaint.setStyle(Paint.Style.FILL);
// divideLinePaint.setColor(getResources().getColor(R.color.line));
// divideLinePaint.setAntiAlias(true);
}
/**
* 设置画笔
*
* @param strokeWidth 画笔宽度
* @param style 画笔风格
* @param color 画笔颜色
* @return
*/
private Paint getPaint(int strokeWidth, Paint.Style style, int color) {
Paint paint = new Paint(ANTI_ALIAS_FLAG);
paint.setStrokeWidth(strokeWidth);
paint.setStyle(style);
paint.setColor(color);
paint.setAntiAlias(true);
return paint;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
width = w;
height = h;
divideLineWStartX = w / maxCount;
startX = w / maxCount / 2;
startY = h / 2;
rectF.set(0, 0, width, height);
}
@Override
protected void onDraw(Canvas canvas) {
//super.onDraw(canvas);
drawWeChatBorder(canvas);
drawPsdCircle(canvas);
}
/**
* 画微信支付密码的样式
*
* @param canvas
*/
private void drawWeChatBorder(Canvas canvas) {
//canvas.drawRoundRect(rectF, rectAngle, rectAngle, borderPaint);
for (int i = 0; i < maxCount - 1; i++) {
canvas.drawLine((i + 1) * divideLineWStartX,
0,
(i + 1) * divideLineWStartX,
height,
divideLinePaint);
}
}
/**
* 画密码实心圆
*
* @param canvas
*/
private void drawPsdCircle(Canvas canvas) {
for (int i = 0; i < textLength; i++) {
canvas.drawCircle(startX + i * 2 * startX,
startY,
radius,
circlePaint);
}
}
@Override
protected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {
super.onTextChanged(text, start, lengthBefore, lengthAfter);
textLength = text.toString().length();
if (textLength == maxCount){
if (null != listener)listener.onGo(getPasswordString());
}
invalidate();
}
@Override
protected void onSelectionChanged(int selStart, int selEnd) {
super.onSelectionChanged(selStart, selEnd);
//保证光标始终在最后
if (selStart == selEnd) {
setSelection(getText().length());
}
}
public interface OnPayListener {
void onGo(String pas);
}
public void setListener(OnPayListener mlistener){
this.listener = mlistener;
}
/**
* 获取输入的密码
*
* @return
*/
public String getPasswordString() {
return getText().toString().trim();
}
}
attr文件
布局shape
csdn:http://download.csdn.net/download/qq_38367802/10172775
github:https://github.com/liuzhenhang/myview