看到网友：/jfperiodical/article/3527?ref=myread做的仿支付宝支付密码输入框，感觉挺适合初学自定义view的同仁练手的，自己敲了一下，并进行了改进！
1、添加了自定义属性
2、接口回调
这边直接上代码了：
values/attrs.xml文件：
<resources><declare-styleable name="PassWordEditText"><attr name="bound_line_color" format="color" /><attr name="parting_line_color" format="color" /><attr name="point_color" format="color" /></declare-styleable></resources>
自定义view：
/*** 固定密码长度输入框** @author 21778 . -11-09 11:34*/public class PassWordEditText extends EditText {private Paint mBoundPaint;//外边框画笔private Paint mLinePaint;//分割线画笔private Paint mPsdPointPaint;//密码画笔private int boundPaintColor;private int partLineColor;private int psdPointColor;private int mPasswordTextLength;//输入密码的长度private int mWidth;private int mHeight;private static final int psdLength = 6;//密码长度private static final int psdPointR = 16;//小圆点半径private OnTextEndListener onTextEndListener;public void setOnTextEndListener(OnTextEndListener onTextEndListener) {this.onTextEndListener = onTextEndListener;}public PassWordEditText(Context context) {this(context, null);}public PassWordEditText(Context context, AttributeSet attrs) {this(context, attrs, 0);}public PassWordEditText(Context context, AttributeSet attrs, int defStyleAttr) {super(context, attrs, defStyleAttr);TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.PassWordEditText);boundPaintColor = typedArray.getColor(R.styleable.PassWordEditText_bound_line_color, Color.WHITE);partLineColor = typedArray.getColor(R.styleable.PassWordEditText_parting_line_color, Color.GRAY);psdPointColor = typedArray.getColor(R.styleable.PassWordEditText_point_color, Color.BLACK);init();}private void init() {//设置获取焦点setFocusable(true);setFocusableInTouchMode(true);//移除自带光标setCursorVisible(false);mBoundPaint = new Paint();mBoundPaint.setStrokeWidth(8);mBoundPaint.setAntiAlias(true);mBoundPaint.setColor(boundPaintColor);//实心矩形为了覆盖编辑框原有的字符串，有兴趣的同仁可以设置为空心矩形试一下// mBoundPaint.setStyle(Paint.Style.STROKE);mBoundPaint.setStyle(Paint.Style.FILL);mLinePaint = new Paint();mLinePaint.setStrokeWidth(4);mLinePaint.setAntiAlias(true);mLinePaint.setColor(partLineColor);mPsdPointPaint = new Paint();mPsdPointPaint.setStrokeWidth(12);mPsdPointPaint.setAntiAlias(true);mPsdPointPaint.setColor(psdPointColor);}@Overrideprotected void onDraw(Canvas canvas) {super.onDraw(canvas);mWidth = getMeasuredWidth();mHeight = getMeasuredHeight();drawRoundRect(canvas);drawPsdLine(canvas);drawPsdPoints(canvas);}/*** 画圆角边框** @param canvas*/@TargetApi(Build.VERSION_CODES.LOLLIPOP)private void drawRoundRect(Canvas canvas) {canvas.drawRoundRect(0, 0, mWidth, mHeight, 12, 12, mBoundPaint);}/*** 画密码分割线** @param canvas*/private void drawPsdLine(Canvas canvas) {for (int i = 1; i < psdLength; i++) {float mX = mWidth * i / psdLength;canvas.drawLine(mX, 12, mX, mHeight - 12, mLinePaint);}}/*** 绘画密码点** @param canvas*/private void drawPsdPoints(Canvas canvas) {float cx, cy = mHeight / 2;float half = mWidth / psdLength;for (int i = 0; i < mPasswordTextLength; i++) {cx = half / 2 + half * i;canvas.drawCircle(cx, cy, psdPointR, mPsdPointPaint);}}@Overrideprotected void onTextChanged(CharSequence text, int start, int lengthBefore, int lengthAfter) {super.onTextChanged(text, start, lengthBefore, lengthAfter);mPasswordTextLength = text.toString().length();if (mPasswordTextLength == psdLength) {//这边可以做接口回调，或者用过eventBus的同仁们进行事件发布if (onTextEndListener != null) {onTextEndListener.onTextEndListener(text.toString());}return;}invalidate();}public interface OnTextEndListener {void onTextEndListener(String textString);}}
布局文件：
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="/apk/res/android" xmlns:cyj="/apk/res-auto"xmlns:tools="/tools"android:id="@+id/activity_main"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"android:paddingBottom="@dimen/activity_vertical_margin"android:paddingLeft="@dimen/activity_horizontal_margin"android:paddingRight="@dimen/activity_horizontal_margin"android:paddingTop="@dimen/activity_vertical_margin"tools:context="com.aomai.selfviews.MainActivity"><com.aomai.selfviews.views.PassWordEditTextandroid:id="@+id/pw_et"android:layout_width="match_parent"android:layout_height="45dp"cyj:bound_line_color="@android:color/white"cyj:parting_line_color="@android:color/holo_red_dark"cyj:point_color="@android:color/black" /></LinearLayout>
最后是效果图：
发一下牢骚：截gif图就是麻烦，要先截视频，然后在转gif！
