Android 仿支付宝支付密码输入框

看到网友：http://www.jointforce.com/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 . 2016-11-09 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);

}

@Override
protected 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);
}
}

@Override
protected 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="http://schemas.android.com/apk/res/android"
xmlns:cyj="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/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.PassWordEditText
android: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！