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1.密码输入框

attrs.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="PasswordEditText">
        <!-- 密码的个数 -->
        <attr name="passwordNumber" format="integer"/>
        <!-- 密码圆点的半径 -->
        <attr name="passwordRadius" format="dimension" />
        <!-- 密码圆点的颜色 -->
        <attr name="passwordColor" format="color" />
        <!-- 分割线的颜色 -->
        <attr name="divisionLineColor" format="color" />
        <!-- 分割线的大小 -->
        <attr name="divisionLineSize" format="color" />
        <!-- 背景边框的颜色 -->
        <attr name="bgColor" format="color" />
        <!-- 背景边框的大小 -->
        <attr name="bgSize" format="dimension" />
        <!-- 背景边框的圆角大小 -->
        <attr name="bgCorner" format="dimension"/>
    </declare-styleable>
</resources>

PasswordEditText

public class PasswordEditText extends EditText {
    // 画笔
    private Paint mPaint;
    // 一个密码所占的宽度
    private int mPasswordItemWidth;
    // 密码的个数默认为6位数
    private int mPasswordNumber = 6;
    // 背景边框颜色
    private int mBgColor = Color.parseColor("#d1d2d6");
    // 背景边框大小
    private int mBgSize = 1;
    // 背景边框圆角大小
    private int mBgCorner = 0;
    // 分割线的颜色
    private int mDivisionLineColor = mBgColor;
    // 分割线的大小
    private int mDivisionLineSize = 1;
    // 密码圆点的颜色
    private int mPasswordColor = mDivisionLineColor;
    // 密码圆点的半径大小
    private int mPasswordRadius = 4;
    private PasswordFullListener mListener;

    public PasswordEditText(Context context) {
        this(context, null);
    }

    public PasswordEditText(Context context, AttributeSet attrs) {
        super(context, attrs);
        initPaint();
        initAttributeSet(context, attrs);
        // 设置输入模式是密码
        setInputType(EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
        // 不显示光标
        setCursorVisible(false);
    }

    /**
     * 初始化属性
     */
    private void initAttributeSet(Context context, AttributeSet attrs) {
        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.PasswordEditText);
        // 获取大小
        mDivisionLineSize = (int) array.getDimension(R.styleable.PasswordEditText_divisionLineSize, dip2px(mDivisionLineSize));
        mPasswordRadius = (int) array.getDimension(R.styleable.PasswordEditText_passwordRadius, dip2px(mPasswordRadius));
        mBgSize = (int) array.getDimension(R.styleable.PasswordEditText_bgSize, dip2px(mBgSize));
        mBgCorner = (int) array.getDimension(R.styleable.PasswordEditText_bgCorner, 0);
        // 获取颜色
        mBgColor = array.getColor(R.styleable.PasswordEditText_bgColor, mBgColor);
        mDivisionLineColor = array.getColor(R.styleable.PasswordEditText_divisionLineColor, mDivisionLineColor);
        mPasswordColor = array.getColor(R.styleable.PasswordEditText_passwordColor, mDivisionLineColor);
        array.recycle();
    }

    /**
     * 初始化画笔
     */
    private void initPaint() {
        mPaint = new Paint();
        mPaint.setAntiAlias(true);
        mPaint.setDither(true);
    }

    /**
     * dip 转 px
     */
    private int dip2px(int dip) {
        return (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP,
                dip, getResources().getDisplayMetrics());
    }

    @Override
    protected void onDraw(Canvas canvas) {
        int passwordWidth = getWidth() - (mPasswordNumber - 1) * mDivisionLineSize;
        mPasswordItemWidth = passwordWidth / mPasswordNumber;
        // 绘制背景
        drawBg(canvas);
        // 绘制分割线
        drawDivisionLine(canvas);
        // 绘制密码
        drawHidePassword(canvas);
    }

    /**
     * 绘制背景
     */
    private void drawBg(Canvas canvas) {
        mPaint.setColor(mBgColor);
        // 设置画笔为空心
        mPaint.setStyle(Paint.Style.STROKE);
        mPaint.setStrokeWidth(mBgSize);
        RectF rectF = new RectF(mBgSize, mBgSize, getWidth() - mBgSize, getHeight() - mBgSize);
        // 如果没有设置圆角，就画矩形
        if (mBgCorner == 0) {
            canvas.drawRect(rectF, mPaint);
        } else {
            // 如果有设置圆角就画圆矩形
            canvas.drawRoundRect(rectF, mBgCorner, mBgCorner, mPaint);
        }
    }

    /**
     * 绘制隐藏的密码
     */
    private void drawHidePassword(Canvas canvas) {
        int passwordLength = getText().length();
        mPaint.setColor(mPasswordColor);
        // 设置画笔为实心
        mPaint.setStyle(Paint.Style.FILL);
        for (int i = 0; i < passwordLength; i++) {
            int cx = i * mDivisionLineSize + i * mPasswordItemWidth + mPasswordItemWidth / 2 + mBgSize;
            canvas.drawCircle(cx, getHeight() / 2, mPasswordRadius, mPaint);
        }
        // 判断密码是否填充完毕
        if (passwordLength >= mPasswordNumber) {
            // 代表密码已经填充满了
            if (mListener != null) {
                mListener.passwordFull(getText().toString().trim());
            }
        }
    }

    /**
     * 绘制分割线
     */
    private void drawDivisionLine(Canvas canvas) {
        mPaint.setStrokeWidth(mDivisionLineSize);
        mPaint.setColor(mDivisionLineColor);
        for (int i = 0; i < mPasswordNumber - 1; i++) {
            int startX = (i + 1) * mDivisionLineSize + (i + 1) * mPasswordItemWidth + mBgSize;
            canvas.drawLine(startX, mBgSize, startX, getHeight() - mBgSize, mPaint);
        }
    }

    /**
     * 添加密码
     */
    public void addPassword(String number) {
        number = getText().toString().trim() + number;
        if (number.length() > mPasswordNumber) {
            return;
        }
        setText(number);
    }

    /**
     * 删除最后一位密码
     */
    public void deleteLastPassword() {
        String currentText = getText().toString().trim();
        if (TextUtils.isEmpty(currentText)) {
            return;
        }
        currentText = currentText.substring(0, currentText.length() - 1);
        setText(currentText);
    }

    /**
     * 设置密码填充满的监听
     */
    public void setOnPasswordFullListener(PasswordFullListener listener) {
        this.mListener = listener;
    }

    /**
     * 密码已经全部填满
     */
    public interface PasswordFullListener {
        public void passwordFull(String password);
    }
}

 目前的效果就是点击之后会弹出系统的键盘，实现了基本的效果，接下来我们再加入监听也就说当密码输入完成我们需要回调监听。 
　 
　这里写图片描述

2.自定义键盘：

ui_customer_keyboard.xml：

  1 <?xml version="1.0" encoding="utf-8"?>
  2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3     android:id="@+id/activity_main"
  4     android:layout_width="match_parent"
  5     android:layout_height="wrap_content"
  6     android:background="#EBEBEB"
  7     android:orientation="vertical">
  8 
  9     <LinearLayout
 10         android:layout_width="match_parent"
 11         android:layout_height="wrap_content">
 12 
 13         <TextView
 14             android:layout_width="0dp"
 15             android:layout_height="wrap_content"
 16             android:layout_marginRight="1dp"
 17             android:layout_weight="1"
 18             android:background="#FFFFFF"
 19             android:gravity="center"
 20             android:padding="20dp"
 21             android:text="1" />
 22 
 23         <TextView
 24             android:layout_width="0dp"
 25             android:layout_height="wrap_content"
 26             android:layout_marginRight="1dp"
 27             android:layout_weight="1"
 28             android:background="#FFFFFF"
 29             android:gravity="center"
 30             android:padding="20dp"
 31             android:text="2" />
 32 
 33         <TextView
 34             android:layout_width="0dp"
 35             android:layout_height="wrap_content"
 36             android:layout_weight="1"
 37             android:background="#FFFFFF"
 38             android:gravity="center"
 39             android:padding="20dp"
 40             android:text="3" />
 41     </LinearLayout>
 42 
 43     <LinearLayout
 44         android:layout_width="match_parent"
 45         android:layout_height="wrap_content"
 46         android:layout_marginTop="1dp">
 47 
 48         <TextView
 49             android:layout_width="0dp"
 50             android:layout_height="wrap_content"
 51             android:layout_marginRight="1dp"
 52             android:layout_weight="1"
 53             android:background="#FFFFFF"
 54             android:gravity="center"
 55             android:padding="20dp"
 56             android:text="4" />
 57 
 58         <TextView
 59             android:layout_width="0dp"
 60             android:layout_height="wrap_content"
 61             android:layout_marginRight="1dp"
 62             android:layout_weight="1"
 63             android:background="#FFFFFF"
 64             android:gravity="center"
 65             android:padding="20dp"
 66             android:text="5" />
 67 
 68         <TextView
 69             android:layout_width="0dp"
 70             android:layout_height="wrap_content"
 71             android:layout_weight="1"
 72             android:background="#FFFFFF"
 73             android:gravity="center"
 74             android:padding="20dp"
 75             android:text="6" />
 76     </LinearLayout>
 77 
 78     <LinearLayout
 79         android:layout_width="match_parent"
 80         android:layout_height="wrap_content"
 81         android:layout_marginTop="1dp">
 82 
 83         <TextView
 84             android:layout_width="0dp"
 85             android:layout_height="wrap_content"
 86             android:layout_marginRight="1dp"
 87             android:layout_weight="1"
 88             android:background="#FFFFFF"
 89             android:gravity="center"
 90             android:padding="20dp"
 91             android:text="7" />
 92 
 93         <TextView
 94             android:layout_width="0dp"
 95             android:layout_height="wrap_content"
 96             android:layout_marginRight="1dp"
 97             android:layout_weight="1"
 98             android:background="#FFFFFF"
 99             android:gravity="center"
100             android:padding="20dp"
101             android:text="8" />
102 
103         <TextView
104             android:layout_width="0dp"
105             android:layout_height="wrap_content"
106             android:layout_weight="1"
107             android:background="#FFFFFF"
108             android:gravity="center"
109             android:padding="20dp"
110             android:text="9" />
111 
112     </LinearLayout>
113 
114     <LinearLayout
115         android:layout_width="match_parent"
116         android:layout_height="wrap_content"
117         android:layout_marginTop="1dp"
118         android:orientation="horizontal">
119 
120         <TextView
121             android:layout_width="0dp"
122             android:layout_height="wrap_content"
123             android:layout_marginRight="1dp"
124             android:layout_weight="1"
125             android:gravity="center"
126             android:padding="20dp" />
127 
128         <TextView
129             android:layout_width="0dp"
130             android:layout_height="wrap_content"
131             android:layout_marginRight="1dp"
132             android:layout_weight="1"
133             android:background="#FFFFFF"
134             android:gravity="center"
135             android:padding="20dp"
136             android:text="0" />
137 
138         <ImageView
139             android:layout_width="0dp"
140             android:layout_height="wrap_content"
141             android:layout_weight="1"
142             android:gravity="center"
143             android:padding="15dp"
144             android:layout_gravity="center_vertical"
145             android:src="@drawable/customer_password_keyboard_delete" />
146     </LinearLayout>
147 </LinearLayout>
View Code

CustomerKeyboard.java：

 1 public class CustomerKeyboard extends LinearLayout implements View.OnClickListener {
 2     private CustomerKeyboardClickListener mListener;
 3 
 4     public CustomerKeyboard(Context context) {
 5         this(context, null);
 6     }
 7 
 8     public CustomerKeyboard(Context context, AttributeSet attrs) {
 9         this(context, attrs, 0);
10     }
11 
12     public CustomerKeyboard(Context context, AttributeSet attrs, int defStyleAttr) {
13         super(context, attrs, defStyleAttr);
14         inflate(context, R.layout.ui_customer_keyboard, this);
15         setChildViewOnclick(this);
16     }
17 
18     /**
19      * 设置键盘子View的点击事件
20      */
21     private void setChildViewOnclick(ViewGroup parent) {
22         int childCount = parent.getChildCount();
23         for (int i = 0; i < childCount; i++) {
24             // 不断的递归设置点击事件
25             View view = parent.getChildAt(i);
26             if (view instanceof ViewGroup) {
27                 setChildViewOnclick((ViewGroup) view);
28                 continue;
29             }
30             view.setOnClickListener(this);
31         }
32     }
33 
34     @Override
35     public void onClick(View v) {
36         View clickView = v;
37         if (clickView instanceof TextView) {
38             // 如果点击的是TextView
39             String number = ((TextView) clickView).getText().toString();
40             if (!TextUtils.isEmpty(number)) {
41                 if (mListener != null) {
42                     // 回调
43                     mListener.click(number);
44                 }
45             }
46         } else if (clickView instanceof ImageView) {
47             // 如果是图片那肯定点击的是删除
48             if (mListener != null) {
49                 mListener.delete();
50             }
51         }
52     }
53 
54     /**
55      * 设置键盘的点击回调监听
56      */
57     public void setOnCustomerKeyboardClickListener(CustomerKeyboardClickListener listener) {
58         this.mListener = listener;
59     }
60 
61     /**
62      * 点击键盘的回调监听
63      */
64     public interface CustomerKeyboardClickListener {
65         public void click(String number);
66         public void delete();
67     }
68 }

3.最后的测试

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:background="#f7f7f7"
    android:orientation="vertical">

    <com.hc.passwordedittext.PasswordEditText
        android:id="@+id/password_edit_text"
        android:layout_width="match_parent"
        android:layout_marginTop="23dp"
        android:layout_marginRight="45dp"
        android:background="@null"
        android:padding="10dp"
        app:bgCorner="3dp"
        android:layout_marginLeft="45dp"
        android:layout_height="wrap_content" />


    <com.hc.passwordedittext.CustomerKeyboard
        android:id="@+id/custom_key_board"
        android:layout_marginTop="23dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>
</LinearLayout>

MainActivity.java

 1 public class MainActivity extends Activity implements CustomerKeyboard.CustomerKeyboardClickListener,
 2         PasswordEditText.PasswordFullListener{
 3 
 4     private CustomerKeyboard mCustomerKeyboard;
 5     private PasswordEditText mPasswordEditText;
 6 
 7     @Override
 8     protected void onCreate(Bundle savedInstanceState) {
 9         super.onCreate(savedInstanceState);
10         setContentView(R.layout.activity_main);
11         mPasswordEditText = (PasswordEditText) findViewById(R.id.password_et);
12         mCustomerKeyboard = (CustomerKeyboard) findViewById(R.id.custom_key_board);
13         // 设置监听
14         mCustomerKeyboard.setOnCustomerKeyboardClickListener(this);
15         mPasswordEditText.setOnPasswordFullListener(this);
16     }
17 
18     /**
19      * 键盘数字点击监听回调方法
20      */
21     @Override
22     public void click(String number) {
23         mPasswordEditText.addPassword(number);
24     }
25 
26     /**
27      * 键盘删除点击监听回调方法
28      */
29     @Override
30     public void delete() {
31         mPasswordEditText.deleteLastPassword();
32     }
33 
34     /**
35      * 密码输入完毕回调方法
36      */
37     @Override
38     public void passwordFull(String password) {
39         Toast.makeText(this, "密码填充完毕：" + password, Toast.LENGTH_SHORT).show();
40     }
41 }

 这里写图片描述

https://github.com/HCDarren/PasswordEditText

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原文地址：https://www.cnblogs.com/ganchuanpu/p/8144222.html