自定义密码输入框,无圆角

      点击按钮,显示一个自定义的密码输入框.点击输入框,调用系统键盘,密码输入完后,拿到密码做相应的逻辑

布局文件

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFFFFF"
    android:gravity="center_vertical">

    <LinearLayout  android:id="@+id/linear_pass"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical">

        <RelativeLayout  android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_margin="5dp">

            <!-- 取消按钮 -->

            <ImageView  android:id="@+id/img_cancel"
                android:layout_width="20sp"
                android:layout_height="20sp"
                android:layout_centerVertical="true"
                android:background="@drawable/delete" />

            <TextView  android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_centerInParent="true"
                android:text="输入密码"
                android:textColor="#898181"
                android:textSize="20sp" />
        </RelativeLayout>

        <View  android:layout_width="match_parent"
            android:layout_height="0.5dp"
            android:background="#555555" />

        <!-- 6位密码框布局，需要一个圆角边框的shape作为layout的背景 -->

        <!--<RelativeLayout-->
            <!--android:layout_width="match_parent"-->
            <!--android:layout_height="wrap_content"-->
            <!--android:layout_marginTop="50dp">-->

            <com.example.administrator.pwd.PwdEditText  android:id="@+id/pwd"
                android:layout_width="550px"
                android:layout_height="wrap_content"
                android:layout_marginTop="50dp"
                android:layout_gravity="center_horizontal"
                android:layout_centerHorizontal="true"
                android:inputType="numberPassword" />

        <!--</RelativeLayout>-->

        <!-- 忘记密码链接 -->

        <TextView  android:id="@+id/tv_forgetPwd"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_gravity="right"
            android:layout_margin="15dp"
            android:text="忘记密码？"
            android:textColor="#354EEF" />
    </LinearLayout>


</RelativeLayout>

自定义的密码输入框工具类

package com.example.administrator.pwd;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.util.Log;
import android.view.animation.Animation;
import android.view.animation.CycleInterpolator;
import android.view.animation.TranslateAnimation;
import android.widget.EditText;

/**
 * 自定义支付密码输入框
 * Created by Administrator on 2016/12/27 0027.
 */
public class PwdEditText extends EditText {
    /**
     * 间隔
     */
    private final int PWD_SPACING = 0;
    /**
     * 密码大小
     */
    private final int PWD_SIZE = 15;
    /**
     * 密码长度
     */
    private final int PWD_LENGTH = 6;
    /**
     * 上下文
     */
    private Context mContext;
    /**
     * 宽度
     */
    private int mWidth;
    /**
     * 高度
     */
    private int mHeight;
    /**
     * 密码框
     */
    private Rect mRect;

    /**
     * 密码画笔
     */
    private Paint mPwdPaint;

    /**
     * 密码框画笔
     */
    private Paint mRectPaint;
    /**
     * 输入的密码长度
     */
    private int mInputLength;

    /**
     * 输入结束监听
     */
    private OnInputFinishListener mOnInputFinishListener;

    /**
     * 构造方法
     *
     * @param context
     * @param attrs
     */
    public PwdEditText(Context context, AttributeSet attrs) {
        super(context, attrs);

        // 初始化密码画笔
        mPwdPaint = new Paint();
        mPwdPaint.setColor(Color.BLACK);//输入密码的颜色，画笔颜色
        mPwdPaint.setStyle(Paint.Style.FILL);//画笔类型   ，fill为实心
        mPwdPaint.setAntiAlias(true);//消除密码圆点锯齿，但实际效果没有太大变化
        // 初始化密码框
        mRectPaint = new Paint();
        mRectPaint.setStyle(Paint.Style.STROKE);//画笔类型   ，fill为空心
        mRectPaint.setColor(Color.GRAY);//密码框的颜色
        mRectPaint.setAntiAlias(true);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        mWidth = getWidth();
        mHeight = getHeight();

        // 这三行代码非常关键，大家可以注释点在看看效果
        Paint paint = new Paint();
        paint.setColor(Color.WHITE);//整个区域内的颜色会发生改变
        canvas.drawRect(0, 0, mWidth, mHeight, paint);

        // 计算每个密码框宽度
        int rectWidth = (mWidth - PWD_SPACING * (PWD_LENGTH - 1)) / PWD_LENGTH;
        // 绘制密码框
        for (int i = 0; i < PWD_LENGTH; i++) {
            int left = (rectWidth + PWD_SPACING) * i;//距离左边的高度。就好像xml界面布局中paddleft一样
            int top =2;//距离上边的高度。就好像xml界面布局中paddTop一样
            int right = left + rectWidth;//距离右边的高度。就好像xml界面布局中paddright一样
            int bottom = mHeight - top;//距离下边的高度。就好像xml界面布局中paddbottom一样
            mRect = new Rect(left, top, right, bottom);
            canvas.drawRect(mRect, mRectPaint);
        }



        // 绘制密码
        for (int i = 0; i < mInputLength; i++) {
            int cx = rectWidth / 2 + (rectWidth + PWD_SPACING) * i;//密码圆点到密码框内的距离   除以2相当于有xml中的center居中效果
            int cy = mHeight / 2;
            canvas.drawCircle(cx, cy, PWD_SIZE, mPwdPaint);

        }
    }
        //关键部分     此类在被别的类调用时    会直接将输入的内容返回到调用者去     ，重写了onTextChanged方法
    @Override
    protected void onTextChanged(CharSequence text, int start,
                                 int lengthBefore, int lengthAfter) {
        super.onTextChanged(text, start, lengthBefore, lengthAfter);
        this.mInputLength = text.toString().length();
        invalidate();
        /**
         * 如果输入长度等于密码长度   输入结束接听不为空
         */
        if (mInputLength == PWD_LENGTH && mOnInputFinishListener != null) {
            mOnInputFinishListener.onInputFinish(text.toString());
            Log.d("*****************",text.toString());   //text就是输入的字符    ，通过toString转换为字符串
        }
    }

    public interface OnInputFinishListener {
        /**
         * 密码输入结束监听
         *
         * @param password
         */
        void onInputFinish(String password);
    }

    /**
     * 设置输入完成监听，此方法被activity来调用
     *
     * @param onInputFinishListener
     */
    public void setOnInputFinishListener(
            OnInputFinishListener onInputFinishListener) {
        this.mOnInputFinishListener = onInputFinishListener;
    }

    /**
     * 设置晃动动画
     */
    public void setShakeAnimation() {
        this.startAnimation(shakeAnimation(5));
    }

    /**
     * 晃动动画
     *
     * @param counts
     *          1秒钟晃动多少下
     * @return
     */
    public static Animation shakeAnimation(int counts) {
        Animation translateAnimation = new TranslateAnimation(0, 10, 0, 0);
        //设置一个循环加速器，使用传入的次数就会出现摆动的效果。
        translateAnimation.setInterpolator(new CycleInterpolator(counts));
        translateAnimation.setDuration(500);
        return translateAnimation;
    }

}

Mainactivity实现一个按钮,点击

package com.example.administrator.pwd;

import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.drawable.BitmapDrawable;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.Toast;

/**
 * Created by Administrator on 2017/2/14 0014.
 */
public class MineDiaog extends Dialog implements DialogInterface {

    private final Context context;
    private PwdEditText bb;
    private View mDialogView;
    private PwdEditText pwd;

    public MineDiaog(Context context) {
        super(context);
        this.context = context;
    }

    public MineDiaog(Context context, int themeResId, Context context1) {
        super(context, themeResId);
        this.context = context1;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //对dialog的范围进行规范
        WindowManager.LayoutParams params = getWindow().getAttributes();
        getWindow().setBackgroundDrawable(new BitmapDrawable());
        params.height = ViewGroup.LayoutParams.WRAP_CONTENT;
        params.width = ViewGroup.LayoutParams.WRAP_CONTENT;
        getWindow().setAttributes(params);

        mDialogView = ViewGroup.inflate(context, R.layout.dialog, null);
        pwd = (PwdEditText) mDialogView.findViewById(R.id.pwd);
        setContentView(mDialogView);

        pwd.setOnInputFinishListener(new PwdEditText.OnInputFinishListener() {
            @Override
            public void onInputFinish(String password) {
                Toast.makeText(context,"输入结束" + pwd.getText().toString(),Toast.LENGTH_SHORT).show();
                pwd.setText(null);
            }
        });

    }
}

MAinActivity

package com.example.administrator.pwd;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.RelativeLayout;

import im.quar.autolayout.AutoLayoutActivity;

public class MainActivity extends AutoLayoutActivity {

    private RelativeLayout bb;
    private PwdEditText pwd;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        button = (Button) findViewById(R.id.button);

        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                MineDiaog mineDiaog = new MineDiaog(MainActivity.this);
                mineDiaog.show();
            }
        });
    }
}