Android EditText方框验证码 短信验证码的实现

package com.loaderman.securitycodedemo;

import android.graphics.Color;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity implements SecurityCodeView.InputCompleteListener {

    private SecurityCodeView editText;
    private TextView text;

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

        findViews();
        setListener();
    }

    private void setListener() {
        editText.setInputCompleteListener(this);
    }

    private void findViews() {
        editText = (SecurityCodeView) findViewById(R.id.scv_edittext);
        text = (TextView) findViewById(R.id.tv_text);
    }

    @Override
    public void inputComplete() {
        Toast.makeText(getApplicationContext(), "验证码是：" + editText.getEditContent(), Toast.LENGTH_LONG).show();
        if (!editText.getEditContent().equals("1234")) {
            text.setText("验证码输入错误");
            text.setTextColor(Color.RED);
        }
    }

    @Override
    public void deleteContent(boolean isDelete) {
        if (isDelete){
            text.setText("输入验证码表示同意《用户协议》");
            text.setTextColor(Color.BLACK);
        }
    }
}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    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:background="@mipmap/bg_view1"
    tools:context="com.xiaviv.securitycodedemo.MainActivity">

    <com.loaderman.securitycodedemo.SecurityCodeView
        android:id="@+id/scv_edittext"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginTop="20dp" />

    <TextView
        android:id="@+id/tv_text"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginLeft="20dp"
        android:layout_marginRight="20dp"
        android:layout_marginTop="10dp"
        android:layout_weight="4"
        android:text="输入验证码表示同意《用户协议》" />
</LinearLayout>

import android.content.Context;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.AttributeSet;
import android.view.KeyEvent;
import android.view.View;
import android.widget.EditText;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class SecurityCodeView extends RelativeLayout {
    private EditText editText;
    private TextView[] TextViews;
    private StringBuffer stringBuffer = new StringBuffer();
    private int count = 4;
    private String inputContent;

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

    public SecurityCodeView(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public SecurityCodeView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        TextViews = new TextView[4];
        View.inflate(context, R.layout.view_security_code, this);

        editText = (EditText) findViewById(R.id.item_edittext);
        TextViews[0] = (TextView) findViewById(R.id.item_code_iv1);
        TextViews[1] = (TextView) findViewById(R.id.item_code_iv2);
        TextViews[2] = (TextView) findViewById(R.id.item_code_iv3);
        TextViews[3] = (TextView) findViewById(R.id.item_code_iv4);

        editText.setCursorVisible(false);//将光标隐藏
        setListener();
    }

    private void setListener() {
        editText.addTextChangedListener(new TextWatcher() {

            @Override
            public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

            }

            @Override
            public void afterTextChanged(Editable editable) {
                //重点   如果字符不为""时才进行操作
                if (!editable.toString().equals("")) {
                    if (stringBuffer.length() > 3) {
                        //当文本长度大于3位时edittext置空
                        editText.setText("");
                        return;
                    } else {
                        //将文字添加到StringBuffer中
                        stringBuffer.append(editable);
                        editText.setText("");//添加后将EditText置空  造成没有文字输入的错局
                        //  Log.e("TAG", "afterTextChanged: stringBuffer is " + stringBuffer);
                        count = stringBuffer.length();//记录stringbuffer的长度
                        inputContent = stringBuffer.toString();
                        if (stringBuffer.length() == 4) {
                            //文字长度位4  则调用完成输入的监听
                            if (inputCompleteListener != null) {
                                inputCompleteListener.inputComplete();
                            }
                        }
                    }

                    for (int i = 0; i < stringBuffer.length(); i++) {
                        TextViews[i].setText(String.valueOf(inputContent.charAt(i)));
                        TextViews[i].setBackgroundResource(R.mipmap.bg_verify_press);
                    }

                }
            }
        });

        editText.setOnKeyListener(new OnKeyListener() {
            @Override
            public boolean onKey(View v, int keyCode, KeyEvent event) {
                if (keyCode == KeyEvent.KEYCODE_DEL
                        && event.getAction() == KeyEvent.ACTION_DOWN) {
                    if (onKeyDelete()) return true;
                    return true;
                }
                return false;
            }
        });
    }

    public boolean onKeyDelete() {
        if (count == 0) {
            count = 4;
            return true;
        }
        if (stringBuffer.length() > 0) {
            //删除相应位置的字符
            stringBuffer.delete((count - 1), count);
            count--;
            //   Log.e(TAG, "afterTextChanged: stringBuffer is " + stringBuffer);
            inputContent = stringBuffer.toString();
            TextViews[stringBuffer.length()].setText("");
            TextViews[stringBuffer.length()].setBackgroundResource(R.mipmap.bg_verify);
            if (inputCompleteListener != null)
                inputCompleteListener.deleteContent(true);//有删除就通知manger

        }
        return false;
    }

    /**
     * 清空输入内容
     */
    public void clearEditText() {
        stringBuffer.delete(0, stringBuffer.length());
        inputContent = stringBuffer.toString();
        for (int i = 0; i < TextViews.length; i++) {
            TextViews[i].setText("");
            TextViews[i].setBackgroundResource(R.mipmap.bg_verify);
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        return super.onKeyDown(keyCode, event);
    }

    private InputCompleteListener inputCompleteListener;

    public void setInputCompleteListener(InputCompleteListener inputCompleteListener) {
        this.inputCompleteListener = inputCompleteListener;
    }

    public interface InputCompleteListener {
        void inputComplete();

        void deleteContent(boolean isDelete);
    }

    /**
     * 获取输入文本
     *
     * @return
     */
    public String getEditContent() {
        return inputContent;
    }

}

view_security_code.xml

<?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="wrap_content">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="47dp"
        android:gravity="center"
        android:orientation="horizontal"
        android:weightSum="3">

        <TextView
            android:id="@+id/item_code_iv1"
            style="@style/text_editStyle" />

        <View
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" />

        <TextView
            android:id="@+id/item_code_iv2"
            style="@style/text_editStyle" />

        <View
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" />

        <TextView
            android:id="@+id/item_code_iv3"
            style="@style/text_editStyle" />

        <View
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_weight="1" />

        <TextView
            android:id="@+id/item_code_iv4"
            style="@style/text_editStyle" />

    </LinearLayout>

    <EditText
        android:id="@+id/item_edittext"
        android:layout_width="match_parent"
        android:layout_height="46dp"
        android:background="@android:color/transparent"
        android:inputType="number" />
</RelativeLayout>

style.xml中

<style name="text_editStyle" >
        <item name="android:layout_height">47dp</item>
        <item name="android:layout_width">47dp</item>
        <item name="android:background">@mipmap/bg_verify</item>
        <item name="android:gravity">center</item>
        <item name="android:textColor">@color/common_blue_0090FF</item>
        <item name="android:textSize">18sp</item>

    </style>

效果图:

---

本文学习来源:http://www.jianshu.com/p/88d30b1d85df

---