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Android 自定義密碼輸入框?qū)崿F(xiàn)代碼

 更新時(shí)間：2018年03月12日 11:01:09   作者：cgrass  
最近做個(gè)項(xiàng)目自定義密碼輸入框功能，下面小編把實(shí)現(xiàn)思路分享到腳本之家平臺(tái)，需要的朋友參考下吧

效果

自定義密碼輸入框，項(xiàng)目的一個(gè)界面需求，我把這個(gè)自定義的輸入框提取出來(lái)作為這次內(nèi)容的題目。

輸入前:

 

輸入后：

 

輸入1個(gè)字符就紅一個(gè)圈圈，很簡(jiǎn)單的效果。

思路

1.自定義EditText。

2.背景為一個(gè)外圓環(huán)加內(nèi)實(shí)心圓。

3.edittext的長(zhǎng)度變化時(shí)候重新繪制背景或者紅色環(huán)位置。

關(guān)鍵代碼

代碼其實(shí)也很簡(jiǎn)單，順手拿資源的請(qǐng)到文末。

1.畫背景

/**
   * 繪制背景外圓
   */
  private void drawOutRing(Canvas canvas) {
    mPaint.setColor(mBgColor);
    // 設(shè)置畫筆為空心
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeWidth(mBgSize);
    RectF rectF = new RectF(mBgSize, mBgSize, getWidth() - mBgSize, getHeight() - mBgSize);
    // 畫圓
    for (int i = 0; i < mPasswordNumber; i++) {
      int cx = i * mDivisionLineSize + i * mPasswordItemWidth + mPasswordItemWidth / 2 + mBgSize;
      canvas.drawCircle(cx, getHeight() / 2, mOutRadius, mPaint);
    }
  }

2.畫實(shí)心內(nèi)圓背景

/**
   * 繪制背景內(nèi)圓
   */
  private void drawInRing(Canvas canvas) {
    mPaint.setColor(mDivisionLineColor);
    // 設(shè)置畫筆為實(shí)心
    mPaint.setStyle(Paint.Style.FILL);
    // 畫圈圈
    for (int i = 0; i < mPasswordNumber; i++) {
      int cx = i * mDivisionLineSize + i * mPasswordItemWidth + mPasswordItemWidth / 2 + mBgSize;
      canvas.drawCircle(cx, getHeight() / 2, mPasswordRadius, mPaint);
    }
  }
}

3.繪制輸入密碼的變化動(dòng)作

/**
   * 繪制隱藏的密碼
   */
  private void drawHidePassword(Canvas canvas) {
    int passwordLength = getText().length();
    if (passwordLength > 6) passwordLength = 6;
    mPaint.setColor(mPasswordColor);
    // 畫實(shí)心內(nèi)圓
    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);
    }
    //外圓顏色
    mPaint.setColor(mPasswordColor);
    // 設(shè)置畫筆為空心
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeWidth(mBgSize);
    RectF rectF = new RectF(mBgSize, mBgSize, getWidth() - mBgSize, getHeight() - mBgSize);
    // 畫空心外圓
    for (int i = 0; i < passwordLength; i++) {
      int cx = i * mDivisionLineSize + i * mPasswordItemWidth + mPasswordItemWidth / 2 + mBgSize;
      canvas.drawCircle(cx, getHeight() / 2, mOutRadius, mPaint);
    }
  }

4.重寫onDraw

int passwordWidth = getWidth() - (mPasswordNumber - 1) * mDivisionLineSize;
    mPasswordItemWidth = passwordWidth / mPasswordNumber;
    // 繪制背景外圓
    drawOutRing(canvas);
    // 繪制背景內(nèi)圓
    drawInRing(canvas);
    // 繪制密碼
    drawHidePassword(canvas);

5.xml引用

<com***.PasswordView
    android:id="@+id/password"
    android:layout_width="240dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginTop="10dp"
    android:background="@null">
  </com***.PasswordView>

6.還可以設(shè)置些屬性

在sytle中設(shè)置，通過(guò)xml中的app：xxx引用。

<com.*.PasswordView
    android:id="@+id/password"
    android:layout_width="240dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_marginTop="10dp"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    app:bgColor="#ffffff"
    android:background="@null">
  </com.*.PasswordView>

完整代碼

一些樣式，我設(shè)置了，結(jié)果直接沒(méi)用上

<declare-styleable name="PasswordView">
    <!-- 密碼的個(gè)數(shù) -->
    <attr name="passwordNumber" format="integer"/>
    <!-- 密碼圓點(diǎn)的半徑 -->
    <attr name="passwordRadius" format="dimension"/>
    <!-- 密碼圓點(diǎn)的顏色 -->
    <attr name="passwordColor" format="color"/>
    <!-- 外圈顏色 -->
    <attr name="outRingColor" format="color"/>
    <!-- 外圓線條大小 -->
    <attr name="outRingLineSize" format="color"/>
    <!-- 背景邊框的顏色 -->
    <attr name="bgColor" format="color"/>
    <!-- 背景邊框的大小 -->
    <attr name="bgSize" format="dimension"/>
    <!-- 背景邊框的圓角大小 -->
    <attr name="bgCorner" format="dimension"/>
  </declare-styleable>

自定義Edittext

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.RectF;
import android.util.AttributeSet;
import android.util.TypedValue;
import android.view.inputmethod.EditorInfo;
import android.widget.EditText;
/**
 *自定義密碼輸入框
 */
public class PasswordView extends EditText {
  // 畫筆
  private Paint mPaint;
  // 一個(gè)密碼所占的寬度
  private int mPasswordItemWidth;
  // 密碼的個(gè)數(shù)默認(rèn)為6位數(shù)
  private int mPasswordNumber = 6;
  // 背景圓顏色
  private int mBgColor = Color.parseColor("#d1d2d6");
  // 背景大小
  private int mBgSize = 1;
  // 背景邊框圓角大小
  private int mBgCorner = 0;
  // 外圓的顏色
  private int outRingLineColor = mBgColor;
  // 外圓線條的大小
  private int outRingLineSize = 1;
  // 密碼輸入的顏色
  private int mPasswordColor = Color.parseColor("#cb3435");
   // 密碼圓點(diǎn)的半徑大小
  private int mPasswordRadius = 6;
  // 外圓半徑大小
  private int mOutRadius = 25;
  public PasswordView(Context context) {
    this(context, null);
  }
  public PasswordView(Context context, AttributeSet attrs) {
    super(context, attrs);
    initPaint();
    initAttributeSet(context, attrs);
    // 設(shè)置輸入模式是密碼
    setInputType(EditorInfo.TYPE_TEXT_VARIATION_PASSWORD);
    // 不顯示光標(biāo)
    setCursorVisible(false);
  }
  /**
   * 初始化屬性
   */
  private void initAttributeSet(Context context, AttributeSet attrs) {
    TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.PasswordView);
    // 獲取大小
    outRingLineSize = (int) array.getDimension(R.styleable.PasswordView_outRingLineSize, dip2px(outRingLineSize));
    mPasswordRadius = (int) array.getDimension(R.styleable.PasswordView_passwordRadius, dip2px(mPasswordRadius));
    mBgSize = (int) array.getDimension(R.styleable.PasswordView_bgSize, dip2px(mBgSize));
    mBgCorner = (int) array.getDimension(R.styleable.PasswordView_bgCorner, 0);
    // 獲取顏色
    mBgColor = array.getColor(R.styleable.PasswordView_bgColor, mBgColor);
    outRingLineColor = array.getColor(R.styleable.PasswordView_outRingColor, outRingLineColor);
    mPasswordColor = array.getColor(R.styleable.PasswordView_passwordColor, mPasswordColor);
    array.recycle();
  }
  /**
   * 初始化畫筆
   */
  private void initPaint() {
    mPaint = new Paint();
    mPaint.setAntiAlias(true);
    mPaint.setDither(true);
  }
  /**
   * dip 轉(zhuǎn) 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) * outRingLineSize;
    mPasswordItemWidth = passwordWidth / mPasswordNumber;
    // 繪制背景外圓
    drawOutRing(canvas);
    // 繪制背景內(nèi)圓
    drawInRing(canvas);
    // 繪制密碼
    drawHidePassword(canvas);
  }
  @Override
  public void setText(CharSequence text, BufferType type) {
    super.setText(text, type);
  }
  /**
   * 繪制背景外圓
   */
  private void drawOutRing(Canvas canvas) {
    mPaint.setColor(mBgColor);
    // 設(shè)置畫筆為空心
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeWidth(mBgSize);
    RectF rectF = new RectF(mBgSize, mBgSize, getWidth() - mBgSize, getHeight() - mBgSize);
    // 畫圓
    for (int i = 0; i < mPasswordNumber; i++) {
      int cx = i * outRingLineSize + i * mPasswordItemWidth + mPasswordItemWidth / 2 + mBgSize;
      canvas.drawCircle(cx, getHeight() / 2, mOutRadius, mPaint);
    }
  }
  /**
   * 繪制隱藏的密碼
   */
  private void drawHidePassword(Canvas canvas) {
    int passwordLength = getText().length();
    if (passwordLength > 6) passwordLength = 6;
    mPaint.setColor(mPasswordColor);
    // 設(shè)置畫筆為實(shí)心
    mPaint.setStyle(Paint.Style.FILL);
    for (int i = 0; i < passwordLength; i++) {
      int cx = i * outRingLineSize + i * mPasswordItemWidth + mPasswordItemWidth / 2 + mBgSize;
      canvas.drawCircle(cx, getHeight() / 2, mPasswordRadius, mPaint);
    }
    //外圓
    mPaint.setColor(mPasswordColor);
    // 設(shè)置畫筆為空心
    mPaint.setStyle(Paint.Style.STROKE);
    mPaint.setStrokeWidth(mBgSize);
    RectF rectF = new RectF(mBgSize, mBgSize, getWidth() - mBgSize, getHeight() - mBgSize);
    // 如果沒(méi)有設(shè)置圓角，就畫矩形
    for (int i = 0; i < passwordLength; i++) {
      int cx = i * outRingLineSize + i * mPasswordItemWidth + mPasswordItemWidth / 2 + mBgSize;
      canvas.drawCircle(cx, getHeight() / 2, mOutRadius, mPaint);
    }
  }
  /**
   * 繪制背景內(nèi)圓
   */
  private void drawInRing(Canvas canvas) {
    mPaint.setColor(outRingLineColor);
    // 設(shè)置畫筆為實(shí)心
    mPaint.setStyle(Paint.Style.FILL);
    // 畫圈圈
    for (int i = 0; i < mPasswordNumber; i++) {
      int cx = i * outRingLineSize + i * mPasswordItemWidth + mPasswordItemWidth / 2 + mBgSize;
      canvas.drawCircle(cx, getHeight() / 2, mPasswordRadius, mPaint);
    }
  }
}

總結(jié)

以上所述是小編給大家介紹的Android 自定義密碼輸入框?qū)崿F(xiàn)代碼，希望對(duì)大家有所幫助，如果大家有任何疑問(wèn)請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)腳本之家網(wǎng)站的支持！

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