Android 簡(jiǎn)易手勢(shì)密碼開(kāi)源庫(kù)詳解

更新時(shí)間：2016年08月26日 08:54:27 作者：蘇耀東

本文主要介紹Android 簡(jiǎn)易手勢(shì)密碼，這里主要介紹手勢(shì)密碼如何實(shí)現(xiàn)及簡(jiǎn)單的示例代碼，有需要的同學(xué)可以參考下

簡(jiǎn)介

本文介紹一個(gè)Android手勢(shì)密碼開(kāi)源庫(kù)的使用及實(shí)現(xiàn)的詳細(xì)過(guò)程，該開(kāi)源庫(kù)主要實(shí)現(xiàn)以下幾個(gè)功能：

支持手勢(shì)密碼的繪制，并支持密碼保存功能，解鎖時(shí)自動(dòng)比對(duì)密碼給出結(jié)果
封裝了繪制密碼的方法，比對(duì)兩次密碼是否一致，可以快捷地進(jìn)行手勢(shì)密碼的設(shè)置
可以設(shè)置密碼輸入錯(cuò)誤后的重試次數(shù)上限
可以自定義不同狀態(tài)下手勢(shì)密碼圖案的顏色
可以自定義手勢(shì)密碼的觸摸點(diǎn)數(shù)量（n*n）

最近需要用到手勢(shì)密碼解鎖功能，找了一些demo感覺(jué)用起來(lái)都有點(diǎn)麻煩，于是參考一些文章自己造了下輪子，封裝了相關(guān)的一些方法，使用起來(lái)比較便捷。

github鏈接如下，覺(jué)得還可以請(qǐng)幫忙star支持下~

github鏈接個(gè)人博客

使用效果

首先看下使用效果：

使用方法

XML布局文件中使用該控件

<com.syd.oden.gesturelock.view.GestureLockViewGroup
  android:id="@+id/gesturelock"
  android:layout_width="match_parent"
  android:layout_height="match_parent"
  app:preference_id="1"
  android:layout_marginTop="30dp"
  app:count="3" />

可以設(shè)置的一些參數(shù)，說(shuō)明如下:

color_no_finger:未觸摸時(shí)圓形的顏色
color_finger_on:觸摸時(shí)圓形的顏色
color_finger_up_correct:輸入正確時(shí)圓形的顏色
color_finger_up_error:出錯(cuò)時(shí)圓形的顏色
count：收拾密碼的圓形數(shù)量，n*n
preference_id：手勢(shì)密碼保存的id號(hào)，不輸入或輸入-1則使用默認(rèn)的id

初始化

private void initGesture() {
  mGestureLockViewGroup = (GestureLockViewGroup) findViewById(R.id.gesturelock);
  gestureEventListener();
  gesturePasswordSettingListener();
  gestureRetryLimitListener();
 }

設(shè)置手勢(shì)密碼監(jiān)聽(tīng)事件

private void gestureEventListener() {
  mGestureLockViewGroup.setGestureEventListener(new GestureEventListener() {
   @Override
   public void onGestureEvent(boolean matched) {
    mylog.d("onGestureEvent matched: " + matched);
    if (!matched) {
     tv_state.setTextColor(Color.RED);
     tv_state.setText("手勢(shì)密碼錯(cuò)誤");
    } else {
     if (isReset) {
      isReset = false;
      Toast.makeText(MainActivity.this, "清除成功!", Toast.LENGTH_SHORT).show();
      resetGesturePattern();
     } else {
      tv_state.setTextColor(Color.WHITE);
      tv_state.setText("手勢(shì)密碼正確");
     }
    }
   }
  });
 }

若已經(jīng)設(shè)置有密碼則會(huì)進(jìn)入該回調(diào)，在這里對(duì)結(jié)果進(jìn)行處理，上面的例子中加入了一個(gè)重設(shè)密碼的處理。

手勢(shì)密碼設(shè)置

private void gesturePasswordSettingListener() {
  mGestureLockViewGroup.setGesturePasswordSettingListener(new GesturePasswordSettingListener() {
   @Override
   public boolean onFirstInputComplete(int len) {
    if (len > 3) {
     tv_state.setTextColor(Color.WHITE);
     tv_state.setText("再次繪制手勢(shì)密碼");
     return true;
    } else {
     tv_state.setTextColor(Color.RED);
     tv_state.setText("最少連接4個(gè)點(diǎn)，請(qǐng)重新輸入!");
     return false;
    }
   }

   @Override
   public void onSuccess() {
    tv_state.setTextColor(Color.WHITE);
    Toast.makeText(MainActivity.this, "密碼設(shè)置成功!", Toast.LENGTH_SHORT).show();
    tv_state.setText("請(qǐng)輸入手勢(shì)密碼解鎖!");
   }

   @Override
   public void onFail() {
    tv_state.setTextColor(Color.RED);
    tv_state.setText("與上一次繪制不一致，請(qǐng)重新繪制");
   }
  });
 }

若還未設(shè)置密碼，繪制手勢(shì)的時(shí)候會(huì)進(jìn)入該回調(diào)，返回值為繪制的觸摸點(diǎn)的數(shù)量，onFirstInputComplete中返回true則進(jìn)入第二手勢(shì)密碼的繪制，兩次輸入一致后自動(dòng)保存密碼。

重試次數(shù)超過(guò)限制監(jiān)聽(tīng)

private void gestureRetryLimitListener() {
  mGestureLockViewGroup.setGestureUnmatchedExceedListener(3, new GestureUnmatchedExceedListener() {
   @Override
   public void onUnmatchedExceedBoundary() {
    tv_state.setTextColor(Color.RED);
    tv_state.setText("錯(cuò)誤次數(shù)過(guò)多，請(qǐng)稍后再試!");
   }
  });
 }

若設(shè)置了該監(jiān)聽(tīng)事件，則輸入錯(cuò)誤有次數(shù)限制，超過(guò)上限后進(jìn)入回調(diào)，在該回調(diào)中進(jìn)行處理。

清除密碼的邏輯自己加個(gè)判斷處理下即可，具體可以看下github上的demo

其他的一些API

public void removePassword() ：清除密碼
public void savePassword() : 保存密碼，設(shè)置手勢(shì)密碼成功后會(huì)自動(dòng)保存，也可以調(diào)用該接口另外設(shè)置密碼
public void getPassword()： 獲取密碼
public void setRetryTimes(int retryTimes) ： 設(shè)置重試次數(shù)上限
public boolean isSetPassword() ： 返回現(xiàn)在是否已經(jīng)設(shè)置有密碼
public void resetView() ： 將視圖Reset

在項(xiàng)目中導(dǎo)入該庫(kù)

僅需加入兩行代碼：

在工程的 build.gradle中加入：

allprojects {
  repositories {
   ...
   maven { url "https://jitpack.io" }
  }
 }

module的build.gradle中加入依賴(lài)：

dependencies {
   compile 'com.github.autume:GestureLock:1.0.0'
 }

總的使用就是這樣，是不是很簡(jiǎn)單！

具體實(shí)現(xiàn)過(guò)程

下面講下實(shí)現(xiàn)的過(guò)程，如果只是直接拿來(lái)用的話(huà)也可以略過(guò)這部分。

自定義手勢(shì)密碼的圓形view

這部分主要參考Hongyang大大的博客，稍微修改了一下

初始化傳入?yún)?shù)

public GestureLockView(Context context, int colorNoFingerr, int colorFingerOn, int colorCorrect, int colorError) {
  super(context);
  this.mColorNoFinger = colorNoFingerr;
  this.mColorFingerOn = colorFingerOn;
  this.mColorFingerUpCorrect = colorCorrect;
  this.mColorFingerUpError = colorError;
  mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  mArrowPath = new Path();
 }

根據(jù)不同的觸摸狀態(tài)繪制不同顏色的圓

@Override
 protected void onDraw(Canvas canvas) {

  switch (mCurrentStatus) {
   case STATUS_FINGER_ON:
    // 繪制外圓
    mPaint.setStyle(Style.STROKE);
    mPaint.setColor(mColorFingerOn);
    mPaint.setStrokeWidth(2);
    canvas.drawCircle(mCenterX, mCenterY, mRadius, mPaint);
    // 繪制內(nèi)圓
    mPaint.setStyle(Style.FILL);
    canvas.drawCircle(mCenterX, mCenterY, mRadius * mInnerCircleRadiusRate, mPaint);
    break;
   case STATUS_FINGER_UP:
    // 繪制外圓
    if (GestureLockViewGroup.isCorrect)
     mPaint.setColor(mColorFingerUpCorrect);
    else
     mPaint.setColor(mColorFingerUpError);
    mPaint.setStyle(Style.STROKE);
    mPaint.setStrokeWidth(2);
    canvas.drawCircle(mCenterX, mCenterY, mRadius, mPaint);
    // 繪制內(nèi)圓
    mPaint.setStyle(Style.FILL);
    canvas.drawCircle(mCenterX, mCenterY, mRadius * mInnerCircleRadiusRate, mPaint);
    drawArrow(canvas);
    break;
   case STATUS_NO_FINGER:
    // 繪制外圓
    mPaint.setStyle(Style.STROKE);
    mPaint.setColor(mColorNoFinger);
    canvas.drawCircle(mCenterX, mCenterY, mRadius, mPaint);
    // 繪制內(nèi)圓
    mPaint.setStyle(Style.FILL);
    mPaint.setColor(mColorNoFinger);
    canvas.drawCircle(mCenterX, mCenterY, mRadius * mInnerCircleRadiusRate, mPaint);
    break;
  }
 }

繪制箭頭

@Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
  super.onMeasure(widthMeasureSpec, heightMeasureSpec);

  mWidth = MeasureSpec.getSize(widthMeasureSpec);
  mHeight = MeasureSpec.getSize(heightMeasureSpec);

  // 取長(zhǎng)和寬中的小值
  mWidth = mWidth < mHeight ? mWidth : mHeight;
  mRadius = mCenterX = mCenterY = mWidth / 2;
  mRadius -= mStrokeWidth / 2;

  // 繪制三角形，初始時(shí)是個(gè)默認(rèn)箭頭朝上的一個(gè)等腰三角形，用戶(hù)繪制結(jié)束后，根據(jù)由兩個(gè)GestureLockView決定需要旋轉(zhuǎn)多少度
  float mArrowLength = mWidth / 2 * mArrowRate;
  mArrowPath.moveTo(mWidth / 2, mStrokeWidth + 2);
  mArrowPath.lineTo(mWidth / 2 - mArrowLength, mStrokeWidth + 2 + mArrowLength);
  mArrowPath.lineTo(mWidth / 2 + mArrowLength, mStrokeWidth + 2 + mArrowLength);
  mArrowPath.close();
  mArrowPath.setFillType(Path.FillType.WINDING);
 }

 private void drawArrow(Canvas canvas) {
  if (mArrowDegree != -1) {
   mPaint.setStyle(Paint.Style.FILL);

   canvas.save();
   canvas.rotate(mArrowDegree, mCenterX, mCenterY);
   canvas.drawPath(mArrowPath, mPaint);
   canvas.restore();
  }
 }

自定義手勢(shì)密碼的ViewGroup

加入自定義view的屬性

<?xml version="1.0" encoding="utf-8"?>
<resources>

 <attr name="color_no_finger" format="color" />
 <attr name="color_finger_on" format="color" />
 <attr name="color_finger_up_correct" format="color" />
 <attr name="color_finger_up_error" format="color" />
 <attr name="count" format="integer" />
 <attr name="preference_id" format="integer" />

 <declare-styleable name="GestureLockViewGroup">
  <attr name="color_no_finger" />
  <attr name="color_finger_on" />
  <attr name="color_finger_up_correct" />
  <attr name="color_finger_up_error" />
  <attr name="count" />
  <attr name="preference_id" />
 </declare-styleable>

</resources>

獲取參數(shù)及初始化

public GestureLockViewGroup(Context context, AttributeSet attrs,
        int defStyle) {
  super(context, attrs, defStyle);

  /**
   * 獲得所有自定義的參數(shù)的值
   */
  TypedArray a = context.obtainStyledAttributes(attrs,
    R.styleable.GestureLockViewGroup, defStyle, 0);

  mNoFingerColor = a.getColor(R.styleable.GestureLockViewGroup_color_no_finger, mNoFingerColor);
  mFingerOnColor = a.getColor(R.styleable.GestureLockViewGroup_color_finger_on, mFingerOnColor);
  mFingerUpColorCorrect = a.getColor(R.styleable.GestureLockViewGroup_color_finger_up_correct, mFingerUpColorCorrect);
  mFingerUpColorError = a.getColor(R.styleable.GestureLockViewGroup_color_finger_up_error, mFingerUpColorError);
  mCount = a.getInt(R.styleable.GestureLockViewGroup_count, mCount);
  mPrferenceId = a.getInt(R.styleable.GestureLockViewGroup_preference_id, mPrferenceId);

  a.recycle();

  /**
   * 獲取密碼狀態(tài)
   */
  gesturePreference = new GesturePreference(context, mPrferenceId);
  password = gesturePreference.ReadStringPreference();
  Log.d(TAG, "password now is : " + password);
  isSetPassword = !password.equals("null"); //判斷是否已經(jīng)保存有密碼
  isInPasswordSettingMode = !isSetPassword;  //當(dāng)未設(shè)置密碼，進(jìn)入密碼設(shè)置模式

  // 初始化畫(huà)筆
  mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
  mPaint.setStyle(Paint.Style.STROKE);
  mPaint.setStrokeCap(Paint.Cap.ROUND);
  mPaint.setStrokeJoin(Paint.Join.ROUND);
  mPath = new Path();
 }

根據(jù)參數(shù)繪制出圓

在onMeasure后調(diào)用該方法，繪制圓形矩陣

private GestureLockView[] mGestureLockViews; //保存所有的GestureLockView

private void initViews() {
  // 初始化mGestureLockViews
  if (mGestureLockViews == null) {
   mGestureLockViews = new GestureLockView[mCount * mCount];
   // 計(jì)算每個(gè)GestureLockView的寬度
   mGestureLockViewWidth = (int) (4 * mWidth * 1.0f / (5 * mCount + 1));
   //計(jì)算每個(gè)GestureLockView的間距
   mMarginBetweenLockView = (int) (mGestureLockViewWidth * 0.25);
   // 設(shè)置畫(huà)筆的寬度為GestureLockView的內(nèi)圓直徑稍微小點(diǎn)
   mPaint.setStrokeWidth(mGestureLockViewWidth * 0.29f);

   for (int i = 0; i < mGestureLockViews.length; i++) {
    //初始化每個(gè)GestureLockView
    mGestureLockViews[i] = new GestureLockView(getContext(), mNoFingerColor, mFingerOnColor, mFingerUpColorCorrect, mFingerUpColorError);
    mGestureLockViews[i].setId(i + 1);
    //設(shè)置參數(shù)，主要是定位GestureLockView間的位置
    RelativeLayout.LayoutParams lockerParams = new RelativeLayout.LayoutParams(
      mGestureLockViewWidth, mGestureLockViewWidth);

    // 不是每行的第一個(gè)，則設(shè)置位置為前一個(gè)的右邊
    if (i % mCount != 0) {
     lockerParams.addRule(RelativeLayout.RIGHT_OF,
       mGestureLockViews[i - 1].getId());
    }
    // 從第二行開(kāi)始，設(shè)置為上一行同一位置View的下面
    if (i > mCount - 1) {
     lockerParams.addRule(RelativeLayout.BELOW,
       mGestureLockViews[i - mCount].getId());
    }
    //設(shè)置右下左上的邊距
    int rightMargin = mMarginBetweenLockView;
    int bottomMargin = mMarginBetweenLockView;
    int leftMagin = 0;
    int topMargin = 0;
    /**
     * 每個(gè)View都有右外邊距和底外邊距 第一行的有上外邊距 第一列的有左外邊距
     */
    if (i >= 0 && i < mCount)// 第一行
    {
     topMargin = mMarginBetweenLockView;
    }
    if (i % mCount == 0)// 第一列
    {
     leftMagin = mMarginBetweenLockView;
    }

    lockerParams.setMargins(leftMagin, topMargin, rightMargin,
      bottomMargin);
    mGestureLockViews[i].setMode(Mode.STATUS_NO_FINGER);
    addView(mGestureLockViews[i], lockerParams);
   }
  }
 }

在觸摸監(jiān)聽(tīng)中處理不同事件

@Override
 public boolean onTouchEvent(MotionEvent event) {
  int action = event.getAction();
  int x = (int) event.getX();
  int y = (int) event.getY();
  Log.d(TAG, "mTryTimes : " + mTryTimes);

  //重試次數(shù)超過(guò)限制，直接返回
  if (mTryTimes <= 0 && isRetryTimeLimit) { 
   return true;
  }

  switch (action) {
   case MotionEvent.ACTION_DOWN:
    reset();  // 重置
    break;
   case MotionEvent.ACTION_MOVE:
    drawAndGetSelectedWhenTouchMove(x, y);
    break;
   case MotionEvent.ACTION_UP:
    if (isInPasswordSettingMode) {
     if (gesturePasswordSettingListener != null)
      setPasswordHandle(); //設(shè)置密碼
    } else {
     if (mChoose.size() > 0) {
      isCorrect = checkAnswer();
     } else {
      return true;
     }

     if (gestureEventListener != null) {
      gestureEventListener.onGestureEvent(isCorrect); //將結(jié)果回調(diào)
     }
     if (this.mTryTimes == 0) {
      gestureUnmatchedExceedListener.onUnmatchedExceedBoundary(); //超出重試次數(shù)，進(jìn)入回調(diào)
     }
    }
    drawWhenTouchUp();
    break;
  }
  invalidate();
  return true;
 }

 private void drawAndGetSelectedWhenTouchMove(int x, int y) {
  mPaint.setColor(mFingerOnColor);
  mPaint.setAlpha(50);
  GestureLockView child = getChildIdByPos(x, y);
  if (child != null) {
   int cId = child.getId();
   if (!mChoose.contains(cId)) {
    mChoose.add(cId);
    mChooseString = mChooseString + cId;
    child.setMode(Mode.STATUS_FINGER_ON);
    // 設(shè)置指引線(xiàn)的起點(diǎn)
    mLastPathX = child.getLeft() / 2 + child.getRight() / 2;
    mLastPathY = child.getTop() / 2 + child.getBottom() / 2;

    if (mChoose.size() == 1)// 當(dāng)前添加為第一個(gè)
    {
     mPath.moveTo(mLastPathX, mLastPathY);
    } else
    // 非第一個(gè)，將兩者使用線(xiàn)連上
    {
     mPath.lineTo(mLastPathX, mLastPathY);
    }
   }
  }
  // 指引線(xiàn)的終點(diǎn)
  mTmpTarget.x = x;
  mTmpTarget.y = y;
 }

 private void drawWhenTouchUp() {
  if (isCorrect) {
   mPaint.setColor(mFingerUpColorCorrect);
  } else {
   mPaint.setColor(mFingerUpColorError);
  }
  mPaint.setAlpha(50);
  Log.d(TAG, "mChoose = " + mChoose);
  // 將終點(diǎn)設(shè)置位置為起點(diǎn)，即取消指引線(xiàn)
  mTmpTarget.x = mLastPathX;
  mTmpTarget.y = mLastPathY;

  // 改變子元素的狀態(tài)為UP
  setItemModeUp();

  // 計(jì)算每個(gè)元素中箭頭需要旋轉(zhuǎn)的角度
  for (int i = 0; i + 1 < mChoose.size(); i++) {
   int childId = mChoose.get(i);
   int nextChildId = mChoose.get(i + 1);

   GestureLockView startChild = (GestureLockView) findViewById(childId);
   GestureLockView nextChild = (GestureLockView) findViewById(nextChildId);

   int dx = nextChild.getLeft() - startChild.getLeft();
   int dy = nextChild.getTop() - startChild.getTop();
   // 計(jì)算角度
   int angle = (int) Math.toDegrees(Math.atan2(dy, dx)) + 90;
   startChild.setArrowDegree(angle);
  }
 }

設(shè)置密碼處理:

private void setPasswordHandle() {
  if (isWaitForFirstInput) {
   if (gesturePasswordSettingListener.onFirstInputComplete(mChooseString.length())) {
    firstInputPassword = mChooseString;
    isWaitForFirstInput = false;
   }
  } else {
   if (firstInputPassword.equals(mChooseString)) {
    gesturePasswordSettingListener.onSuccess();
    savePassword(mChooseString);
    isInPasswordSettingMode = false;
   } else {
    gesturePasswordSettingListener.onFail();
   }
  }
  reset();
 }

檢查手勢(shì)密碼是否正確:

public boolean checkAnswer() {
  if (password.equals(mChooseString)) {
   return true;
  } else {
   if (isRetryTimeLimit)
    this.mTryTimes--;
   return false;
  }
 }

重置：

private void reset() {
  mChoose.clear();
  mChooseString = "";
  mPath.reset();
  for (GestureLockView gestureLockView : mGestureLockViews) {
   gestureLockView.setMode(Mode.STATUS_NO_FINGER);
   gestureLockView.setArrowDegree(-1);
  }
 }

對(duì)外公開(kāi)的一些方法

public void setGestureEventListener(GestureEventListener gestureEventListener) {
  this.gestureEventListener = gestureEventListener;
 }

 public void setGestureUnmatchedExceedListener(int retryTimes, GestureUnmatchedExceedListener gestureUnmatchedExceedListener) {
  isRetryTimeLimit = true;
  this.mTryTimes = retryTimes;
  this.gestureUnmatchedExceedListener = gestureUnmatchedExceedListener;
 }

 public void setGesturePasswordSettingListener(GesturePasswordSettingListener gesturePasswordSettingListener) {
  this.gesturePasswordSettingListener = gesturePasswordSettingListener;
 }

 public void removePassword() {
  gesturePreference.WriteStringPreference("null");
  this.isSetPassword = false;
  isWaitForFirstInput = true;
  isInPasswordSettingMode = true;
 }

 public void savePassword(String password) {
  this.password = password;
  gesturePreference.WriteStringPreference(password);
 }

 public String getPassword() {
  return password;
 }

 public void resetView() {
  reset();
  invalidate();
 }

 public void setRetryTimes(int retryTimes) {
  this.mTryTimes = retryTimes;
 }

 public boolean isSetPassword() {
  return isSetPassword;
 }

定義密碼存儲(chǔ)的Preference

就是簡(jiǎn)單的存和讀

public GesturePreference(Context context, int nameTableId) {
  this.context = context;
  if (nameTableId != -1)
   this.nameTable = nameTable + nameTableId;
 }

 public void WriteStringPreference(String data) {
  SharedPreferences preferences = context.getSharedPreferences(fileName, Context.MODE_PRIVATE);
  SharedPreferences.Editor editor = preferences.edit();
  editor.putString(nameTable, data);
  editor.commit();
 }

 public String ReadStringPreference() {
  SharedPreferences preferences = context.getSharedPreferences(fileName, Context.MODE_PRIVATE);
  return preferences.getString(nameTable, "null");
 }

總結(jié)

ok，至此，整個(gè)手勢(shì)密碼的實(shí)現(xiàn)就完成了。

以上就是小編對(duì)Android實(shí)現(xiàn)簡(jiǎn)易手勢(shì)密碼的資料整理，后續(xù)繼續(xù)整理相關(guān)資料，謝謝大家對(duì)本站的支持！

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