简介
本文介绍一个Android手势密码开源库的使用及实现的详细过程，该开源库主要实现以下几个功能：
支持手势密码的绘制，并支持密码保存功能，解锁时自动比对密码给出结果
封装了绘制密码的方法，比对两次密码是否一致，可以快捷地进行手势密码的设置
可以设置密码输入错误后的重试次数上限
可以自定义不同状态下手势密码图案的颜色
可以自定义手势密码的触摸点数量（n*n）
最近需要用到手势密码解锁功能，找了一些demo感觉用起来都有点麻烦，于是参考一些文章自己造了下轮子，封装了相关的一些方法，使用起来比较便捷。
github链接如下，觉得还可以请帮忙star支持下~
使用效果
首先看下使用效果：
使用方法
XML布局文件中使用该控件
<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" />
可以设置的一些参数，说明如下:
color_no_finger:未触摸时圆形的颜色
color_finger_on:触摸时圆形的颜色
color_finger_up_correct:输入正确时圆形的颜色
color_finger_up_error:出错时圆形的颜色
count：收拾密码的圆形数量，n*n
preference_id：手势密码保存的id号，不输入或输入-1则使用默认的id
初始化
private void initGesture() {
mGestureLockViewGroup = (GestureLockViewGroup) findViewById(R.id.gesturelock);
gestureEventListener();
gesturePasswordSettingListener();
gestureRetryLimitListener();
}设置手势密码监听事件
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("手势密码错误");
} 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("手势密码正确");
}
}
}
});
}若已经设置有密码则会进入该回调，在这里对结果进行处理，上面的例子中加入了一个重设密码的处理。
手势密码设置
private void gesturePasswordSettingListener() {
mGestureLockViewGroup.setGesturePasswordSettingListener(new GesturePasswordSettingListener() { @Override
public boolean onFirstInputComplete(int len) { if (len > 3) {
tv_state.setTextColor(Color.WHITE);
tv_state.setText("再次绘制手势密码"); return true;
} else {
tv_state.setTextColor(Color.RED);
tv_state.setText("最少连接4个点，请重新输入!"); return false;
}
} @Override
public void onSuccess() {
tv_state.setTextColor(Color.WHITE);
Toast.makeText(MainActivity.this, "密码设置成功!", Toast.LENGTH_SHORT).show();
tv_state.setText("请输入手势密码解锁!");
} @Override
public void onFail() {
tv_state.setTextColor(Color.RED);
tv_state.setText("与上一次绘制不一致，请重新绘制");
}
});
}若还未设置密码，绘制手势的时候会进入该回调，返回值为绘制的触摸点的数量，onFirstInputComplete中返回true则进入第二手势密码的绘制，两次输入一致后自动保存密码。
重试次数超过限制监听
private void gestureRetryLimitListener() {
mGestureLockViewGroup.setGestureUnmatchedExceedListener(3, new GestureUnmatchedExceedListener() { @Override
public void onUnmatchedExceedBoundary() {
tv_state.setTextColor(Color.RED);
tv_state.setText("错误次数过多，请稍后再试!");
}
});
}若设置了该监听事件，则输入错误有次数限制，超过上限后进入回调，在该回调中进行处理。
清除密码的逻辑自己加个判断处理下即可，具体可以看下github上的demo
其他的一些API
public void removePassword() ：清除密码
public void savePassword() : 保存密码，设置手势密码成功后会自动保存，也可以调用该接口另外设置密码
public void getPassword()： 获取密码
public void setRetryTimes(int retryTimes) ： 设置重试次数上限
public boolean isSetPassword() ： 返回现在是否已经设置有密码
public void resetView() ： 将视图Reset
在项目中导入该库
仅需加入两行代码：
在工程的 build.gradle中加入：
allprojects {
repositories {
...
maven { url "https://jitpack.io" }
}
}module的build.gradle中加入依赖：
dependencies { compile 'com.github.autume:GestureLock:1.0.0'
}总的使用就是这样，是不是很简单！
具体实现过程
下面讲下实现的过程，如果只是直接拿来用的话也可以略过这部分。
自定义手势密码的圆形view
这部分主要参考Hongyang大大的博客，稍微修改了一下
初始化传入参数
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();
}根据不同的触摸状态绘制不同颜色的圆
@Override
protected void onDraw(Canvas canvas) { switch (mCurrentStatus) { case STATUS_FINGER_ON: // 绘制外圆
mPaint.setStyle(Style.STROKE);
mPaint.setColor(mColorFingerOn);
mPaint.setStrokeWidth(2);
canvas.drawCircle(mCenterX, mCenterY, mRadius, mPaint); // 绘制内圆
mPaint.setStyle(Style.FILL);
canvas.drawCircle(mCenterX, mCenterY, mRadius * mInnerCircleRadiusRate, mPaint); break; case STATUS_FINGER_UP: // 绘制外圆
if (GestureLockViewGroup.isCorrect)
mPaint.setColor(mColorFingerUpCorrect); else
mPaint.setColor(mColorFingerUpError);
mPaint.setStyle(Style.STROKE);
mPaint.setStrokeWidth(2);
canvas.drawCircle(mCenterX, mCenterY, mRadius, mPaint); // 绘制内圆
mPaint.setStyle(Style.FILL);
canvas.drawCircle(mCenterX, mCenterY, mRadius * mInnerCircleRadiusRate, mPaint);
drawArrow(canvas); break; case STATUS_NO_FINGER: // 绘制外圆
mPaint.setStyle(Style.STROKE);
mPaint.setColor(mColorNoFinger);
canvas.drawCircle(mCenterX, mCenterY, mRadius, mPaint); // 绘制内圆
mPaint.setStyle(Style.FILL);
mPaint.setColor(mColorNoFinger);
canvas.drawCircle(mCenterX, mCenterY, mRadius * mInnerCircleRadiusRate, mPaint); break;
}
}绘制箭头
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec, heightMeasureSpec);
mWidth = MeasureSpec.getSize(widthMeasureSpec);
mHeight = MeasureSpec.getSize(heightMeasureSpec); // 取长和宽中的小值
mWidth = mWidth < mHeight ? mWidth : mHeight;
mRadius = mCenterX = mCenterY = mWidth / 2;
mRadius -= mStrokeWidth / 2; // 绘制三角形，初始时是个默认箭头朝上的一个等腰三角形，用户绘制结束后，根据由两个GestureLockView决定需要旋转多少度
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();
}
}自定义手势密码的ViewGroup
加入自定义view的属性
<?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>
获取参数及初始化
public GestureLockViewGroup(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle); /**
* 获得所有自定义的参数的值
*/
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(); /**
* 获取密码状态
*/
gesturePreference = new GesturePreference(context, mPrferenceId);
password = gesturePreference.ReadStringPreference();
Log.d(TAG, "password now is : " + password);
isSetPassword = !password.equals("null"); //判断是否已经保存有密码
isInPasswordSettingMode = !isSetPassword; //当未设置密码，进入密码设置模式
// 初始化画笔
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();
}根据参数绘制出圆
在onMeasure后调用该方法，绘制圆形矩阵
private GestureLockView[] mGestureLockViews; //保存所有的GestureLockViewprivate void initViews() { // 初始化mGestureLockViews
if (mGestureLockViews == null) {
mGestureLockViews = new GestureLockView[mCount * mCount]; // 计算每个GestureLockView的宽度
mGestureLockViewWidth = (int) (4 * mWidth * 1.0f / (5 * mCount + 1)); //计算每个GestureLockView的间距
mMarginBetweenLockView = (int) (mGestureLockViewWidth * 0.25); // 设置画笔的宽度为GestureLockView的内圆直径稍微小点
mPaint.setStrokeWidth(mGestureLockViewWidth * 0.29f); for (int i = 0; i < mGestureLockViews.length; i++) { //初始化每个GestureLockView
mGestureLockViews[i] = new GestureLockView(getContext(), mNoFingerColor, mFingerOnColor, mFingerUpColorCorrect, mFingerUpColorError);
mGestureLockViews[i].setId(i + 1); //设置参数，主要是定位GestureLockView间的位置
RelativeLayout.LayoutParams lockerParams = new RelativeLayout.LayoutParams(
mGestureLockViewWidth, mGestureLockViewWidth); // 不是每行的第一个，则设置位置为前一个的右边
if (i % mCount != 0) {
lockerParams.addRule(RelativeLayout.RIGHT_OF,
mGestureLockViews[i - 1].getId());
} // 从第二行开始，设置为上一行同一位置View的下面
if (i > mCount - 1) {
lockerParams.addRule(RelativeLayout.BELOW,
mGestureLockViews[i - mCount].getId());
} //设置右下左上的边距
int rightMargin = mMarginBetweenLockView; int bottomMargin = mMarginBetweenLockView; int leftMagin = 0; int topMargin = 0; /**
* 每个View都有右外边距和底外边距 第一行的有上外边距 第一列的有左外边距
*/
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);
}
}
}在触摸监听中处理不同事件
@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); //重试次数超过限制，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(); //设置密码
} else { if (mChoose.size() > 0) {
isCorrect = checkAnswer();
} else { return true;
} if (gestureEventListener != null) {
gestureEventListener.onGestureEvent(isCorrect); //将结果回调
} if (this.mTryTimes == 0) {
gestureUnmatchedExceedListener.onUnmatchedExceedBoundary(); //超出重试次数，进入回调
}
}
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); // 设置指引线的起点
mLastPathX = child.getLeft() / 2 + child.getRight() / 2;
mLastPathY = child.getTop() / 2 + child.getBottom() / 2; if (mChoose.size() == 1)// 当前添加为第一个
{
mPath.moveTo(mLastPathX, mLastPathY);
} else
// 非第一个，将两者使用线连上
{
mPath.lineTo(mLastPathX, mLastPathY);
}
}
} // 指引线的终点
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); // 将终点设置位置为起点，即取消指引线
mTmpTarget.x = mLastPathX;
mTmpTarget.y = mLastPathY; // 改变子元素的状态为UP
setItemModeUp(); // 计算每个元素中箭头需要旋转的角度
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(); // 计算角度
int angle = (int) Math.toDegrees(Math.atan2(dy, dx)) + 90;
startChild.setArrowDegree(angle);
}
}设置密码处理:
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();
}检查手势密码是否正确:
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);
}
}对外公开的一些方法
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;
}定义密码存储的Preference
就是简单的存和读
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");
}总结
ok，至此，整个手势密码的实现就完成了。
本文链接：http://www.codeceo.com/article/android-gusture-lock.html
本文作者：码农网 – 苏耀东
点击查看更多内容
为 TA 点赞
评论
共同学习，写下你的评论
评论加载中...
作者其他优质文章
正在加载中
感谢您的支持，我会继续努力的～
扫码打赏，你说多少就多少
赞赏金额会直接到老师账户
支付方式
打开微信扫一扫，即可进行扫码打赏哦