Android 手势锁的实现 为了让自己的应用程序的安全，现在

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今天偶遇以github上gesturelock关于手势锁的一个样例（有兴趣的去搜索下看看），于是下载下来研究，无奈基本没有凝视。代码上存在一些问题(当设置gravity=center_vertical无法进行手势选择，无意中发现的)，于是借鉴这位仁兄的代码。自己重写写了一个，修复了一些问题，增加一些主要的自己定义属性。在此先感谢这位兄弟~。

先上图。默认效果图：



当然能够自己定义数量啊，颜色神马的。自己定义效果图：





假设你有艺术细胞，能够给我推荐几个颜色，无奈个人审美有问题~

1、总体思路
a、自己定义了一个RelativeLayout(GestureLockViewGroup)在里面会依据传入的每行的个数，生成多个GestureLockView（就是上面一个个小圈圈），然后会自己主动进行布局，里面的宽度，间距。内圆的直径。箭头的大小神马的都是百分比实现的。所以大胆的设置你喜欢的个数，仅仅要你没有密集恐惧症~

b、GestureLockView有三个状态。没有手指触碰、手指触碰、和手指抬起。会依据这三个状态绘制不同的效果，以及抬起时的小箭头须要旋转的角度，会依据用户选择的GestureLockView，进行计算。在GestureLockViewGroup为每一个GestureLockView设置

c、GestureLockViewGroup主要就是推断用户ACTION_MOVE。ACTION_DOWN 。 ACTION_UP时改变选中的GestureLockView的状态。而且记录下来，提供一定的回调。

以下開始看代码：

2、声明一些用户能够设置的属性：

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

>
<resources>

<attr name="color_no_finger_inner_circle" format="color" />
<attr name="color_no_finger_outer_circle" format="color" />
<attr name="color_finger_on" format="color" />
<attr name="color_finger_up" format="color" />
<attr name="count" format="integer" />
<attr name="tryTimes" format="integer" />

<declare-styleable name="GestureLockViewGroup">
<attr name="color_no_finger_inner_circle" />
<attr name="color_no_finger_outer_circle" />
<attr name="color_finger_on" />
<attr name="color_finger_up" />
<attr name="count" />
<attr name="tryTimes" />
</declare-styleable>

</resources>

用户能够用过在xml文件里设置这些属性，改变外观，最多尝试次数以及数量等。

3、GestureLockView

package com.zhy.zhy_gesturelockview.view;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Path;
import android.view.View;

public class GestureLockView extends View
{
private static final String TAG = "GestureLockView";
/**
* GestureLockView的三种状态
*/
enum Mode
{
STATUS_NO_FINGER, STATUS_FINGER_ON, STATUS_FINGER_UP;
}

/**
* GestureLockView的当前状态
*/
private Mode mCurrentStatus = Mode.STATUS_NO_FINGER;

/**
* 宽度
*/
private int mWidth;
/**
* 高度
*/
private int mHeight;
/**
* 外圆半径
*/
private int mRadius;
/**
* 画笔的宽度
*/
private int mStrokeWidth = 2;

/**
* 圆心坐标
*/
private int mCenterX;
private int mCenterY;
private Paint mPaint;

/**
* 箭头（小三角最长边的一半长度 = mArrawRate * mWidth / 2 ）
*/
private float mArrowRate = 0.333f;
private int mArrowDegree = -1;
private Path mArrowPath;
/**
* 内圆的半径 = mInnerCircleRadiusRate * mRadus
*
*/
private float mInnerCircleRadiusRate = 0.3F;

/**
* 四个颜色，可由用户自己定义，初始化时由GestureLockViewGroup传入
*/
private int mColorNoFingerInner;
private int mColorNoFingerOutter;
private int mColorFingerOn;
private int mColorFingerUp;

public GestureLockView(Context context , int colorNoFingerInner , int colorNoFingerOutter , int colorFingerOn , int colorFingerUp )
{
super(context);
this.mColorNoFingerInner = colorNoFingerInner;
this.mColorNoFingerOutter = colorNoFingerOutter;
this.mColorFingerOn = colorFingerOn;
this.mColorFingerUp = colorFingerUp;
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mArrowPath = new Path();

}

@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，依据由两个GestureLockView决定须要旋转多少度
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);

}

@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
mPaint.setColor(mColorFingerUp);
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.FILL);
mPaint.setColor(mColorNoFingerOutter);
canvas.drawCircle(mCenterX, mCenterY, mRadius, mPaint);
// 绘制内圆
mPaint.setColor(mColorNoFingerInner);
canvas.drawCircle(mCenterX, mCenterY, mRadius
* mInnerCircleRadiusRate, mPaint);
break;

}

}

/**
* 绘制箭头
* @param canvas
*/
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();
}

}

/**
* 设置当前模式并重绘界面
*
* @param mode
*/
public void setMode(Mode mode)
{
this.mCurrentStatus = mode;
invalidate();
}

public void setArrowDegree(int degree)
{
this.mArrowDegree = degree;
}

public int getArrowDegree()
{
return this.mArrowDegree;
}
}

凝视非常具体，主要就是onDraw时。推断当前状态。绘制不同的显示效果。状态的改变都是GestureLockViewGroup的onTouchEvent中设置的。

4、GestureLockViewGroup

package com.zhy.zhy_gesturelockview.view;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.RelativeLayout;

import com.zhy.zhy_gesturelockview.R;
import com.zhy.zhy_gesturelockview.view.GestureLockView.Mode;

/**
* 总体包括n*n个GestureLockView,每一个GestureLockView间间隔mMarginBetweenLockView，
* 最外层的GestureLockView与容器存在mMarginBetweenLockView的外边距
*
* 关于GestureLockView的边长（n*n）： n * mGestureLockViewWidth + ( n + 1 ) *
* mMarginBetweenLockView = mWidth ; 得：mGestureLockViewWidth = 4 * mWidth / ( 5
* * mCount + 1 ) 注：mMarginBetweenLockView = mGestureLockViewWidth * 0.25 ;
*
* @author zhy
*
*/
public class GestureLockViewGroup extends RelativeLayout
{

private static final String TAG = "GestureLockViewGroup";
/**
* 保存全部的GestureLockView
*/
private GestureLockView[] mGestureLockViews;
/**
* 每一个边上的GestureLockView的个数
*/
private int mCount = 4;
/**
* 存储答案
*/
private int[] mAnswer = { 0, 1, 2, 5, 8 };
/**
* 保存用户选中的GestureLockView的id
*/
private List<Integer> mChoose = new ArrayList<Integer>();

private Paint mPaint;
/**
* 每一个GestureLockView中间的间距 设置为：mGestureLockViewWidth * 25%
*/
private int mMarginBetweenLockView = 30;
/**
* GestureLockView的边长 4 * mWidth / ( 5 * mCount + 1 )
*/
private int mGestureLockViewWidth;

/**
* GestureLockView无手指触摸的状态下内圆的颜色
*/
private int mNoFingerInnerCircleColor = 0xFF939090;
/**
* GestureLockView无手指触摸的状态下外圆的颜色
*/
private int mNoFingerOuterCircleColor = 0xFFE0DBDB;
/**
* GestureLockView手指触摸的状态下内圆和外圆的颜色
*/
private int mFingerOnColor = 0xFF378FC9;
/**
* GestureLockView手指抬起的状态下内圆和外圆的颜色
*/
private int mFingerUpColor = 0xFFFF0000;

/**
* 宽度
*/
private int mWidth;
/**
* 高度
*/
private int mHeight;

private Path mPath;
/**
* 指引线的開始位置x
*/
private int mLastPathX;
/**
* 指引线的開始位置y
*/
private int mLastPathY;
/**
* 指引下的结束位置
*/
private Point mTmpTarget = new Point();

/**
* 最大尝试次数
*/
private int mTryTimes = 4;
/**
* 回调接口
*/
private OnGestureLockViewListener mOnGestureLockViewListener;

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

public GestureLockViewGroup(Context context, AttributeSet attrs,
int defStyle)
{
super(context, attrs, defStyle);
/**
* 获得全部自己定义的參数的值
*/
TypedArray a = context.getTheme().obtainStyledAttributes(attrs,
R.styleable.GestureLockViewGroup, defStyle, 0);
int n = a.getIndexCount();

for (int i = 0; i < n; i++)
{
int attr = a.getIndex(i);
switch (attr)
{
case R.styleable.GestureLockViewGroup_color_no_finger_inner_circle:
mNoFingerInnerCircleColor = a.getColor(attr,
mNoFingerInnerCircleColor);
break;
case R.styleable.GestureLockViewGroup_color_no_finger_outer_circle:
mNoFingerOuterCircleColor = a.getColor(attr,
mNoFingerOuterCircleColor);
break;
case R.styleable.GestureLockViewGroup_color_finger_on:
mFingerOnColor = a.getColor(attr, mFingerOnColor);
break;
case R.styleable.GestureLockViewGroup_color_finger_up:
mFingerUpColor = a.getColor(attr, mFingerUpColor);
break;
case R.styleable.GestureLockViewGroup_count:
mCount = a.getInt(attr, 3);
break;
case R.styleable.GestureLockViewGroup_tryTimes:
mTryTimes = a.getInt(attr, 5);
default:
break;
}
}

a.recycle();

// 初始化画笔
mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mPaint.setStyle(Paint.Style.STROKE);
// mPaint.setStrokeWidth(20);
mPaint.setStrokeCap(Paint.Cap.ROUND);
mPaint.setStrokeJoin(Paint.Join.ROUND);
// mPaint.setColor(Color.parseColor("#aaffffff"));
mPath = new Path();
}

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

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

// Log.e(TAG, mWidth + "");
// Log.e(TAG, mHeight + "");

mHeight = mWidth = mWidth < mHeight ? mWidth : mHeight;

// setMeasuredDimension(mWidth, mHeight);

// 初始化mGestureLockViews
if (mGestureLockViews == null)
{
mGestureLockViews = new GestureLockView[mCount * mCount];
// 计算每一个GestureLockView的宽度
mGestureLockViewWidth = (int) (4 * mWidth * 1.0f / (5 * mCount + 1));
//计算每一个GestureLockView的间距
mMarginBetweenLockView = (int) (mGestureLockViewWidth * 0.25);
// 设置画笔的宽度为GestureLockView的内圆直径略微小点（不喜欢的话。随便设）
mPaint.setStrokeWidth(mGestureLockViewWidth * 0.29f);

for (int i = 0; i < mGestureLockViews.length; i++)
{
//初始化每一个GestureLockView
mGestureLockViews[i] = new GestureLockView(getContext(),
mNoFingerInnerCircleColor, mNoFingerOuterCircleColor,
mFingerOnColor, mFingerUpColor);
mGestureLockViews[i].setId(i + 1);
//设置參数，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());
}
// 从第二行開始。设置为上一行同一位置View的以下
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;
/**
* 每一个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);
}

Log.e(TAG, "mWidth = " + mWidth + " ,  mGestureViewWidth = "
+ mGestureLockViewWidth + " , mMarginBetweenLockView = "
+ mMarginBetweenLockView);

}
}

@Override
public boolean onTouchEvent(MotionEvent event)
{
int action = event.getAction();
int x = (int) event.getX();
int y = (int) event.getY();

switch (action)
{
case MotionEvent.ACTION_DOWN:
// 重置
reset();
break;
case MotionEvent.ACTION_MOVE:
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);
child.setMode(Mode.STATUS_FINGER_ON);
if (mOnGestureLockViewListener != null)
mOnGestureLockViewListener.onBlockSelected(cId);
// 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)// 当前加入为第一个
{
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;
break;
case MotionEvent.ACTION_UP:

mPaint.setColor(mFingerUpColor);
mPaint.setAlpha(50);
this.mTryTimes--;

// 回调是否成功
if (mOnGestureLockViewListener != null && mChoose.size() > 0)
{
mOnGestureLockViewListener.onGestureEvent(checkAnswer());
if (this.mTryTimes == 0)
{
mOnGestureLockViewListener.onUnmatchedExceedBoundary();
}
}

Log.e(TAG, "mUnMatchExceedBoundary = " + mTryTimes);
Log.e(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
changeItemMode();

// 计算每一个元素中箭头须要旋转的角度
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);
}
break;

}
invalidate();
return true;
}

private void changeItemMode()
{
for (GestureLockView gestureLockView : mGestureLockViews)
{
if (mChoose.contains(gestureLockView.getId()))
{
gestureLockView.setMode(Mode.STATUS_FINGER_UP);
}
}
}

/**
*
* 做一些必要的重置
*/
private void reset()
{
mChoose.clear();
mPath.reset();
for (GestureLockView gestureLockView : mGestureLockViews)
{
gestureLockView.setMode(Mode.STATUS_NO_FINGER);
gestureLockView.setArrowDegree(-1);
}
}
/**
* 检查用户绘制的手势是否正确
* @return
*/
private boolean checkAnswer()
{
if (mAnswer.length != mChoose.size())
return false;

for (int i = 0; i < mAnswer.length; i++)
{
if (mAnswer[i] != mChoose.get(i))
return false;
}

return true;
}

/**
* 检查当前左边是否在child中
* @param child
* @param x
* @param y
* @return
*/
private boolean checkPositionInChild(View child, int x, int y)
{

//设置了内边距，即x,y必须落入下GestureLockView的内部中间的小区域中，能够通过调整padding使得x,y落入范围不变大。或者不设置padding
int padding = (int) (mGestureLockViewWidth * 0.15);

if (x >= child.getLeft() + padding && x <= child.getRight() - padding
&& y >= child.getTop() + padding
&& y <= child.getBottom() - padding)
{
return true;
}
return false;
}

/**
* 通过x,y获得落入的GestureLockView
* @param x
* @param y
* @return
*/
private GestureLockView getChildIdByPos(int x, int y)
{
for (GestureLockView gestureLockView : mGestureLockViews)
{
if (checkPositionInChild(gestureLockView, x, y))
{
return gestureLockView;
}
}

return null;

}

/**
* 设置回调接口
*
* @param listener
*/
public void setOnGestureLockViewListener(OnGestureLockViewListener listener)
{
this.mOnGestureLockViewListener = listener;
}

/**
* 对外发布设置答案的方法
*
* @param answer
*/
public void setAnswer(int[] answer)
{
this.mAnswer = answer;
}

/**
* 设置最大实验次数
*
* @param boundary
*/
public void setUnMatchExceedBoundary(int boundary)
{
this.mTryTimes = boundary;
}

@Override
public void dispatchDraw(Canvas canvas)
{
super.dispatchDraw(canvas);
//绘制GestureLockView间的连线
if (mPath != null)
{
canvas.drawPath(mPath, mPaint);
}
//绘制指引线
if (mChoose.size() > 0)
{
if (mLastPathX != 0 && mLastPathY != 0)
canvas.drawLine(mLastPathX, mLastPathY, mTmpTarget.x,
mTmpTarget.y, mPaint);
}

}

public interface OnGestureLockViewListener
{
/**
* 单独选中元素的Id
*
* @param position
*/
public void onBlockSelected(int cId);

/**
* 是否匹配
*
* @param matched
*/
public void onGestureEvent(boolean matched);

/**
* 超过尝试次数
*/
public void onUnmatchedExceedBoundary();
}
}

凝视极其具体。用极其只是分~主要就是onTouchEvent中对用户选择的GestureLockView进行推断，以及改变GestureLockView状态等。

5、布局文件

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:zhy="http://schemas.android.com/apk/res/com.zhy.zhy_gesturelockview"
android:layout_width="match_parent"
android:layout_height="match_parent" >

<com.zhy.zhy_gesturelockview.view.GestureLockViewGroup
android:id="@+id/id_gestureLockViewGroup"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#F2F2F7"
android:gravity="center_vertical"
zhy:count="3"
zhy:tryTimes="5" />
<!--   zhy:color_no_finger_inner_circle="#ff085D58"
zhy:color_no_finger_outer_circle="#ff08F0E0"
zhy:color_finger_on="#FF1734BF" -->

</RelativeLayout>

有兴趣的能够自己定义属性，把凝视的代码添进去即可，当然你也能够什么都不设置，单纯设置宽度和高度，我认为默认效果也是不错的 ~

6、调用

package com.zhy.zhy_gesturelockview;

import android.app.Activity;
import android.os.Bundle;
import android.widget.Toast;

import com.zhy.zhy_gesturelockview.view.GestureLockViewGroup;
import com.zhy.zhy_gesturelockview.view.GestureLockViewGroup.OnGestureLockViewListener;

public class MainActivity extends Activity
{

private GestureLockViewGroup mGestureLockViewGroup;

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

mGestureLockViewGroup = (GestureLockViewGroup) findViewById(R.id.id_gestureLockViewGroup);
mGestureLockViewGroup.setAnswer(new int[] { 1, 2, 3, 4,5 });
mGestureLockViewGroup
.setOnGestureLockViewListener(new OnGestureLockViewListener()
{

@Override
public void onUnmatchedExceedBoundary()
{
Toast.makeText(MainActivity.this, "错误5次...",
Toast.LENGTH_SHORT).show();
mGestureLockViewGroup.setUnMatchExceedBoundary(5);
}

@Override
public void onGestureEvent(boolean matched)
{
Toast.makeText(MainActivity.this, matched+"",
Toast.LENGTH_SHORT).show();
}

@Override
public void onBlockSelected(int cId)
{
}
});
}

}

调用是不是so easy。懒得看代码又须要用的，能够直接拿来使用。等哪天闲着蛋疼能够研究研究代码~

ok，有不论什么问题的留言～

源代码明天到公司贴出来吧。尼玛，这是拿手机共享的热点写的，我的流量啊~~~~还好是1号~

源代码点击下载