如果你的程序里面要添加手势锁，那么这个源码是不个不错的选择。
今天偶遇以github上gesturelock关于手势锁的一个例子（有兴趣的去搜索下看看），于是下载下来研究，无奈基本没有注释，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，加入一些基本的自定义属性，在此先感谢这位兄弟~。
先上图，默认效果图：

当然可以自定义数量啊，颜色神马的，自定义效果图：

如果你有艺术细胞，可以给我推荐几个颜色，无奈个人审美有问题~

1、整体思路

a、自定义了一个RelativeLayout(GestureLockViewGroup)在里面会根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，只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，会根据这三个状态绘制不同的效果，以及抬起时的小箭头需要旋转的角度，会根据用户选择的GestureLockView，进行计算，在GestureLockViewGroup为每个GestureLockView设置
c、GestureLockViewGroup主要就是判断用户ACTION_MOVE，ACTION_DOWN ， ACTION_UP时改变选中的GestureLockView的状态，并且记录下来，提供一定的回调。
下面开始看代码：

2、声明一些用户可以设置的属性：

用户可以用过在xml文件中设置这些属性，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，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);
	}
	@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;
	}
}

注释很详细，主要就是onDraw时，判断当前状态，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;
/**
 * 整体包含n*n个GestureLockView,每个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";
	/**
	 * 保存所有的GestureLockView
	 */
	private GestureLockView[] mGestureLockViews;
	/**
	 * 每个边上的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 mChoose = new ArrayList();
	private Paint mPaint;
	/**
	 * 每个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;
	/**
	 * 指引线的开始位置x
	 */
	private int mLastPathX;
	/**
	 * 指引线的开始位置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);
		/**
		 * 获得所有自定义的参数的值
		 */
		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（不喜欢的话，随便设）
			mPaint.setStrokeWidth(mGestureLockViewWidth * 0.29f);
			for (int i = 0; i < mGestureLockViews.length; i++)
			{
				//初始化每个GestureLockView
				mGestureLockViews[i] = new GestureLockView(getContext(),
						mNoFingerInnerCircleColor, mNoFingerOuterCircleColor,
						mFingerOnColor, mFingerUpColor);
				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);
			}
			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;
			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);
			}
			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，可以通过调整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;
	}
	/**
	 * 对外公布设置答案的方法
	 * 
	 * @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();
	}
}

注释极其详细，用极其不过分~主要就是onTouchEvent中对用户选择的GestureLockView进行判断，以及改变GestureLockView状态等。

5、布局文件

有兴趣的可以自定义属性，把注释的代码添进去就行，当然你也可以什么都不设置，单纯设置宽度和高度，我觉得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，懒得看代码又需要用的，可以直接拿来使用，等哪天闲着蛋疼可以研究研究代码~
项目下载地址:zhy_gestureLockView

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