Android九宫格手势密码代码设计

package org.demo.custon_view; 
 
import android.content.Context; 
import android.graphics.Bitmap; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Matrix; 
import android.graphics.Paint; 
import android.util.AttributeSet; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.ImageView; 
 
/** 
 * @Title: SquaredPassWord.java 
 * @Description: 九宫格密码 
 * @author lhz 
 * @date 2013年9月16日 下午3:48:10 
 * @version V1.0 Copyright (c) 2013 Company,Inc. All Rights Reserved. 
 * 
 */ 
public class SquaredPassWord extends View { 
 ImageView i; 
 private int length;// 九宫格密码是正方形所以只要知道边长就可以 
 private Point[] points = new Point[9];// 九宫格节点 
 private Bitmap defualtPointMap = BitmapFactory.decodeResource(getResources(), R.drawable.locus_round_original);// 正常情况下点的位图 
 private int poitleght = defualtPointMap.getWidth();// 节点的边长；这里值考虑正方形状态 
 private Bitmap selectPointMap = BitmapFactory.decodeResource(getResources(), R.drawable.locus_round_click);// 选中情况下点的位图 
 private Point startPoint;// 起点 
 private Point tempPoint;// 临时存储上一个节点 
 private StringBuffer passWBuffer = new StringBuffer();// 保存轨迹顺序的密码 
 private Bitmap lineBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.locus_line); 
 private int lineBitmapheight = lineBitmap.getHeight(); 
 private double lineBitmapWidth = lineBitmap.getWidth(); 
 // 以下四个变量是为了绘制最后一个跟手指之间的连线 
 private int startX;// 移动起点X 
 private int startY;// 移动起点Y 
 private int moveX;// 正在移动的X 
 private int moveY;// 正在移动的Y 
 
 public SquaredPassWord(Context context) { 
  super(context); 
 
 } 
 
 public SquaredPassWord(Context context, AttributeSet attrs) { 
  super(context, attrs); 
 
 } 
 
 public SquaredPassWord(Context context, AttributeSet attrs, int defStyle) { 
  super(context, attrs, defStyle); 
 
 } 
 
 @Override 
 public boolean onTouchEvent(MotionEvent event) { 
  boolean flag = true; 
  switch (event.getAction()) { 
  case MotionEvent.ACTION_DOWN: 
   passWBuffer.delete(0, passWBuffer.length()); 
   int x = (int) event.getX(); 
   int y = (int) event.getY(); 
   for (Point point : points) { 
    if (point.isInMyArea(x, y)) { 
     point.setSelected(true); 
     tempPoint = startPoint = point; 
     startX = startPoint.getCenterX(); 
     startY = startPoint.getCenterY(); 
     passWBuffer.append(startPoint.getId()); 
    } 
   } 
   invalidate(); 
   break; 
  case MotionEvent.ACTION_MOVE: 
   moveX = (int) event.getX(); 
   moveY = (int) event.getY(); 
   for (Point point : points) { 
    if (point.isInMyArea(moveX, moveY) && !point.isSelected()) { 
     tempPoint.setNextID(point.getId()); 
     point.setSelected(true); 
     tempPoint = point; 
     startX = tempPoint.getCenterX(); 
     startY = tempPoint.getCenterY(); 
     passWBuffer.append(tempPoint.getId()); 
    } 
   } 
   invalidate(); 
   break; 
  case MotionEvent.ACTION_UP: 
   reSetData(); 
   startX = startY = moveX = moveY = 0; 
   invalidate(); 
   flag = false; 
   break; 
 
  default: 
   break; 
  } 
  return flag; 
 } 
 
 /** 
  * 回复各个点到初始状态 
  */ 
 private void reSetData() { 
  for (Point point : points) { 
   point.setSelected(false); 
   point.setNextID(point.getId()); 
  } 
 } 
 
 @Override 
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
  // TODO Auto-generated method stub 
  int width = getWidth() - getPaddingLeft() - getPaddingRight(); 
  int height = getHeight() - getPaddingTop() - getPaddingBottom(); 
  length = (width 0)){ 
    
  } 
  System.out.println(length); 
  initPionts(points); 
  super.onMeasure(widthMeasureSpec, heightMeasureSpec); 
 } 
 
 @Override 
 protected void onDraw(Canvas canvas) { 
  // TODO Auto-generated method stub 
  if (moveX != 0 && moveY != 0 && startX != 0 && startY != 0) { 
   // 绘制当前活动的线段 
   drawLine(startX, startY, moveX, moveY, canvas); 
  } 
  drawLinePoint(canvas); 
  super.onDraw(canvas); 
 } 
 
 /** 
  * 初始各节点 
  * 
  * @param pionts 
  */ 
 @SuppressWarnings("null") 
 private void initPionts(Point[] points) { 
  int spacing = (length - poitleght * 3) / 2; 
 
  if (points == null && points.length != 9) {// 只做九宫格的处理 
   return; 
  } else { 
   for (int i = 0; i <9; i++) { 
    int row = i / 3;// 行数 
    int column = i % 3;// 列数；求整取余 
 
    int x = (poitleght + spacing) * column + getPaddingLeft();// x坐标 
    int y = (poitleght + spacing) * row + getPaddingTop();// y坐标 
    Point point = new Point((i + 1), x, y, poitleght); 
    points[i] = point; 
   } 
  } 
 } 
 
 /** 
  * 绘制各节点以及被选择的个节点之间的连线轨迹 
  * 
  * @param canvas 
  */ 
 private void drawLinePoint(Canvas canvas) { 
  if (startPoint != null) { 
   drawP2POrbit(startPoint, canvas); 
  } 
  Paint paint = null;// new Paint(); 
  // 绘制每个点的图片 
  for (Point point : points) { 
   if (point.isSelected()) {// 绘制大圈 
    canvas.drawBitmap(selectPointMap, point.getX(), point.getY(), paint); 
   } else { 
    canvas.drawBitmap(defualtPointMap, point.getX(), point.getY(), paint); 
   } 
  } 
 } 
 
 /** 
  * 绘制点与点之间的轨迹 
  * 
  * @param canvas 
  */ 
 private void drawP2POrbit(Point point, Canvas canvas) { 
  if (point.getId() != point.nextID) { 
   // canvas.concat(matrix); 
   Point endPoint = null; 
   // 获取目标节点 
   for (Point point3 : points) { 
    if (point3.getId() == point.getNextID()) { 
     endPoint = point3; 
     break; 
    } 
   } 
   if (endPoint != null) { 
    // 画线 
    drawLine(point.getCenterX(), point.getCenterY(), endPoint.getCenterX(), endPoint.getCenterY(), canvas); 
    // 递归 
    drawP2POrbit(endPoint, canvas); 
   } 
  } 
 } 
 
 /** 
  * 画连线 
  * 
  * @param startX 
  *   起点X 
  * @param startY 
  *   起点Y 
  * @param stopX 
  *   终点X 
  * @param stopY 
  *   终点Y 
  * @param canvas 
  */ 
 private void drawLine(int startX, int startY, int stopX, int stopY, Canvas canvas) { 
  Paint paint = new Paint(); 
  // 获得斜边长度 
  double hypotenuse = Math.hypot((stopX - startX), (stopY - startY)); 
  // double side = stopX - startX;// 邻边 
  // double piAngle = Math.acos(side / hypotenuse);// pi角度 
  // float rotate = (float) (180 / Math.PI * piAngle);// 转换的角度 
  float rotate = getDegrees(startX, startY, stopX, stopY); 
  Matrix matrix = new Matrix(); 
  // matrix.postRotate(rotate);//不能用这个matritx 来选择角度只能用 让canvas懒选择 
    // 用matrix的话会引起图片所表示的线条不在中心点上 
    canvas.rotate(rotate, startX, startY); 
  matrix.preTranslate(0, 0); 
  matrix.setScale((float) (hypotenuse / lineBitmapWidth), 1.0f); 
  matrix.postTranslate(startX, startY - lineBitmapheight / 2.f); 
  canvas.drawBitmap(lineBitmap, matrix, paint); 
  canvas.rotate(-rotate, startX, startY);//恢复 
  canvas.save(); 
 
//  Paint paint1 = new Paint(); 
//  paint1.setColor(Color.BLACK); 
//  paint1.setStrokeWidth(8);// 粗细 
//  paint1.setFlags(Paint.ANTI_ALIAS_FLAG); 
//  canvas.drawLine(startX, startY, stopX, stopY, paint1); 
 
 } 
 
 /** 
  * 获取角度 
  * 
  * @param startX 
  *   起点X 
  * @param startY 
  *   起点Y 
  * @param stopX 
  *   终点X 
  * @param stopY 
  *   终点Y 
  */ 
 private float getDegrees(int startX, int startY, int stopX, int stopY) { 
  // 获得斜边长度 
  double hypotenuse = Math.hypot((stopX - startX), (stopY - startY)); 
  double side = stopX - startX;// 邻边 
  double piAngle = Math.acos(side / hypotenuse);// pi角度 
  float rotate = (float) (180 / Math.PI * piAngle);// 转换的角度（0--180); 
  if (stopY - startY <0) {// 如果Y愁小于0说明角度在第三或者第四像限 
   rotate = 360 - rotate; 
  } 
  return rotate; 
 } 
 
 /** 
  * 轨迹顺序密码 
  * 
  * @return 
  */ 
 public String getOrbitString() { 
  return (passWBuffer == null &＃63; null : passWBuffer.toString()); 
 } 
 
 /** 
  * 表示一个点 
  * 
  * @author lanhaizhong 
  * 
  */ 
 class Point { 
 
  private int id;// 点的id 
  private int nextID;// 连向下一个借点的id 
  private int x;// 点的左上角x坐标 
  private int y;// 点的左上角的y坐标 
  private boolean isSelected;// 该节点是否被选中 
  private int width;// 点的长度 这里只考虑正方形 
 
  public Point() { 
   super(); 
   // TODO Auto-generated constructor stub 
  } 
 
  public int getId() { 
   return id; 
  } 
 
  public void setId(int id) { 
   this.id = id; 
  } 
 
  public int getNextID() { 
   return nextID; 
  } 
 
  public void setNextID(int nextID) { 
   this.nextID = nextID; 
  } 
 
  public int getX() { 
   return x; 
  } 
 
  public void setX(int x) { 
   this.x = x; 
  } 
 
  public int getY() { 
   return y; 
  } 
 
  public void setY(int y) { 
   this.y = y; 
  } 
 
  public boolean isSelected() { 
   return isSelected; 
  } 
 
  public void setSelected(boolean isSelected) { 
   this.isSelected = isSelected; 
  } 
 
  public int getWidth() { 
   return width; 
  } 
 
  public void setWidth(int width) { 
   this.width = width; 
  } 
 
  public Point(int id, int x, int y, int width) { 
   super(); 
   this.id = id; 
   this.x = x; 
   this.y = y; 
   this.nextID = id; 
   this.isSelected = false; 
   this.width = width; 
  } 
 
  public int getCenterX() { 
   return x + (width / 2); 
  } 
 
  private int getCenterY() { 
   return y + (width / 2); 
  } 
 
  /** 
   * 判断某个坐标是否这个这个表示一个点的图形区域内 
   * 
   * @param x 
   * @param y 
   * @return 
   */ 
  public boolean isInMyArea(int x, int y) { 
 
   // return (this.x