Android自定义UI手势密码改进版

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  tools:context=".MainActivity" >   <TextView  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:gravity="center"  android:text="请输入密码"  android:id="@+id/text"  />   <com.example.lockpatterview.LockPatterView  android:id="@+id/lock"  android:layout_weight="1"  android:layout_width="match_parent"  android:layout_height="0dp" />  </LinearLayout> 

package com.example.lockpatterview;  import com.example.lockpatterview.LockPatterView.OnPatterChangeLister;  import android.os.Bundle; import android.text.TextUtils; import android.widget.TextView; import android.widget.Toast; import android.app.Activity;  public class MainActivity extends Activity implements OnPatterChangeLister {   LockPatterView lock;  TextView text;  String p = "14789";   @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  text = (TextView) findViewById(R.id.text);  lock = (LockPatterView) findViewById(R.id.lock);  lock.SetOnPatterChangeLister(this);  }   @Override  public void onPatterChange(String passwordStr) {  if (!TextUtils.isEmpty(passwordStr)) {   if (passwordStr.equals(p)) {   text.setText(passwordStr);   } else {   text.setText("密码错误");   lock.errorPoint();   }  }else {   Toast.makeText(MainActivity.this, "至少连接5点", 0).show();  }   }   @Override  public void onPatterStart(boolean isStart) {  if (isStart) {   text.setText("请绘制图案");  }  }  } 

package com.example.lockpatterview;  import java.util.ArrayList; import java.util.List;  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.text.TextUtils; import android.util.AttributeSet; import android.view.MotionEvent; import android.view.View;  public class LockPatterView extends View {   private static final int POINT_SIZE = 5;   private Point[][] points = new Point[3][3];   private Matrix matrix = new Matrix();   private float width, height, offstartY, moveX, moveY;;   private Bitmap bitmap_pressed, bitmap_normal, bitmap_error, bitmap_line,   bitmap_line_error;   private Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);   private List<Point> pointList = new ArrayList<LockPatterView.Point>();   private OnPatterChangeLister onPatterChangeLister;   /**  * 构造函数  */  public LockPatterView(Context context, AttributeSet attrs, int defStyle) {  super(context, attrs, defStyle);  }   public LockPatterView(Context context, AttributeSet attrs) {  super(context, attrs);  }   public LockPatterView(Context context) {  super(context);  }   /*********************************************************  * 绘制9宫格  * movePoint代表鼠标在移动，但是不是9宫格里面的点  * isInit是否初始化过9个点  * isSelect 点位是否被选中状态  * isFinish 是否绘制完毕  */  private boolean isInit, isSelect, isFinish, movePoint;   @Override  protected void onDraw(Canvas canvas) {  // 第一次没有初始化就进行初始化，一旦初始化就不在初始化工作了，isInit的意思是---默认没有初始化过  if (!isInit) {   // 初始化9个点   initPoints();  }  // 绘制9个点  points2Canvas(canvas);   if (pointList.size() > 0) {   Point a = pointList.get(0);   // 绘制九宫格坐标点   for (int i = 0; i < pointList.size(); i++) {   Point b = pointList.get(i);   line2Canvas(canvas, a, b);   a = b;   }   // 绘制鼠标坐标点   if (movePoint) {   line2Canvas(canvas, a, new Point(moveX, moveY));   }  }  }   /**  * 初始化9个点位 获取点位的3种状态 线的2种状态 以及9点的坐标位置 以及初始化密码操作 isInit=  * true设置状态--下次不必初始化话工作了  */  private void initPoints() {   // 获取布局宽高  width = getWidth();  height = getHeight();   // 横屏和竖屏   offstartY = (height - width) / 2;   // 图片资源  bitmap_normal = BitmapFactory.decodeResource(getResources(),   R.drawable.btn_circle_normal);  bitmap_pressed = BitmapFactory.decodeResource(getResources(),   R.drawable.btn_circle_pressed);  bitmap_error = BitmapFactory.decodeResource(getResources(),   R.drawable.btn_circle_selected);  bitmap_line = BitmapFactory.decodeResource(getResources(),   R.drawable.ddd);  bitmap_line_error = BitmapFactory.decodeResource(getResources(),   R.drawable.qqq);   points[0][0] = new Point(width / 4, offstartY + width / 4);  points[0][1] = new Point(width / 2, offstartY + width / 4);  points[0][2] = new Point(width / 4 * 3, offstartY + width / 4);   points[1][0] = new Point(width / 4, offstartY + width / 4 * 2);  points[1][1] = new Point(width / 2, offstartY + width / 4 * 2);  points[1][2] = new Point(width / 4 * 3, offstartY + width / 4 * 2);   points[2][0] = new Point(width / 4, offstartY + width / 4 * 3);  points[2][1] = new Point(width / 2, offstartY + width / 4 * 3);  points[2][2] = new Point(width / 4 * 3, offstartY + width / 4 * 3);   // 设置密码1--9  int index = 1;  for (Point[] points : this.points) {   for (Point point : points) {   point.index = index;   index++;   }  }  // 初始化完成  isInit = true;  }   /**  * 将9个点绘制到画布 循环遍历9个点位， 根据3种不同的状态绘制3种不同的9个点位  */  private void points2Canvas(Canvas canvas) {  // 循环遍历9个点位  for (int i = 0; i < points.length; i++) {   // 循环遍历每行的3个点位   for (int j = 0; j < points[i].length; j++) {   // 获取依次的某个点位   Point point = points[i][j];   if (point.state == Point.STATE_PRESSED) {    // (Bitmap bitmap, float left, float top, Paint paint)    canvas.drawBitmap(bitmap_pressed,     point.x - bitmap_normal.getWidth() / 2, point.y      - bitmap_normal.getHeight() / 2, paint);   } else if (point.state == Point.STATE_ERROR) {    canvas.drawBitmap(bitmap_error,     point.x - bitmap_normal.getWidth() / 2, point.y      - bitmap_normal.getHeight() / 2, paint);   } else {    canvas.drawBitmap(bitmap_normal,     point.x - bitmap_normal.getWidth() / 2, point.y      - bitmap_normal.getHeight() / 2, paint);   }   }  }  }   /**  * 画线  */  public void line2Canvas(Canvas canvas, Point a, Point b) {  // 线的长度--2点之间的距离  float linelength = (float) Point.distance(a, b);  // 获取2点之间的角度  float degress = getDegrees(a, b);  //根据a点进行旋转  canvas.rotate(degress, a.x, a.y);   if (a.state == Point.STATE_PRESSED) {   // xy方向上的缩放比例   matrix.setScale(linelength / bitmap_line.getWidth(), 1);   matrix.postTranslate(a.x - bitmap_line.getWidth() / 2, a.y    - bitmap_line.getHeight() / 2);   canvas.drawBitmap(bitmap_line, matrix, paint);  } else {   matrix.setScale(linelength / bitmap_line.getWidth(), 1);   matrix.postTranslate(a.x - bitmap_line.getWidth() / 2, a.y    - bitmap_line.getHeight() / 2);   canvas.drawBitmap(bitmap_line_error, matrix, paint);  }  //画线完毕回归角度  canvas.rotate(-degress, a.x, a.y);  }   // 获取角度  public float getDegrees(Point pointA, Point pointB) {  return (float) Math.toDegrees(Math.atan2(pointB.y - pointA.y, pointB.x   - pointA.x));  }   /****************************************************************************  * onTouch事件处理  */   @Override  public boolean onTouchEvent(MotionEvent event) {  moveX = event.getX();  moveY = event.getY();   movePoint = false;  isFinish = false;   Point point = null;   switch (event.getAction()) {  //只要按下操作，就代表重新绘制界面  case MotionEvent.ACTION_DOWN:   if (onPatterChangeLister != null) {   onPatterChangeLister.onPatterStart(true);   }   // 每次按下，都需要清空之前的集合   resetPoint();   // 检测是不是在九宫格内   point = chechSelectPoint();   if (point != null) {   //如果按下的位置在9宫格内，就改成状态为true   isSelect = true;   }   break;  case MotionEvent.ACTION_MOVE:   if (isSelect) {   // 检测是不是在九宫格内   point = chechSelectPoint();   if (point == null) {    movePoint = true;   }   }   break;  case MotionEvent.ACTION_UP:   //绘制完毕，点位状态改为未选中   isFinish = true;   isSelect = false;   break;   }  // 如果没有绘制完毕，如果九宫格处于选中状态  if (!isFinish && isSelect && point != null) {   // 交叉点   if (crossPoint(point)) {   movePoint = true;   } else {// 新点   point.state = Point.STATE_PRESSED;   pointList.add(point);   }  }   // 绘制结束  if (isFinish) {   // 绘制不成立   if (pointList.size() == 1) {   // resetPoint();   errorPoint();   } else if (pointList.size() < POINT_SIZE && pointList.size() > 0) {// 绘制错误   errorPoint();   if (onPatterChangeLister != null) {    onPatterChangeLister.onPatterChange(null);   }   } else {   if (onPatterChangeLister != null) {    String pass = "";    for (int i = 0; i < pointList.size(); i++) {    pass = pass + pointList.get(i).index;    }    if (!TextUtils.isEmpty(pass)) {    onPatterChangeLister.onPatterChange(pass);    }   }   }  }   postInvalidate();  return true;  }   /**  * 重新绘制  */  public void resetPoint() {  for (int i = 0; i < pointList.size(); i++) {   Point point = pointList.get(i);   point.state = Point.STATE_NORMAL;  }  pointList.clear();  }   /**  * 检查是否选中  */  private Point chechSelectPoint() {  for (int i = 0; i < points.length; i++) {   for (int j = 0; j < points[i].length; j++) {   Point point = points[i][j];   if (Point.with(point.x, point.y, bitmap_normal.getWidth() / 2,    moveX, moveY)) {    return point;   }   }  }   return null;  }   /**  * 交叉点  */  private boolean crossPoint(Point point) {  if (pointList.contains(point)) {   return true;  } else {   return false;  }  }   /**  * 绘制错误  */  public void errorPoint() {  for (Point point : pointList) {   point.state = Point.STATE_ERROR;  }  }   /***********************************************************************  * 自定义的点  */  public static class Point {  // 正常  public static int STATE_NORMAL = 0;  // 选中  public static int STATE_PRESSED = 1;  // 错误  public static int STATE_ERROR = 2;  public float x, y;  public int index = 0, state = 0;   public Point() {  };   public Point(float x, float y) {   this.x = x;   this.y = y;  }   /**   * 两点之间的距离   */  public static double distance(Point a, Point b) {   return Math.sqrt(Math.abs(a.x - b.x) * Math.abs(a.x - b.x)    + Math.abs(a.y - b.y) * Math.abs(a.y - b.y));  }   /**   */  public static boolean with(float paintX, float pointY, float r,   float moveX, float moveY) {   return Math.sqrt((paintX - moveX) * (paintX - moveX)    + (pointY - moveY) * (pointY - moveY)) < r;  }  }   /**  * 图案监听器  */  public static interface OnPatterChangeLister {  void onPatterChange(String passwordStr);   void onPatterStart(boolean isStart);  }   /**  * 设置图案监听器  */  public void SetOnPatterChangeLister(OnPatterChangeLister changeLister) {  if (changeLister != null) {   this.onPatterChangeLister = changeLister;  }  } }