接着第一个Android UI手势密码设计的基础上继续改进，效果图如下
activity_main.xml
<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>
MainActivity
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"); } } }
LockPatterView
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; } } }
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