手势开锁在AndriodStudio中的应用
目录思路设置所需要的变量与常量设置所需要的设置与构造函数测量宽和高，计算绘制的间距绘制3*3小圆，保存绘制小圆的坐标绘制手势线条处理事件onTouchEvent效果图
目录
思路
一般来说，进行手势解锁的设置有两种思路，一种是使用boolean类型的数组来识别手势，一种是使用普通的3*3的int型数组来识别。我所讲的就是第二种，说白了就是把普通的密码锁换一种方式输入，比如在屏幕上你划了一个Z来解锁，而用密码锁就是7895123。话不多说，进入正题
设置所需要的变量与常量 ；设置所需要的设置与构造函数 ；测量宽和高，计算绘制的间距 ；绘制3*3小圆，保存绘制小圆的坐标 ；绘制手势线条；处理事件onTouchEvent ；
设置所需要的变量与常量
private int mWidth;//宽
private int mHeight;//高
private int circle_radius = 30;//小圆半径
private int cirle_radius_alw = 60;//容差
private int[][] unLockData = new int[3][3];//记录手势所代表的密码
private int horizontal_spac_circle;//水平间距
private int vertical_spac_circle;//垂直间距
private Map<String, Point> coordinateMap;//所有小圆点的坐标
private PointPacking startPoint;//画笔开始
private List<PointPacking> points = new ArrayList<>();
//坐标
private int moveX = -1;
private int moveY = -1;
private int drawX = -1;
private int drawY = -1;
/**
* 显示手势轨迹
*/
private boolean flag_show_gesture = true;
private int paint_circle_width = 3;//圆跟圆之间的长度
//用来绘制各类圆的样子
private Paint drawPointBgPaint = new Paint();//初始圆
private Paint drawPointSelectPoint = new Paint();//已选择的圆
private Paint drawLinePaint = new Paint();//连接圆的线
private OnUnLockListener listener;//监听类
设置所需要的设置与构造函数
//设置监听类
public void setListener(OnUnLockListener listener) {
this.listener = listener;
}
/**
* 设置是否显示手势轨迹
*/
public void setFlag_show_gesture(boolean flag_show_gesture) {
this.flag_show_gesture = flag_show_gesture;
}
//设置构造函数
public GestureUnLockView(Context context) {
this(context, null);
}
public GestureUnLockView(Context context, @Nullable AttributeSet attrs) {
this(context, attrs, 0);
}
public GestureUnLockView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
setLayerType(LAYER_TYPE_SOFTWARE, null);
initGestureUnLockView();
initPaint();
}
//绘制各类圆的样子
private void initPaint() {
drawPointBgPaint.setAntiAlias(true);
drawPointBgPaint.setColor(Color.parseColor("#a9dff9"));
drawPointSelectPoint.setAntiAlias(true);
drawPointSelectPoint.setColor(Color.parseColor("#08a3ee"));
drawLinePaint.setAntiAlias(true);
drawLinePaint.setColor(Color.parseColor("#08a3ee"));
drawLinePaint.setStyle(Paint.Style.FILL);
drawLinePaint.setStrokeWidth(5);
}
//初始化所有小圆点的坐标
private void initGestureUnLockView() {
coordinateMap = new HashMap<>();
}
测量宽和高，计算绘制的间距
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
final int widthSize = MeasureSpec.getSize(widthMeasureSpec);
final int heightSize = MeasureSpec.getSize(heightMeasureSpec);
mWidth = widthSize;//控件宽
mHeight = heightSize;//控件高
horizontal_spac_circle = (mWidth - unLockData[0].length * circle_radius * 2
- getPaddingLeft() - getPaddingRight() - cirle_radius_alw * 2 - paint_circle_width)
/ (unLockData[0].length - 1);//计算间距宽
vertical_spac_circle = (mHeight - unLockData.length * circle_radius * 2
- getPaddingTop() - getPaddingBottom() - cirle_radius_alw * 2 - paint_circle_width)
/ (unLockData.length - 1);//计算间距高
}
绘制3*3小圆，保存绘制小圆的坐标
/*
* 绘制小圆点
*
*/
private void drawCircle(Canvas canvas) {
coordinateMap.clear();
int count = 1;
for (int i = 0; i < unLockData.length; i++) {
for (int j = 0; j < unLockData[i].length; j++) {
int cx = horizontal_spac_circle * j + circle_radius + (circle_radius * 2 * j) + getPaddingLeft() + cirle_radius_alw + paint_circle_width;
int cy = vertical_spac_circle * i + circle_radius + (circle_radius * 2 * i) + getPaddingTop() + cirle_radius_alw + paint_circle_width;
canvas.drawCircle(cx, cy, circle_radius, drawPointBgPaint);
for (PointPacking point : points) {
if (cx == point.x && cy == point.y) {
drawPointSelectPoint.setStyle(Paint.Style.FILL);
drawPointSelectPoint.setShadowLayer(50, 0, 0, Color.parseColor("#aa08a3ee"));
canvas.drawCircle(cx, cy, circle_radius, drawPointSelectPoint);
drawPointSelectPoint.clearShadowLayer();
drawPointSelectPoint.setStyle(Paint.Style.STROKE);
drawPointSelectPoint.setStrokeWidth(paint_circle_width);
canvas.drawCircle(cx, cy, circle_radius + cirle_radius_alw, drawPointSelectPoint);
}
}
String key = String.valueOf(count);
Point point = new Point(cx, cy);
coordinateMap.put(key, point);
count++;
}
}
}
绘制手势线条
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
drawCircle(canvas);
if (flag_show_gesture) {
for (int i = 0; i < points.size(); i++) {
if (i == 0) {
drawX = points.get(0).x;
drawY = points.get(0).y;
} else {
canvas.drawLine(drawX, drawY, points.get(i).x, points.get(i).y, drawLinePaint);
drawX = points.get(i).x;
drawY = points.get(i).y;
}
}
if (moveX != -1 && moveY != -1 && points.size() > 0) {
canvas.drawLine(drawX, drawY, moveX, moveY, drawLinePaint);
}
}
}
处理事件onTouchEvent
@Override
public boolean onTouchEvent(MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
startPoint = judgmentPosition(event.getX(), event.getY());
if (startPoint != null) {
points.add(startPoint);
}
break;
case MotionEvent.ACTION_MOVE:
moveX = (int) event.getX();
moveY = (int) event.getY();
PointPacking point = judgmentPosition(moveX, moveY);
boolean flag = false;
if (point != null) {
if (startPoint == null) {
startPoint = point;
}
if (points.size() > 0) {
for (PointPacking p : points) {
if (point.x == p.x && point.y == p.y) {
flag = true;
break;
}
}
if (!flag) {
points.add(point);
}
}
}
postInvalidate();
break;
case MotionEvent.ACTION_UP:
moveX = -1;
moveY = -1;
postDelayed(new Runnable() {
@Override
public void run() {
if (listener != null && points.size() > 0) {
StringBuilder sb = new StringBuilder();
for (PointPacking p : points) {
sb.append(p.position);
}
listener.unLock(sb.toString());
}
startPoint = null;
points.clear();
postInvalidate();
}
}, 300);
postInvalidate();
break;
default:
break;
}
return true;
}
效果图
作者：张江霖 原文链接
