如何在AndroidStudio中使用手势解锁
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 coordinateMap;//所有小圆点的坐标
private PointPacking startPoint;//画笔开始
private List 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