今天就跟大家聊聊有关使用android怎么实现九宫格手势密码，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
1. point.Java 点的位置
/**
* 点位置
*/
public class Point {
public static int STATE_NORMAL = 0;
public static int STATE_CHECK = 1; //
public static int STATE_CHECK_ERROR = 2; //
public float x;
public float y;
public int state = 0;
public int index = 0;//
public Point() {
}
public Point(float x, float y, int value) {
this.x = x;
this.y = y;
index = value;
}
public int getColNum() {
return (index - 1) % 3;
}
public int getRowNum() {
return (index - 1) / 3;
}
}2. MathUtil.java 计算两点之间的距离
public class MathUtil {
/**
*
* @param x1
* @param y1
* @param x2
* @param y2
* @return
*/
public static double distance(double x1, double y1, double x2, double y2) {
return Math.sqrt(Math.abs(x1 - x2) * Math.abs(x1 - x2)
+ Math.abs(y1 - y2) * Math.abs(y1 - y2));
}
/**
*
* @param x
* @param y
* @return
*/
public static double pointTotoDegrees(double x, double y) {
return Math.toDegrees(Math.atan2(x, y));
}
public static boolean checkInRound(float sx, float sy, float r, float x,
float y) {
return Math.sqrt((sx - x) * (sx - x) + (sy - y) * (sy - y)) < r;
}
}3. LocusPassWordView.java 九宫格自定义控件
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Paint.Style;
import android.graphics.Path;
import android.util.AttributeSet;
import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.widget.Toast;
import com.example.esop.util.MathUtil;
import com.example.esop.util.Point;
import java.util.ArrayList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;
public class LocusPassWordView extends View {
private float width = 0;
private float height = 0;
//
private boolean isCache = false;
//
private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
//
private Point[][] mPoints = new Point[3][3];
//
private float dotRadius = 0;
//
private List<Point> sPoints = new ArrayList<Point>();
private boolean checking = false;
private long CLEAR_TIME = 1000;
private int pwdMaxLen = 9;
private int pwdMinLen = 4;
private boolean isTouch = true;
private Paint arrowPaint;
private Paint linePaint;
private Paint selectedPaint;
private Paint errorPaint;
private Paint normalPaint;
private int errorColor = 0xffea0945;
private int selectedColor = 0xff0596f6;
private int outterSelectedColor = 0xff8cbad8;
private int outterErrorColor = 0xff901032;
private int dotColor = 0xffd9d9d9;
private int outterDotColor = 0xff929292;
public LocusPassWordView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public LocusPassWordView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public LocusPassWordView(Context context) {
super(context);
}
@Override
public void onDraw(Canvas canvas) {
if (!isCache) {
initCache();
}
drawToCanvas(canvas);
}
private void drawToCanvas(Canvas canvas) {
boolean inErrorState = false;
for (int i = 0; i < mPoints.length; i++) {
for (int j = 0; j < mPoints[i].length; j++) {
Point p = mPoints[i][j];
if (p.state == Point.STATE_CHECK) {
selectedPaint.setColor(outterSelectedColor);
canvas.drawCircle(p.x, p.y, dotRadius, selectedPaint);
selectedPaint.setColor(selectedColor);
canvas.drawCircle(p.x, p.y, dotRadius/4, selectedPaint);
} else if (p.state == Point.STATE_CHECK_ERROR) {
inErrorState = true;
errorPaint.setColor(outterErrorColor);
canvas.drawCircle(p.x, p.y, dotRadius, errorPaint);
errorPaint.setColor(errorColor);
canvas.drawCircle(p.x, p.y, dotRadius/4, errorPaint);
} else {
normalPaint.setColor(dotColor);
canvas.drawCircle(p.x, p.y, dotRadius, normalPaint);
normalPaint.setColor(outterDotColor);
canvas.drawCircle(p.x, p.y, dotRadius/4, normalPaint);
}
}
}
if (inErrorState) {
arrowPaint.setColor(errorColor);
linePaint.setColor(errorColor);
} else {
arrowPaint.setColor(selectedColor);
linePaint.setColor(selectedColor);
}
if (sPoints.size() > 0) {
int tmpAlpha = mPaint.getAlpha();
Point tp = sPoints.get(0);
for (int i = 1; i < sPoints.size(); i++) {
Point p = sPoints.get(i);
drawLine(tp, p, canvas, linePaint);
drawArrow(canvas, arrowPaint, tp, p, dotRadius/4, 38);
tp = p;
}
if (this.movingNoPoint) {
drawLine(tp, new Point(moveingX, moveingY, -1), canvas, linePaint);
}
mPaint.setAlpha(tmpAlpha);
}
}
private void drawLine(Point start, Point end, Canvas canvas, Paint paint) {
double d = MathUtil.distance(start.x, start.y, end.x, end.y);
float rx = (float) ((end.x-start.x) * dotRadius / 4 / d);
float ry = (float) ((end.y-start.y) * dotRadius / 4 / d);
canvas.drawLine(start.x+rx, start.y+ry, end.x-rx, end.y-ry, paint);
}
private void drawArrow(Canvas canvas, Paint paint, Point start, Point end, float arrowHeight, int angle) {
double d = MathUtil.distance(start.x, start.y, end.x, end.y);
float sin_B = (float) ((end.x - start.x) / d);
float cos_B = (float) ((end.y - start.y) / d);
float tan_A = (float) Math.tan(Math.toRadians(angle));
float h = (float) (d - arrowHeight - dotRadius * 1.1);
float l = arrowHeight * tan_A;
float a = l * sin_B;
float b = l * cos_B;
float x0 = h * sin_B;
float y0 = h * cos_B;
float x1 = start.x + (h + arrowHeight) * sin_B;
float y1 = start.y + (h + arrowHeight) * cos_B;
float x2 = start.x + x0 - b;
float y2 = start.y + y0 + a;
float x3 = start.x + x0 + b;
float y3 = start.y + y0 - a;
Path path = new Path();
path.moveTo(x1, y1);
path.lineTo(x2, y2);
path.lineTo(x3, y3);
path.close();
canvas.drawPath(path, paint);
}
private void initCache() {
width = this.getWidth();
height = this.getHeight();
float x = 0;
float y = 0;
if (width > height) {
x = (width - height) / 2;
width = height;
} else {
y = (height - width) / 2;
height = width;
}
int leftPadding = 15;
float dotPadding = width / 3 - leftPadding;
float middleX = width / 2;
float middleY = height / 2;
mPoints[0][0] = new Point(x + middleX - dotPadding, y + middleY - dotPadding, 1);
mPoints[0][1] = new Point(x + middleX, y + middleY - dotPadding, 2);
mPoints[0][2] = new Point(x + middleX + dotPadding, y + middleY - dotPadding, 3);
mPoints[1][0] = new Point(x + middleX - dotPadding, y + middleY, 4);
mPoints[1][1] = new Point(x + middleX, y + middleY, 5);
mPoints[1][2] = new Point(x + middleX + dotPadding, y + middleY, 6);
mPoints[2][0] = new Point(x + middleX - dotPadding, y + middleY + dotPadding, 7);
mPoints[2][1] = new Point(x + middleX, y + middleY + dotPadding, 8);
mPoints[2][2] = new Point(x + middleX + dotPadding, y + middleY + dotPadding, 9);
Log.d("jerome", "canvas width:"+width);
dotRadius = width / 10;
isCache = true;
initPaints();
}
private void initPaints() {
arrowPaint = new Paint();
arrowPaint.setColor(selectedColor);
arrowPaint.setStyle(Style.FILL);
arrowPaint.setAntiAlias(true);
linePaint = new Paint();
linePaint.setColor(selectedColor);
linePaint.setStyle(Style.STROKE);
linePaint.setAntiAlias(true);
linePaint.setStrokeWidth(dotRadius / 9);
selectedPaint = new Paint();
selectedPaint.setStyle(Style.STROKE);
selectedPaint.setAntiAlias(true);
selectedPaint.setStrokeWidth(dotRadius / 6);
errorPaint = new Paint();
errorPaint.setStyle(Style.STROKE);
errorPaint.setAntiAlias(true);
errorPaint.setStrokeWidth(dotRadius / 6);
normalPaint = new Paint();
normalPaint.setStyle(Style.STROKE);
normalPaint.setAntiAlias(true);
normalPaint.setStrokeWidth(dotRadius / 9);
}
/**
*
*
* @param index
* @return
*/
public int[] getArrayIndex(int index) {
int[] ai = new int[2];
ai[0] = index / 3;
ai[1] = index % 3;
return ai;
}
/**
* @param x
* @param y
* @return
*/
private Point checkSelectPoint(float x, float y) {
for (int i = 0; i < mPoints.length; i++) {
for (int j = 0; j < mPoints[i].length; j++) {
Point p = mPoints[i][j];
if (MathUtil.checkInRound(p.x, p.y, dotRadius, (int) x, (int) y)) {
return p;
}
}
}
return null;
}
/**
*
*/
private void reset() {
for (Point p : sPoints) {
p.state = Point.STATE_NORMAL;
}
sPoints.clear();
this.enableTouch();
}
/**
*
*
* @param p
* @return
*/
private int crossPoint(Point p) {
// reset
if (sPoints.contains(p)) {
if (sPoints.size() > 2) {
//
if (sPoints.get(sPoints.size() - 1).index != p.index) {
return 2;
}
}
return 1; //
} else {
return 0; //
}
}
/**
*
*
* @param point
*/
private void addPoint(Point point) {
if (sPoints.size() > 0) {
Point lastPoint = sPoints.get(sPoints.size() - 1);
int dx = Math.abs(lastPoint.getColNum() - point.getColNum());
int dy = Math.abs(lastPoint.getRowNum() - point.getRowNum());
if ((dx > 1 || dy > 1) && (dx == 0 || dy == 0 || dx == dy)) {
// if ((dx > 1 || dy > 1) && (dx != 2 * dy) && (dy != 2 * dx)) {
int middleIndex = (point.index + lastPoint.index) / 2 - 1;
Point middlePoint = mPoints[middleIndex / 3][middleIndex % 3];
if (middlePoint.state != Point.STATE_CHECK) {
middlePoint.state = Point.STATE_CHECK;
sPoints.add(middlePoint);
}
}
}
this.sPoints.add(point);
}
/**
* @param
* @return
*/
private String toPointString() {
if (sPoints.size() >= pwdMinLen && sPoints.size() <= pwdMaxLen) {
StringBuffer sf = new StringBuffer();
for (Point p : sPoints) {
sf.append(p.index);
}
return sf.toString();
} else {
return "";
}
}
boolean movingNoPoint = false;
float moveingX, moveingY;
@Override
public boolean onTouchEvent(MotionEvent event) {
//
if (!isTouch) {
return false;
}
movingNoPoint = false;
float ex = event.getX();
float ey = event.getY();
boolean isFinish = false;
boolean redraw = false;
Point p = null;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN: //
//
if (task != null) {
task.cancel();
task = null;
Log.d("task", "touch cancel()");
}
//
reset();
p = checkSelectPoint(ex, ey);
if (p != null) {
checking = true;
}
break;
case MotionEvent.ACTION_MOVE:
if (checking) {
p = checkSelectPoint(ex, ey);
if (p == null) {
movingNoPoint = true;
moveingX = ex;
moveingY = ey;
}
}
break;
case MotionEvent.ACTION_UP:
p = checkSelectPoint(ex, ey);
checking = false;
isFinish = true;
break;
}
if (!isFinish && checking && p != null) {
int rk = crossPoint(p);
if (rk == 2) //
{
// reset();
// checking = false;
movingNoPoint = true;
moveingX = ex;
moveingY = ey;
redraw = true;
} else if (rk == 0) //
{
p.state = Point.STATE_CHECK;
addPoint(p);
redraw = true;
}
// rk == 1
}
//
if (redraw) {
}
if (isFinish) {
if (this.sPoints.size() == 1) {
this.reset();
} else if (sPoints.size() < pwdMinLen || sPoints.size() > pwdMaxLen) {
// mCompleteListener.onPasswordTooMin(sPoints.size());
error();
clearPassword();
Toast.makeText(this.getContext(), "手势密码少于4个点", Toast.LENGTH_SHORT).show();
} else if (mCompleteListener != null) {
this.disableTouch();
mCompleteListener.onComplete(toPointString());
}
}
this.postInvalidate();
return true;
}
/**
*
*/
private void error() {
for (Point p : sPoints) {
p.state = Point.STATE_CHECK_ERROR;
}
}
public void markError() {
markError(CLEAR_TIME);
}
public void markError(final long time) {
for (Point p : sPoints) {
p.state = Point.STATE_CHECK_ERROR;
}
this.clearPassword(time);
}
public void enableTouch() {
isTouch = true;
}
public void disableTouch() {
isTouch = false;
}
private Timer timer = new Timer();
private TimerTask task = null;
public void clearPassword() {
clearPassword(CLEAR_TIME);
}
public void clearPassword(final long time) {
if (time > 1) {
if (task != null) {
task.cancel();
Log.d("task", "clearPassword cancel()");
}
postInvalidate();
task = new TimerTask() {
public void run() {
reset();
postInvalidate();
}
};
Log.d("task", "clearPassword schedule(" + time + ")");
timer.schedule(task, time);
} else {
reset();
postInvalidate();
}
}
//
private OnCompleteListener mCompleteListener;
/**
* @param mCompleteListener
*/
public void setOnCompleteListener(OnCompleteListener mCompleteListener) {
this.mCompleteListener = mCompleteListener;
}
public interface OnCompleteListener {
public void onComplete(String password);
}
}看完上述内容，你们对使用android怎么实现九宫格手势密码有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注亿速云行业资讯频道，感谢大家的支持。
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