Android 更改绘制颜色时,现有笔划也会更改
我正在使用下面的代码捕获图形。要更改笔划颜色或宽度,我调用Android 更改绘制颜色时,现有笔划也会更改,android,colors,paint,Android,Colors,Paint,我正在使用下面的代码捕获图形。要更改笔划颜色或宽度,我调用setPaintAttribute()方法。但当我改变颜色时,整个图形都会改变,包括我以前画的线条。我怎样才能改变油漆的颜色,保持以前的图纸不变?我试图创建一个新路径,但是上一个图形消失了 public void setPaintAttributes(float STROKE_WIDTH, int color) { paint=new Paint(); paint.setAntiAlias(true
setPaintAttribute()
方法。但当我改变颜色时,整个图形都会改变,包括我以前画的线条。我怎样才能改变油漆的颜色,保持以前的图纸不变?我试图创建一个新路径,但是上一个图形消失了
public void setPaintAttributes(float STROKE_WIDTH, int color)
{
paint=new Paint();
paint.setAntiAlias(true);
paint.setColor(color);
paint.setStyle(Paint.Style.STROKE);
paint.setStrokeJoin(Paint.Join.ROUND);
paint.setStrokeWidth(STROKE_WIDTH);
}
public boolean onTouchEvent(MotionEvent event) {
scrollView.requestDisallowInterceptTouchEvent(true);
btnSaveSignature.setEnabled(true);
btnSaveSignature.setBackgroundResource(R.drawable.save);
float eventX = event.getX();
float eventY = event.getY();
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
path.moveTo(eventX, eventY);
lastTouchX = eventX;
lastTouchY = eventY;
return true;
case MotionEvent.ACTION_MOVE:
case MotionEvent.ACTION_UP:
resetDirtyRect(eventX, eventY);
int historySize = event.getHistorySize();
for (int i = 0; i < historySize; i++) {
float historicalX = event.getHistoricalX(i);
float historicalY = event.getHistoricalY(i);
path.lineTo(historicalX, historicalY);
}
path.lineTo(eventX, eventY);
break;
}
invalidate((int) (dirtyRect.left - HALF_STROKE_WIDTH),
(int) (dirtyRect.top - HALF_STROKE_WIDTH),
(int) (dirtyRect.right + HALF_STROKE_WIDTH),
(int) (dirtyRect.bottom + HALF_STROKE_WIDTH));
lastTouchX = eventX;
lastTouchY = eventY;
return true;
}
private void resetDirtyRect(float eventX, float eventY) {
dirtyRect.left = Math.min(lastTouchX, eventX);
dirtyRect.right = Math.max(lastTouchX, eventX);
dirtyRect.top = Math.min(lastTouchY, eventY);
dirtyRect.bottom = Math.max(lastTouchY, eventY);
}
public void setPaintAttributes(浮动笔划宽度,int-color)
{
油漆=新油漆();
paint.setAntiAlias(真);
油漆。设置颜色(颜色);
绘制.设置样式(绘制.样式.笔划);
绘制.设置行程连接(绘制.连接.圆形);
油漆。设置行程宽度(行程宽度);
}
公共布尔onTouchEvent(运动事件){
scrollView.RequestDisallowWinterCeptTouchEvent(true);
btnsavesignation.setEnabled(true);
btnSaveSignature.setBackgroundResource(R.drawable.save);
float eventX=event.getX();
float eventY=event.getY();
开关(event.getAction()){
case MotionEvent.ACTION\u DOWN:
path.moveTo(eventX,eventY);
lastTouchX=eventX;
lastTouchY=eventY;
返回true;
case MotionEvent.ACTION\u移动:
case MotionEvent.ACTION\u UP:
resetDirtyRect(eventX,eventY);
int historySize=event.getHistorySize();
for(int i=0;i
创建一个包含path和paint对的arraylist,然后将每个路径添加到arraylist,它对我有效
ArrayList<Pair<Path, Paint>> paths = new ArrayList<Pair<Path, Paint>>();
ArrayList路径=新建ArrayList();
使用方法如下:
mCanvas = new Canvas();
mPath = new Path();
Paint newPaint = new Paint(mPaint);
paths.add(new Pair<Path, Paint>(mPath, newPaint));
mCanvas=newcanvas();
mPath=新路径();
油漆新油漆=新油漆(mPaint);
添加(新对(mPath,newPaint));
大家好,有人找到解决方案了吗。?我正在努力解决这个问题。请帮帮我。这方面有什么更新吗?触摸屏幕时,触摸只识别,没有画点。这是android签名捕获中的一个问题吗?