我有画布绘图应用程序。我成功地完成了填充填充算法，用于通过手指绘制形状填充手指绘制圆和矩形区域的颜色。我的问题是在用手指填充创建的形状的颜色后，在画布上画线时填充的颜色消失了。
public class DrawingView extends View {
private final Paint mDefaultPaint;
private final Paint mFloodPaint = new Paint();
Bitmap mBitmap;
float x, y;
ProgressDialog pd;
LinearLayout drawing_layout;
private Canvas mLayerCanvas = new Canvas();
private Bitmap mLayerBitmap;
final Point p1 = new Point();
private Stack<DrawOp> mDrawOps = new Stack<>();
private Stack<DrawOp> mUndoOps = new Stack<>();
boolean isFill;/* = false;*/
private SparseArray<DrawOp> mCurrentOps = new SparseArray<>(0);
public DrawingView(Context context) {
this(context, null, 0);
}
public DrawingView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public DrawingView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
mDefaultPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mDefaultPaint.setStyle(Paint.Style.STROKE);
mDefaultPaint.setStrokeJoin(Paint.Join.ROUND);
mDefaultPaint.setStrokeCap(Paint.Cap.ROUND);
mDefaultPaint.setStrokeWidth(40);
mDefaultPaint.setColor(Color.GREEN);
/*mFloodPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
mFloodPaint.setStyle(Paint.Style.STROKE);
mFloodPaint.setStrokeJoin(Paint.Join.ROUND);
mFloodPaint.setStrokeCap(Paint.Cap.ROUND);
mFloodPaint.setStrokeWidth(40);
mFloodPaint.setColor(Color.GREEN);*/
setFocusable(true);
setFocusableInTouchMode(true);
setBackgroundColor(Color.WHITE);
setLayerType(LAYER_TYPE_SOFTWARE, null);
setSaveEnabled(true);
}
@Override
public boolean onTouchEvent(@NonNull MotionEvent event) {
final int pointerCount = MotionEventCompat.getPointerCount(event);
switch (MotionEventCompat.getActionMasked(event)) {
case MotionEvent.ACTION_DOWN: {
if (isFill == true) {
int xx = (int) event.getX();
int yy = (int) event.getY();
Point pp = new Point(xx, yy);
/*Point pp = new Point();
pp.x = (int) event.getX();
pp.y = (int) event.getY();*/
final int sourceColor = mLayerBitmap.getPixel(xx, yy);
final int targetColor = mDefaultPaint.getColor();
// final int targetColor = mFloodPaint.getColor();
new TheTask(mLayerBitmap, pp, sourceColor, targetColor)
.execute();
// JniBitmap.floodFill(mLayerBitmap, xx, yy, sourceColor,targetColor);
/* FloodFill f = new FloodFill();
f.floodFill(mLayerBitmap, pp, sourceColor, targetColor);*/
}
else if(isFill == false){
for (int p = 0; p < pointerCount; p++) {
final int id = MotionEventCompat.getPointerId(event, p);
DrawOp current = new DrawOp(mDefaultPaint);
current.getPath().moveTo(event.getX(), event.getY());
mCurrentOps.put(id, current);
}
}
}
break;
case MotionEvent.ACTION_MOVE: {
if (isFill == false) {
final int id = MotionEventCompat.getPointerId(event, 0);
DrawOp current = mCurrentOps.get(id);
final int historySize = event.getHistorySize();
for (int h = 0; h < historySize; h++) {
x = event.getHistoricalX(h);
y = event.getHistoricalY(h);
current.getPath().lineTo(x, y);
}
x = MotionEventCompat.getX(event, 0);
y = MotionEventCompat.getY(event, 0);
current.getPath().lineTo(x, y);
}
}
break;
case MotionEvent.ACTION_UP: {
if(isFill == false){
// mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
for (int p = 0; p < pointerCount; p++) {
final int id = MotionEventCompat.getPointerId(event, p);
mDrawOps.push(mCurrentOps.get(id));
mCurrentOps.remove(id);
}
updateLayer();
}
}
/* else{
for (int p = 0; p < pointerCount; p++) {
final int id = MotionEventCompat.getPointerId(event, p);
mDrawOps.push(mCurrentOps.get(id));
mCurrentOps.remove(id);
}
}*/
// }
break;
case MotionEvent.ACTION_CANCEL: {
if(isFill == false){
for (int p = 0; p < pointerCount; p++) {
mCurrentOps.remove(MotionEventCompat.getPointerId(event, p));
}
updateLayer();
}
}
break;
default:
return false;
}
invalidate();
return true;
}
class TheTask extends AsyncTask<Void, Integer, Void> {
Bitmap bmp;
Point pt;
int replacementColor, targetColor;
public TheTask(Bitmap bm, Point p, int sc, int tc) {
// this.bmp = bm;
mLayerBitmap = bm;
pd = new ProgressDialog(getContext());
this.pt = p;
this.replacementColor = tc;
this.targetColor = sc;
pd.setMessage("Filling....");
pd.show();
}
@Override
protected void onPreExecute() {
}
@Override
protected void onProgressUpdate(Integer... values) {
}
@Override
protected Void doInBackground(Void... params) {
FloodFill f = new FloodFill();
// mLayerBitmap = f.floodFill(bmp, pt, targetColor, replacementColor);
f.floodFill(mLayerBitmap, pt, targetColor, replacementColor);
// New Commented Algorithm
// f.FloodFill(mLayerBitmap, pt, targetColor, replacementColor);
return null;
}
@Override
protected void onPostExecute(Void result) {
pd.dismiss();
invalidate();
isFill = false;
}
}
public void fillShapeColor(Bitmap mBitmap2) {
isFill = true;
}
/*public void fillShapeColor() {
isFill = true;
}*/
public void setDrawing() {
isFill = false;
}
@Override
protected void onSizeChanged(int w, int h, int oldW, int oldH) {
super.onSizeChanged(w, h, oldW, oldH);
mLayerBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
mLayerCanvas.setBitmap(mLayerBitmap);
updateLayer();
}
/* private void updateDLayer(){
mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
for (DrawOp drawOp : mDrawOps) {
if (drawOp != null) {
// drawOp.draw(new Canvas(mLayerBitmap));
drawOp.draw(mLayerCanvas);
}
}
invalidate();
}*/
private void updateLayer() {
/* isFill=false;
if(isFill==false){
mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
}
else{
System.out.println("Not using mLayerCanvas.drawColor()");
}*/
// mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
// this.getPaintStrokeWidth();
// this.getPaintMaskFilter();
/* if(isFill == false){
// this.getPaintOpacity();
mLayerCanvas.save();
// mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
mLayerCanvas.restore();
}*/
/*mDefaultPaint.setXfermode(new PorterDuffXfermode(Mode.CLEAR));
mLayerCanvas.drawPaint(mDefaultPaint);
mDefaultPaint.setXfermode(new PorterDuffXfermode(Mode.SRC));
mLayerCanvas.drawPaint(mDefaultPaint);*/
/* if(isFill==false){
mLayerCanvas.save();
mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
mLayerCanvas.restore();
invalidate();
}
else{
mLayerCanvas.save();
for (DrawOp drawOp : mDrawOps) {
if (drawOp != null) {
// drawOp.draw(new Canvas(mLayerBitmap));
drawOp.draw(mLayerCanvas);
}
}
mLayerCanvas.restore();
}*/
/*DrawOp dr = new DrawOp(mDefaultPaint);
if(dr.getPath().isEmpty()){
// isFill = true;
isFill = false;
}
else{
isFill=true;
mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
}*/
if(isFill == false){
mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
}
for (DrawOp drawOp : mDrawOps) {
if (drawOp != null) {
// drawOp.draw(new Canvas(mLayerBitmap));
drawOp.draw(mLayerCanvas);
}
}
invalidate();
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (isInEditMode()) {
return;
}
/*int w = canvas.getWidth();
int h = canvas.getHeight();
canvas.drawRect(0,0,w,h, mDefaultPaint);*/
canvas.drawBitmap(mLayerBitmap, 0, 0, null);
for (int i = 0; i < mCurrentOps.size(); i++) {
DrawOp current = mCurrentOps.valueAt(i);
if (current != null) {
current.draw(canvas);
}
}
}
public void operationClear() {
mDrawOps.clear();
mUndoOps.clear();
mCurrentOps.clear();
// To Clear Whole Canvas
mLayerCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
updateLayer();
}
public void operationUndo() {
if (mDrawOps.size() > 0) {
mUndoOps.push(mDrawOps.pop());
updateLayer();
}
}
public void operationRedo() {
if (mUndoOps.size() > 0) {
mDrawOps.push(mUndoOps.pop());
updateLayer();
}
}
public void setPaintStrokeWidth(float widthPx) {
mDefaultPaint.setStrokeWidth(widthPx);
// mFloodPaint.setStrokeWidth(widthPx);
}
/*public float getPaintStrokeWidth(){
return mDefaultPaint.getStrokeWidth();
}*/
public void setPaintOpacity(int percent) {
int alphaValue = (int) Math.round(percent * (255.0 / 100.0));
mDefaultPaint.setColor(combineAlpha(mDefaultPaint.getColor(),
alphaValue));
// mFloodPaint.setColor(combineAlpha(mFloodPaint.getColor(),
// alphaValue));
}
/*public int getPaintOpacity(){
this.setPaintOpacity(50);
return mDefaultPaint.getColor();
}*/
public void setPaintColor(String color) {
mDefaultPaint.setXfermode(null);
mDefaultPaint.setColor(combineAlpha(Color.parseColor(color),
mDefaultPaint.getAlpha()));
// mDefaultPaint.setColor(mDefaultPaint.getAlpha());
mFloodPaint.setXfermode(null);
mFloodPaint.setColor(combineAlpha(Color.parseColor(color),
mFloodPaint.getAlpha()));
}
public void setPaintColor(int color) {
mDefaultPaint.setXfermode(null);
mDefaultPaint.setColor(combineAlpha(color, mDefaultPaint.getAlpha()));
mFloodPaint.setXfermode(null);
mFloodPaint.setColor(combineAlpha(color, mFloodPaint.getAlpha()));
}
// New Created
public void setEraser(int color){
// mDefaultPaint.setAlpha(0xFF);
mDefaultPaint.setColor(color);
mDefaultPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
}
public void setPaintMaskFilter(MaskFilter filter) {
mDefaultPaint.setMaskFilter(filter);
// mFloodPaint.setMaskFilter(filter);
}
/*public MaskFilter getPaintMaskFilter(){
return mDefaultPaint.getMaskFilter();
}*/
public void setPaintShader(BitmapShader shader) {
mDefaultPaint.setShader(shader);
// mFloodPaint.setShader(shader);
}
public void setPaintColorFilter(ColorFilter colorFilter) {
mDefaultPaint.setColorFilter(colorFilter);
// mFloodPaint.setColorFilter(colorFilter);
}
private static int combineAlpha(int color, int alpha) {
return (color & 0x00FFFFFF) | ((alpha & 0xFF) << 24);
}
private static class DrawOp {
private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
private final Path mPath = new Path();
public DrawOp(Paint paint) {
reset(paint);
}
void reset(Paint paint) {
mPath.reset();
update(paint);
}
void update(Paint paint) {
mPaint.set(paint);
}
void draw(Canvas canvas) {
canvas.drawPath(mPath, mPaint);
}
public Path getPath() {
return mPath;
}
}
public void setFillColor(boolean flag){
this.isFill = flag;
}
}
答案 0 :(得分：1)
更新你的updateLayer（）方法，如下所示：
private void updateLayer() {
/*if(isFill == false){
mCanvas.drawColor(0, PorterDuff.Mode.CLEAR);
}*/
for (DrawOp drawOp : mDrawOps) {
if (drawOp != null) {
drawOp.draw(mCanvas);
}
}
invalidate();
}