一张页面，包含多个可书写Surfaceview的情况下，如何单独保存绘制path到bitmap的问题 about onyxandroiddemo HOT 4 CLOSED

private static final String TAG = ScribbleMultipleScribbleViewActivity.class.getSimpleName();

@Bind(R.id.button_pen)
Button buttonPen;
@Bind(R.id.button_eraser)
Button buttonEraser;
@Bind(R.id.content)
View content;
@Bind(R.id.surfaceview1)
SurfaceView surfaceView1;
@Bind(R.id.surfaceview2)
SurfaceView surfaceView2;

private TouchHelper touchHelper;

private RawInputCallback rawInputCallback;
private List<Rect> limitRectList = new ArrayList<>();

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_scribble_multiple_scrubble_view_demo);

    ButterKnife.bind(this);
    touchHelper = TouchHelper.create(getWindow().getDecorView().getRootView(), getRawInputCallback());
    initSurfaceView(surfaceView1);
    initSurfaceView(surfaceView2);
}

@Override
protected void onResume() {
    touchHelper.setRawDrawingEnabled(true);
    super.onResume();
}

@Override
protected void onPause() {
    touchHelper.setRawDrawingEnabled(false);
    super.onPause();
}

@Override
protected void onDestroy() {
    touchHelper.closeRawDrawing();
    super.onDestroy();
}

private void initSurfaceView(final SurfaceView surfaceView) {
    final SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            cleanSurfaceView(surfaceView);
            Rect limit = new Rect();
            surfaceView.getGlobalVisibleRect(limit);
            limitRectList.add(limit);
            onSurfaceCreated(limitRectList);
        }

        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
        }

        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            holder.removeCallback(this);
        }
    };
    surfaceView.getHolder().addCallback(surfaceCallback);
}

private void onSurfaceCreated(List<Rect> limitRectList) {
    if (limitRectList.size() < 2) {
        return;
    }
    touchHelper.setLimitRect(limitRectList, new ArrayList<Rect>())
            .openRawDrawing();
}

public RawInputCallback getRawInputCallback() {
    if (rawInputCallback == null) {
        rawInputCallback = new RawInputCallback() {
            @Override
            public void onBeginRawDrawing(boolean b, TouchPoint touchPoint) {

            }

            @Override
            public void onEndRawDrawing(boolean b, TouchPoint touchPoint) {

            }

            @Override
            public void onRawDrawingTouchPointMoveReceived(TouchPoint touchPoint) {

            }

            @Override
            public void onRawDrawingTouchPointListReceived(TouchPointList touchPointList) {
                drawScribbleToBitmap(touchPointList.getPoints());
            }

            @Override
            public void onBeginRawErasing(boolean b, TouchPoint touchPoint) {
            }

            @Override
            public void onEndRawErasing(boolean b, TouchPoint touchPoint) {
            }

            @Override
            public void onRawErasingTouchPointMoveReceived(TouchPoint touchPoint) {
            }

            @Override
            public void onRawErasingTouchPointListReceived(TouchPointList touchPointList) {
            }
        };
    }
    return rawInputCallback;
}


@OnClick(R.id.button_pen)
public void onPenClick(){
    touchHelper.setRawDrawingEnabled(true);
}

@OnClick(R.id.button_eraser)
public void onEraserClick(){
    touchHelper.setRawDrawingEnabled(false);
    cleanAllSurfaceView();
    touchHelper.setRawDrawingEnabled(true);
}

@OnClick(R.id.button_single_region_mode)
public void onSingleRegionModeClick() {
    touchHelper.setRawDrawingEnabled(false);
    cleanAllSurfaceView();
    touchHelper.setSingleRegionMode();
    touchHelper.setRawDrawingEnabled(true);
}

@OnClick(R.id.button_multi_region_mode)
public void onMultiRegionModeClick() {
    touchHelper.setRawDrawingEnabled(false);
    cleanAllSurfaceView();
    touchHelper.setMultiRegionMode();
    touchHelper.setRawDrawingEnabled(true);
}

private void cleanAllSurfaceView() {
    cleanSurfaceView(surfaceView1);
    cleanSurfaceView(surfaceView2);
}

private void cleanSurfaceView(SurfaceView surfaceView) {
    if (surfaceView.getHolder() == null) {
        return;
    }
    Canvas canvas = surfaceView.getHolder().lockCanvas();
    if (canvas == null) {
        return;
    }
    canvas.drawColor(Color.WHITE);
    surfaceView.getHolder().unlockCanvasAndPost(canvas);
}

Bitmap resultBitmap;
Canvas canvas;
private void drawScribbleToBitmap(List<TouchPoint> list) {
    SurfaceView surfaceView = surfaceView1;
    if (resultBitmap == null) {
        resultBitmap = Bitmap.createBitmap(surfaceView.getWidth(), surfaceView.getHeight(), Bitmap.Config.ARGB_8888);
        canvas = new Canvas(resultBitmap);
    } else {
        resultBitmap = Bitmap.createBitmap(resultBitmap);
        canvas.setBitmap(resultBitmap);
    }

    Path path = new Path();
    PointF prePoint = new PointF(list.get(0).x, list.get(0).y);
    path.moveTo(prePoint.x, prePoint.y);
    for (TouchPoint point : list) {
        System.out.println(point.x + "===================" + point.y);
        path.quadTo(prePoint.x, prePoint.y, point.x, point.y);
        prePoint.x = point.x;
        prePoint.y = point.y;
    }
    Paint paint = new Paint();
    paint.setAntiAlias(true);
    paint.setStyle(Paint.Style.STROKE);
    paint.setColor(Color.BLACK);
    paint.setStrokeWidth(3.0f);

    canvas.drawPath(path, paint);
    BitmapUtils.saveBitmap(resultBitmap, "/sdcard/Android/data/com.onyx.android.demo/test.png");
}