尝试保存照片视图缩放状态（方向更改或应用操作时）

Question

其实试图挽救 ） 图片浏览的放大状态，无所适从到getDisplayMatrix通（以及如何获得getDisplayMatrix GOT（不能应用于getDisplayMatrix（矩阵）在PhotoView中），这里面同时的getDisplayMatrix参数图片浏览 ，这是代码`

 mPhotoView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
            public boolean onPreDraw() {

                mPhotoView.getViewTreeObserver().removeOnPreDrawListener(this);
                mViewHeight = mPhotoView.getMeasuredHeight();
                mViewWidth = mPhotoView.getMeasuredWidth();

                Matrix matrix = new Matrix();
                **Matrix theMatrix = mPhotoView.getDisplayMatrix();**

//                Matrix theMatrix = mPhotoView.getDisplayMatrix();
                theMatrix.getValues(mBaseMatrixValues);
                float mScreenBase = mBaseMatrixValues[0];
                int theWidth = mPhotoView.getWidth();

                if (savedInstanceState != null) {
                    float[] theFloats = new float[9];
                    float theZoom = savedInstanceState.getFloat("ZoomLevel");
                    RectF theRect = savedInstanceState.getParcelable("RectF");
                    theFloats[0] = theZoom;
                    theFloats[4] = theZoom;
                    theFloats[2] = (theRect.left * mScreenBase) - (theZoom * mBaseMatrixValues[2]) + (mViewWidth / 2); //Left
                    theFloats[5] = (theRect.top * mScreenBase) - (theZoom * mBaseMatrixValues[5]) + (mViewHeight / 2); //Top
                    theFloats[8] = (float) 1.0;

                    theFloats = CheckBoundaries(theZoom, theFloats, theRect);

                    theMatrix.setValues(theFloats);
                    mPhotoView.setDisplayMatrix(theMatrix); //Sets the mSuppMatrix in the PhotoViewAttacher

                    Matrix theImageViewMatrix = mPhotoView.getImageMatrix(); //Gets the new mDrawMatrix
                    mPhotoView.setImageMatrix(theImageViewMatrix); //And applies it to the PhotoView (catches out of boundaries problems)
                }
                return true;
            }
        });
    }`

我遵循此示例Android PhotoView更改方向后保持缩放

请提前帮助谢谢