Get Intent to start {@link PhotoPickerActivity} @return Intent for {@link PhotoPickerActivity}

If the normalizedScale is equal to 1, then the image is made to fit the screen. Otherwise, it is made to fit the screen according to the dimensions of

Save the current matrix and view dimensions in the prevMatrix and prevView variables.

Send the Intent from an Activity with a custom request code @param activity Activity to receive result @param requestCode requestCode for result

Performs boundary checking and fixes the image matrix if it is out of bounds.

This function will transform the coordinates in the touch event to the coordinate system of the drawable that the imageview contain @param x x-coordi

Get Intent to start {@link PhotoPickerActivity} @return Intent for {@link PhotoPickerActivity}

Set zoom to the specified scale. Image will be centered by default.

When transitioning from zooming from focus to zoom from center (or vice versa) the image can become unaligned within the view. This is apparent when z

Indicates if the item at position position is selected @param photo Photo of the item to check @return true if the item is selected, false otherwise

Set view dimensions based on layout params

Inverse of transformCoordTouchToBitmap. This function will transform the coordinates in the drawable's coordinate system to the view's coordinate syst

After rotating, the matrix needs to be translated. This function finds the area of image which was previously centered and adjusts translations so tha

Interpolate the current targeted zoom and get the delta from the current zoom.

Get the current zoom. This is the zoom relative to the initial scale, not the original resource. @return current zoom multiplier.

Return the point at the center of the zoomed image. The PointF coordinates range in value between 0 and 1 and the focus point is denoted as a fraction

Count the selected items @return Selected items count

Use interpolator to get t

Returns false if image is in initial, unzoomed state. False, otherwise. @return true if image is zoomed

Overriding this method allows us to run our exit animation first, then exiting the activity when it complete.

@param position 所选图片的位置 @param path 所选的图片 @param selectedItemCount 已选数量 @return enable check