pinchzoom

问题 I want to know if there is a way to detect user is doing pinch zoom. I want to do two things when user zooming in: let the div align the left side of screen set the width of div equal to the viewport width I found Android has touchstart , touchend and touchmove , but they won't be triggered during multitouch. I want to complete above function right after finishing zooming. Are there any other approaches? I am not doing the web app. I am just adding some functions to the mobile version. 回答1:

问题 The application's interface consists of the following items. An image switcher that fills the entire screen. A next button. A previous button. How can I use the pinch zooming in the image Switcher ? 回答1: Implementing the Pinch Zoom Gesture The pinch zoom gesture is similar to the drag gesture, except it starts when the second finger is pressed to the screen ( ACTION_POINTER_DOWN ). case MotionEvent.ACTION_POINTER_DOWN: oldDist = spacing(event); Log.d(TAG, "oldDist=" + oldDist); if (oldDist >

问题 I need to drag and zoom an image. Here is my code ... //instance variables Matrix matrix = new Matrix(); Matrix savedMatrix = new Matrix(); static final int NONE = 0; static final int DRAG = 1; static final int ZOOM = 2; int mode = NONE; PointF start = new PointF(); PointF mid = new PointF(); float oldDist = 1f; //OnTouchListener for imageview OnTouchListener touchAction = new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { ImageView i = (ImageView)v;

问题 I'm implementing a zoomable View from examples I've found on Stack and other websites. I do want to add a drawing feature to the view. I'm able to get the paths to show up but the scaling is way off from the image behind it. I used an example android image where I traced along the shape and the paths appeared to the left and above it. Also, zooming causes it to shift (pictures below). I've been playing around with the onDraw method where the canvas is drawn but with little success. I

问题 I am working on a simple book reader app for Android. I have used the listview for this. What I am doing is loading the remote images from server into my Listview (Using the picasso library) and is working fine. I also wanted to zoom functionality in my Reader, well I used ZoomListView class to achieve this. public class ZoomListView extends ListView { private static final int INVALID_POINTER_ID = -1; private int mActivePointerId = INVALID_POINTER_ID; private ScaleGestureDetector

问题 I was getting the url as a string and i am appending it to images properly and they were able to display. Now I need to Pinch zoom that image by any way i.e. double click, pinch zoom and taking it to another activity.... I found links but they are local drawables but i need for urls 回答1: Try following links. May this help you https://github.com/MikeOrtiz/TouchImageView http://blahti.wordpress.com/2013/01/07/pan-zoom-examples-for-android/ http://www.wglxy.com/android-tutorials/android-touch

问题 How to make zoomable LinearLayout? I used this to zoom my layout this worked for click to zoom and not for pinch to zoom and also i want to zoom a view over this layout. That view is returned by canvas method that is used to draw a line over this layout. Now my layout is zooming and not the canvas element. Can someone help me to zoom both the canvas element and the layout. Thanks in advance buddy. 回答1: This Answer is to zoom image and content made to load in webview Copy an Image in Assets

问题 I'm developing an App which has (image saving) in one of the views, I have three different sizes which I want my images to be saved in after the user zoom and scale the image which is captured from the scroll view when the user click on save. Below is my Codes: After the style is selected the width and height is set depending on type chosen and then the scrollview creating method called -(void)viewDidAppear:(BOOL)animated{ if(!([getColor length] == 0)) { [theColored setHidden:NO]; [imageView

问题 'm developing an application in which I'm pasting images, doing drawing and painting on canvas. This app can also Scale up/down the canvas or drag it to different location. My problem is: I can't get the correct canvas coordinates after scaling or dragging the canvas. I want to draw finger paint after the canvas is scaled or dragged but unable to retrieve the right place where i've touched... @Override public boolean onTouchEvent(MotionEvent event) { scaleListener.onTouchEvent(event);

问题 i had used ScaleGestureDetector. I used this code but it doesnt work in fragment and also it doesnt shows any error Please anyone can help me with this thanx in advance but when i use the same code in activity it works perfectly public class Fragment2 extends Fragment { ImageView imgZoom; Matrix matrix = new Matrix(); float scale = 1f; ScaleGestureDetector SGD; // Keep all Images in array Integer[] mThumbIds = { R.drawable. car1, R.drawable.car2, R.drawable.car3, R.drawable.car4, R.drawable