问题
I'm displaying an image on full screen now i want to zoom it in or out. Any one guide on how I can implement multi touch image zooming?
I am using the 2.1 sdk version.
回答1:
There is the possibility to use a webview to display a local file. The Webview has integrated multitouch zooming. Have a look at my question regarding this topic.
回答2:
I have a working implementation for 2.1+
WebView solution caused problems for me on 4.0.x (lot's of weird white spaces appearing)
https://github.com/jasonpolites/gesture-imageview
Might be useful for someone...
回答3:
A recent post on the Android Developers Blog includes an example that does exactly what you ask. Unfortunately, it relies upon ScaleGestureDetecter which makes its first appearance in Froyo.
回答4:
Have you tried using the intent "android.intent.action.VIEW" and letting the phone's built in image viewer display your image? It will probably use multi-touch controls if the phone supports it.
http://developer.android.com/reference/android/content/Intent.html#ACTION_VIEW
回答5:
Regarding gesture-imageview lib: https://github.com/jasonpolites/gesture-imageview
it's in fact useful, but unfortunatelly it has some bugs, like: https://github.com/jasonpolites/gesture-imageview/issues/37
Anyway, good lib to try. It solved my usecase.
来源：https://stackoverflow.com/questions/3055133/android-multitouch-image-zooming