mvestola / helsinki-testbed2-android Goto Github PK

One user has requested pinch zooming functionality to the map image.

Below are some links about implementing pinch zooming to ImageView:

• http://stackoverflow.com/questions/5375817/android-pinch-zoom
• https://github.com/MikeOrtiz/TouchImageView
• https://github.com/jasonpolites/gesture-imageview

Implementing pinch zooming seems to be a quite hard task. It would be useful to zoom out the map, however, zooming more in is not so useful because the map image is a raster image which has not so good resolution.

We are working on a project called PersisDroid (http://www.cudroid.com/PersisDroid/) for detecting potential performance issues. Our tool could find performance degradation caused by improper usage of asynchronous executions.
We find that in some cases your app may suffer a long processing delay.

Case:
Related source code Class: DownloadImagesTask Method: downloadImages
Circumstance Sometimes it is slow to download images.
Problem Do not interrupt the bitmap that is currently downloading. When the network is poor, the later downloading tasks should wait for the previous downloads.
Suggested modification Interrupt the downloading of bitmap when not necessary. Consider downloading multiple bitmaps in parallel.

Changing the map type now takes 7 steps:

1. Open context menu
2. Select settings
3. Select map type setting
4. Choose map type
5. Push back
6. Open context menu
7. Select refresh

More user friendly would be to, for example, have an icon at the top right of the map view where user could change the map type and reload the view with two steps:

1. Select the map type icon on the top right corner
2. Choose the desired map type (from a popup list or something) --> The view is then automatically reloaded