investigate OutOfMemoryError in clusters of datapoints map

[valllllll2000]

https://sentry.io/akvo-foundation/flow-android/issues/264174508/

RuntimeException: An error occured while executing doInBackground()
    at android.os.AsyncTask$3.done(AsyncTask.java:299)
    at java.util.concurrent.FutureTask$Sync.innerSetException(FutureTask.java:273)
    at java.util.concurrent.FutureTask.setException(FutureTask.java:124)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:307)
    at java.util.concurrent.FutureTask.run(FutureTask.java:137)
...
(3 additional frame(s) were not displayed)

OutOfMemoryError: None
    at com.google.maps.android.clustering.algo.NonHierarchicalDistanceBasedAlgorithm.getClusters(NonHierarchicalDistanceBasedAlgorithm.java:136)
    at com.google.maps.android.clustering.algo.PreCachingAlgorithmDecorator.getClustersInternal(PreCachingAlgorithmDecorator.java:98)
    at com.google.maps.android.clustering.algo.PreCachingAlgorithmDecorator.getClusters(PreCachingAlgorithmDecorator.java:72)
    at com.google.maps.android.clustering.ClusterManager$ClusterTask.doInBackground(ClusterManager.java:213)
    at com.google.maps.android.clustering.ClusterManager$ClusterTask.doInBackground(ClusterManager.java:208)
...
(9 additional frame(s) were not displayed)

An error occured while executing doInBackground()

[valllllll2000]

Ran analysis on both new and refactored code on my nexus 6 (quite powerful device)

• with 300 datapoints -> clusters work well and map displays datapoints correctly
• with 30 000 datapoints -> map displays datapoints but the app becomes slow as it seems obviously there is heavy processing going on there. App still usable, does not seem to be any memory leaks as memory goes up and then down after each device rotation.
• with 300 000 -> app becomes unusable and unresponsive, too much processing going on.

Also ran analisis on sony experia, a very old entry level device. Even with 300 datapoints after rotating the device multiple times, the app crashes:

05-23 13:23:58.654 3596-4635/org.akvo.flow E/AndroidRuntime: FATAL EXCEPTION: GLThread 867
                                                             java.lang.OutOfMemoryError: bitmap size exceeds VM budget
                                                                 at android.graphics.Bitmap.nativeCreate(Native Method)
                                                                 at android.graphics.Bitmap.createBitmap(Bitmap.java:477)
                                                                 at maps.Y.i.a(Unknown Source)
                                                                 at maps.Y.l.a(Unknown Source)
                                                                 at maps.Y.l.a(Unknown Source)
                                                                 at maps.Y.l.b(Unknown Source)
                                                                 at maps.aa.o.a(Unknown Source)
                                                                 at maps.aa.t.a(Unknown Source)
                                                                 at maps.V.K.a(Unknown Source)
                                                                 at maps.V.H.a(Unknown Source)
                                                                 at maps.V.H.b(Unknown Source)
                                                                 at maps.V.x$g.g(Unknown Source)
                                                                 at maps.V.x$g.run(Unknown Source)
05-23 13:24:00.365 3596-3708/org.akvo.flow E/dalvikvm-heap: Out of memory on a 226844-byte allocation.

[stale[bot]]

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