NoSuchMethodError: floorEntry on Froyo

[hank]

=== application info ===

Version: 1.093 (10013)
Package: de.schildbach.wallet.litecoin
Databases:

Contents of FilesDir /data/data/de.schildbach.wallet.litecoin/files:
2013-08-28 23:49:46 0 files

• 2013-08-28 23:49:46 109 wallet-protobuf
• 2013-08-28 23:50:41 156 key-backup-base58.46
• 2013-08-28 23:50:41 156 key-backup-base58

Contents of CacheDir /data/data/de.schildbach.wallet.litecoin/cache:
2013-08-28 23:50:41 0 cache

=== stack trace ===

java.lang.NoSuchMethodError: java.util.TreeMap.floorEntry
at com.google.litecoin.core.CheckpointManager.getCheckpointBefore(CheckpointManager.java:109)
at com.google.litecoin.core.CheckpointManager.checkpoint(CheckpointManager.java:143)
at de.schildbach.wallet.litecoin.service.BlockchainServiceImpl.onCreate(BlockchainServiceImpl.java:594)
at android.app.ActivityThread.handleCreateService(ActivityThread.java:2959)
at android.app.ActivityThread.access$3300(ActivityThread.java:125)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2087)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:858)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
at dalvik.system.NativeStart.main(Native Method)

=== device info ===

Date: Wed Aug 28 23:50:48 GMT-03:00 2013
Phone Model: GT-I5500L
Android Version: 2.2.2
Board: GT-I5500L
Brand: samsung
Device: GT-I5500L
Display: FROYO.UYJPP
Finger Print: samsung/GT-I5500L/GT-I5500L/GT-I5500L:2.2.2/FROYO/UYJPP:user/release-keys
Host: SEP-69
ID: FROYO
Model: GT-I5500L
Product: GT-I5500L
Tags: release-keys
Time: 1316745555000
Type: user
User: se.infra
Configuration: { scale=1.0 imsi=722/7 loc=es_US touch=3 keys=1/1/2 nav=2/1 orien=2 layout=17 uiMode=17 seq=44 FlipFont=0}
Screen Layout: size 1 long 16
Display Metrics: DisplayMetrics{density=0.75, width=320, height=240, scaledDensity=0.75, xdpi=145.14285, ydpi=142.5965}
Memory Class: 24

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