The Java source code of the Pinyin input method which can be used on the Android2.2 and 2.3, and it is released by Google. Based on it, you can re-compile your own input method.

com\android\inputmethod\latin\Dictionary.java
...\.......\...........\.....\ExpandableDictionary.java
...\.......\...........\.....\AutoDictionary.java
...\.......\...........\.....\MekDictionary.java
...\.......\...........\.....\BinaryDictionary.java
...\.......\...........\.....\ContactsDictionary$1.java
...\.......\...........\.....\ContactsDictionary.java
...\.......\...........\.....\LatinIME.java
...\.......\...........\.....\Suggest.java
...\.......\...........\.....\UserDictionary$1.java
...\.......\...........\.....\UserDictionary.java
...\.......\...........\.....\WordComposer.java
...\google\android\inputmethod\pinyin\AccountActivity.java
...\......\.......\...........\......\AdjacencyMap.java
...\......\.......\...........\......\AdvancedSettings.java
...\......\.......\...........\......\AdvancedSettingsActivity$1.java
...\......\.......\...........\......\AdvancedSettingsActivity$2.java
...\......\.......\...........\......\AdvancedSettingsActivity$3.java
...\......\.......\...........\......\AdvancedSettingsActivity.java
...\......\.......\...........\......\AnimationHelper$1.java
...\......\.......\...........\......\AnimationHelper$2.java
...\......\.......\...........\......\AnimationHelper.java
...\......\.......\...........\......\ArrowUpdater.java
...\......\.......\...........\......\AuthHandler.java
...\......\.......\...........\......\AuthHandlerImpl.java
...\......\.......\...........\......\BalloonHint.java
...\......\.......\...........\......\BroadcastMonitor.java
...\......\.......\...........\......\CandidateFormatter.java
...\......\.......\...........\......\CandidateView.java
...\......\.......\...........\......\CandidateViewListener.java
...\......\.......\...........\......\CandidatesContainer.java
...\......\.......\...........\......\CapitalManager.java
...\......\.......\...........\......\ClearTask.java
...\......\.......\...........\......\ComposingView.java
...\......\.......\...........\......\DataService$1.java
...\......\.......\...........\......\IDataService.java
...\......\.......\...........\......\DataService$2.java
...\......\.......\...........\......\DataService.java
...\......\.......\...........\......\IDecoder.java
...\......\.......\...........\......\Decoder.java
...\......\.......\...........\......\DecoderService.java
...\......\.......\...........\......\EnglishInputProcessor.java
...\......\.......\...........\......\Environment.java
...\......\.......\...........\......\EventListener.java
...\......\.......\...........\......\GooglePinyinImeTutorialActivity.java
...\......\.......\...........\......\InputModeSwitcher.java
...\......\.......\...........\......\KeyIconRecord.java
...\......\.......\...........\......\KeyMap.java
...\......\.......\...........\......\KeyPressLog.java
...\......\.......\...........\......\KeyRecord.java
...\......\.......\...........\......\MessageTypes.java
...\......\.......\...........\......\PinyinIME$1.java
...\......\.......\...........\......\PinyinIME$2.java
...\......\.......\...........\......\PinyinIME$DecodingInfo$1.java
...\......\.......\...........\......\PinyinIME.java
...\......\.......\...........\......\PunctuationBasedCapitalManager.java
...\......\.......\...........\......\R.java
...\......\.......\...........\......\ScTcConverter.java
...\......\.......\...........\......\Settings.java
...\......\.......\...........\......\SettingsActivity$1.java
...\......\.......\...........\......\SettingsActivity.java
...\......\.......\...........\......\SkbContainer.java
...\......\.......\...........\......\SkbPool.java
...\......\.......\...........\......\SkbTemplate.java
...\......\.......\...........\......\SoftKey.java
...\......\.......\...........\......\SoftKeyToggle.java
...\......\.......\...........\......\SoftKeyType.java
...\......\.......\...........\......\SoftKeyboard.java
...\......\.......\...........\......\SoftKeyboardView$1.java
...\......\.......\...........\......\SoftKeyboardView.java
...\......\.......\...........\......\SoundManager.java
...\......\.......\...........\......\SyncEngine.jav

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