Clear cache of user dic

package com.android.inputmethod.latin.spellcheck;

import android.content.ContentResolver;

import android.database.ContentObserver;

import android.provider.UserDictionary.Words;

import android.service.textservice.SpellCheckerService.Session;

import android.text.TextUtils;

import android.util.Log;

    private int mScript; // One of SCRIPT_LATIN or SCRIPT_CYRILLIC for now.

    private final AndroidSpellCheckerService mService;

    protected final SuggestionsCache mSuggestionsCache = new SuggestionsCache();

    private final ContentObserver mObserver;

    private static class SuggestionsParams {

        public final String[] mSuggestions;

            mUnigramSuggestionsInfoCache.put(

                    generateKey(query, prevWord), new SuggestionsParams(suggestions, flags));

        }

        public void clearCache() {

            mUnigramSuggestionsInfoCache.evictAll();

        }

    }

    AndroidWordLevelSpellCheckerSession(final AndroidSpellCheckerService service) {

        mService = service;

        final ContentResolver cres = service.getContentResolver();

        mObserver = new ContentObserver(null) {

            @Override

            public void onChange(boolean self) {

                mSuggestionsCache.clearCache();

            }

        };

        cres.registerContentObserver(Words.CONTENT_URI, true, mObserver);

    }

    @Override

        mScript = AndroidSpellCheckerService.getScriptFromLocale(mLocale);

    }

    @Override

    public void onClose() {

        final ContentResolver cres = mService.getContentResolver();

        cres.unregisterContentObserver(mObserver);

    }

    /*

     * Returns whether the code point is a letter that makes sense for the specified

     * locale for this spell checker.