DictionaryPackInstallBroadcastReceiver.java revision a28a05e971cc242b338331a3b78276fa95188d19 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 * use this file except in compliance with the License. You may obtain a copy of
6 * the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License.
15 */
16
17package com.android.inputmethod.latin;
18
19import android.content.BroadcastReceiver;
20import android.content.Context;
21import android.content.Intent;
22import android.content.pm.PackageInfo;
23import android.content.pm.PackageManager;
24import android.content.pm.ProviderInfo;
25import android.net.Uri;
26
27/**
28 * Takes action to reload the necessary data when a dictionary pack was added/removed.
29 */
30public final class DictionaryPackInstallBroadcastReceiver extends BroadcastReceiver {
31
32    final LatinIME mService;
33    /**
34     * The action of the intent for publishing that new dictionary data is available.
35     */
36    /* package */ static final String NEW_DICTIONARY_INTENT_ACTION =
37            "com.android.inputmethod.latin.dictionarypack.newdict";
38
39    public DictionaryPackInstallBroadcastReceiver(final LatinIME service) {
40        mService = service;
41    }
42
43    @Override
44    public void onReceive(Context context, Intent intent) {
45        final String action = intent.getAction();
46        final PackageManager manager = context.getPackageManager();
47
48        // We need to reread the dictionary if a new dictionary package is installed.
49        if (action.equals(Intent.ACTION_PACKAGE_ADDED)) {
50            final Uri packageUri = intent.getData();
51            if (null == packageUri) return; // No package name : we can't do anything
52            final String packageName = packageUri.getSchemeSpecificPart();
53            if (null == packageName) return;
54            // TODO: do this in a more appropriate place
55            TargetApplicationGetter.removeApplicationInfoCache(packageName);
56            final PackageInfo packageInfo;
57            try {
58                packageInfo = manager.getPackageInfo(packageName, PackageManager.GET_PROVIDERS);
59            } catch (android.content.pm.PackageManager.NameNotFoundException e) {
60                return; // No package info : we can't do anything
61            }
62            final ProviderInfo[] providers = packageInfo.providers;
63            if (null == providers) return; // No providers : it is not a dictionary.
64
65            // Search for some dictionary pack in the just-installed package. If found, reread.
66            for (ProviderInfo info : providers) {
67                if (BinaryDictionary.DICTIONARY_PACK_AUTHORITY.equals(info.authority)) {
68                    mService.resetSuggestMainDict();
69                    return;
70                }
71            }
72            // If we come here none of the authorities matched the one we searched for.
73            // We can exit safely.
74            return;
75        } else if (action.equals(Intent.ACTION_PACKAGE_REMOVED)
76                && !intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) {
77            // When the dictionary package is removed, we need to reread dictionary (to use the
78            // next-priority one, or stop using a dictionary at all if this was the only one,
79            // since this is the user request).
80            // If we are replacing the package, we will receive ADDED right away so no need to
81            // remove the dictionary at the moment, since we will do it when we receive the
82            // ADDED broadcast.
83
84            // TODO: Only reload dictionary on REMOVED when the removed package is the one we
85            // read dictionary from?
86            mService.resetSuggestMainDict();
87        } else if (action.equals(NEW_DICTIONARY_INTENT_ACTION)) {
88            mService.resetSuggestMainDict();
89        }
90    }
91}
92