1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of 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,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package com.android.wallpaper.module;
17 
18 import android.content.Context;
19 import android.content.Intent;
20 import android.content.pm.PackageManager;
21 import android.content.pm.ResolveInfo;
22 import android.net.Uri;
23 import android.os.AsyncTask;
24 
25 import java.util.HashMap;
26 import java.util.List;
27 import java.util.Map;
28 
29 import androidx.annotation.Nullable;
30 
31 /**
32  * Checks whether an explore action can be taken for the given uri, i.e. whether any activity on
33  * the device is capable of handling it.
34  */
35 public class DefaultExploreIntentChecker implements ExploreIntentChecker {
36     private Context mAppContext;
37 
38     private Map<Uri, Intent> mUriToActionViewIntentMap;
39 
DefaultExploreIntentChecker(Context appContext)40     public DefaultExploreIntentChecker(Context appContext) {
41         mAppContext = appContext;
42         mUriToActionViewIntentMap = new HashMap<>();
43     }
44 
45     @Override
fetchValidActionViewIntent(Uri uri, IntentReceiver receiver)46     public void fetchValidActionViewIntent(Uri uri, IntentReceiver receiver) {
47         if (mUriToActionViewIntentMap.containsKey(uri)) {
48             receiver.onIntentReceived(mUriToActionViewIntentMap.get(uri));
49             return;
50         }
51 
52         new FetchActionViewIntentTask(mAppContext, uri, receiver).execute();
53     }
54 
55     private class FetchActionViewIntentTask extends AsyncTask<Void, Void, Intent> {
56         private Context mAppContext;
57         private Uri mUri;
58         private IntentReceiver mReceiver;
59 
FetchActionViewIntentTask(Context appContext, Uri uri, IntentReceiver receiver)60         public FetchActionViewIntentTask(Context appContext, Uri uri, IntentReceiver receiver) {
61             mAppContext = appContext;
62             mUri = uri;
63             mReceiver = receiver;
64         }
65 
66         @Nullable
67         @Override
doInBackground(Void... params)68         protected Intent doInBackground(Void... params) {
69             Intent actionViewIntent = new Intent(Intent.ACTION_VIEW, mUri);
70 
71             PackageManager pm = mAppContext.getPackageManager();
72             List<ResolveInfo> activities = pm.queryIntentActivities(actionViewIntent, /* flags */ 0);
73 
74             Intent result = activities.isEmpty() ? null : actionViewIntent;
75             mUriToActionViewIntentMap.put(mUri, result);
76 
77             return result;
78         }
79 
80         @Override
onPostExecute(Intent intent)81         protected void onPostExecute(Intent intent) {
82             mReceiver.onIntentReceived(intent);
83         }
84     }
85 }
86 
87