PreviewInflater.java revision 781c29c9a866dbf0a01d76838e912a5fec9247fe 
1/*
2 * Copyright (C) 2014 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
17package com.android.systemui.statusbar.policy;
18
19import android.content.Context;
20import android.content.Intent;
21import android.content.pm.PackageManager;
22import android.content.pm.ResolveInfo;
23import android.content.pm.UserInfo;
24import android.os.UserHandle;
25import android.util.Log;
26import android.view.LayoutInflater;
27import android.view.View;
28
29import com.android.internal.widget.LockPatternUtils;
30import com.android.keyguard.KeyguardActivityLauncher;
31import com.android.systemui.statusbar.phone.KeyguardPreviewContainer;
32
33import java.util.List;
34
35/**
36 * Utility class to inflate previews for phone and camera affordance.
37 */
38public class PreviewInflater {
39
40    private static final String TAG = "PreviewInflater";
41
42    private static final String META_DATA_KEYGUARD_LAYOUT = "com.android.keyguard.layout";
43
44    private Context mContext;
45    private LockPatternUtils mLockPatternUtils;
46
47    public PreviewInflater(Context context, LockPatternUtils lockPatternUtils) {
48        mContext = context;
49        mLockPatternUtils = lockPatternUtils;
50    }
51
52    public View inflatePreview(Intent intent) {
53        WidgetInfo info = getWidgetInfo(intent);
54        if (info == null) {
55            return null;
56        }
57        View v = inflateWidgetView(info);
58        if (v == null) {
59            return null;
60        }
61        KeyguardPreviewContainer container = new KeyguardPreviewContainer(mContext, null);
62        container.addView(v);
63        return container;
64    }
65
66    private View inflateWidgetView(WidgetInfo widgetInfo) {
67        View widgetView = null;
68        try {
69            Context appContext = mContext.createPackageContext(
70                    widgetInfo.contextPackage, Context.CONTEXT_RESTRICTED);
71            LayoutInflater appInflater = (LayoutInflater)
72                    appContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
73            appInflater = appInflater.cloneInContext(appContext);
74            widgetView = appInflater.inflate(widgetInfo.layoutId, null, false);
75        } catch (PackageManager.NameNotFoundException|RuntimeException e) {
76            Log.w(TAG, "Error creating widget view", e);
77        }
78        return widgetView;
79    }
80
81    private WidgetInfo getWidgetInfo(Intent intent) {
82        WidgetInfo info = new WidgetInfo();
83        PackageManager packageManager = mContext.getPackageManager();
84        final List<ResolveInfo> appList = packageManager.queryIntentActivitiesAsUser(
85                intent, PackageManager.MATCH_DEFAULT_ONLY, mLockPatternUtils.getCurrentUser());
86        if (appList.size() == 0) {
87            return null;
88        }
89        ResolveInfo resolved = packageManager.resolveActivityAsUser(intent,
90                PackageManager.MATCH_DEFAULT_ONLY | PackageManager.GET_META_DATA,
91                mLockPatternUtils.getCurrentUser());
92        if (wouldLaunchResolverActivity(resolved, appList)) {
93            return null;
94        }
95        if (resolved == null || resolved.activityInfo == null) {
96            return null;
97        }
98        if (resolved.activityInfo.metaData == null || resolved.activityInfo.metaData.isEmpty()) {
99            return null;
100        }
101        int layoutId = resolved.activityInfo.metaData.getInt(META_DATA_KEYGUARD_LAYOUT);
102        if (layoutId == 0) {
103            return null;
104        }
105        info.contextPackage = resolved.activityInfo.packageName;
106        info.layoutId = layoutId;
107        return info;
108    }
109
110    public boolean wouldLaunchResolverActivity(Intent intent) {
111        PackageManager packageManager = mContext.getPackageManager();
112        final List<ResolveInfo> appList = packageManager.queryIntentActivitiesAsUser(
113                intent, PackageManager.MATCH_DEFAULT_ONLY, mLockPatternUtils.getCurrentUser());
114        if (appList.size() == 0) {
115            return false;
116        }
117        ResolveInfo resolved = packageManager.resolveActivityAsUser(intent,
118                PackageManager.MATCH_DEFAULT_ONLY | PackageManager.GET_META_DATA,
119                mLockPatternUtils.getCurrentUser());
120        return wouldLaunchResolverActivity(resolved, appList);
121    }
122
123    private boolean wouldLaunchResolverActivity(ResolveInfo resolved, List<ResolveInfo> appList) {
124        // If the list contains the above resolved activity, then it can't be
125        // ResolverActivity itself.
126        for (int i = 0; i < appList.size(); i++) {
127            ResolveInfo tmp = appList.get(i);
128            if (tmp.activityInfo.name.equals(resolved.activityInfo.name)
129                    && tmp.activityInfo.packageName.equals(resolved.activityInfo.packageName)) {
130                return false;
131            }
132        }
133        return true;
134    }
135
136    private static class WidgetInfo {
137        String contextPackage;
138        int layoutId;
139    }
140}
141