AppGridView.java revision abdeead11486a2a6f9c1b623035661b01b209d9f 
1/*
2 * Copyright (C) 2016 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.settings.display;
18
19import android.content.Context;
20import android.content.Intent;
21import android.content.pm.PackageManager;
22import android.content.pm.ResolveInfo;
23import android.graphics.drawable.Drawable;
24import android.os.UserHandle;
25import android.support.annotation.VisibleForTesting;
26import android.util.AttributeSet;
27import android.util.IconDrawableFactory;
28import android.view.View;
29import android.view.ViewGroup;
30import android.widget.ArrayAdapter;
31import android.widget.GridView;
32import android.widget.ImageView;
33
34import com.android.settings.R;
35
36import java.util.ArrayList;
37import java.util.Collections;
38import java.util.List;
39
40public class AppGridView extends GridView {
41    public AppGridView(Context context) {
42        this(context, null);
43    }
44
45    public AppGridView(Context context, AttributeSet attrs) {
46        this(context, attrs, 0);
47    }
48
49    public AppGridView(Context context, AttributeSet attrs, int defStyleAttr) {
50        this(context, attrs, defStyleAttr, 0);
51    }
52
53    public AppGridView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleResId) {
54        super(context, attrs, defStyleAttr, defStyleResId);
55
56        setNumColumns(AUTO_FIT);
57
58        final int columnWidth = getResources().getDimensionPixelSize(
59                R.dimen.screen_zoom_preview_app_icon_width);
60        setColumnWidth(columnWidth);
61
62        setAdapter(new AppsAdapter(context, R.layout.screen_zoom_preview_app_icon,
63                android.R.id.text1, android.R.id.icon1));
64    }
65
66    /**
67     * Loads application labels and icons.
68     */
69    @VisibleForTesting
70    public static class AppsAdapter extends ArrayAdapter<ActivityEntry> {
71        private final PackageManager mPackageManager;
72        private final int mIconResId;
73
74        public AppsAdapter(Context context, int layout, int textResId, int iconResId) {
75            super(context, layout, textResId);
76
77            mIconResId = iconResId;
78            mPackageManager = context.getPackageManager();
79
80            loadAllApps();
81        }
82
83        @Override
84        public View getView(int position, View convertView, ViewGroup parent) {
85            final View view = super.getView(position, convertView, parent);
86            final ActivityEntry entry = getItem(position);
87            final ImageView iconView = view.findViewById(mIconResId);
88            iconView.setImageDrawable(entry.getIcon());
89            return view;
90        }
91
92        @Override
93        public boolean hasStableIds() {
94            return true;
95        }
96
97        @Override
98        public long getItemId(int position) {
99            return position;
100        }
101
102        @Override
103        public boolean isEnabled(int position) {
104            return false;
105        }
106
107        private void loadAllApps() {
108            final Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
109            mainIntent.addCategory(Intent.CATEGORY_LAUNCHER);
110
111            final PackageManager pm = mPackageManager;
112            final ArrayList<ActivityEntry> results = new ArrayList<>();
113            final List<ResolveInfo> infos = pm.queryIntentActivities(mainIntent, 0);
114            final IconDrawableFactory iconFactory = IconDrawableFactory.newInstance(getContext());
115            for (ResolveInfo info : infos) {
116                final CharSequence label = info.loadLabel(pm);
117                if (label != null) {
118                    results.add(new ActivityEntry(info, label.toString(), iconFactory));
119                }
120            }
121
122            Collections.sort(results);
123
124            addAll(results);
125        }
126    }
127
128    /**
129     * Class used for caching the activity label and icon.
130     */
131    @VisibleForTesting
132    public static class ActivityEntry implements Comparable<ActivityEntry> {
133
134        public final ResolveInfo info;
135        public final String label;
136        private final IconDrawableFactory mIconFactory;
137        private final int mUserId;
138
139        public ActivityEntry(ResolveInfo info, String label, IconDrawableFactory iconFactory) {
140            this.info = info;
141            this.label = label;
142            mIconFactory = iconFactory;
143            mUserId = UserHandle.myUserId();
144        }
145
146        @Override
147        public int compareTo(ActivityEntry entry) {
148            return label.compareToIgnoreCase(entry.label);
149        }
150
151        @Override
152        public String toString() {
153            return label;
154        }
155
156        public Drawable getIcon() {
157            return mIconFactory.getBadgedIcon(
158                    info.activityInfo, info.activityInfo.applicationInfo, mUserId);
159        }
160    }
161}
162