1 /*
2  * Copyright (C) 2012 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 
17 // code originally from development samples ApiDemos
18 // list all HelloPDK activities
19 
20 package com.example.android.helloPDK;
21 
22 import android.app.ListActivity;
23 import android.content.Intent;
24 import android.content.pm.PackageManager;
25 import android.content.pm.ResolveInfo;
26 import android.os.Bundle;
27 import android.view.View;
28 import android.widget.ListView;
29 import android.widget.SimpleAdapter;
30 
31 import java.text.Collator;
32 import java.util.ArrayList;
33 import java.util.Collections;
34 import java.util.Comparator;
35 import java.util.HashMap;
36 import java.util.List;
37 import java.util.Map;
38 
39 public class MainActivity extends ListActivity {
40 
41     @Override
onCreate(Bundle savedInstanceState)42     public void onCreate(Bundle savedInstanceState) {
43         super.onCreate(savedInstanceState);
44 
45         Intent intent = getIntent();
46         String path = intent.getStringExtra("com.example.android.helloPDK.Path");
47 
48         if (path == null) {
49             path = "";
50         }
51 
52         setListAdapter(new SimpleAdapter(this, getData(path),
53                 android.R.layout.simple_list_item_1, new String[] { "title" },
54                 new int[] { android.R.id.text1 }));
55         getListView().setTextFilterEnabled(true);
56     }
57 
getData(String prefix)58     protected List<Map<String, Object>> getData(String prefix) {
59         List<Map<String, Object>> myData = new ArrayList<Map<String, Object>>();
60 
61         Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
62         mainIntent.addCategory(Intent.CATEGORY_SAMPLE_CODE);
63 
64         PackageManager pm = getPackageManager();
65         List<ResolveInfo> list = pm.queryIntentActivities(mainIntent, 0);
66 
67         if (null == list)
68             return myData;
69 
70         String[] prefixPath;
71         String prefixWithSlash = prefix;
72 
73         if (prefix.equals("")) {
74             prefixPath = null;
75         } else {
76             prefixPath = prefix.split("/");
77             prefixWithSlash = prefix + "/";
78         }
79 
80         int len = list.size();
81 
82         Map<String, Boolean> entries = new HashMap<String, Boolean>();
83 
84         for (int i = 0; i < len; i++) {
85             ResolveInfo info = list.get(i);
86             CharSequence labelSeq = info.loadLabel(pm);
87             String label = labelSeq != null ? labelSeq.toString() : info.activityInfo.name;
88 
89             if (prefixWithSlash.length() == 0 || label.startsWith(prefixWithSlash)) {
90 
91                 String[] labelPath = label.split("/");
92 
93                 String nextLabel = prefixPath ==
94                         null ? labelPath[0] : labelPath[prefixPath.length];
95 
96                 if ((prefixPath != null ? prefixPath.length : 0) == labelPath.length - 1) {
97                     addItem(myData, nextLabel, activityIntent(
98                             info.activityInfo.applicationInfo.packageName,
99                             info.activityInfo.name));
100                 } else {
101                     if (entries.get(nextLabel) == null) {
102                         addItem(myData, nextLabel, browseIntent(prefix.equals("") ?
103                                 nextLabel : prefix + "/" + nextLabel));
104                         entries.put(nextLabel, true);
105                     }
106                 }
107             }
108         }
109 
110         Collections.sort(myData, sDisplayNameComparator);
111 
112         return myData;
113     }
114 
115     private final static Comparator<Map<String, Object>> sDisplayNameComparator =
116             new Comparator<Map<String, Object>>() {
117         private final Collator   collator = Collator.getInstance();
118 
119         public int compare(Map<String, Object> map1, Map<String, Object> map2) {
120             return collator.compare(map1.get("title"), map2.get("title"));
121         }
122     };
123 
activityIntent(String pkg, String componentName)124     protected Intent activityIntent(String pkg, String componentName) {
125         Intent result = new Intent();
126         result.setClassName(pkg, componentName);
127         return result;
128     }
129 
browseIntent(String path)130     protected Intent browseIntent(String path) {
131         Intent result = new Intent();
132         result.setClass(this, MainActivity.class);
133         result.putExtra("com.example.android.helloPDK.Path", path);
134         return result;
135     }
136 
addItem(List<Map<String, Object>> data, String name, Intent intent)137     protected void addItem(List<Map<String, Object>> data, String name, Intent intent) {
138         Map<String, Object> temp = new HashMap<String, Object>();
139         temp.put("title", name);
140         temp.put("intent", intent);
141         data.add(temp);
142     }
143 
144     @Override
145     @SuppressWarnings("unchecked")
onListItemClick(ListView l, View v, int position, long id)146     protected void onListItemClick(ListView l, View v, int position, long id) {
147         Map<String, Object> map = (Map<String, Object>)l.getItemAtPosition(position);
148 
149         Intent intent = (Intent) map.get("intent");
150         startActivity(intent);
151     }
152 }
153