MainActivity.java revision a5e0a5c53719f8501c814c4673d28964dee15c9c 
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
20package com.example.android.helloPDK;
21
22import android.app.ListActivity;
23import android.content.Intent;
24import android.content.pm.PackageManager;
25import android.content.pm.ResolveInfo;
26import android.os.Bundle;
27import android.view.View;
28import android.widget.ListView;
29import android.widget.SimpleAdapter;
30
31import java.text.Collator;
32import java.util.ArrayList;
33import java.util.Collections;
34import java.util.Comparator;
35import java.util.HashMap;
36import java.util.List;
37import java.util.Map;
38
39public class MainActivity extends ListActivity {
40
41    @Override
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
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
124    protected Intent activityIntent(String pkg, String componentName) {
125        Intent result = new Intent();
126        result.setClassName(pkg, componentName);
127        return result;
128    }
129
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
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")
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