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      1 /*
      2  * Copyright (C) 2007 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 package com.example.android.apis;
     18 
     19 import android.app.ListActivity;
     20 import android.content.Intent;
     21 import android.content.pm.PackageManager;
     22 import android.content.pm.ResolveInfo;
     23 import android.os.Bundle;
     24 import android.view.View;
     25 import android.widget.ListView;
     26 import android.widget.SimpleAdapter;
     27 
     28 import java.text.Collator;
     29 import java.util.ArrayList;
     30 import java.util.Collections;
     31 import java.util.Comparator;
     32 import java.util.HashMap;
     33 import java.util.List;
     34 import java.util.Map;
     35 
     36 public class ApiDemos extends ListActivity {
     37 
     38     @Override
     39     public void onCreate(Bundle savedInstanceState) {
     40         super.onCreate(savedInstanceState);
     41 
     42         Intent intent = getIntent();
     43         String path = intent.getStringExtra("com.example.android.apis.Path");
     44 
     45         if (path == null) {
     46             path = "";
     47         }
     48 
     49         setListAdapter(new SimpleAdapter(this, getData(path),
     50                 android.R.layout.simple_list_item_1, new String[] { "title" },
     51                 new int[] { android.R.id.text1 }));
     52         getListView().setTextFilterEnabled(true);
     53     }
     54 
     55     protected List<Map<String, Object>> getData(String prefix) {
     56         List<Map<String, Object>> myData = new ArrayList<Map<String, Object>>();
     57 
     58         Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
     59         mainIntent.addCategory(Intent.CATEGORY_SAMPLE_CODE);
     60 
     61         PackageManager pm = getPackageManager();
     62         List<ResolveInfo> list = pm.queryIntentActivities(mainIntent, 0);
     63 
     64         if (null == list)
     65             return myData;
     66 
     67         String[] prefixPath;
     68         String prefixWithSlash = prefix;
     69 
     70         if (prefix.equals("")) {
     71             prefixPath = null;
     72         } else {
     73             prefixPath = prefix.split("/");
     74             prefixWithSlash = prefix + "/";
     75         }
     76 
     77         int len = list.size();
     78 
     79         Map<String, Boolean> entries = new HashMap<String, Boolean>();
     80 
     81         for (int i = 0; i < len; i++) {
     82             ResolveInfo info = list.get(i);
     83             CharSequence labelSeq = info.loadLabel(pm);
     84             String label = labelSeq != null
     85                     ? labelSeq.toString()
     86                     : info.activityInfo.name;
     87 
     88             if (prefixWithSlash.length() == 0 || label.startsWith(prefixWithSlash)) {
     89 
     90                 String[] labelPath = label.split("/");
     91 
     92                 String nextLabel = prefixPath == null ? labelPath[0] : labelPath[prefixPath.length];
     93 
     94                 if ((prefixPath != null ? prefixPath.length : 0) == labelPath.length - 1) {
     95                     addItem(myData, nextLabel, activityIntent(
     96                             info.activityInfo.applicationInfo.packageName,
     97                             info.activityInfo.name));
     98                 } else {
     99                     if (entries.get(nextLabel) == null) {
    100                         addItem(myData, nextLabel, browseIntent(prefix.equals("") ? nextLabel : prefix + "/" + nextLabel));
    101                         entries.put(nextLabel, true);
    102                     }
    103                 }
    104             }
    105         }
    106 
    107         Collections.sort(myData, sDisplayNameComparator);
    108 
    109         return myData;
    110     }
    111 
    112     private final static Comparator<Map<String, Object>> sDisplayNameComparator =
    113         new Comparator<Map<String, Object>>() {
    114         private final Collator   collator = Collator.getInstance();
    115 
    116         public int compare(Map<String, Object> map1, Map<String, Object> map2) {
    117             return collator.compare(map1.get("title"), map2.get("title"));
    118         }
    119     };
    120 
    121     protected Intent activityIntent(String pkg, String componentName) {
    122         Intent result = new Intent();
    123         result.setClassName(pkg, componentName);
    124         return result;
    125     }
    126 
    127     protected Intent browseIntent(String path) {
    128         Intent result = new Intent();
    129         result.setClass(this, ApiDemos.class);
    130         result.putExtra("com.example.android.apis.Path", path);
    131         return result;
    132     }
    133 
    134     protected void addItem(List<Map<String, Object>> data, String name, Intent intent) {
    135         Map<String, Object> temp = new HashMap<String, Object>();
    136         temp.put("title", name);
    137         temp.put("intent", intent);
    138         data.add(temp);
    139     }
    140 
    141     @Override
    142     @SuppressWarnings("unchecked")
    143     protected void onListItemClick(ListView l, View v, int position, long id) {
    144         Map<String, Object> map = (Map<String, Object>)l.getItemAtPosition(position);
    145 
    146         Intent intent = new Intent((Intent) map.get("intent"));
    147         intent.addCategory(Intent.CATEGORY_SAMPLE_CODE);
    148         startActivity(intent);
    149     }
    150 }
    151