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      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 
     17 package com.example.android.supportpreference;
     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 SupportPreferenceDemos extends ListActivity {
     37     @Override
     38     public void onCreate(Bundle savedInstanceState) {
     39         super.onCreate(savedInstanceState);
     40 
     41         Intent intent = getIntent();
     42         String path = intent.getStringExtra("com.example.android.apis.Path");
     43 
     44         if (path == null) {
     45             path = "";
     46         }
     47 
     48         setListAdapter(new SimpleAdapter(this, getData(path),
     49                 android.R.layout.simple_list_item_1, new String[] { "title" },
     50                 new int[] { android.R.id.text1 }));
     51         getListView().setTextFilterEnabled(true);
     52     }
     53 
     54     protected List<Map<String, Object>> getData(String prefix) {
     55         List<Map<String, Object>> myData = new ArrayList<>();
     56 
     57         Intent mainIntent = new Intent(Intent.ACTION_MAIN, null);
     58         mainIntent.addCategory("com.example.android.supportpreference.SAMPLE_CODE");
     59 
     60         PackageManager pm = getPackageManager();
     61         List<ResolveInfo> list = pm.queryIntentActivities(mainIntent, 0);
     62 
     63         if (null == list)
     64             return myData;
     65 
     66         String[] prefixPath;
     67         String prefixWithSlash = prefix;
     68 
     69         if (prefix.equals("")) {
     70             prefixPath = null;
     71         } else {
     72             prefixPath = prefix.split("/");
     73             prefixWithSlash = prefix + "/";
     74         }
     75 
     76         int len = list.size();
     77 
     78         Map<String, Boolean> entries = new HashMap<>();
     79 
     80         for (int i = 0; i < len; i++) {
     81             ResolveInfo info = list.get(i);
     82             CharSequence labelSeq = info.loadLabel(pm);
     83             String label = labelSeq != null
     84                     ? labelSeq.toString()
     85                     : info.activityInfo.name;
     86 
     87             if (prefixWithSlash.length() == 0 || label.startsWith(prefixWithSlash)) {
     88 
     89                 String[] labelPath = label.split("/");
     90 
     91                 String nextLabel = prefixPath == null ? labelPath[0] : labelPath[prefixPath.length];
     92 
     93                 if ((prefixPath != null ? prefixPath.length : 0) == labelPath.length - 1) {
     94                     addItem(myData, nextLabel, activityIntent(
     95                             info.activityInfo.applicationInfo.packageName,
     96                             info.activityInfo.name));
     97                 } else {
     98                     if (entries.get(nextLabel) == null) {
     99                         addItem(myData, nextLabel, browseIntent(
    100                                 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                 @Override
    117                 public int compare(Map<String, Object> map1, Map<String, Object> map2) {
    118                     return collator.compare(map1.get("title"), map2.get("title"));
    119                 }
    120             };
    121 
    122     protected Intent activityIntent(String pkg, String componentName) {
    123         Intent result = new Intent();
    124         result.setClassName(pkg, componentName);
    125         return result;
    126     }
    127 
    128     protected Intent browseIntent(String path) {
    129         Intent result = new Intent();
    130         result.setClass(this, SupportPreferenceDemos.class);
    131         result.putExtra("com.example.android.apis.Path", path);
    132         return result;
    133     }
    134 
    135     protected void addItem(List<Map<String, Object>> data, String name, Intent intent) {
    136         Map<String, Object> temp = new HashMap<>();
    137         temp.put("title", name);
    138         temp.put("intent", intent);
    139         data.add(temp);
    140     }
    141 
    142     @Override
    143     @SuppressWarnings("unchecked")
    144     protected void onListItemClick(ListView l, View v, int position, long id) {
    145         Map<String, Object> map = (Map<String, Object>)l.getItemAtPosition(position);
    146 
    147         Intent intent = (Intent) map.get("intent");
    148         startActivity(intent);
    149     }
    150 }
    151