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      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 package com.example.android.appnavigation.app;
     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.view.ViewGroup;
     26 import android.widget.BaseAdapter;
     27 import android.widget.ListView;
     28 import android.widget.TextView;
     29 
     30 import java.util.ArrayList;
     31 import java.util.List;
     32 
     33 /**
     34  * Home activity for app navigation code samples.
     35  */
     36 public class AppNavHomeActivity extends ListActivity {
     37     @Override
     38     protected void onCreate(Bundle savedInstanceState) {
     39         super.onCreate(savedInstanceState);
     40 
     41         setListAdapter(new SampleAdapter(querySampleActivities()));
     42     }
     43 
     44     @Override
     45     protected void onListItemClick(ListView lv, View v, int pos, long id) {
     46         SampleInfo info = (SampleInfo) getListAdapter().getItem(pos);
     47         startActivity(info.intent);
     48     }
     49 
     50     protected List<SampleInfo> querySampleActivities() {
     51         Intent intent = new Intent(Intent.ACTION_MAIN, null);
     52         intent.setPackage(getPackageName());
     53         intent.addCategory(Intent.CATEGORY_SAMPLE_CODE);
     54 
     55         PackageManager pm = getPackageManager();
     56         List<ResolveInfo> infos = pm.queryIntentActivities(intent, 0);
     57 
     58         ArrayList<SampleInfo> samples = new ArrayList<SampleInfo>();
     59 
     60         final int count = infos.size();
     61         for (int i = 0; i < count; i++) {
     62             final ResolveInfo info = infos.get(i);
     63             final CharSequence labelSeq = info.loadLabel(pm);
     64             String label = labelSeq != null ? labelSeq.toString() : info.activityInfo.name;
     65 
     66             Intent target = new Intent();
     67             target.setClassName(info.activityInfo.applicationInfo.packageName,
     68                     info.activityInfo.name);
     69             SampleInfo sample = new SampleInfo(label, target);
     70             samples.add(sample);
     71         }
     72 
     73         return samples;
     74     }
     75 
     76     static class SampleInfo {
     77         String name;
     78         Intent intent;
     79 
     80         SampleInfo(String name, Intent intent) {
     81             this.name = name;
     82             this.intent = intent;
     83         }
     84     }
     85 
     86     class SampleAdapter extends BaseAdapter {
     87         private List<SampleInfo> mItems;
     88 
     89         public SampleAdapter(List<SampleInfo> items) {
     90             mItems = items;
     91         }
     92 
     93         @Override
     94         public int getCount() {
     95             return mItems.size();
     96         }
     97 
     98         @Override
     99         public Object getItem(int position) {
    100             return mItems.get(position);
    101         }
    102 
    103         @Override
    104         public long getItemId(int position) {
    105             return position;
    106         }
    107 
    108         @Override
    109         public View getView(int position, View convertView, ViewGroup parent) {
    110             if (convertView == null) {
    111                 convertView = getLayoutInflater().inflate(android.R.layout.simple_list_item_1,
    112                         parent, false);
    113                 convertView.setTag(convertView.findViewById(android.R.id.text1));
    114             }
    115             TextView tv = (TextView) convertView.getTag();
    116             tv.setText(mItems.get(position).name);
    117             return convertView;
    118         }
    119 
    120     }
    121 }
    122