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 onCreate(Bundle savedInstanceState)38 protected void onCreate(Bundle savedInstanceState) { 39 super.onCreate(savedInstanceState); 40 41 setListAdapter(new SampleAdapter(querySampleActivities())); 42 } 43 44 @Override onListItemClick(ListView lv, View v, int pos, long id)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 querySampleActivities()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 SampleInfo(String name, Intent intent)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 SampleAdapter(List<SampleInfo> items)89 public SampleAdapter(List<SampleInfo> items) { 90 mItems = items; 91 } 92 93 @Override getCount()94 public int getCount() { 95 return mItems.size(); 96 } 97 98 @Override getItem(int position)99 public Object getItem(int position) { 100 return mItems.get(position); 101 } 102 103 @Override getItemId(int position)104 public long getItemId(int position) { 105 return position; 106 } 107 108 @Override getView(int position, View convertView, ViewGroup parent)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