1. Favorite Twitter Searches App
CS7030: Mobile App Development

2. Technologies Overview
1. ScrollView
A ViewGroup that can contain other views and that lets user scroll
CS7030: Mobile App Development

3. Technologies Overview
2. Create Resource Files
colors.xml @color/color_name
dimen.xml @dimen/dimen_name
Density-independent pixel (dp or dip)
Scale-independent pixel (sp)
CS7030: Mobile App Development

4. Technologies Overview
3. AlertDialog
A modal dialog which user can interact with the app
AlertDialog.Builder to create the AlertDialog
CS7030: Mobile App Development

5. Technologies Overview
4. SharedPreference
Save key/values pairs associated with apps
The key must be string, the values can be Strings or primitive-type values
SharedPreference.Editor to modify the content
CS7030: Mobile App Development

6. SharedPreference Get SharedPreference Save to SharedPreference
savedSearches = getSharedPreferences("searches",MODE_PRIVATE);
MODE_PRIVATE
MODE_WORLD_READABLE
MODE_WORLD_WRITABLE
Save to SharedPreference
SharedPreferences.Editor spe = savedSearches.edit(); spe.putString(tag, query); spe.apply();
Retrieve from SharedPreference
Map<String,?> queryMap = savedSearches.getAll(); Set<String> tagSet = queryMap.keySet(); String[] tags = tagSet.toArray(new String[0]); Arrays.sort(tags,String.CASE_INSENSITIVE_ORDER);
CS7030: Mobile App Development

7. Technologies Overview
5. LayoutInflater
Programmatically create GUI components from a predefined XML layout
getSystemService(Context.LAYOUT_INFLATER_SERVICE);
CS7030: Mobile App Development

8. Technologies Overview
6. Intents
Intent queryIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(“ + query)); startActivity(queryIntent);
CS7030: Mobile App Development