A talk on Designing for Android: Up and Back Again by Marvin Bernal at Toronto Android Developer Group hosted by Shopify on April 13, 2016.

1. Up & Back Again
Designing for Android
with Marvin Bernal

2. About Me
Marvin Bernal
Android Developer at TWG

3. Why?

4. Designing for different platforms is a lot like travelling
through different countries.

6. Navigation on Android

7. Back, Home and Recents

8. The Back Button

9. With great power comes great responsibility
–

10. It’s terribly confusing

11. … but we can fix this!

13. What will happen
if I press the back
button?

14. Back

15. Back Back?

16. Up vs. Back

18. Back Up

19. Up = Hierarchical Navigation

22. Back = Temporal Navigation

23. … so how do you do this?

24. @Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
onBackPressed();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
MainActivity.java

25. @Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
// Respond to the action bar's Up/Home button
case android.R.id.home:
NavUtils.navigateUpFromSameTask();
return true;
default:
return super.onOptionsItemSelected(item);
}
}
MainActivity.java

26. <application ... >
...
<!-- The main/home activity (it has no parent activity) -->
<activity
android:name=“ParentActivity" ...>
...
</activity>
<!-- A child of the main activity -->
<activity
android:name="ChildActivity"
android:parentActivityName=“ParentActivity"/>
</application>
AndroidManifest.xml

27. Just remember

28. With great power comes great responsibility
–

29. marvinbernal.com
@AeroEchelon
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