1. Intent Android Club 2015

2. Agenda Intent class Explicit activation Implicit activation

3. 2 purposes Operation to be performed (Send email) Event notification (Telegram message came)

4. I want to... Select contact Take photo Display map

5. Intent opens... Activity which can do that operation

6. Intent fields Action – desired operation Data – data associated with intent Category – additional information Type – show mime type Component – exact activity to open Extras – key-value pair Flags – flag about how intent handled

7. Action ACTION_DIAL ACTION_VIEW ACTION_SEND ACTION_MAIN

8. Action: example Intent intent = new Intent(); intent.setAction(Intent.ACTION_DIAL); startActivity(intent);

9. Data Data associated with intent URI(geo, tel, http)

10. Data: example Intent intent = new Intent(Intent.ACTION_VIEW); intent.setData(Uri.parse("geo:0.0,0.0")); startActivity(intent);

11. Data: practice Create application which opens Tashkent in Google Maps Latitude: 41.2667 Longitude: 69.2167

12. Data: example 2 Intent intent = new Intent(); intent.setAction(Intent.ACTION_DIAL); Intent.setData(Uri.parse(“tel:+9989037351 73”); startActivity(intent);

13. Data: practice 2 Create application which dials your best friends number

14. Data: example 3 Intent intent = new Intent(Intent.ACTION_VIEW); intent.setData(Uri.parse("http://google.co m")); startActivity(intent);

15. Data: practice 3 Create application which opens Facebook website

16. Category Additional information about Intent CATEGORY_BROWSABLE CATEGORY_LAUNCHER

17. Type Specifies MIME type of Intent image/png, image/jpg text/html, text/html setType() emailIntent.setType("text/html");

18. Type: example final Intent emailIntent = new Intent(android.content.Intent.ACTION_SEN D); emailIntent.setType("text/html"); emailIntent.putExtra(android.content.Intent. EXTRA_SUBJECT, subject); startActivity(intent);

19. Component Intent intent = new Intent(MainActivity.this, ActivityB.class); startActivity(intent);

20. Component: practice Create ActivityA Create ActivityB Put button on ActivityA which opens ActivityB

21. Extra Key-value pair Intent intent = new Intent(A.this, B.class); intent.putExtra(“parol”,”1234”); startActivity(intent);

22. Extra: practice Create ActivityA Create ActivityB Put button which sends “secret information” to ActivityB Secret information: We are members of Android Club Show secret information in ActivityB

23. Flags How intent should be handled FLAG_ACTIVITY_NO_HISTORY FLAG_ACTIVITY_NO_ANIMATION

24. Flags: example Intent intent = new Intent(MainActivity.this, ActivityB.class); intent.setFlags(Intent.FLAG_ACTIVITY_CL EAR_TASK|Intent.FLAG_ACTIVITY_NEW _TASK); startActivity(intent);

25. Flags: practice Create ActivityA Create ActivityB Create ActivityC Put button on A which opens B Put button on B which opens C and close A and C

26. Activation Explicit (Явный) Implicit (Неявный)

27. Implicit activation A) Calling activity B) IntentFilter

28. Intent resolution ACTION DATA CATEGORY

29. Homework 1: extra Create ActivityA Create ActivityB Put 2 EditTexts: username and password Pass username and password to ActivityB Show them in TextViews

30. Homework2: flag Create ActivityA Create ActivityB Open ActivityB without animation

31. Homework3: implicit activation Create ActivityA From ActivityA, startActivity with ACTION_DIAL intent Create ActivityB Define for ActivityB

32. Homework4: implicit activation Create ActivityA From ActivityA, startActivity with EMAIL_APP(category) intent Create ActivityB Define for ActivityB

33. Homework: Action+Data: Try to put ACTION_CALL instead of ACTION_DIAL Tell me what is difference? Do not forget to add android.permission.CALL_PHONE

34. Questions? Any questions?

35. Thank you Thank you for your attention!