Android University - Week 5

Transcript

1. Android University Week 5: Instagram with Parse
2. Instagram
3. Instagram - User can create a new account - User can log in / out - User can create a post with a photo and caption
5. Instagram… with Parse!
6. Why Do We Need Parse?
7. Why Do We Need Parse? We’ve been utilizing data from other developers (MovieDB, Twitter) Twitter
8. Why Do We Need Parse? We’ve been utilizing data from other developers (MovieDB, Twitter) Wouldn’t it be cool if we started using our own data? OUR DATA!
9. Why Do We Need Parse? We’ve been utilizing data from other developers (MovieDB, Twitter) Wouldn’t it be cool if we started using our own data? Parse allows us to get a backend up and running really fast OUR DATA!
10. In the next video… We’ll take a closer look at how we’ll be utilizing Parse
11. Using Parse
15. Instagram… with Parse! - User can create a new account - User can log in / out - User can create a post with a photo and caption
16. // Create the ParseUser ParseUser user = new ParseUser(); // Set core properties user.setUsername("bob"); user.setPassword("bobspassword"); user.signUpInBackground(new SignUpCallback() { public void done(ParseException e) { if (e == null) { // Hooray! Let them use the app now. } else { e.getCode(); e.printStackTrace(); // Sign up didn't succeed. Look at the ParseException // to figure out what went wrong } } });
17. // Create the ParseUser ParseUser user = new ParseUser(); // Set core properties user.setUsername("bob"); user.setPassword("bobspassword"); user.signUpInBackground(new SignUpCallback() { public void done(ParseException e) { if (e == null) { // Hooray! Let them use the app now. } else { e.getCode(); e.printStackTrace(); // Sign up didn't succeed. Look at the ParseException // to figure out what went wrong } } });
18. // Create the ParseUser ParseUser user = new ParseUser(); // Set core properties user.setUsername("bob"); user.setPassword("bobspassword"); user.signUpInBackground(new SignUpCallback() { public void done(ParseException e) { if (e == null) { // Hooray! Let them use the app now. } else { e.getCode(); e.printStackTrace(); // Sign up didn't succeed. Look at the ParseException // to figure out what went wrong } } });
19. // login user with username and password ParseUser.logInInBackground("bob", "bobspassword", new LogInCallback() { public void done(ParseUser user, ParseException e) { if (user != null) { // Hooray! The user is logged in. } else { // Signup failed. Look at the ParseException to see what happened. } } });
20. // login user with username and password ParseUser.logInInBackground("bob", "bobspassword", new LogInCallback() { public void done(ParseUser user, ParseException e) { if (user != null) { // Hooray! The user is logged in. } else { // Signup failed. Look at the ParseException to see what happened. } } });
24. @ParseClassName("Post") public class Post extends ParseObject { public Post() { super(); } // Constructor with core properties public Post(String description) { super(); setDescription(description); } public String getDescription() { return getString("description"); } // Use put to modify field values public void setDescription(String value) { put("description", value); } }
25. @ParseClassName("Post") public class Post extends ParseObject { public Post() { super(); } // Constructor with core properties public Post(String description) { super(); setDescription(description); } public String getDescription() { return getString("description"); } // Use put to modify field values public void setDescription(String value) { put("description", value); } }
26. @ParseClassName("Post") public class Post extends ParseObject { public Post() { super(); } // Constructor with core properties public Post(String description) { super(); setDescription(description); } public String getDescription() { return getString("description"); } // Use put to modify field values public void setDescription(String value) { put("description", value); } }
27. @ParseClassName("Post") public class Post extends ParseObject { public Post() { super(); } // Constructor with core properties public Post(String description) { super(); setDescription(description); } public String getDescription() { return getString("description"); } // Use put to modify field values public void setDescription(String value) { put("description", value); } }
28. Post post = new Post(); post.setDescription("It's laundry day"); // save the data asynchronously post.saveInBackground(new SaveCallback() { @Override public void done(ParseException e) { if (e == null) { // the post was saved and uploaded to parse successfully! } else { // the post did not save successfully for some reason e.getCode(); } } });
29. Post post = new Post(); post.setDescription("It's laundry day"); // save the data asynchronously post.saveInBackground(new SaveCallback() { @Override public void done(ParseException e) { if (e == null) { // the post was saved and uploaded to parse successfully! } else { // the post did not save successfully for some reason e.getCode(); } } });
30. Post post = new Post(); post.setDescription("It's laundry day"); // save the data asynchronously post.saveInBackground(new SaveCallback() { @Override public void done(ParseException e) { if (e == null) { // the post was saved and uploaded to parse successfully! } else { // the post did not save successfully for some reason e.getCode(); } } });
31. In the next video.. • We’ll take a look at how to let users create posts with images
32. Taking a Picture and Saving it
33. Taking a Picture and Saving it Open Camera App Save the picture the user took Send the ‘post’ to our Parse server
34. Taking a Picture and Saving it Open Camera App Save the picture the user took Send the ‘post’ to our Parse server
35. Intents An Intent is Android’s way of saying it has an ‘intent’ to do something Android apps use these Intent objects to specify what it wants to happen (ie : start a new Activity)
36. So far we’ve been utilizing explicit intents because we know exactly what we want to happen (for example: start a new Activity) Intents
37. So far we’ve been utilizing explicit intents because we know exactly what we want to happen (for example: start a new Activity) Now we want to utilize implicit intents to let the user take a picture Intents
38. So far we’ve been utilizing explicit intents because we know exactly what we want to happen (for example: start a new Activity) Now we want to utilize implicit intents to let the user take a picture
 - let’s Android search for all apps that are registered for the action we want to take Intents
39. public void onLaunchCamera(View view) { // create Intent to take a picture and return to our app Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // pass in location where we want the image to be saved intent.putExtra(MediaStore.EXTRA_OUTPUT, uriToSaveImage); // Start the image capture intent to take photo startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE); }
40. public void onLaunchCamera(View view) { // create Intent to take a picture and return to our app Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // pass in location where we want the image to be saved intent.putExtra(MediaStore.EXTRA_OUTPUT, uriToSaveImage); // Start the image capture intent to take photo startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE); }
41. public void onLaunchCamera(View view) { // create Intent to take a picture and return to our app Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // pass in location where we want the image to be saved intent.putExtra(MediaStore.EXTRA_OUTPUT, uriToSaveImage); // Start the image capture intent to take photo startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE); }
42. public void onLaunchCamera(View view) { // create Intent to take a picture and return to our app Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // pass in location where we want the image to be saved intent.putExtra(MediaStore.EXTRA_OUTPUT, uriToSaveImage); // Start the image capture intent to take photo startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE); }
43. public void onLaunchCamera(View view) { // create Intent to take a picture and return to our app Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // pass in location where we want the image to be saved intent.putExtra(MediaStore.EXTRA_OUTPUT, uriToSaveImage); // Start the image capture intent to take photo startActivityForResult(intent, CAPTURE_IMAGE_ACTIVITY_REQUEST_CODE); }