Building a content provider

Question 1

What is the first step in building a content provider?

Answer 1

create a class that extends it

Question 2

What is the first step in building a content provider?

Answer 2

create a class that extends it

Question 3

Who should have an instance of the DBhelper?

Answer 3

Dear COntent provider! Since it should have access to the Data

Question 4

What is the second step? (Registering into?)

Answer 4

Manifest

Question 5

How do we register a content provider to a Manifest?

Answer 5

provider tag, and name and authority and whether we wanna export it?

Question 6

In what cases would I need a content provider?

Answer 6

• You want to offer complex data or files to other applications.
• You want to allow users to copy complex data from your app into other apps.
• You want to provide custom search suggestions using the search framework.
• You want to expose your application data to widgets.
• You want to implement the AbstractThreadedSyncAdapter, CursorAdapter, or CursorLoader classes.

Question 7

Can a content provider save images? ofr files?

Answer 7

Yes, A content provider offers data in two ways:
File data
“Structured” data

Question 8

What is a URI for content provider made of?

Answer 8

SCHEME+Authority+Path

Question 9

What is the fourth step, it’s related to the contract class?

Answer 9

We need to add the defined URI s to the contract class!

Question 10

Who should have an instance of the DBhelper?

Answer 10

Dear COntent provider! Since it should have access to the Data

Question 11

In what cases would I need a content provider?

Answer 11

• You want to offer complex data or files to other applications.
• You want to allow users to copy complex data from your app into other apps.
• You want to provide custom search suggestions using the search framework.
• You want to expose your application data to widgets.
• You want to implement the AbstractThreadedSyncAdapter, CursorAdapter, or CursorLoader classes.

Question 12

Can a content provider save images? ofr files?

Answer 12

Yes, A content provider offers data in two ways:
File data
“Structured” data

Question 13

How do we append a path to a Uri? Let’s call our URI BASE_CONTENT_URI, and the path you wanna append PATH.

Answer 13

BASE_CONTENT_URI.buildUpon().appendPath(PATH_TASKS).build();

So you call BuildUpon and Build before and after Appending path which is wierd!

Question 14

What is the fourth step, it’s related to the contract class?

Answer 14

We need to add the defined URI s to the contract class!

Question 15

What is the UriMatcher for?

Answer 15

To make our code in the content provider cleaner! So that when the content provider should check the URIs to see where exactly should it to the operation, it doesn’t have to do it with if statements.

Question 16

So how do we add a URI matcher?

Answer 16

We add an instance of it, then we make a static builder function for it. In the function, we add the URIs and a matching integer for each of them!

Question 17

How do we use a URI matcher?

Answer 17

int matchInt = uriMatcher.match(uri)

SwitchCase on MatchInt with our own defined constants

Question 18

what do we do if we couldn’t do the operation with URI?

Answer 18

throw new android.database.SQLException(“Failed to insert row into “ + uri);

Question 19

What do we do if the URI isn’t matched?

Answer 19

throw new UnsupportedOperationException(“Unknown uri: “ + uri);

Question 20

What does inset method return?

Answer 20

a “long”, which is the id of the row inserted

Question 21

When we are inserting new data in the content provider, we should let the ____ know about it!

Answer 21

ContentResolver

Question 22

how do we call the insert method of the content provider?

Answer 22

We don’t call it on content provider, we always call it on content resolver:
insert(Contract.Entry.CONTENT_URI, contentValues);

Question 23

How do we make a contentValue?

Answer 23

ContentValues contentValues = new ContentValues();
        contentValues.put(Contract.Entry.COLUMN_NAME, contentValueForThatColumn);

Question 24

How do I build a Uri Matcher?

Answer 24

you make a function! and return it. but you need to add the Uris to the matcher before returning it!