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Seeing It in Action
4:07In this video we'll finish setting up our ContentProvider and finally see it in action!
We just finished getting our cursor, and
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now that we've got it let's loop through
it and add each contact to our list.
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But first we'll need to make sure that
our cursor both exists and isn't empty.
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So let's type if (cursor != to
null to make sure it exists,
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and then add && cursor.moveToFirst
to make sure there is a first row.
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MoveToFirst returns false if there
is not a first row to move to.
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Inside the if statement we can use the do
while loop to loop through our cursor.
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So do and then brackets.
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And we'll leave the inside blank for
now and at the end add
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while(cursor.moveToNext.
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And add a semicolon.
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This way, as long as there's
another row we'll keep looping.
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Inside the loop, we just need to get
the ID and name of our contact and
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then use that to create a new
text view for a linear layout.
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Let's create a new string
variable named id and
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set it equal to cursor.getString.
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And then for the column index,
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let's pass in Cursor.getColumnIndex.
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And then that requires the column name, so
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let's pass in DatabaseHelper.COLUMN_ID and
there we go.
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And now that we've got our ID,
let's use command or
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control D to duplicate this line.
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And then let's just change
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id to name and ID to NAME.
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Then let's create a new TextView.
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TextView textView = getNewTextView, and
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parse in id and name, and
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then let's add that text
view to our linear layout.
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Linear Layout.addView textView.
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And finally after the loop we need to
close our cursor, cursor.close and
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that's it, we're now using a content
provider to serve up our data.
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But before we run the app,
there's one more thing we should do.
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Over in the manifest, we need to declare
our provider inside the application tags.
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Let's add a couple lines at the bottom.
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And then, add a provider tag and
let it auto complete.
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Next, for the authorities, let's pass
in our authority, which remember,
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is just the package name, plus provider.
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So for me it's going to be
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com.teamtreehouse.contentproviders.provi-
der.
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And for the name,
let's give it our content provider.
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Then let's close our provider tag and
run the app.
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Looks good so far.
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Now let's see what happens when we type in
a name like Stan and then hit the button.
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Sweet.
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It added the name to the list and we got a
toast of the URI where the name is stored.
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Let's add another name to get
a better look at that URI.
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Let's type Maddy and
then click the button.
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And we've got the URI of the new row as
the content URI plus the ID of the row.
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Awesome our content provider is
all set up, and it works great.
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But, so
far it's only being used by one app, so
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we're not getting much benefit
from our content provider.
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In the next video we'll
create another app and
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see how we can access our content
provider from the outside.
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