Professional Android 4 Application Development

662 x CHAPTER 15 AUDIO, VIDEO, AND USING THE CAMERA
More than 25 effects are currently supported. The full list — including the parameters they
support — is available at http://developer.android.com/reference/android/media/effect/
EffectFactory.html.
After configuring the effect you want to apply, use its apply method, passing in the input texture, its
dimensions, and the target texture to apply it.
ADDING MEDIA TO THE MEDIA STORE
By default, media files created by your application that are stored in private application folders will
be unavailable to other applications. To make them visible, you need to insert them into the Media
Store. Android provides two options for this. The preferred approach is to use the Media Scanner
to interpret your file and insert it automatically. Or you can manually insert a new record in the
appropriate Content Provider. Using the Media Scanner is almost always the better approach.
Inserting Media Using the Media Scanner
If you have recorded new media of any kind, the MediaScannerConnection class provides the
scanFile method as a simple way for you to add it to the Media Store without needing to construct
the full record for the Media Store Content Provider.
Before you can use the scanFile method to initiate a content scan on your file, you must call
connect and wait for the connection to the Media Scanner to complete. This call is asynchronous,
so you will need to implement a MediaScannerConnectionClient to notify you when the connection
has been made. You can use this same class to notify you when the scan is complete, at which
point you can disconnect your Media Scanner Connection.
This sounds more complex than it is. Listing 15-34 shows the skeleton code for creating a new
MediaScannerConnectionClient that defines a MediaScannerConnection, which is used to add a
new file to the Media Store.
LISTING 15-34: Adding files to the Media Store using the Media Scanner
private void mediaScan(final String filePath) {
MediaScannerConnectionClient mediaScannerClient = new
MediaScannerConnectionClient() {
private MediaScannerConnection msc = null;
{
}
msc = new MediaScannerConnection(
VideoCameraActivity.this, this);
msc.connect();
public void onMediaScannerConnected() {
// Optionally specify a MIME Type, or
// have the Media Scanner imply one based
// on the filename.