Download E-books Pro Android Media: Developing Graphics, Music, Video, and Rich Media Apps for Smartphones and Tablets PDF

By Shawn Van Every

Cellular units have evolved to concentration on rich media creation and intake. builders of cellular purposes may be able to create purposes that permit humans to play, trap, and share media in quite a few new methods on cellular units. the recognition of Android has soared partially as the platform deals builders a wealthy set of functions together with entry to media shooting and playback functions.   

Pro Android Media provides concise and transparent guideline on tips to make the most of the media APIs made to be had via Android to create dynamic apps. It takes you from an easy capacity to achieve entry to the digicam to complicated video trap and sharing examples. It additionally covers sound, portraits, portray, and more―everything you want to make your app come "alive."

After examining this e-book, the app you create will showcase the easiest of multimedia that Android has to offer.

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Read or Download Pro Android Media: Developing Graphics, Music, Video, and Rich Media Apps for Smartphones and Tablets PDF

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Drawing on an current picture Saving a Bitmap-Based Canvas Drawing What sturdy would it not be to simply draw on a picture with out with the ability to reserve it after the person has created a masterpiece? to date we now have simply drawn images—let’s examine how we will be able to devote those great drawings to permanence. good, a minimum of let’s examine how we will be able to store them to the SD card. Unsurprisingly, it will likely be an identical strategy to what we utilized in the second one bankruptcy to avoid wasting photos captured from our customized digital camera program. Let’s cross over the adjustments that we will be able to make to our ChoosePictureDraw instance to avoid wasting the photographs. to begin with, we’ll have to upload the next imports. import import import import import java. io. OutputStream; android. content material. ContentValues; android. snap shots. Bitmap. CompressFormat; android. supplier. MediaStore. photos. Media; android. widget. Toast; Then within the onCreate strategy, we’ll get a connection with a brand new Button that we'll upload to the format XML and claim in our task. We’ll claim the savePicture button besides the remainder of the example variables correct after the category definition. one hundred and one 102 bankruptcy four: portraits and contact occasions Button savePicture; within the onCreate after acquiring a connection with the choosePicture button we’ll receive a connection with the savePicture button: savePicture = (Button) this. findViewById(R. identification. SavePictureButton); Following that, we’ll set its onClickListener to be our task, an analogous factor we're doing with the choosePicture Button. savePicture. setOnClickListener(this); Now we’ll have to adjust our onClick approach to keep in mind that varied Buttons may be utilizing it. one of the best ways is to check the View that's handed in with the Buttons. If the View is the same as one of many Buttons, that’s the person who used to be clicked. public void onClick(View v) { if (v == choosePicture) { cause choosePictureIntent = new Intent(Intent. ACTION_PICK, android. supplier. MediaStore. pictures. Media. EXTERNAL_CONTENT_URI); startActivityForResult(choosePictureIntent, 0); } else if (v == savePicture) { we all know the savePicture button used to be clicked. Now we have to ensure the Bitmap we're drawing on has been outlined. if (alteredBitmap ! = null) { after we do this, we’re ready to move approximately saving it. similar to prior examples, we’ll question the MediaStore to get a Uri for our new snapshot and create an OutputStream from that Uri. Uri imageFileUri = getContentResolver(). insert( Media. EXTERNAL_CONTENT_URI, new ContentValues()); attempt { OutputStream imageFileOS = getContentResolver(). openOutputStream(imageFileUri); In past photo saving examples, we really already had the information in JPEG shape, and we might easily write it out to the OutputStream. consequently, we need to use the compress approach to the Bitmap item to transform it right into a JPEG (or PNG if we choose). The compress strategy compresses the Bitmap facts and writes it out to an OutputStream for us. It takes in a relentless outlined in Bitmap. CompressFormat, that is both PNG or JPEG. PNG is excellent for line artwork and images.

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