Custom Broadcast Intents and Receivers

Custom broadcast intents and 0:00 receivers work the exact same way as the local broadcast we just created. 0:02 The only thing that's different from a system broadcast, 0:06 is that the custom components both utilize a shared common action. 0:08 Let's take a look in detail activity. 0:13 We already saw how to do this with our song example for intent filters. 0:15 We could very easily switch this to a broadcast intent and 0:19 receiver by getting rid of the chooser and 0:21 sending the intent by the send broadcast method versus the start activity method. 0:24 Let's try it out. 0:29 Let's delete these two lines and then call send broadcast with our custom intent. 0:29 Now we need to open our custom filter project again. 0:37 I've closed mine so I will select Open, Recent, Custom Intent Tester. 0:40 The first thing we need is a new custom broadcast receiver so 0:49 I'm going to expand into the package, and right click and say new Java class, and 0:54 name it song receiver, hit OK, and we want to extend the broadcast receiver class, 1:00 and we want to implement the methods for on receiver, we want to use this 1:06 same intent being passed in, to open main activity, has all the data we want. 1:11 But we can't do it the normal way. 1:17 It's an existing implicit intent so 1:19 we need to convert it into an explicit intent. 1:21 Fortunately it's pretty easy to do. 1:24 First we need to use intent.setClass and this is how we make it explicit. 1:26 You pass in the context and then we name the class which is MainActivity.class. 1:31 Next, we need to flag this as a new task. 1:38 So type intent.set flags. 1:41 And then we pass in an intent flag. 1:44 Intent.flag activity, new task. 1:45 This is a special flag we need to set when starting a new activity. 1:52 This is normally hidden from us when we construct an explicit intent and 1:55 start it with start activity. 1:58 Finally, we can call the start activity. 2:00 But we need the context, 2:02 context.startActivity and we pass in our intent. 2:04 Back in the manifest we need to add a new manifest receiver 2:10 that uses the same intent filter as we already have in main activity So 2:15 I'm going to copy the SHARE SONG intent filter. 2:19 Then here before the end of the application tag, 2:23 I'm going to add a receiver. 2:25 The name is the new class we just added, Song Receiver, which it detected. 2:27 And inside we can put that intent filter. 2:32 All right, with this routing in place we should now be able to display 2:36 song information once again. 2:39 Let's try it out. 2:40 Okay once the app starts, let's close out of it and 2:45 we'll go into MusicMachine and we can share a song. 2:50 I'll share the Underdog by Spoon and then from the detail, select Share song. 2:56 And it goes automatically to Custom Intent Tester. 3:04 Cool. It's working. 3:06 Nice work once again. 3:09 There's one more thing I'd like to show you and that's how to create and 3:10 use notifications to communicate with users asynchronously 3:13 via the notification drawer. 3:16 It's pretty common and at this point pretty easy. 3:18 So take a short break and then let's get to it 3:21