1

00:00:00,150 --> 00:00:08,070

High students in this Tauriel I want to talk about a l Android interface language definition.



2

00:00:08,340 --> 00:00:16,440

So now let's create a new Android studio project and for the application name just hit app 1:53 dash



3

00:00:16,750 --> 00:00:18,390

a.



4

00:00:18,990 --> 00:00:24,870

So you can specify the company domain package name and the project location and then click on next and



5

00:00:24,870 --> 00:00:30,000

here choose a 16 Android 4.1 jelly bean and it connects.



6

00:00:30,360 --> 00:00:32,850

And here too is empty activity next.



7

00:00:33,120 --> 00:00:36,220

And here you don't have to change anything.



8

00:00:36,270 --> 00:00:37,720

And then click on finish.



9

00:00:37,740 --> 00:00:45,000

So now that our project is actually created Let's go to let's first design the user interface of our



10

00:00:45,000 --> 00:00:51,300

application so called Inside this race that lay out and then double double click on this activity underline



11

00:00:51,460 --> 00:00:52,290

that example.



12

00:00:52,530 --> 00:01:01,080

So here let's delete this hello world takes you here and now let's actually tried to a text field inside



13

00:01:01,160 --> 00:01:02,390

this layout.



14

00:01:02,430 --> 00:01:09,480

So at the bottom first click click on this text tab and change this relatively out to linearly out.



15

00:01:09,750 --> 00:01:15,210

And now let's specify the orientation of this layout orientation vertical.



16

00:01:15,210 --> 00:01:16,670

So let's go to design tap.



17

00:01:16,850 --> 00:01:19,110

And now let's drag two text fields.



18

00:01:19,110 --> 00:01:22,210

So it's 36 minutes for the just selected number.



19

00:01:22,230 --> 00:01:22,600

Right.



20

00:01:22,620 --> 00:01:23,470

Right.



21

00:01:23,470 --> 00:01:27,310

Select this one and just drag it into this linearly arithmetic.



22

00:01:27,630 --> 00:01:29,680

Let's actually try another text with.



23

00:01:29,700 --> 00:01:33,080

So again select this number and just track it here.



24

00:01:33,420 --> 00:01:36,470

So now we have to edit this here right to takes fields.



25

00:01:36,690 --> 00:01:41,930

So just select this one the first one and let's specify the ID sort for the ID just type in here it



26

00:01:41,930 --> 00:01:50,610

is the first number and the person tells you on your keyboard and for the set this second detects you



27

00:01:50,650 --> 00:01:53,130

are selected and for the idea just type in here.



28

00:01:53,130 --> 00:01:53,850

EDT.



29

00:01:53,850 --> 00:01:59,100

Second number right and that person enter key on your keyboard.



30

00:01:59,400 --> 00:02:04,920

So now let's actually track a button into these lay out.



31

00:02:04,920 --> 00:02:06,610

So inside this we just fall there.



32

00:02:06,690 --> 00:02:07,760

Select the spot.



33

00:02:07,920 --> 00:02:10,370

And just like it here and put it here below.



34

00:02:10,430 --> 00:02:19,360

It takes here and just select this button and for the idea of say in here Betty Betty and multiply Pythian



35

00:02:19,410 --> 00:02:26,420

multiply and then person until you are on your keyboard and for the text to say in here let's select



36

00:02:26,420 --> 00:02:34,620

the text attribute and just type in here or multiply multiply and that person an interview on your keyboard.



37

00:02:35,000 --> 00:02:39,640

So now let's actually just write a text view.



38

00:02:39,750 --> 00:02:46,630

So just select it takes you here and put it here below the Spartan and select takes.



39

00:02:46,670 --> 00:02:57,380

And for the idea to step in here takes the multiply result takes the multiply result and then person



40

00:02:57,410 --> 00:03:03,770

enter on your keyboard and just delete this value for the text attribute of this text.



41

00:03:04,130 --> 00:03:08,050

So now are we actually designed the user interface or application.



42

00:03:08,060 --> 00:03:11,160

So now I want to talk about a idea.



43

00:03:11,330 --> 00:03:14,830

So first let's see how we can actually create a idealy an android.



44

00:03:14,990 --> 00:03:19,140

So just select this app folder there so make sure that you are inside the Android view.



45

00:03:19,190 --> 00:03:19,730

Right.



46

00:03:19,790 --> 00:03:26,390

So if you just click on these two little triangles here make sure that you have selected Android and



47

00:03:26,390 --> 00:03:33,920

select this app folder at the top click on find new and in just here you can see this idea right.



48

00:03:33,920 --> 00:03:40,490

So just click on a IDL file and here you can actually specify the interface name.



49

00:03:40,550 --> 00:03:48,790

So for the interface name we can say for example here the default name is my up are it a the interface.



50

00:03:48,800 --> 00:03:49,880

I think it's good.



51

00:03:49,880 --> 00:03:57,110

This is actually an interface and other classes can implement this interface can't conform to this interface



52

00:03:57,440 --> 00:04:02,260

so that they can actually use the functionalities of this interface.



53

00:04:02,450 --> 00:04:04,050

So let's just name it.



54

00:04:04,340 --> 00:04:12,230

Multiply multiply interface aren't the target source is me.



55

00:04:12,310 --> 00:04:14,560

So just click on finish.



56

00:04:14,700 --> 00:04:20,820

So now as you can see inside this app folder we have another folder called IDL.



57

00:04:20,940 --> 00:04:24,060

And inside this folder we have our package right.



58

00:04:24,060 --> 00:04:29,770

And inside this package we have this wide multiplayer interface that IDL.



59

00:04:29,930 --> 00:04:36,150

So look at this comment here it says demonstrates some basic types that you can use as parameters and



60

00:04:36,150 --> 00:04:39,050

return values in IDL right.



61

00:04:39,360 --> 00:04:43,800

So here you can see these totals as you can see it's essentially a Meffert basic types.



62

00:04:43,800 --> 00:04:48,460

These are the types in integer Lanc boolean float double and string.



63

00:04:48,660 --> 00:04:52,130

So let's actually delete this comment and this method here.



64

00:04:52,230 --> 00:04:58,970

So here as you can see we have an interface right interface multiplayer interface right.



65

00:04:59,040 --> 00:05:07,380

So let me tell you that the end is used for actually creating a relationship between the client and



66

00:05:07,380 --> 00:05:08,850

the remote server.



67

00:05:08,850 --> 00:05:09,310

Right.



68

00:05:09,330 --> 00:05:15,570

So for example the main activity is the client and the server is going to be of the class that is actually



69

00:05:15,570 --> 00:05:17,790

playing the role of a server service.



70

00:05:17,790 --> 00:05:21,920

Let me show you an example here and then it will completely make sense right.



71

00:05:22,050 --> 00:05:29,340

By showing you by creating a real application you cannot actually understand what is ideal used for.



72

00:05:29,340 --> 00:05:34,770

So now inside this interface inside the curly braces of this interface let's write some code.



73

00:05:34,950 --> 00:05:41,610

So now as the name of our interface suggests this is going to be an interface for multiplying values.



74

00:05:41,610 --> 00:05:42,170

Right.



75

00:05:42,390 --> 00:05:49,820

So here I am going to declare a method for that is anybody going to use for multiplying values.



76

00:05:49,830 --> 00:05:52,350

So here I can see it.



77

00:05:52,410 --> 00:05:55,530

So this is going to be the return type of of my method right.



78

00:05:55,680 --> 00:06:08,160

And here I can say multiply multiply two values two values together and then here I can just put a pair



79

00:06:08,160 --> 00:06:13,160

of parenthesis so this method is going to accept some parameters to make parameters actually.



80

00:06:13,170 --> 00:06:16,060

So the first parameter is going to be of type integer.



81

00:06:16,060 --> 00:06:21,440

So int and here I can say first number comma.



82

00:06:21,860 --> 00:06:30,020

And so this is going to be the second parameter second number and because this is actually an interface



83

00:06:30,290 --> 00:06:36,740

and you are already familiar with interfaces in Java you cannot provide a body for this method.



84

00:06:36,740 --> 00:06:39,170

This is going to be a declaration of this method.



85

00:06:39,200 --> 00:06:45,080

So if you just need to put a semicolon at the end at the end of our statement here right we just declared



86

00:06:45,140 --> 00:06:49,330

this method we do not provide implementation here inside this interface.



87

00:06:49,350 --> 00:06:56,350

So now let's actually create a service so at the top just click on file first.



88

00:06:56,480 --> 00:06:58,120

Let's go to view here.



89

00:06:58,130 --> 00:07:03,380

So at the top just click on a view and then open windows and then click on Project.



90

00:07:03,380 --> 00:07:04,120

Right.



91

00:07:04,340 --> 00:07:12,020

And now we want to actually create a service that implements this interface that implements this IDL



92

00:07:12,020 --> 00:07:15,220

here and then we can actually use that service.



93

00:07:15,320 --> 00:07:21,350

So let's actually select this top a failure here just open it and then select this package and at the



94

00:07:21,350 --> 00:07:26,740

top just click on find new and then click on the service to select a service here.



95

00:07:26,750 --> 00:07:28,130

So this is the service right.



96

00:07:28,130 --> 00:07:29,810

And then here we have two options.



97

00:07:29,810 --> 00:07:33,350

Service and the second one is service intent service.



98

00:07:33,500 --> 00:07:37,690

So select this one service here and for the class name.



99

00:07:37,780 --> 00:07:38,950

This is going to be a class.



100

00:07:38,960 --> 00:07:39,600

Right.



101

00:07:39,620 --> 00:07:46,340

So here I can say multiplication multi placation series.



102

00:07:46,640 --> 00:07:48,930

So this is the name on what the name of my service.



103

00:07:48,950 --> 00:07:49,410

Right.



104

00:07:49,640 --> 00:07:51,260

And then click can finish.



105

00:07:51,770 --> 00:07:56,950

So now we have a new class and the name of this class is multiplication service.



106

00:07:56,960 --> 00:07:57,590

Right.



107

00:07:57,890 --> 00:08:04,070

So you can see that this is a public class and this class extends the service class.



108

00:08:04,070 --> 00:08:10,640

So in the inside this class we have this empty constructor that is actually already provided for us



109

00:08:10,880 --> 00:08:11,880

by Android.



110

00:08:12,290 --> 00:08:14,930

And we have this method that is overrated here.



111

00:08:14,930 --> 00:08:21,050

And as you can see some of this if it is actually an bind that returns a value of type A binder.



112

00:08:21,140 --> 00:08:21,710

Right.



113

00:08:22,040 --> 00:08:24,190

So now let's see how we can use the Smiff.



114

00:08:24,200 --> 00:08:25,120

So look at this comment.



115

00:08:25,120 --> 00:08:29,700

It says Return the communication channel to the service.



116

00:08:29,780 --> 00:08:30,340

Right.



117

00:08:30,470 --> 00:08:34,720

So now let's just double click on this tab here.



118

00:08:34,850 --> 00:08:36,230

This multiplication.



119

00:08:36,230 --> 00:08:38,690

So we start over top in order to make this area there.



120

00:08:38,870 --> 00:08:45,200

First let's actually delete these two lines of code here and now I mean I dismiss it right.



121

00:08:45,200 --> 00:08:49,380

First of all Vin Weber that you actually create an ideal file.



122

00:08:49,530 --> 00:08:54,090

So now let me show you that file here view tool windows and then project.



123

00:08:54,110 --> 00:09:00,860

So inside our project we have this idea file right with the extension dot a IDL white men over it that



124

00:09:00,860 --> 00:09:05,480

you create a file that is actually has the extension a IDL.



125

00:09:05,630 --> 00:09:09,070

You must actually build your project.



126

00:09:09,200 --> 00:09:12,560

So at the top click on build and here you have two options.



127

00:09:12,560 --> 00:09:14,670

Clean project and rebuild project.



128

00:09:14,690 --> 00:09:18,890

So when you choose the rebuild project it's going to first clean your project and then it's going to



129

00:09:18,890 --> 00:09:19,800

build your project.



130

00:09:19,910 --> 00:09:22,000

So it's better to choose this option.



131

00:09:22,010 --> 00:09:23,030

Rebuild the project.



132

00:09:23,090 --> 00:09:24,290

So just elected.



133

00:09:24,650 --> 00:09:28,030

And as you can see at the bottom it says great deal be threatening.



134

00:09:28,040 --> 00:09:29,880

So let's wait a little bit here.



135

00:09:31,280 --> 00:09:34,030

So now as you can see it's actually running.



136

00:09:34,070 --> 00:09:35,740

So now everything is OK.



137

00:09:35,840 --> 00:09:36,410

Right.



138

00:09:36,680 --> 00:09:39,350

And now my project is to rebuild.



139

00:09:39,470 --> 00:09:42,230

So now let's go inside this method on buying it.



140

00:09:42,270 --> 00:09:45,370

Look at the return type of the Smurfette I'd buy in there.



141

00:09:45,500 --> 00:09:48,550

So here we must through of value of paper.



142

00:09:48,560 --> 00:09:49,530

Are you buying that right.



143

00:09:49,610 --> 00:09:52,190

So here first let's put this statement here.



144

00:09:52,220 --> 00:10:03,710

So just step in here return return my binder semicolon return my binder.



145

00:10:04,280 --> 00:10:06,610

So this is going to be the return value.



146

00:10:06,620 --> 00:10:12,090

But as you can see we have an error and this means that we haven't created this return value.



147

00:10:12,110 --> 00:10:18,080

So now let's actually tap to just publicly tap here in order to make this area wider.



148

00:10:18,440 --> 00:10:23,820

And let's go inside the curly braces of this clap class multiplication.



149

00:10:23,860 --> 00:10:24,190

Right.



150

00:10:24,200 --> 00:10:29,600

So after the end in calibrates of this Meffert unbind and before the end in Crilley place of this class.



151

00:10:29,600 --> 00:10:32,780

So inside this class just typing here.



152

00:10:32,810 --> 00:10:40,800

So the name of our IDL file is actually multiply multiply interface.



153

00:10:40,820 --> 00:10:45,170

So here we want to create an object of type A binder right.



154

00:10:45,170 --> 00:10:51,960

So in order to do that first we first read the name of your ID or find multiplayer interface dot stop.



155

00:10:51,980 --> 00:10:53,580

This is really important stuff.



156

00:10:53,580 --> 00:10:59,740

With capital S and now we can actually name of name or update we can give a name to our object.



157

00:10:59,870 --> 00:11:01,550

So the name is going to be this name right.



158

00:11:01,560 --> 00:11:02,400

My binder.



159

00:11:02,450 --> 00:11:07,820

So here I can say my binder assignment operator.



160

00:11:07,940 --> 00:11:09,700

So now let's create an object.



161

00:11:09,700 --> 00:11:15,130

So here you're actually just creating a variable of type multiplayer interface that stop.



162

00:11:15,260 --> 00:11:15,890

Right.



163

00:11:15,890 --> 00:11:18,420

So now let's create the actual object.



164

00:11:18,420 --> 00:11:23,430

So in order to do that first you need to put the new vote and then you just you just need to put.



165

00:11:23,540 --> 00:11:28,760

You just need to refer to your interface to your ideal file multiplayer interface.



166

00:11:28,880 --> 00:11:35,300

So when you put the capital in here it's actually the auto companies feature of Android studio is going



167

00:11:35,300 --> 00:11:37,340

to help you to choose this option.



168

00:11:37,370 --> 00:11:38,200

Stop right.



169

00:11:38,210 --> 00:11:39,220

Start with chapiter.



170

00:11:39,260 --> 00:11:42,450

And inside the curly braces you can see these dot dot dot.



171

00:11:42,590 --> 00:11:44,610

So select this one and then press not.



172

00:11:44,830 --> 00:11:45,660

On your keyboard.



173

00:11:45,860 --> 00:11:52,630

So now the autocomplete feature of Android would you put these lines of code here for you automatically.



174

00:11:52,640 --> 00:11:57,110

So here we have an error and after the end curly brace here just put a semicolon.



175

00:11:57,140 --> 00:11:58,700

So now the error is gone.



176

00:11:58,700 --> 00:12:03,090

So now here let's create a new line so that you can assume it can actually the whole method here.



177

00:12:03,140 --> 00:12:05,320

You can see the whole method here.



178

00:12:05,330 --> 00:12:08,570

So now we have actually the over write it up.



179

00:12:08,600 --> 00:12:14,840

We have we have a new order right at Mefford and the access modifier of this method is probably the



180

00:12:14,840 --> 00:12:21,890

return type of this if it is integer and the name of the Smurfit is multiply two values together.



181

00:12:21,890 --> 00:12:23,780

So as you can see we have actually a typo.



182

00:12:23,810 --> 00:12:30,650

Let's go to our multiply interface that IDL So as you can see I did I did a mistake and instead of you



183

00:12:30,650 --> 00:12:31,480

I put y.



184

00:12:31,490 --> 00:12:36,560

So let's just delete this Y and put you multiply two values to get that.



185

00:12:36,560 --> 00:12:40,040

So let's go to our series multiplication service.



186

00:12:40,280 --> 00:12:42,670

And now let's actually change this one to you.



187

00:12:42,920 --> 00:12:50,390

So because we actually changed our ID file again we must just build our project so at the tactical we



188

00:12:50,390 --> 00:12:53,570

can build and then selectively build project.



189

00:12:53,570 --> 00:12:58,340

So let's wait a little bit here and now everything is fine.



190

00:12:58,490 --> 00:12:58,850

Right.



191

00:12:58,850 --> 00:13:00,430

We have no errors here.



192

00:13:00,500 --> 00:13:01,730

So here we have this method.



193

00:13:01,730 --> 00:13:05,970

Multiply two values together and this Smif it accepts two arguments.



194

00:13:06,080 --> 00:13:10,450

The first one is that integer first number and the second one is of type integer second number.



195

00:13:10,460 --> 00:13:11,270

Right.



196

00:13:11,390 --> 00:13:14,980

So now as you can see this MF'er the froze an exception.



197

00:13:14,990 --> 00:13:20,750

So if you want to actually use the Smurfette then our main activity want to use the Smurfette we must



198

00:13:20,750 --> 00:13:22,530

actually handle this exception.



199

00:13:22,730 --> 00:13:26,250

So this Meffert by default returns a value of type integer which is zero.



200

00:13:26,330 --> 00:13:28,230

So we don't want this statement here.



201

00:13:28,250 --> 00:13:29,200

Just delete it.



202

00:13:29,360 --> 00:13:34,500

And now as its name suggests multiply two values together and say return.



203

00:13:34,910 --> 00:13:37,920

So now we have this Meffert accepts two prime hitters right.



204

00:13:38,030 --> 00:13:46,110

So I the first the name of this first number first number multiplied by second number.



205

00:13:46,130 --> 00:13:52,080

So now you can see that this service is actually implemented in this interface.



206

00:13:52,080 --> 00:13:54,720

This multiplayer interface that IDL.



207

00:13:54,740 --> 00:13:55,350

Right.



208

00:13:55,370 --> 00:13:58,080

So we created an ideal file here.



209

00:13:58,100 --> 00:14:03,350

And as you can see this is actually just a simple interface right and you are already familiar with



210

00:14:03,350 --> 00:14:04,960

interfaces in Java.



211

00:14:05,240 --> 00:14:11,480

And we created a service which is this one multiplication service and this service is actually implementing



212

00:14:11,630 --> 00:14:18,840

this interface so that we can actually provide an implementation for them for them if at this interface.



213

00:14:19,070 --> 00:14:26,300

So now we have this Meffert here and this certainly as you can see we have actually an over Meffert



214

00:14:26,540 --> 00:14:30,560

and this service needs to return a value of five and a binder right.



215

00:14:30,580 --> 00:14:33,560

So if we just returned this my binder here.



216

00:14:33,650 --> 00:14:36,140

So now let's go to our main activity here.



217

00:14:36,140 --> 00:14:38,510

So this is going to be our client.



218

00:14:38,630 --> 00:14:39,400

Right.



219

00:14:39,470 --> 00:14:45,180

So now we can actually just interact with the remote service.



220

00:14:45,350 --> 00:14:46,100

Right.



221

00:14:46,100 --> 00:14:51,440

So if you have actually an interface and we have a service and we have a client which is the main activity



222

00:14:51,890 --> 00:14:58,430

and the main activity can interact with the remote service by this idea find this multiply into an interface



223

00:14:58,430 --> 00:14:59,620

that idea.



224

00:14:59,860 --> 00:15:08,540

So that's the whole concept of a deal in Android right Android interface language definition.



225

00:15:08,630 --> 00:15:09,090

Right.



226

00:15:09,150 --> 00:15:13,100

A d l and that's the whole concept.



227

00:15:13,310 --> 00:15:15,660

And now you can actually figure out what's going on here.



228

00:15:15,830 --> 00:15:19,670

So let's go to our main activity and let's see how we can use this service.



229

00:15:19,670 --> 00:15:25,550

So first of all let's actually just declared this the objects the user interface components that we



230

00:15:25,550 --> 00:15:26,260

put here.



231

00:15:26,420 --> 00:15:30,580

So we have to edit takes we have a patent and we have a text view.



232

00:15:30,710 --> 00:15:34,710

So let's go to main activity and say this class here.



233

00:15:35,060 --> 00:15:37,170

First I can't say that it works.



234

00:15:37,430 --> 00:15:44,570

So here I can say it is your first number the first number so I can actually declare my two objects



235

00:15:44,750 --> 00:15:45,350

which are of type.



236

00:15:45,360 --> 00:15:46,600

It takes in just one line.



237

00:15:46,640 --> 00:15:51,560

So comma it is the second number.



238

00:15:51,650 --> 00:15:52,990

Right semicolon.



239

00:15:53,210 --> 00:15:57,670

And then if you have actually a patent spot in between.



240

00:15:57,790 --> 00:15:58,440

Multiply



241

00:16:00,950 --> 00:16:06,120

semi-colon and we have a Takes view so it takes you to 60.



242

00:16:06,320 --> 00:16:12,800

Multiply multiply result takes the multiply result semicolon.



243

00:16:12,980 --> 00:16:16,280

So now let's go inside the Smurfette uncreate right.



244

00:16:16,460 --> 00:16:21,070

And now let's initialize these Optix that we actually declared inside our class.



245

00:16:21,080 --> 00:16:25,940

So the first one is a little first number assignment operator and then we need to cast this object on



246

00:16:25,970 --> 00:16:32,500

any text object find view by ID or that Id dot EDT first number semicolon.



247

00:16:32,850 --> 00:16:40,710

Is the second number assignment operator let's cast this object to an end it takes up to act fine.



248

00:16:40,780 --> 00:16:44,910

View by ID or data ID that EDT.



249

00:16:45,080 --> 00:16:47,110

Second number semicolon.



250

00:16:47,630 --> 00:16:52,580

And we have this button in between and multiply so between multiply assignment operator let's cast this



251

00:16:52,610 --> 00:17:00,680

object to our button object find view by ID or that Id that PTEN multiply semi-colon and we have THC



252

00:17:00,680 --> 00:17:01,980

multiplier is that.



253

00:17:02,040 --> 00:17:04,630

So the multiplier is an assignment operator.



254

00:17:04,650 --> 00:17:11,710

There's that cestus object to our text view object find view Id or ID that he likes the multiply.



255

00:17:11,710 --> 00:17:13,460

Who is that right.



256

00:17:13,490 --> 00:17:16,310

So not everything is fine everything is OK.



257

00:17:16,520 --> 00:17:20,560

So now let's see how we can use this service.



258

00:17:20,570 --> 00:17:24,950

So first of all let's create our listener for the spot in the city and multiply.



259

00:17:24,950 --> 00:17:29,470

So whenever the user clicks on the spot in this button something is going to happen.



260

00:17:29,480 --> 00:17:33,710

So here I'm going to actually implement the view that unclick listener interface.



261

00:17:33,710 --> 00:17:43,010

So class main activity extends app compact activity implements you dot unclick listener.



262

00:17:43,040 --> 00:17:45,530

So now here inside is uncreate Smurfette.



263

00:17:45,550 --> 00:17:50,370

Here I can say PTEN or multiply that set unclick listener.



264

00:17:50,630 --> 00:17:56,150

And then here I need to pass the context so the context is an activity that this and then here inside



265

00:17:56,180 --> 00:18:01,930

the class inside this main activity class we must actually provide an implementation for the uncleaned



266

00:18:01,930 --> 00:18:02,510

method.



267

00:18:02,780 --> 00:18:05,990

That is that is inside of this view that unclick listener interface.



268

00:18:05,990 --> 00:18:14,300

So inside this class I can just see unclick and here and click and now the autocomplete feature of Android



269

00:18:14,300 --> 00:18:18,360

studio is helping me to use this method and then person enter on your keyboard.



270

00:18:18,560 --> 00:18:21,630

So now we have the Smurfette here inside this class.



271

00:18:21,710 --> 00:18:25,280

So let's go to our uncreate Smurfette.



272

00:18:25,610 --> 00:18:30,280

And here we have actually a method called Blind service.



273

00:18:30,320 --> 00:18:37,790

So now we may want to ask ourselves what we want to do here if we want to bind this our main activity



274

00:18:37,790 --> 00:18:40,990

this client of this service.



275

00:18:41,090 --> 00:18:43,530

So we want to use this method bind service.



276

00:18:43,550 --> 00:18:44,050

Right.



277

00:18:44,240 --> 00:18:48,890

So let me show you what are the arguments of this method.



278

00:18:48,920 --> 00:18:52,350

The first argument is going to be of type service right.



279

00:18:52,370 --> 00:18:57,220

And as you can see the first one is actually of that intent and the name is service.



280

00:18:57,230 --> 00:18:59,030

So we need to pass the Internet.



281

00:18:59,030 --> 00:19:05,030

And the second argument is this service connection and the third argument is actually Flack's which



282

00:19:05,030 --> 00:19:06,420

is I-5 integer.



283

00:19:06,500 --> 00:19:11,290

So we need to pass these arguments through the Smurfette so that we can use this method.



284

00:19:11,660 --> 00:19:13,100

So let's see how we can do that first.



285

00:19:13,130 --> 00:19:14,340

Let's actually create.



286

00:19:14,550 --> 00:19:16,150

The intent as you can see here.



287

00:19:16,210 --> 00:19:23,360

So before the declaration before use the people calling this method bind service we need to actually



288

00:19:23,360 --> 00:19:24,570

create the intent.



289

00:19:24,710 --> 00:19:26,550

So let's do that here.



290

00:19:26,570 --> 00:19:29,560

So here I can't say intent intent



291

00:19:32,340 --> 00:19:32,880

right.



292

00:19:32,940 --> 00:19:35,640

And that name is going to be months play intense multi



293

00:19:38,640 --> 00:19:42,490

multiply intent assignment operator.



294

00:19:43,110 --> 00:19:49,430

And then when you say we are just creating of value but of intent and the name is multiply intent.



295

00:19:49,560 --> 00:19:52,890

So now we want to create the actual object of intent.



296

00:19:52,890 --> 00:19:53,380

Right.



297

00:19:53,400 --> 00:19:55,200

So here I just put new.



298

00:19:55,470 --> 00:20:02,790

And then I can just say intent and this method should add that the constructor of intent needs two arguments.



299

00:20:02,790 --> 00:20:04,410

First we need to pass the context.



300

00:20:04,410 --> 00:20:11,630

So here I can say main activity that this comma and the second argument is going to be service right.



301

00:20:11,850 --> 00:20:17,820

So if we actually hover over this bind so we see it it says the first argument is actually off that



302

00:20:17,840 --> 00:20:19,660

intent but the name is service.



303

00:20:19,680 --> 00:20:23,120

So we already created this multiplication so we see it right.



304

00:20:23,130 --> 00:20:29,060

So for the second argument I can pass this multiplication service here so I can say multiplication.



305

00:20:29,070 --> 00:20:31,980

So we start a class semicolon.



306

00:20:32,190 --> 00:20:32,730

Right.



307

00:20:32,940 --> 00:20:39,650

So now you know that YV actually create a disservice because we want to bind this may not be with this



308

00:20:39,690 --> 00:20:42,290

client we deserve service right.



309

00:20:42,340 --> 00:20:45,240

And now if we pass this multiplication said was here.



310

00:20:45,390 --> 00:20:48,760

So now we have the first argument multiplied into.



311

00:20:48,780 --> 00:20:55,170

So here I can say multiply intent karma or I can say multiply servies.



312

00:20:55,170 --> 00:20:58,640

It's better to actually put multiply so.



313

00:20:58,650 --> 00:21:05,120

It's more meaningful multiply series.



314

00:21:05,210 --> 00:21:08,660

So let's change this one two months to play service.



315

00:21:08,680 --> 00:21:11,980

So now we need to specify the second argument.



316

00:21:12,040 --> 00:21:15,110

So the second argument is actually a service connection.



317

00:21:15,160 --> 00:21:15,540

Right.



318

00:21:15,670 --> 00:21:20,360

So let's actually create an object of types that service action inside is main activity class.



319

00:21:20,410 --> 00:21:25,600

So after the end curly brace of the Smurfit uncreate an insight is main activity class.



320

00:21:25,610 --> 00:21:29,570

I'm going to create actually an object of service connection here.



321

00:21:29,680 --> 00:21:38,920

So here I can say service connection service connection and the name is going to be my service connection



322

00:21:38,980 --> 00:21:42,390

my service connection.



323

00:21:42,820 --> 00:21:47,330

And then I put an assignment operator here and I put the new keyboard.



324

00:21:48,000 --> 00:21:50,580

And here I want to use it.



325

00:21:50,640 --> 00:21:53,250

I actually want to create an anonymous in a class.



326

00:21:53,260 --> 00:21:57,030

So let me tell you that this service connection is not a class.



327

00:21:57,160 --> 00:21:58,610

This is just an interface.



328

00:21:58,630 --> 00:22:04,070

So let's let me just hold the combination on a keyboard and then click on the service connection here.



329

00:22:04,270 --> 00:22:06,210

As you can see this is not a class.



330

00:22:06,280 --> 00:22:11,570

This is an interface here with this if it's on service connected and answer was disconnected.



331

00:22:11,620 --> 00:22:12,580

Right.



332

00:22:12,630 --> 00:22:15,280

So you want to actually use this interface.



333

00:22:15,290 --> 00:22:23,080

So now here I am going to create an anonymous class that actually conforms to this interface that implements



334

00:22:23,080 --> 00:22:24,150

this interface.



335

00:22:24,160 --> 00:22:30,370

So here I can see new and then I hold the shift key on my keyboard and then I actually present them



336

00:22:30,520 --> 00:22:32,100

as key on my keyboard.



337

00:22:32,110 --> 00:22:38,140

So now it's you can see that the autocomplete of the autocomplete feature of Android studio is helping



338

00:22:38,140 --> 00:22:39,400

me to choose this option.



339

00:22:39,400 --> 00:22:44,320

So misconnection right as you can see you can see these curly braces such as this one and they press



340

00:22:44,320 --> 00:22:45,760

that intellectual keyboard.



341

00:22:46,090 --> 00:22:52,300

So now you can see that the Android studio provided these quotes here for me automatically.



342

00:22:52,330 --> 00:22:57,610

So now we need to put a semicolon at the end of this or calibers year after the ending calibers and



343

00:22:57,610 --> 00:22:59,260

now everything is fine.



344

00:22:59,530 --> 00:23:05,830

So if you have the anonymous in a class that conforms or implements this service connection and if you



345

00:23:05,830 --> 00:23:10,930

have this tumor if it's you're over rated for us we must actually provide an implementation for these



346

00:23:10,930 --> 00:23:13,620

methods because this is an interface.



347

00:23:13,660 --> 00:23:16,260

So now inside this on we can act.



348

00:23:16,290 --> 00:23:18,700

So we want to use the Smurfit on service connected.



349

00:23:18,760 --> 00:23:19,340

Right.



350

00:23:19,600 --> 00:23:21,810

So we need to put a logic.



351

00:23:21,820 --> 00:23:29,150

So now first of all let's create a valuable of type multiplayer interface inside our class.



352

00:23:29,170 --> 00:23:32,820

So let's actually scroll to the top and inside is main activity class here.



353

00:23:33,010 --> 00:23:36,140

I can just create a variable of multiplayer interface.



354

00:23:36,250 --> 00:23:38,660

So here I can say multiply interface.



355

00:23:38,680 --> 00:23:44,960

Let's actually keep this valuable name right so that the data type is multiplayer interface.



356

00:23:45,010 --> 00:23:51,210

And here I can say my interface right my interface semi-colon.



357

00:23:51,520 --> 00:23:53,880

So now let's actually scroll down here.



358

00:23:53,890 --> 00:23:56,660

So here we just declare this valuable right.



359

00:23:56,680 --> 00:23:57,670

My interface.



360

00:23:57,700 --> 00:24:01,730

Now let's scroll down here and let's go inside this on it connected.



361

00:24:02,050 --> 00:24:04,320

And now let's initialize disparity table.



362

00:24:04,340 --> 00:24:07,990

So here I can see my interface assignment operator.



363

00:24:08,020 --> 00:24:10,500

So look at the Smurfette here on service connected.



364

00:24:10,600 --> 00:24:12,910

This it accepts two parameters.



365

00:24:13,000 --> 00:24:17,470

The first one is component's name and the second one is a binder.



366

00:24:17,470 --> 00:24:24,790

So if you want to use this binder here because we want to actually bind this client main activity with



367

00:24:24,790 --> 00:24:27,580

the interface right with this service.



368

00:24:27,580 --> 00:24:30,680

So now let's actually just type in here.



369

00:24:30,820 --> 00:24:37,180

Monte playlets actually refer to the name of this interface multiply interface that ADL.



370

00:24:37,180 --> 00:24:45,970

So here I can say multiplayer interface multiplayer interface that stop here and that here I can say



371

00:24:46,080 --> 00:24:52,560

that as interface and design if it actually needs an argument of type I bind.



372

00:24:52,570 --> 00:24:57,010

So we actually get this a binder from the Smurfit from this on said Can I get my fit.



373

00:24:57,010 --> 00:25:00,020

So here we can pass this binder to the smith.



374

00:25:00,130 --> 00:25:02,950

So here I can say a binder semi-colon.



375

00:25:02,950 --> 00:25:10,000

So by using the service connection we are actually connecting these Servius this multiplication service



376

00:25:10,210 --> 00:25:11,440

to this interface.



377

00:25:11,470 --> 00:25:14,880

We have the second argument of this point service Smurfit.



378

00:25:15,010 --> 00:25:17,940

So the second argument is my service connection.



379

00:25:17,950 --> 00:25:19,490

So we created this one here.



380

00:25:19,600 --> 00:25:20,060

Right.



381

00:25:20,290 --> 00:25:23,670

And we actually provided the first argument.



382

00:25:23,980 --> 00:25:28,860

So the first argument is of type integer and it is actually a flag.



383

00:25:29,080 --> 00:25:33,970

So here I can say so now as you can see I actually saw it.



384

00:25:34,030 --> 00:25:36,720

I mistakenly deleted the name of this value.



385

00:25:36,750 --> 00:25:39,700

So let me actually undo this action.



386

00:25:39,880 --> 00:25:45,480

So I put a name here so now we have my cell connection right so I can put the comma here.



387

00:25:45,700 --> 00:25:48,780

And now you need to specify the first argument.



388

00:25:48,910 --> 00:25:49,420

Right.



389

00:25:49,600 --> 00:25:54,320

And now that the argument is of type integers so it is actually going to be context.



390

00:25:54,430 --> 00:25:56,150

So this is going to be a flag.



391

00:25:56,260 --> 00:25:57,890

So we must put the flag here.



392

00:25:58,000 --> 00:26:07,030

So here I can say context dot and here we actually choose this one bind auto create write bind all to



393

00:26:07,030 --> 00:26:07,590

create.



394

00:26:07,600 --> 00:26:10,100

This is really important this is the flag that we use.



395

00:26:10,210 --> 00:26:13,970

So its going to bind this service with that interface.



396

00:26:14,620 --> 00:26:17,420

So just put a semicolon at the end of your statement.



397

00:26:17,560 --> 00:26:18,640

Right.



398

00:26:18,640 --> 00:26:22,350

So now we have this spine was here for us.



399

00:26:22,420 --> 00:26:27,060

So its going to do the job for us and we pass these arguments multiply service.



400

00:26:27,070 --> 00:26:28,210

So this is the intent.



401

00:26:28,540 --> 00:26:35,410

And then we have the service connection and then actually the past display context that bind auto create.



402

00:26:35,410 --> 00:26:39,130

So now the binding is actually implemented here.



403

00:26:39,340 --> 00:26:42,720

So let's go to these uncreate method here.



404

00:26:42,720 --> 00:26:47,340

So first of all let's actually just as you can see we have these Eadie takes here.



405

00:26:47,340 --> 00:26:47,700

Right.



406

00:26:47,820 --> 00:26:52,950

So if you want to get the value of this as it takes and this one and then if you want to multiply these



407

00:26:52,950 --> 00:26:53,810

two values together.



408

00:26:53,850 --> 00:27:00,030

And then when the user clicks on this button the result is going to be shown here on this TXI the multiplayer



409

00:27:00,030 --> 00:27:00,820

is out.



410

00:27:00,840 --> 00:27:03,050

So let's go to the street uncreate Mefford.



411

00:27:03,270 --> 00:27:07,050

And here I can create a variable of type integer and the name of this value.



412

00:27:07,070 --> 00:27:15,000

But it's going to be first number first number and then I put an assignment operator here and in here



413

00:27:15,030 --> 00:27:23,710

I can say it is the first number that get fixed that two is three semicolon.



414

00:27:24,090 --> 00:27:27,900

So now as you can see we have an error and because this is actually the end it is invaluable.



415

00:27:27,900 --> 00:27:34,170

Here we are getting a string value so if you want to cast this value you want to just convert actually



416

00:27:34,410 --> 00:27:35,730

this value to an integer value.



417

00:27:35,730 --> 00:27:38,080

So we use the method of the integer class.



418

00:27:38,130 --> 00:27:39,530

So integer parsing.



419

00:27:39,540 --> 00:27:43,920

So you are already familiar with this method and this method accepts an argument of type stream and



420

00:27:43,920 --> 00:27:47,920

it's going to convert this value to an integer value here.



421

00:27:47,940 --> 00:27:51,160

So we actually put this value inside the pantless.



422

00:27:51,390 --> 00:27:57,180

So is the practices of this parsing Smurfit and now the error is gone let's create another rowdier but.



423

00:27:57,390 --> 00:28:01,580

Second number assignment operator.



424

00:28:01,650 --> 00:28:11,050

So integer parsing it has a number that takes that string semicolon.



425

00:28:11,340 --> 00:28:14,410

So now let's create another variable.



426

00:28:14,430 --> 00:28:16,730

The end result.



427

00:28:17,220 --> 00:28:18,030

Assignment operator.



428

00:28:18,040 --> 00:28:19,630

So let me scroll to the top here.



429

00:28:19,740 --> 00:28:25,560

You can see this interface at my interface so we can't actually access the method that we have inside



430

00:28:25,560 --> 00:28:26,750

this IDL file.



431

00:28:26,880 --> 00:28:31,820

This one and we actually provided an implementation for this method inside the service.



432

00:28:32,010 --> 00:28:37,410

So inside this main activity class and inside is Uncle Mefford we actually binded this service with



433

00:28:37,410 --> 00:28:38,800

this client here.



434

00:28:38,940 --> 00:28:44,400

So we created a connection between these services as you can see we provided this my service connection



435

00:28:44,400 --> 00:28:44,890

here right.



436

00:28:44,970 --> 00:28:48,520

So it's going to create a connection between the service and this idea right.



437

00:28:48,720 --> 00:28:53,090

And now these service is my interface it is now initialized.



438

00:28:53,100 --> 00:28:53,850

Right.



439

00:28:54,300 --> 00:28:59,720

So we declared disvalue but my interface and be initialized this rally about here inside this on service



440

00:28:59,720 --> 00:29:00,550

connected.



441

00:29:00,810 --> 00:29:01,430

Right.



442

00:29:01,500 --> 00:29:04,740

So now we have this interface here.



443

00:29:04,740 --> 00:29:05,990

So it's resolved.



444

00:29:06,020 --> 00:29:13,980

Assignment operator and here I can refer to this my interface and now I can see that multiply two values



445

00:29:13,980 --> 00:29:15,230

to get there.



446

00:29:15,240 --> 00:29:18,000

So now I can pass two arguments to dismiss it.



447

00:29:18,000 --> 00:29:21,820

So the first one is going to be for example the first number.



448

00:29:21,990 --> 00:29:25,890

So we get this value from the first actually editrix.



449

00:29:25,890 --> 00:29:28,530

So first number we have a type here.



450

00:29:28,530 --> 00:29:34,760

So the first number and we need to pass the second argument so second number semicolon.



451

00:29:35,010 --> 00:29:35,790

Right.



452

00:29:35,790 --> 00:29:37,820

So now we have actually an error.



453

00:29:37,830 --> 00:29:39,650

So let me show you what is this error.



454

00:29:39,660 --> 00:29:44,890

Let's actually hover over the scanner here and says unhandled exception Android that.



455

00:29:44,910 --> 00:29:46,740

Or is that remote exception.



456

00:29:46,740 --> 00:29:49,260

So now let me show you why we have this exception.



457

00:29:49,350 --> 00:29:51,140

So let's go to this idea file.



458

00:29:51,360 --> 00:29:53,640

As you can see we declared this method here.



459

00:29:53,640 --> 00:29:54,030

Right.



460

00:29:54,180 --> 00:29:57,110

But we provide it at implementation for this method.



461

00:29:57,270 --> 00:30:00,120

Inside this model application said we start Java.



462

00:30:00,450 --> 00:30:05,240

So here look at this piece of code here inside this block of code.



463

00:30:05,250 --> 00:30:07,700

You can see that we actually overwrite it dismiss it.



464

00:30:07,740 --> 00:30:09,200

Multiply two values together.



465

00:30:09,270 --> 00:30:13,070

So we get dismembered from this interface must multiply interface.



466

00:30:13,260 --> 00:30:16,620

And now you can see that it actually froze an exception.



467

00:30:16,620 --> 00:30:22,530

This is really important so because the sniffer froze and it's an exception and it is called the remote



468

00:30:22,530 --> 00:30:23,360

exception.



469

00:30:23,570 --> 00:30:27,050

The Actually must handle this exception.



470

00:30:27,060 --> 00:30:31,130

Otherwise the compiler is not going to allow us to run our application.



471

00:30:31,170 --> 00:30:32,630

So let's go to main activity here.



472

00:30:32,630 --> 00:30:34,720

And inside is actually Smurfette here.



473

00:30:34,860 --> 00:30:41,330

Before this line of code here is actually just typing try I can provide a try block here.



474

00:30:41,670 --> 00:30:48,090

I can't try and then put a catch block and that here inside the parenthesis of this catch here I can



475

00:30:48,090 --> 00:30:50,070

say REMAUT exception.



476

00:30:50,160 --> 00:30:52,740

So you know what is the name of that exception.



477

00:30:52,740 --> 00:30:53,090

Right.



478

00:30:53,160 --> 00:30:56,780

So because inside is so multiplication so we start over.



479

00:30:56,850 --> 00:30:59,040

You can see the name of this exception.



480

00:30:59,190 --> 00:31:01,120

So let's go to the main issue with the Java here.



481

00:31:01,160 --> 00:31:02,310

And inside the sunken ship.



482

00:31:02,460 --> 00:31:06,570

So the type is more the exception and the name is eat right.



483

00:31:06,750 --> 00:31:10,360

And here again just open and close this catch block by using these curly braces.



484

00:31:10,530 --> 00:31:17,280

And here let's just select this line of code here and just cut this line of code and just paste this



485

00:31:17,280 --> 00:31:19,590

line of Cahir inside is try block.



486

00:31:19,800 --> 00:31:20,430

Right.



487

00:31:20,640 --> 00:31:22,480

And now the air is gone.



488

00:31:22,500 --> 00:31:25,240

So now we have this valuable result.



489

00:31:25,260 --> 00:31:30,420

My interface that Multiplex Jubilees together and now we're actually handling this exception because



490

00:31:30,420 --> 00:31:32,030

we put it inside is triplex.



491

00:31:32,220 --> 00:31:34,560

So if we can actually just print.



492

00:31:34,710 --> 00:31:39,170

So here I can say Eat Eat at a print stack trace.



493

00:31:39,340 --> 00:31:39,970

Right.



494

00:31:40,020 --> 00:31:46,340

So we can just print these values to the larg later when I should and Eric Harris.



495

00:31:46,370 --> 00:31:47,910

So we have this right here.



496

00:31:48,020 --> 00:31:54,950

And here I can insert this tripe like I can say TXI the multiply these are the set text.



497

00:31:55,010 --> 00:31:59,720

And here I can refer to the name of this rally about a result but because this is actually an integer



498

00:31:59,870 --> 00:32:06,830

value and if it needs are valuable a value of type string I can convert this value to string value by



499

00:32:06,830 --> 00:32:11,520

just putting a plus operator and then put to double quotes here.



500

00:32:11,540 --> 00:32:15,840

So now let's run our project and see what happens.



501

00:32:18,070 --> 00:32:19,340

Let me show you the emulator.



502

00:32:19,360 --> 00:32:24,210

So now as you can see here my application is running on this emulator.



503

00:32:24,250 --> 00:32:26,320

So now we need to provide the first value.



504

00:32:26,390 --> 00:32:31,120

So the first value is going to be number 10 and the second value is going to be number.



505

00:32:31,120 --> 00:32:32,580

For example again 10.



506

00:32:32,830 --> 00:32:34,230

So let's click on the.



507

00:32:34,720 --> 00:32:36,430

And we have number 100.



508

00:32:36,670 --> 00:32:39,400

So let's change the first value to 5.



509

00:32:39,580 --> 00:32:43,620

And the second value 2 numbers to right let's click on this button again.



510

00:32:43,720 --> 00:32:49,570

And now we have numbered 10 or less change the first value to number three and click on this button.



511

00:32:49,570 --> 00:32:51,290

Now we have number six.



512

00:32:51,340 --> 00:32:56,670

So now you can see that how we used this IDL in Android.



513

00:32:56,710 --> 00:33:03,520

So I think now you can actually figure out how to use a million Android and if you have any questions



514

00:33:03,520 --> 00:33:08,650

about these concepts that I taught you in this lesson please post the discussion in the course and then



515

00:33:08,660 --> 00:33:10,800

I'll do my best to answer all of your questions.



516

00:33:10,810 --> 00:33:13,820

Thank you very much for watching and I'll see you in the next Steve Tauriel.