1

00:00:00,380 --> 00:00:03,360

Or you can specify the application name.



2

00:00:03,360 --> 00:00:04,350

He had also.



3

00:00:04,470 --> 00:00:08,280

So for example I can say firebase database instance.



4

00:00:08,310 --> 00:00:13,820

So not just that I actually offered to this firebase database instance not this database reference this



5

00:00:13,830 --> 00:00:19,440

database reference here now is referring to these computers category but now I want to actually create



6

00:00:19,650 --> 00:00:22,750

another child for our database instance.



7

00:00:22,890 --> 00:00:27,190

So if I show you the database now as you can see we have this instance right.



8

00:00:27,210 --> 00:00:29,830

So here I can say firebase database instance.



9

00:00:29,970 --> 00:00:31,990

Now I am into this instance right.



10

00:00:32,250 --> 00:00:37,480

So firebase database instance thought good reference.



11

00:00:38,010 --> 00:00:41,340

And here inside the double code I can specify the reference.



12

00:00:41,340 --> 00:00:48,230

So here I can say application underline name.



13

00:00:48,540 --> 00:00:49,080

Right.



14

00:00:49,140 --> 00:00:56,210

So this is going to be the key that set that set value.



15

00:00:56,360 --> 00:00:59,400

Now I can specify the value here instead of double quotes.



16

00:00:59,400 --> 00:01:01,980

I can't say computers



17

00:01:04,260 --> 00:01:08,540

data and then I can put a semicolon at the end of my statement.



18

00:01:08,550 --> 00:01:12,290

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



19

00:01:12,300 --> 00:01:16,670

Now let me show you the web browser and the emulator.



20

00:01:16,700 --> 00:01:21,800

So now as you can see here it's going to actually create a new key here and a new value.



21

00:01:21,800 --> 00:01:29,350

So here as you can see we have these key application name and we have this value computerless data right.



22

00:01:29,360 --> 00:01:34,760

So if we actually go to the Android studio here now you can see that we actually specified a reference



23

00:01:35,090 --> 00:01:37,220

to this firebase database instance.



24

00:01:37,250 --> 00:01:42,360

So application name is the actually is the key and the value is computer's data.



25

00:01:42,560 --> 00:01:46,050

So now we want to actually get this data from the server.



26

00:01:46,070 --> 00:01:46,600

Right.



27

00:01:46,610 --> 00:01:48,040

So let's see how we can do that.



28

00:01:48,170 --> 00:01:50,250

So you already know how to do this here.



29

00:01:50,300 --> 00:01:54,800

You can't just create an add value listener here for this key.



30

00:01:55,040 --> 00:02:01,320

So here I can say for your base database instance that get the reference.



31

00:02:01,460 --> 00:02:08,260

So I want to actually create a listener OK and add at a value listener here for this key application



32

00:02:08,260 --> 00:02:08,450

name.



33

00:02:08,450 --> 00:02:11,940

So now let me show you the web browser as you can see we have this key here right.



34

00:02:11,960 --> 00:02:18,080

So now then I want to actually create a listener and add value listener here as you can see here we



35

00:02:18,080 --> 00:02:19,770

can actually get this data.



36

00:02:19,940 --> 00:02:24,980

We can be actually not notified when this data is actually changed.



37

00:02:24,980 --> 00:02:27,640

So let's see first we need to specify the key.



38

00:02:27,650 --> 00:02:33,310

So now managed to copy this value here and now I can paste it here right.



39

00:02:33,340 --> 00:02:37,660

And here I can say that add value event listener.



40

00:02:38,030 --> 00:02:42,150

And here let's actually just type in here new.



41

00:02:42,690 --> 00:02:43,400

Right.



42

00:02:43,400 --> 00:02:48,200

So now after this Apprentice's here let's actually create a new line so that you can see these values



43

00:02:48,200 --> 00:02:48,720

here.



44

00:02:48,740 --> 00:02:52,760

So firebase database instance that gets reference this value.



45

00:02:52,790 --> 00:03:01,100

So here we are referring to this key dot add value event listener and inside Apprentice's new and just



46

00:03:01,100 --> 00:03:05,290

hold the shift key on your keyboard and then press on the leader key on your keyboard.



47

00:03:05,450 --> 00:03:10,840

And now the autocomplete feature of the Android studio is going to help you to choose this option value



48

00:03:10,850 --> 00:03:14,600

event listener and then press enter on your keyboard.



49

00:03:14,630 --> 00:03:20,840

So now you can see here these lines of code here are actually put here automatically by Android studio.



50

00:03:21,050 --> 00:03:24,480

So now at the end of this parenthesis we just need to put a semicolon.



51

00:03:24,740 --> 00:03:25,280

Right.



52

00:03:25,470 --> 00:03:28,500

And now inside is an data change method.



53

00:03:28,610 --> 00:03:33,660

We can easily get the value of this key here as you can see we have this argument right.



54

00:03:33,680 --> 00:03:34,850

Data snapshot.



55

00:03:35,030 --> 00:03:41,030

So this data snapshot argument actually holds the value of this key application.



56

00:03:41,090 --> 00:03:41,700

Right.



57

00:03:41,720 --> 00:03:46,160

We are creating this add value event listener on this key.



58

00:03:46,310 --> 00:03:46,790

Right.



59

00:03:46,790 --> 00:03:52,790

So now this data snapshot actually holds the value of Diski and now I can actually just get that value



60

00:03:52,790 --> 00:03:53,150

here.



61

00:03:53,150 --> 00:03:55,660

So here I can create a string variable.



62

00:03:55,820 --> 00:04:04,510

And here I can say string value or string application name application name assignment operator data



63

00:04:04,520 --> 00:04:05,290

snapshot.



64

00:04:05,370 --> 00:04:07,700

That gets value.



65

00:04:10,160 --> 00:04:16,760

Semi-colon and then in the inside Apprentice's I need to specify the date or type String class.



66

00:04:16,790 --> 00:04:21,010

So here now we've got this value application name.



67

00:04:21,290 --> 00:04:25,170

So now let me show you the emulator here.



68

00:04:25,460 --> 00:04:31,040

As you can see at the top insert this toolbar we have the name of this application app 64.



69

00:04:31,040 --> 00:04:31,580

Right.



70

00:04:31,730 --> 00:04:37,060

But now I want to get the name of the application from the server as you can see here we have this key



71

00:04:37,070 --> 00:04:37,470

right.



72

00:04:37,580 --> 00:04:40,930

Now let me show you the web browser as you can see.



73

00:04:41,240 --> 00:04:46,610

We have this key inside the inside our firebase database and disvalue.



74

00:04:46,730 --> 00:04:51,230

Now I want to change the value of these toolbar as you can see here.



75

00:04:51,380 --> 00:04:53,880

I want to change the value of the application here.



76

00:04:54,110 --> 00:04:57,380

Application Name to this value computer's data.



77

00:04:57,530 --> 00:05:02,630

So in order to do that you can actually just say get support action bar.



78

00:05:02,630 --> 00:05:07,430

So this method gets support action but it's going to actually give us this toolbar here.



79

00:05:07,430 --> 00:05:08,020

Right.



80

00:05:08,240 --> 00:05:15,350

And here I can say that said title get support action by that said title as you can see here this value



81

00:05:15,350 --> 00:05:19,270

of 64 is the title of this action bar here right.



82

00:05:19,280 --> 00:05:21,170

So get support action.



83

00:05:21,170 --> 00:05:23,510

But that said titel application.



84

00:05:23,900 --> 00:05:27,150

So now we are getting the application name from the server.



85

00:05:27,200 --> 00:05:32,560

As you can see here computers later on we are putting that value on the title of this action.



86

00:05:32,960 --> 00:05:41,980

So now let's run our project and now let me show you the web browser and the emulator and here as you



87

00:05:41,980 --> 00:05:48,320

can see the value here the title of this action board is computers they tell you you are getting this



88

00:05:48,320 --> 00:05:49,530

value from the server.



89

00:05:49,550 --> 00:05:55,730

This means that if you actually change this value to another value for example computers and if I press



90

00:05:55,730 --> 00:06:00,490

and enter on my keyboard now this value is also changed.



91

00:06:00,490 --> 00:06:03,280

Computers right.



92

00:06:03,310 --> 00:06:05,410

So hopefully that makes sense.



93

00:06:05,410 --> 00:06:12,660

So let's actually change this value to computers data computers database and the person on your keyboard.



94

00:06:12,670 --> 00:06:16,510

And now you can see this while your computer's database.



95

00:06:16,510 --> 00:06:17,350

Right.



96

00:06:17,350 --> 00:06:19,400

So let's go back to android studio.



97

00:06:19,820 --> 00:06:27,010

And now after this listener after the add value event listener for this application name as you can



98

00:06:27,010 --> 00:06:30,080

see here now inside these uncreate Meffert right.



99

00:06:30,100 --> 00:06:31,600

I am inside these uncreate Meffert.



100

00:06:31,780 --> 00:06:38,310

So now I want to create a listener for this Potin as you can see here.



101

00:06:38,450 --> 00:06:39,070

Right.



102

00:06:39,340 --> 00:06:44,680

So here I can say between sent or update data.



103

00:06:44,890 --> 00:06:45,340

Right.



104

00:06:45,340 --> 00:06:52,370

That said unclick listener new view that unclick listener right.



105

00:06:52,750 --> 00:06:55,440

And now you are Enceladus uncle method.



106

00:06:55,510 --> 00:07:02,080

So first of all I'm going to pace some lines of code here inside the unclick effort here and then I'm



107

00:07:02,080 --> 00:07:04,460

going to explain to you what's going on here.



108

00:07:04,810 --> 00:07:09,730

So as you can see here these are the lines of code that I pasted here.



109

00:07:10,000 --> 00:07:12,770

So look at this line of code here in line number 92.



110

00:07:12,940 --> 00:07:18,090

We have actually a variable of type string and the name of this variable is computer name.



111

00:07:18,370 --> 00:07:25,210

And then I put an assignment operator here and then I refer to this editor EDT computer name.



112

00:07:25,270 --> 00:07:25,640

Right.



113

00:07:25,660 --> 00:07:27,460

So now let me show you the emulator.



114

00:07:27,460 --> 00:07:32,180

So this is actually the EDT computer name that takes that to a stranger.



115

00:07:32,380 --> 00:07:35,760

And then here we are assigning this value to this computer nobody.



116

00:07:35,980 --> 00:07:40,730

So this means that you are actually getting the text value of this as it takes.



117

00:07:40,810 --> 00:07:46,470

And we are converting it to our string value and then we are assigning that as string value to this



118

00:07:46,470 --> 00:07:48,490

computer named string variable.



119

00:07:48,520 --> 00:07:49,630

Right.



120

00:07:49,630 --> 00:07:55,030

And again in line number 93 if you have another string variable and the name of this value event is



121

00:07:55,030 --> 00:07:57,810

computer power assignment operator.



122

00:07:57,980 --> 00:07:59,540

EDT computer power.



123

00:07:59,590 --> 00:08:02,560

So this idiotic computer power refers to this as the text.



124

00:08:02,590 --> 00:08:03,530

Right.



125

00:08:03,670 --> 00:08:07,240

It is the computer power that get text that restraint.



126

00:08:07,450 --> 00:08:13,090

And here we are assigning that string value to this computer power line number 44.



127

00:08:13,300 --> 00:08:14,810

Number 94.



128

00:08:14,830 --> 00:08:21,990

We have another string variable and the name of this variable is computer speed assignment operator.



129

00:08:22,220 --> 00:08:26,300

EDT computer speed that get text that too strange.



130

00:08:26,320 --> 00:08:27,970

So EDT computer speed.



131

00:08:27,970 --> 00:08:29,850

Is this value right.



132

00:08:29,860 --> 00:08:35,770

We are getting the value of this he takes the computer's speed and then we are actually converting that



133

00:08:35,770 --> 00:08:37,370

value to us think value.



134

00:08:37,390 --> 00:08:41,760

And here we are assigning that value to this computer speed value.



135

00:08:42,310 --> 00:08:45,580

So here we are doing the same thing to this computer run valuable.



136

00:08:45,580 --> 00:08:50,800

So here we have a variable of type streambed computer ramp assignment operator.



137

00:08:50,850 --> 00:08:52,010

It is the computer RAM.



138

00:08:52,060 --> 00:08:56,570

So this is the computer Romley First it takes that gettext that restraint.



139

00:08:56,740 --> 00:09:03,880

And here we are assigning that value to this computer I'm in line number 96 as you can see here we have



140

00:09:03,970 --> 00:09:10,500

another variable which is of type string and the name is computer screen assignment operator.



141

00:09:10,660 --> 00:09:12,090

It is the computer screen.



142

00:09:12,190 --> 00:09:18,860

So as you can see this value is referring to this edit text editing computer screen that get it that



143

00:09:18,940 --> 00:09:20,600

get text that to history.



144

00:09:20,800 --> 00:09:27,850

So here it is actually assigning that string value to this computer screen up valuable an inline number



145

00:09:27,850 --> 00:09:28,720

97.



146

00:09:28,720 --> 00:09:33,490

We have another rowdier bill and again the data type of this variable is strange.



147

00:09:33,760 --> 00:09:37,300

Assignment operator it is the computer keyboard.



148

00:09:37,300 --> 00:09:42,360

So here we are referring to this actually this eddy takes it into a computer keyboard.



149

00:09:42,610 --> 00:09:46,540

And now that good text that too is strange.



150

00:09:46,570 --> 00:09:46,980

Right.



151

00:09:46,990 --> 00:09:53,770

So here you are assigning this string value to a computer keyboard string variable and in line number



152

00:09:53,770 --> 00:09:54,590

98.



153

00:09:54,610 --> 00:10:01,840

We have another variable and the name of this value event is our computer CPQ assignment operator EDT



154

00:10:01,890 --> 00:10:06,520

computer Sibiu So this computer security is referring to this as it takes.



155

00:10:06,520 --> 00:10:07,360

Right.



156

00:10:07,400 --> 00:10:13,570

EDT computer Sibiu that get text that restraint and we are assigning the value of this string value



157

00:10:13,570 --> 00:10:20,830

as you can see here the value of the EDT computer APCP you to this computer Sibiu body.



158

00:10:21,130 --> 00:10:26,590

So now I'm going to pasting some more lines of code here inside this uncle some of it and then I'm going



159

00:10:26,590 --> 00:10:28,490

to explain to you what's going on here.