1

00:00:00,960 --> 00:00:05,530

And here inside the unclick Meffert I can just put in some lines of code here.



2

00:00:06,000 --> 00:00:14,370

So first of all this actually creates a new class so just click on View tool windows and then a project



3

00:00:15,200 --> 00:00:18,380

an inside job or folder here you can see this is our package.



4

00:00:18,450 --> 00:00:19,120

OK.



5

00:00:19,380 --> 00:00:26,800

And now I want to actually create another activity class for my second Underland activity that.



6

00:00:26,820 --> 00:00:27,440

OK.



7

00:00:27,660 --> 00:00:33,570

So every exemplify as you can see here needs to have an activity activity activity class.



8

00:00:33,990 --> 00:00:39,970

And here I want to actually create an activity for this second underline activity that is similar.



9

00:00:39,990 --> 00:00:42,630

So here I just need to right click on this package here.



10

00:00:42,790 --> 00:00:52,690

OK new and then click on dhaba class and for the class name just type in here.



11

00:00:52,760 --> 00:01:02,530

Second activity Okay now as you can see this is our second activity class and because if you want to



12

00:01:02,530 --> 00:01:08,140

actually create an activity here I just enjoy taking extends activity.



13

00:01:08,410 --> 00:01:08,830

OK.



14

00:01:08,890 --> 00:01:10,940

As you can see here this is our activity class.



15

00:01:10,960 --> 00:01:11,400

OK.



16

00:01:11,630 --> 00:01:18,550

Or I can even inherit from this Abqaiq are compact activity which I should in indirectly inherits from



17

00:01:18,560 --> 00:01:23,460

these all of the features and behaviors that are inside of the activity class.



18

00:01:23,470 --> 00:01:29,590

So inside the second activity class instead of just referring to the name of this activity class I can



19

00:01:29,590 --> 00:01:33,040

just open up compact activity OK.



20

00:01:33,430 --> 00:01:39,430

And this is better because in this way we are going to inherit lots and lots of methods from those classes



21

00:01:39,430 --> 00:01:42,930

that we actually inherit directly or indirectly.



22

00:01:43,200 --> 00:01:43,750

OK.



23

00:01:44,050 --> 00:01:50,830

So first of all inside of this class I need to actually override the uncreate method that we actually



24

00:01:51,160 --> 00:01:54,240

inherit from the superclass.



25

00:01:54,250 --> 00:02:01,660

So uncreate OK I just need to select this uncreate and for that you can see here on create save instance



26

00:02:02,050 --> 00:02:03,160

state.



27

00:02:03,160 --> 00:02:05,460

So as you can see here this is our uncreate method.



28

00:02:05,470 --> 00:02:06,070

OK.



29

00:02:06,310 --> 00:02:11,380

And here as you can see it is calling this on creating an effect on these superclass.



30

00:02:11,540 --> 00:02:21,500

OK and now let's actually called the set set content view here said content view Meffert and then select



31

00:02:21,520 --> 00:02:23,400

does it here sent content for you.



32

00:02:23,410 --> 00:02:28,680

And as you can see here it accepts an argument of type integer layout raise ID.



33

00:02:28,990 --> 00:02:29,510

OK.



34

00:02:29,770 --> 00:02:34,270

And here we need to actually be fair to the name of our ID inside of these.



35

00:02:34,400 --> 00:02:42,870

So you have to lay out that ok or dot lay out that section I underline activity.



36

00:02:43,530 --> 00:02:44,020

OK.



37

00:02:44,170 --> 00:02:48,190

So in this way it can actually initialize the second activity exemplified.



38

00:02:48,220 --> 00:02:48,810

OK.



39

00:02:48,970 --> 00:02:52,320

So so that we can actually see this file on the screen.



40

00:02:52,440 --> 00:02:53,350

OK.



41

00:02:53,620 --> 00:02:54,540

And now.



42

00:02:54,550 --> 00:02:58,800

So now let's actually go back inside these main activity the double file here.



43

00:02:58,900 --> 00:03:01,800

And now let's actually put putting some more lines of code here.



44

00:03:01,900 --> 00:03:06,820

Here I want to actually put in some lines of code in order to let use.



45

00:03:07,090 --> 00:03:13,240

If the user click on the spot in there and actually guide it to the second screen which is the second



46

00:03:13,240 --> 00:03:14,120

activity here.



47

00:03:14,200 --> 00:03:14,810

OK.



48

00:03:15,310 --> 00:03:21,200

So now inside of this enclave if at first about I need to actually create an intent object.



49

00:03:21,220 --> 00:03:21,700

OK.



50

00:03:21,880 --> 00:03:28,830

And intent is actually a class that allows us to actually go from one activity to another activity.



51

00:03:28,840 --> 00:03:29,260

OK.



52

00:03:29,380 --> 00:03:32,980

So intent intent that the name of our object is intent.



53

00:03:32,980 --> 00:03:37,510

Assignment operator new intent.



54

00:03:37,510 --> 00:03:40,060

So here I actually created an object of type intent.



55

00:03:40,190 --> 00:03:40,390

OK.



56

00:03:40,480 --> 00:03:46,000

And the name of this object is intent and this object actually allows us to go from one activity to



57

00:03:46,000 --> 00:03:46,780

another activity.



58

00:03:46,780 --> 00:03:47,360

OK.



59

00:03:47,740 --> 00:03:53,360

So here I can just type in intent that sets class.



60

00:03:53,620 --> 00:03:54,310

OK.



61

00:03:54,730 --> 00:03:59,980

So this method actually to accepts two arguments the first argument is actually the source class the



62

00:03:59,980 --> 00:04:00,660

first class.



63

00:04:00,680 --> 00:04:05,520

The second argument is the destination classic class that is actually our target.



64

00:04:05,710 --> 00:04:06,110

OK.



65

00:04:06,130 --> 00:04:07,870

The first class is the main activity.



66

00:04:07,870 --> 00:04:08,310

OK.



67

00:04:08,440 --> 00:04:15,080

So here I just need to type in this comma and the second class is the second activity.



68

00:04:15,080 --> 00:04:19,910

OK so the second activity is this second activity as you can see here.



69

00:04:19,960 --> 00:04:27,490

So I can't just say insurgent activity that class and then I need to put in a semicolon at the end of



70

00:04:27,490 --> 00:04:28,760

my statement here.



71

00:04:29,300 --> 00:04:33,660

And now I need to actually the column effect from the from the activity class.



72

00:04:33,760 --> 00:04:34,300

OK.



73

00:04:34,420 --> 00:04:38,980

So here we are actually inheriting all of the features and behaviors that are inside of this activity



74

00:04:38,980 --> 00:04:39,280

class.



75

00:04:39,280 --> 00:04:39,890

OK.



76

00:04:40,120 --> 00:04:43,520

So I can just typing start activity.



77

00:04:43,660 --> 00:04:47,130

So this activity Meffert actually accepts an argument of type intent.



78

00:04:47,140 --> 00:04:50,020

So here I can just refer to the name of this object.



79

00:04:50,040 --> 00:04:52,820

Intent OK.



80

00:04:53,240 --> 00:04:56,720

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



81

00:04:56,800 --> 00:05:02,530

So as you can see here our application is running on this emulator and this is our first activity.



82

00:05:02,650 --> 00:05:03,970

OK.



83

00:05:03,970 --> 00:05:07,740

And this is our source class and we want to actually move on to the next activity.



84

00:05:07,750 --> 00:05:08,330

OK.



85

00:05:08,590 --> 00:05:10,530

So here I just need to click on this.



86

00:05:10,540 --> 00:05:13,250

Let's go to second activity OK.



87

00:05:13,330 --> 00:05:14,670

So let's click on this.



88

00:05:14,940 --> 00:05:17,570

And now as you can see our application crashed.



89

00:05:17,920 --> 00:05:22,010

Let's actually go inside this lock here and see what's the cause of this error.



90

00:05:22,240 --> 00:05:29,280

And here as you can see it says how do you declare this activity in your Android manifest that XML.



91

00:05:29,290 --> 00:05:33,130

So let's see what's the advertisement manifested exemplified.



92

00:05:33,130 --> 00:05:40,060

So let's actually click on this view here to the windows project and here as you can see we have a manifest



93

00:05:40,060 --> 00:05:40,810

folder here.



94

00:05:40,840 --> 00:05:42,030

OK.



95

00:05:42,040 --> 00:05:47,410

And inside of this manifest folder there is there is a file called Android manifesto examine and this



96

00:05:47,410 --> 00:05:49,800

is our Android manifesto exemplified.



97

00:05:50,110 --> 00:05:55,630

And as you can see here inside of this manifest take as you can see there are some lines of code here



98

00:05:55,810 --> 00:05:57,990

and we have this application here.



99

00:05:58,230 --> 00:05:59,210

OK.



100

00:05:59,430 --> 00:06:04,040

Application tag and inside of this application tag we have this activity.



101

00:06:04,110 --> 00:06:04,470

OK.



102

00:06:04,500 --> 00:06:10,110

So here as you can see this is the activity attack and inside of this activity tag as you can see it



103

00:06:10,110 --> 00:06:13,000

says Android name dot main activity.



104

00:06:13,270 --> 00:06:19,360

So does that mean activity refers to this main activity class as he can see inside of this package.



105

00:06:19,470 --> 00:06:21,560

Ok this is our own package.



106

00:06:21,600 --> 00:06:27,190

So if I actually declare another class inside another package I need to actually first of all refer



107

00:06:27,190 --> 00:06:31,330

to the name of that package and then I need to refer to the name of that class.



108

00:06:31,440 --> 00:06:34,680

But here we don't need to refer to the name of this package.



109

00:06:34,770 --> 00:06:41,070

Just putting dots here is enough so that main activity refers to the name of this class inside of this



110

00:06:41,070 --> 00:06:41,910

package.



111

00:06:42,300 --> 00:06:49,920

And here we have Android label as you can see here and here as you can see it says Android app frailty.



112

00:06:50,060 --> 00:06:56,010

OK this is the label of our application app for flirty which you can see at the top of the email emulator



113

00:06:56,550 --> 00:06:56,720

app.



114

00:06:56,730 --> 00:07:00,020

Firstly And this is the theme of our application.



115

00:07:00,030 --> 00:07:03,570

So at sign the style slash apophenia does no action bar.



116

00:07:03,830 --> 00:07:04,230

OK.



117

00:07:04,290 --> 00:07:06,740

So I'll talk more about these values later.



118

00:07:07,050 --> 00:07:11,080

But here as you can see it says intent dasht fruiterer.



119

00:07:11,270 --> 00:07:11,850

OK.



120

00:07:12,240 --> 00:07:17,880

So here for the first time that application is actually running we need to actually specify the activity



121

00:07:17,880 --> 00:07:21,830

the first activity the entry point of activity inside is.



122

00:07:21,870 --> 00:07:26,190

And like manifests for the entry point of our application is this main activity.



123

00:07:26,200 --> 00:07:26,860

OK.



124

00:07:27,160 --> 00:07:28,740

Activity underline me.



125

00:07:29,150 --> 00:07:29,930

OK.



126

00:07:29,970 --> 00:07:38,280

So here we need to specify that we want to actually first of all run when we want to show the the activity



127

00:07:38,280 --> 00:07:39,870

Underland mean that exemption to the user.



128

00:07:39,900 --> 00:07:40,260

OK.



129

00:07:40,380 --> 00:07:46,050

So first what that are laid out is the entry point for our application.



130

00:07:46,050 --> 00:07:54,150

So here inside this intent dash filters tag as you can see here it says Android that intense that action



131

00:07:54,150 --> 00:07:54,890

that main.



132

00:07:55,030 --> 00:07:57,920

OK we have two takes action and category.



133

00:07:58,170 --> 00:08:02,110

And here it says Android that intent the chatter luncher.



134

00:08:02,460 --> 00:08:07,850

OK so the activity underline minute example is the lantern over application.



135

00:08:08,000 --> 00:08:08,360

OK.



136

00:08:08,370 --> 00:08:13,470

So here after the ending tag of this activity here I want to actually create another activity for the



137

00:08:13,470 --> 00:08:14,550

second activity.



138

00:08:14,750 --> 00:08:19,490

So inside of this application tag all you want to create another attack here.



139

00:08:19,580 --> 00:08:20,190

OK.



140

00:08:20,340 --> 00:08:25,120

So after this activity here I can't just create another activity.



141

00:08:25,200 --> 00:08:29,300

So after this activity tag I can't just create another activity here.



142

00:08:29,310 --> 00:08:35,630

So just open this tag here activity and then press enter key on your keyboard.



143

00:08:35,640 --> 00:08:41,700

So here as you can see inside of these double quotes it says second activity or that main activity here



144

00:08:41,730 --> 00:08:44,540

I can choose this second activity OK.



145

00:08:44,610 --> 00:08:48,750

And then here I can actually specify the label.



146

00:08:48,780 --> 00:08:49,120

OK.



147

00:08:49,140 --> 00:08:55,430

So here I can just type in label and then present into the key on your keyboard and inside the double



148

00:08:55,440 --> 00:08:55,860

quotes.



149

00:08:55,860 --> 00:08:59,610

I can just type insurgent activity.



150

00:09:00,270 --> 00:09:00,660

OK.



151

00:09:00,720 --> 00:09:05,540

I can even specify the theme of my activity so Feme.



152

00:09:06,330 --> 00:09:11,590

And here I can choose this screen here at Slate and slide slash and Feme does no action.



153

00:09:11,870 --> 00:09:12,530

OK.



154

00:09:12,840 --> 00:09:17,510

And then here I need to actually close the stack here or Katis activity take.



155

00:09:17,580 --> 00:09:20,610

So just I just need to put in a closing tag here.



156

00:09:21,000 --> 00:09:25,410

And as you can see here we can see this activity tag here.



157

00:09:25,410 --> 00:09:29,760

So this is our activity tag that we actually putting in after this tag here.



158

00:09:29,880 --> 00:09:31,760

And inside of this application.



159

00:09:31,830 --> 00:09:32,370

OK.



160

00:09:32,610 --> 00:09:38,620

So activity and right name the second activity Android label second activity and Rufin.



161

00:09:38,910 --> 00:09:40,300

I feel that no action.



162

00:09:40,380 --> 00:09:43,050

OK so now let's actually run our project.



163

00:09:43,050 --> 00:09:49,770

So again as you can see our application is running on this emulator and it says this is our first activity.



164

00:09:49,920 --> 00:09:50,610

Okay.



165

00:09:50,850 --> 00:09:57,220

And now I want to actually click on this button here that says let's go to second activity.



166

00:09:57,630 --> 00:10:01,080

And now as you can see this is our second activity here.



167

00:10:01,400 --> 00:10:01,690

OK.