1

00:00:00,360 --> 00:00:09,350

So here it's time to initialize or file Vaadia that we created here inside our Meffert save say it in



2

00:00:09,360 --> 00:00:10,470

line number 24.



3

00:00:10,470 --> 00:00:15,010

So here we are inside the safe and Meffert inside this savefile class actually.



4

00:00:15,480 --> 00:00:23,220

So after this line of code here in line number 32 that actually specifies the unique image name I'm



5

00:00:23,220 --> 00:00:31,620

going to initialize my valuable my file actually the modified assignment operator on here I can see



6

00:00:31,620 --> 00:00:33,560

a new file.



7

00:00:34,670 --> 00:00:35,280

Right.



8

00:00:35,360 --> 00:00:37,570

So we need to pass the pathname.



9

00:00:37,570 --> 00:00:38,890

Look at this argument here.



10

00:00:38,890 --> 00:00:44,410

It says to pathname So the pathname is going to be the directory.



11

00:00:44,510 --> 00:00:46,010

We created the directory here right.



12

00:00:46,010 --> 00:00:47,510

Peteris directory.



13

00:00:47,690 --> 00:00:48,320

Right.



14

00:00:48,420 --> 00:00:56,060

Avi folder color pictures plus the filename the unique image and so I can say pictures directory plus



15

00:00:56,540 --> 00:00:57,970

unique image name.



16

00:00:58,520 --> 00:01:00,000

So this is going to be our file.



17

00:01:00,140 --> 00:01:03,750

So we need to write this file to an external storage.



18

00:01:03,830 --> 00:01:12,470

So now it's time to specify that whether or external storage has free space or not.



19

00:01:12,470 --> 00:01:20,300

So let's actually create a variable of type long and the name of this valuable is going to be remaining



20

00:01:20,390 --> 00:01:31,090

space remaining space assignment operator and I'm going to refer to are actually to our directory which



21

00:01:31,090 --> 00:01:35,290

is going to be pictures directory right up this piece history be valuable.



22

00:01:35,380 --> 00:01:39,460

So I can say pictures directory dot just type in here.



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00:01:39,460 --> 00:01:41,170

Free get free space.



24

00:01:41,320 --> 00:01:42,430

Semicolon.



25

00:01:42,430 --> 00:01:47,410

So it's going to return to free space that is remained inside or extend out of storage and it's going



26

00:01:47,410 --> 00:01:51,540

to assign it to this valuable remaining space which is after lunch.



27

00:01:51,640 --> 00:01:52,710

Right.



28

00:01:52,720 --> 00:01:56,770

And notice that the return value is going to be off type bytes.



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00:01:57,010 --> 00:01:57,780

OK.



30

00:01:57,790 --> 00:02:01,420

It's going to return the free space in bytes.



31

00:02:01,420 --> 00:02:08,710

Now it's time to specify that how many actually it's space in bytes are actually needed in order to



32

00:02:08,770 --> 00:02:11,870

save our bitmapped to external storage.



33

00:02:11,980 --> 00:02:12,370

Right.



34

00:02:12,370 --> 00:02:19,850

So I'm going to again create another variable of type at lunch and I can see the required required space



35

00:02:20,720 --> 00:02:26,060

assignment operator and this method has an argument of type bitmap right.



36

00:02:26,060 --> 00:02:32,610

So when I refer to this bitmap here bitmap that gets byte count semicolon.



37

00:02:32,870 --> 00:02:39,540

So it's going our return to count of the bytes of this bitmap object of this image actually.



38

00:02:39,770 --> 00:02:41,070

And it's going to assign it to this value.



39

00:02:41,070 --> 00:02:44,580

But now it's time to create an if statement.



40

00:02:44,580 --> 00:02:56,090

So if I'm here I'm going to actually refer to the required space if remaining if required space multiplied



41

00:02:56,450 --> 00:03:03,890

by one point eight is less than remaining space.



42

00:03:04,460 --> 00:03:07,250

Let's open and close this statement by using this curly braces.



43

00:03:07,460 --> 00:03:08,340

So what does this mean.



44

00:03:08,360 --> 00:03:10,040

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



45

00:03:10,040 --> 00:03:12,290

Exactly what does this mean here.



46

00:03:12,320 --> 00:03:19,370

This means that if the required space which is going to be the count of the parts of this bitmap object



47

00:03:19,370 --> 00:03:24,100

right the image multiplied by this value of one point eight.



48

00:03:24,320 --> 00:03:28,990

If the result of this operation is less than the value of the remaining space.



49

00:03:28,990 --> 00:03:37,320

This means that we have enough space inside our external storage in order to save our image there.



50

00:03:37,550 --> 00:03:38,640

Right.



51

00:03:38,660 --> 00:03:42,260

So this is a formula you can use it later here.



52

00:03:42,350 --> 00:03:48,640

This operation here is very important in order to specify that whether we have a remaining space here



53

00:03:48,650 --> 00:03:52,610

in order to save our image to a central storage.



54

00:03:52,610 --> 00:03:57,540

So the quiet space multiplied by 1.8 is less than remaining space.



55

00:03:57,540 --> 00:04:00,330

Otherwise what happens if this condition evaluates to false.



56

00:04:00,410 --> 00:04:06,620

What happens if the device is external storage doesn't have enough space in order to save the image.



57

00:04:06,620 --> 00:04:12,200

In that case we need to create an L statement so let's create an alpha statement here and open and close



58

00:04:12,440 --> 00:04:19,280

this whole statement by using this curly braces inside the curly braces of this Else statement I say



59

00:04:19,460 --> 00:04:25,270

fro new exception for an exception.



60

00:04:25,280 --> 00:04:27,230

And here we need to specify the message right.



61

00:04:27,230 --> 00:04:39,530

Just put two coats and here I can say there is no there is no enough space in order to save the image



62

00:04:39,530 --> 00:04:42,890

in order to save the image



63

00:04:46,130 --> 00:04:57,930

to external storage right semicolon let me create a new line here so that you can see these values better.



64

00:04:58,210 --> 00:05:03,230

So I actually of a front a new exception if this happens.



65

00:05:03,260 --> 00:05:06,230

So now let's go inside the statement here.



66

00:05:06,230 --> 00:05:15,710

So we are going to assume that the use of the user's device external storage has enough memory has enough



67

00:05:15,800 --> 00:05:17,950

storage in order to save that bitmap.



68

00:05:18,020 --> 00:05:25,770

I'm going to say because the operation of saving the image to external storage is going to be error



69

00:05:25,770 --> 00:05:26,580

prone.



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00:05:26,820 --> 00:05:27,950

OK.



71

00:05:28,020 --> 00:05:34,510

In that case we must actually put our code inside a try catch block so let's create a try catch block.



72

00:05:34,540 --> 00:05:40,420

So try and after the ending curly brace of the stripe like I need to say catch inside Apprentice's just



73

00:05:40,420 --> 00:05:41,290

they've been here.



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00:05:41,440 --> 00:05:47,670

Acception and the name of this prime it is going to be just open and closed this test played by using



75

00:05:47,670 --> 00:05:50,980

these curly braces inside this tetch black church.



76

00:05:51,000 --> 00:05:52,530

I can actually for a new exception.



77

00:05:52,530 --> 00:05:58,150

So here I can see fro new ARE YOU exception for are exception.



78

00:05:58,410 --> 00:06:03,810

I just put two coats here and Hitler can say that the operation went wrong.



79

00:06:03,840 --> 00:06:21,660

I can say that the operation the operation of saving the image to external storage when it's rank semicolon.



80

00:06:21,660 --> 00:06:23,630

So let me create a new line here.



81

00:06:23,700 --> 00:06:24,420

External.



82

00:06:24,420 --> 00:06:29,380

Actually let me create a line in order so that you can actually see these values better.



83

00:06:29,610 --> 00:06:32,690

So now let's go inside this try block here.



84

00:06:34,430 --> 00:06:40,850

In order to save our image in order to write our image to external storage we need to have an object



85

00:06:40,850 --> 00:06:42,730

of type file output stream.



86

00:06:42,740 --> 00:06:43,850

So let's create that here.



87

00:06:43,880 --> 00:06:49,760

Let's create a value of type file of output stream inside a double that are your package and the name



88

00:06:49,760 --> 00:06:55,970

of this rally but it's going to be five out with stream assignment operator new file output stream.



89

00:06:56,270 --> 00:07:00,680

And here as you can see if you need to pass the file name right.



90

00:07:00,800 --> 00:07:07,130

So I'm going to pass my fight here to this constructed of this final thoughts because I want to write



91

00:07:07,130 --> 00:07:13,850

my file to extend our storage so that's why I'm passing them my file here to this constructor.



92

00:07:13,850 --> 00:07:16,310

Now I can say boolean.



93

00:07:16,460 --> 00:07:18,470

Let's create a variable of a boolean.



94

00:07:18,560 --> 00:07:23,640

And here I can say is image saved successfully



95

00:07:26,150 --> 00:07:33,720

assignment operator now I'm going to refer to my peace map arguments that I receive from this safe while



96

00:07:33,750 --> 00:07:34,710

I'm here right.



97

00:07:35,590 --> 00:07:42,380

So I'm going to say bitmap does compress bitmapped that compress.



98

00:07:42,690 --> 00:07:46,450

And we need to pass some arguments to this.



99

00:07:46,500 --> 00:07:53,000

The first one is going to be actually the compressed format so I can say bitmapped that bitmap with



100

00:07:53,000 --> 00:07:58,820

chapter b right that compressed format that I told you that the format of our images that are going



101

00:07:58,820 --> 00:08:05,390

to be saved to external storage is going to be of the P.A. which was PND here bitmapped that compressed



102

00:08:05,390 --> 00:08:10,220

format that PNB the second argument is going to be the quality of the image.



103

00:08:10,400 --> 00:08:12,250

So the best quality is 100.



104

00:08:12,260 --> 00:08:15,310

But because we are here we are using the P.A. format.



105

00:08:15,320 --> 00:08:17,750

It doesnt really matter which value you use.



106

00:08:17,770 --> 00:08:18,330

OK.



107

00:08:18,590 --> 00:08:23,700

The P.A. format doesn't really care about the quality that we specify here.



108

00:08:23,780 --> 00:08:31,880

So we just passed a value 100 here because 100 is the best quality comma and the first argument here



109

00:08:32,480 --> 00:08:35,660

is going to be file output stream.



110

00:08:35,660 --> 00:08:43,970

So this object is going to actually write our image to external storage with these actually values.



111

00:08:43,970 --> 00:08:50,900

For example the Pinti and the quality 100 and this object is going to just right this image to extend



112

00:08:50,900 --> 00:08:54,260

our storage and the result of the Smurfette.



113

00:08:54,270 --> 00:09:02,300

If this operation is successful and if the image is returned to extend out of storage successfully The



114

00:09:02,300 --> 00:09:05,310

result is going to be true and its going to be assigned to this value.



115

00:09:05,310 --> 00:09:07,370

But is image safe to successfully.



116

00:09:07,370 --> 00:09:09,550

So let me create an if statement here.



117

00:09:09,560 --> 00:09:14,720

Let me first let me create a new line here so that you can see the entire code here.



118

00:09:14,780 --> 00:09:21,680

Now I'm going to actually create an if statement so if is image saved successfully I can often enclose



119

00:09:21,680 --> 00:09:24,190

this statement by using these curly braces.



120

00:09:24,320 --> 00:09:27,960

I can say return my flight.



121

00:09:27,980 --> 00:09:33,560

So this means that I can return to my file object from this method.



122

00:09:33,560 --> 00:09:36,910

Otherwise let's create an else statement else.



123

00:09:38,100 --> 00:09:40,570

I can create an else statement here right.



124

00:09:40,620 --> 00:09:42,370

I can throw an exception.



125

00:09:42,390 --> 00:09:53,160

I can see fro new exception for nucula exception and instead the apprentice I can specify the message.



126

00:09:53,170 --> 00:10:01,630

So here I can say the image the image is not saved is not safe.



127

00:10:02,380 --> 00:10:03,440

Successfully



128

00:10:07,100 --> 00:10:13,310

external storage external storage right semicolon.



129

00:10:13,710 --> 00:10:20,820

So let me create a new line here so that it is RMF it and it can see that we have no errors here.



130

00:10:20,910 --> 00:10:23,380

This is our fate that we're going to use later.



131

00:10:23,380 --> 00:10:29,250

So our main activity class in order to save the image that is taken by the user by using the camera



132

00:10:29,960 --> 00:10:32,060

to extend our storage.



133

00:10:32,490 --> 00:10:35,860

So let's see how we can use this class and this method.



134

00:10:36,250 --> 00:10:43,050

First we need to go to the Antrix manifest that exemplified here and we need to add another permission



135

00:10:43,050 --> 00:10:43,590

to this file.



136

00:10:43,580 --> 00:10:50,100

So below it is a permission that we added here I can actually open another tab and I can see the user's



137

00:10:50,310 --> 00:10:58,230

permission and I'm going to say you write external storage and it's self close this time.



138

00:10:58,250 --> 00:11:02,420

By using this by putting this dash and this closing tag here.



139

00:11:02,760 --> 00:11:06,840

So we are going to ask the user to allow us to access the external storage.



140

00:11:06,840 --> 00:11:11,380

And so when I say right this means that I can write and read.



141

00:11:11,790 --> 00:11:14,510

But we have the permission that that is actually read.



142

00:11:14,650 --> 00:11:16,140

Then Allosaurus really excellent.



143

00:11:16,140 --> 00:11:22,500

So this means that we can only read the external storage but right then all the storage permission means



144

00:11:22,500 --> 00:11:24,860

that we can read and write.



145

00:11:24,870 --> 00:11:30,980

So let's go to our main activity class and let's find the unclick Smurfette.



146

00:11:30,980 --> 00:11:32,800

So let me search for the anklets of.



147

00:11:32,830 --> 00:11:37,190

If you are using a match you just need to hold down the command channel and then press and then that



148

00:11:37,220 --> 00:11:38,300

if you keep both.



149

00:11:38,480 --> 00:11:43,400

And if you are using a Windows machine you just need to hold down the control on your keyboard and then



150

00:11:43,400 --> 00:11:48,250

press underlay that if key on your keyboard in order to search for a specific key word inside your file.



151

00:11:48,350 --> 00:11:50,290

So I'm going to search for and click.



152

00:11:50,390 --> 00:11:53,770

So he's going to find all the keywords with this value here.



153

00:11:53,770 --> 00:11:56,370

Unclear here that it's actually match this value.



154

00:11:56,390 --> 00:11:58,610

So the first one is viewed that Uncle listener.



155

00:11:58,790 --> 00:12:02,690

So in order to find the next result here you can see these arrows here.



156

00:12:02,690 --> 00:12:03,280

Right.



157

00:12:03,320 --> 00:12:08,710

So let's click on this than our next occurrence and here we have this one this one.



158

00:12:08,840 --> 00:12:11,810

And finally this one this is our uncle Meffert right.



159

00:12:11,960 --> 00:12:16,520

If you want to you can just write the entire and Mefford of the parameters also.



160

00:12:16,580 --> 00:12:18,320

So we have this uncle Mefford.



161

00:12:18,500 --> 00:12:24,230

And here we are saying that if they view that good ID is equal to or ID that here and take a picture



162

00:12:24,530 --> 00:12:26,130

then it's going to execute these codes here.



163

00:12:26,150 --> 00:12:27,080

Right.



164

00:12:27,080 --> 00:12:31,910

So what happens if the user clicks on these safe pictures so we created this LCS.



165

00:12:31,940 --> 00:12:38,060

They've been elusive view that good idea is equal to our idea that B.T. and see feature.



166

00:12:38,060 --> 00:12:42,710

So now let's go inside this LCF statement inside the curly braces of this elusive state and actually



167

00:12:43,250 --> 00:12:51,650

and here I can't say double meaning to ask the users to give us our runtime permission in order to access



168

00:12:51,650 --> 00:12:54,910

the external storage and to write the X then storage.



169

00:12:55,130 --> 00:13:00,410

So let's create about the level of that integer here and there the name of this rally is going to be



170

00:13:00,410 --> 00:13:03,180

permission check permission check.



171

00:13:03,220 --> 00:13:03,740

Right.



172

00:13:03,800 --> 00:13:12,350

Assignment operator and here I can say context compact that check self permission.



173

00:13:12,820 --> 00:13:15,870

So we need to first we need to pass the context right.



174

00:13:15,970 --> 00:13:24,860

So the contest is going to be main activity that this Kamo and the second value is going to be the actual



175

00:13:24,860 --> 00:13:25,830

permission right.



176

00:13:25,850 --> 00:13:29,490

So I can't say manifest that permission.



177

00:13:29,510 --> 00:13:30,530

That's right.



178

00:13:30,560 --> 00:13:32,290

External storage.



179

00:13:32,290 --> 00:13:33,260

Semicolon.



180

00:13:33,710 --> 00:13:34,280

Right.



181

00:13:34,310 --> 00:13:36,270

So this is our permission here.



182

00:13:36,410 --> 00:13:46,080

Now I can create an if statement so if permission check is equal to package manager that permission



183

00:13:46,110 --> 00:13:52,680

granted this means that the user has allowed this application to access the extent of the storage then



184

00:13:52,740 --> 00:14:00,160

only in that case we can actually write our code in order to save the image to external storage.



185

00:14:00,360 --> 00:14:06,110

But what happens if the user doesn't allow us to access the extent of the storage or the user hasn't



186

00:14:06,210 --> 00:14:08,680

allowed us to access the this and also this yet.



187

00:14:09,030 --> 00:14:16,000

In that case we want to ask the user to give us the access to permission to access the sin of storage.



188

00:14:16,050 --> 00:14:21,720

So as let's open this else they by using the curly braces on opening curly brace followed by a closing



189

00:14:21,720 --> 00:14:22,620

curly brace.



190

00:14:22,620 --> 00:14:31,870

And here I can ask to use there so I can just say activity Compaq's that request permission that request



191

00:14:32,270 --> 00:14:33,350

permissions.



192

00:14:33,650 --> 00:14:37,890

So first we need to pass the context so I can see main activity that is right.



193

00:14:37,920 --> 00:14:38,840

Comma.



194

00:14:39,170 --> 00:14:43,000

And I told you that we need to pass an army of permissions.



195

00:14:43,010 --> 00:14:45,740

Here you can see that here right an army of permission.



196

00:14:45,740 --> 00:14:49,450

So I can see new screen arii.



197

00:14:49,610 --> 00:14:56,280

So I just put the two curly braces here and instead the curly braces I can pass the permission so we



198

00:14:56,280 --> 00:14:58,210

only have one permission here.



199

00:14:58,290 --> 00:14:59,740

It is going to be manifest.



200

00:15:00,590 --> 00:15:04,490

Got permission that external storage.



201

00:15:04,480 --> 00:15:04,770

Right.



202

00:15:04,790 --> 00:15:05,260

Excellent.



203

00:15:05,260 --> 00:15:06,170

So that's right.



204

00:15:06,200 --> 00:15:06,750

Comma.



205

00:15:06,800 --> 00:15:08,550

Finally we need to pass the request code.



206

00:15:08,720 --> 00:15:12,950

The request must be a unique value so we can actually say 2000.



207

00:15:13,190 --> 00:15:13,660

Right.



208

00:15:13,670 --> 00:15:14,830

That's it.



209

00:15:14,870 --> 00:15:17,390

Now that we specified that request.



210

00:15:17,390 --> 00:15:21,060

Here let me create a new line here so that you can see this value better.



211

00:15:22,230 --> 00:15:25,880

Let's go inside this statement here that says that permission is granted.



212

00:15:25,890 --> 00:15:26,620

Right.



213

00:15:26,700 --> 00:15:33,660

I need to because I want to call this save the file Meffert of the Save for class and that if it is



214

00:15:33,660 --> 00:15:40,050

going to throw an exception we need to put our coats inside a try catch block right.



215

00:15:40,080 --> 00:15:42,650

Otherwise the compiler is going to complain.



216

00:15:42,870 --> 00:15:48,410

So just typing here try and after the adding curly brace of this try block.



217

00:15:48,420 --> 00:15:49,200

Just step in here.



218

00:15:49,210 --> 00:15:56,450

Cheche exception we just open and close to a catch block by using these curly braces and just like in



219

00:15:56,450 --> 00:15:56,620

here.



220

00:15:56,640 --> 00:16:01,760

Either print stack trace inside a try block here.



221

00:16:02,040 --> 00:16:03,630

So this print stack trace.



222

00:16:03,670 --> 00:16:09,020

If it is going to output some values to the LUGG if anything goes wrong inside this tribal I can say



223

00:16:09,280 --> 00:16:10,590

safe file.



224

00:16:10,610 --> 00:16:17,170

Class and because that Meffert they say fine if it inside the safety class is actually a static method



225

00:16:17,530 --> 00:16:20,460

I can directly call that Meffert on this class.



226

00:16:20,470 --> 00:16:27,380

I can say say that safelight need to pass some arguments to the Smurfette the first one is the activity



227

00:16:27,400 --> 00:16:27,890

right.



228

00:16:27,910 --> 00:16:30,960

So I can just say this right.



229

00:16:30,970 --> 00:16:36,130

All I can say main activity that is main activity that's this karma.



230

00:16:36,700 --> 00:16:40,990

The second argument is going to be bitmapped so I have an instance variable of that bitmap that holds



231

00:16:41,470 --> 00:16:46,180

the image that it's early days that is going to be taken by the use it by using the Chamitoff the device



232

00:16:46,250 --> 00:16:47,280

bitmap.



233

00:16:47,320 --> 00:16:55,450

So if this line here executes successfully This means that the image is saved to external storage successfully



234

00:16:55,450 --> 00:17:02,020

so if you are going to show a message a toast to the user that the image is now successfully say to



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extend our storage so I can say toast that make takes the first minute to pass the context main activity



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that this come on.



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The second argument is going to be the message to code so I can say the image is now successfully success



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fully saved.



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To extend our storage and here finally we need to specify the duration.



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So Len short thought show.



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Let me create a new line here.



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So you can see these post-mission message here.



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So that's it.



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Now it's time to run the application.



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And let's see what happens.



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So just choose one of these devices and then click on OK.



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So now you can see that our application is running on the simulator.



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Let's click on take a picture here.



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Let's take a picture let's accepted let's now let's change these settings here.



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For example this color or blue color.



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And let's click on Save the picture.



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Now it says allow app to access photos media and files on your device.



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Yes.



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We need to click on this button again save that picture.



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Now it says the image is now successfully saved to external storage.



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But it you don't have to find the image in extend all the storage here.



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It's important to know that the image is saved to external storage.



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But if you want to find that image it's better to test this up on your actual device.



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So in fact I'm going to test it on my dogs and I'm going to show you how we can find the image on your



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actual device.



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So let me just stop the program.



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Let me run the app again.



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Now this thing I'm going to actually choose my device.



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Let's click on OK.



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So he's going to now run the app on my actual device.



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But now the app is running on my actual device and I'm going to take a picture first.



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I'm going to allow the permission and take your picture and then I'm going to just save the picture.



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So it says we are going to access the directories.



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Yes save the picture.



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Now it says the image is saved to X and I'll sort of success with it.



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So in order to find this image if you're using your actual device you need to have a file explorer or



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for example some software that allow you to explore your files in Android such as file explorer or any



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other apps.



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I just need to open my file file manager right.



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And then I need to go to the actually the Android we have a folder here called Android open it and we



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have a folder called data.



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Just open it and then you can actually find the package of your application.



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So the package of our application is this one right for me is that example that monitors I saw that



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the color app.



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So I need to find this package here inside this data folder.



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So let me find it here.



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So I found it and insert is a folder we have a folder called files.



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If I open it I can see some actually some folders here.



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So I can open them and then I can see my images here.



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So again it's not necessary to find your images in your external storage or in the previous tutorials



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of this course I talked about accessing our images and how to save all the magistrates out of storage



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and how to get images from an accident on the search.



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But in this application it is not very important.



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We just need to be sure that this image is safe to extend.



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So that's it.



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So we added this functionality to this application.



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Right.



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But it's not complete enough.



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We want to share this image to other users.



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Let's see how we can do that.



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We've got to share this image actually with other apps such as e-mail or any other actually app applications



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that can interact with other people such as messaging app such as whatsapp telegram or any other applications



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or e-mail G-mail.



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And then the next tutorial we're going to add that functionality to us to go out to our application.



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Thank you very much for watching.



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If you have any questions about the concepts that I taught you in this lesson please post the discussion



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in the course and then I'll do my best to answer all of your questions.