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So here inside this article Mefford Let's actually create an if statement so if and then say The Apprentice



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is just typing.



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Here is storage.



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Permission granted.



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OK.



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I actually referred to the name of the Smurfette and then let's actually open and closed this if statement



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by using these curly braces and opening curly brace followed by our closing curly brace.



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So as you can see here I just created an if statement and here I'm saying that if it's stored it's permission



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Grant Granted if the user has access actually if the user is allowed to access the storage then we can



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actually execute the lines of code that are going to be inside this if statement.



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OK.



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So I told you that it is very important that you specify whether the user is actually allowed to access



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the storage or not.



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Right.



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So here we are actually asking that permission.



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So now inside this if statement I'm going to paste in some lines of code and then I'm going to explain



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to you what's going on here.



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



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So let's actually look at this line of code here in line number one hundred and fifty six.



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So here I actually referred to the name of this at a least file pathnames.



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Right.



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And then I put an assignment operator here and then I put the new keyword and an endless in here.



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So here I am actually creating an empty arii that actually that can actually hold values of types 3.



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Right.



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So I actually initialized this at a file pathnames.



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OK.



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These are a list and then as you can see inside the angle brackets I specified that the values that



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are going to be assigned to this flight path names here can only be of types 3.



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And then in line number of 157 as you can see I created actually a variable of type fight.



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Right.



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So remember that I told you variabilis are placeholders that can actually hold the values of a specific



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type.



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So here when I actually just put this Q-Bot here filed with capital F here I am specifying that the



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values that are going to be assigned to this variable are going to be of type file.



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So file file path.



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So the name of this variable is flightpath which is actually like Foyt right.



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



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So here I want to actually create an object of type find and I want to assign that object to this file



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path.



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So new file here I want to create an object of type find and an inside the apprentice's as you can see



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here.



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First of all I need to specify a directory environment that get external storage public directories



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so here we need to specify that up which path you want to access able to access the external storage



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public directory.



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OK the public directed that can be accessed by the user.



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So and that inside the apprentice is here first of all I specified that I'm on to access the pictures



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directory so environment that directs to the underlying pictures.



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Now let me show you the Android device monitor as you can see here.



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This is our Android device monitor and inside this emulated there inside this fall there is zero.



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As you can see we have these pictures here pictures folder.



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So here I am accessing these pictures there.



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And then here as you can see for this second argument here I am actually specifying the name of the



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folder that are able to access.



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So as you can see here inside this is the directory we have this for all their animal images.



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Right.



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So I want I need to actually specify the exact name of that folder.



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So as you can see the exact name is animal images.



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So I just put this value here.



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Animal images are right inside the goats.



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And now with this foil Pamphila have now actually contains the address of these animal images they're



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inside the directory say the pictures directory.



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Right.



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And then here as you can see we have another IIF statement.



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So if file path.



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So here I am referring to is a variable that holds the the address of these animal images folder.



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So a file path that is directory.



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So it is if it is actually a directory.



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So as you can see here inside this Android device monitor here we are accessing the pictures directory



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right.



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So it is actually a directory.



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Here we are checking that.



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It is actually a directory or not.



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Right.



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If flightpath that is directory at as you can see here you can see these and logical operator.



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And if these file path is not equal to null.



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OK.



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If this file path is not equal to or not and if it is actually our real directory that we can access



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in that case we're going to go ahead inside the curly braces of this if statement and we're going to



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execute the lines of code here.



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First of all inside this statement as you can see I actually referred to these files right here.



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So as you can see I actually created these files are a.



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Here there's actually the scroll to the top.



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I actually created this at a file here in line number 62.



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I just declare this.



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I looked at a here and there is.



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Let's actually go inside our Smurfette on click here.



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I am actually initializing these arii.



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So fi's assignment operator flightpath.



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So here I am actually failing to find power here which is of type file.



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Right.



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That list files.



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So here I am actually getting the images that are inside of these that are inside of this folder.



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Animal images.



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These are actually files as you can see here right with the P.A. format.



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So now I actually created a file is great and here are going to actually get at least FAE's least files



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means.



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These are actually images these files that are inside these animal images by actually calling the Smurf



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at least Foyles we can access these files that are inside of this folder and we can actually assigned



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these files to these files.



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Great.



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So now these are a files actually holds these files here that are inside of these animal images.



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And then here we actually created a for loop here.



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So for each index is actually equal to zero.



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So here initially I actually created a body of type integer and then I assigned the value zero to the



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index.



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And here I am specifying that if that does follow up here is going to be executed until the value of



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this index is less than the value of the length of these flights.



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Right.



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And then here I am specifying that if after each execution of this for loop we're going to actually



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add one value to the index variable.



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So let's actually go inside this for a loop here and let's see what's going on here.



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As you can see in line number of sixty five I actually referred to the name of this at a here file path



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names as you can see this is actually an alias right file path names dot at.



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So here I want to add some files to this file pathnames which is actually an Aurelia's.



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And as you can see here I just referred to the name of this at a Foy's sub index.



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So I want to get the specific value that is inside of the specific index of this tree that gets absolute



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path and in this way we can actually get the absolute path of these files that are inside of these animal



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images.



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Right.



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So here because we want to actually show these images through the user it is very important that we



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actually access the absolute path of these files.



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Right.



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So that's why we actually created this for loop in order to access or in order to get the absolute path



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and then to actually assign that absolute path to this file pathnames Aurelia's.



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So file pathnames that add.



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And then I refer to the name of this Aure sub index dot get absolute path.



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So for example initially the value of this index variable is zero.



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So Foyle's sub zero as you can see here is when I try to go inside of this at a Foyle's and it's going



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to actually get the first value that is inside of the index zero of this era.



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And it's going to call this method and that's why you get absolute path.



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So for example the absolute path of these imit image bear.



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So this bear is inside of the index zero of this at a.



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And then it's going to actually add that value to this Aurelia's file pathnames.



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And it's going to continue executing this for loop until it reaches to the last image right Tiger that



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PAGG.



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So now as you can see after the end uncurl curly brace of this if statement.



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Now I'm going to actually pasting some more lines of code here inside this if statement is stored is



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Permission granted and when actually pasting some lines of code here and then I'm going to explain to



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you what's going on here.



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So as you can see here these are the lines of code that I pasted here and now I'm going to explain to



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you what's going on here.



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Exactly.



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So here we have a for loop right.



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And initially as you can see we created a variable of type integer and the name of this variable is



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index.



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And then I assigned the values zero to this variable right index.



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And then here we actually created a condition that determines how many times this for loop is going



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to be executed.



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So this for a loop here is going to be executed until the value of this index is actually less than



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the value of the size of this file path names are a list.



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Right.



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So here we as you can see this is actually an Aurelie slight file pathnames that size and this for loop



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here is going to be executed until the value of this index is actually less than the size of this Aurelia's



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file pathnames.



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And then here if you are saying that after each execution of this for loop it's going to actually execute



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this is going to actually add one value to the value of this index variable.



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So now let's actually go inside the curly braces of this for a loop and let's see what's going on here



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in line number 172 as you can see we have actually a final variable which is of type image view.



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Right.



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So here we have a final which is actually a constant right image view and the name of this rowdier bill



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is in his view.



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And then I put an assignment operator here and as you can see I am actually creating a new object of



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type image view here.



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And I want to actually assign that object to this variable which is a fine image view right.



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So assignment operator new image view.



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And here for the for the argument of these constructor as you can see here we need to pass this context



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main activity that this and then here I referred to the name of this object image view that said E-Myth



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you are.



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OK.



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Image view that set image you are.



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And inside Apprentice's as you can see I refered to the name of this class.



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You are.



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That parts I want to actually parse something right.



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So inside Apprentice's I need to specify the value that I want to parse.



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Right.



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Right.



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So you or I that parse file pathnames Slahi it as you can see it is this Aurelia's the file pathnames



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actually contains these files these images.



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So now let me show you the.



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The Android device monitor.



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So just click on Tools Android Android device monitor.



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So now let's actually wait and let's see our Android device monitor here.



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So inside these thought this folder inside is emulated.



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And inside is a folder zero as you can see if you have these pictures directory right inside these pictures



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directory as you can see we have these animal images folder and inside this animal images folder we



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have these images.



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Right.



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So these are the files that are actually inside of this file path names are a list.



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So I want to actually parse these addresses these Foy's and I want to actually assign them.



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I want to actually set that image that specific image to image view as you can see after each execution



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of this for loop you are actually creating our actually an image view.



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Right.



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Every time this fall here is actually is executed an image is actually created.



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And as you can see here these lines of code here is going to be executed every time this full loop is



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executed.



196

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Right.



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So for the first time that this is executed the value of this index is zero.



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Right.



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And it's going to actually look at this line of code here.



200

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You are either parce file pathnames So this is an early release that actually contains these images.



201

00:13:00,540 --> 00:13:01,280

Right.



202

00:13:01,320 --> 00:13:02,230

That's good.



203

00:13:02,250 --> 00:13:08,980

So if you want to get some value and we need to pass the index of that specific value so index the index



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is zero initially right.



205

00:13:10,200 --> 00:13:15,570

So it's going to actually get the beer as you can see here the beer here and it's going to actually



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00:13:15,810 --> 00:13:19,590

set that beer image to this image here.



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00:13:19,590 --> 00:13:25,870

So in order to actually parse that specific image that we have inside the SD card we need to actually



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00:13:25,890 --> 00:13:32,010

use the image you or I used this method in order to access the images that are inside of your SD card.



209

00:13:32,130 --> 00:13:33,380

So that image you or I.



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00:13:33,480 --> 00:13:39,290

You are either part file pathnames that get index right an image view.



211

00:13:39,330 --> 00:13:44,020

Let's look at this line of code here 174 image view that sets labeled products.



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00:13:44,130 --> 00:13:50,250

And here you are specifying the layout problems that and the height of our image.



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00:13:50,480 --> 00:13:55,940

OK so image view that certainly out perhaps new linearly out.



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So remember that I told you when you are specifying the layout problems inside the pantheists you must



215

00:14:02,580 --> 00:14:06,070

specify the parent of your image view.



216

00:14:06,150 --> 00:14:11,160

So our image view is going to be inside our linear layout.



217

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Right so that's why this linearly out here is the palette.



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So new linearly out that lay out plot arms and for the width I assign the value of five hundred and



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for the height I assigned to the value 500.



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Right.



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00:14:26,520 --> 00:14:29,830

So it is going to be there width and the height of our image view.



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So here it is very important that you specify the parent of your image view.



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Right.



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So now let me show you the emulator as you me I actually opened the app for free.



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Now let me actually click on this button here.



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Allow access pictures in the cart as you can see.



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You can see these images right.



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So these images are actually inside a horizontal linearly out right.



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So because these images are actually inside the horizontal linear layout it is very important that you



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know that the parent of these image views as you can see here are actually inside or actually are linearly



231

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out like a linearly or horizontally.



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So that's why I said linear out that lay out perhaps.



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And I specified the beach at the height of my image view and now as you can see in line number 176 I



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created another constant which is of that integer.



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So final point and here I actually named this valuable as actually.



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And then I assigned to this index to this already.



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So here we actually get this index from this for loop.



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Right.



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So I actually assigned this index to this I.



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So now because I want to actually use these index inside are anonymous in a class.



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I need to I actually must provide an order constant in order to actually get the value of this index



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because I cannot access the value of this index in inside this anonymous class.



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So let's just actually look at these lines of code here and then it will make sense.



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So here as you can see I am actually referring to the name of this variable image view right which is



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of image view image view that said Uncle Clisson or so I am actually providing a lesson there for these



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images in his views.



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So for example when the user clicks and is cow here as he can see an image is appearing here right.



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So I am actually creating a listener for this image we use here so that something happens when the user



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clicks on these images.



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So now let's actually go back to our Android studio.



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So here as you can see image view that said Uncle listener new view that unclick listening.



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And as you can see here I am actually creating an anonymous inner class that actually is implant is



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implementing this uncle because an interface.



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And as a result this anonymous class must actually provide an implementation for this uncle Merfeld



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that we have inside this uncle class in an interface.



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So that's why you can see we're actually overwriting this method here.



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So Pablito void unclick view.



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And then inside the Smurfette as you can see I actually fear to this image to each other object.



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Right.



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So if I actually scroll to the top here as you can see we actually declared this variable which is of



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type image switcher as you can see here and the name of this variable is image creature and it inside



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these uncreate Smurfette you actually initialized this image.



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So each hour here in line number one hundred fifty six.



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So Image Sutor.



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Assignment operator and then here I am casting this image so we show to our imagery to object find view



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ID or ID that image switcher and that he and as you can see I am setting up a factory image suture that



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says back to the main activity that this and we must do this in order to create an animation as you



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can see here.



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So Image Tsui shirt that said animation.



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And here I am setting the animation as you can see here Art.



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And in that slide in lift and here set in animation right and then he in line number 143 here I am sitting



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there set out animation.



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So this happens when the image is going to be disappeared from the front the screen.



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Right.



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Image switcher that set out animation animation.



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That looked animation.



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And for the first argument I passed this human activity that this and for the second argument I passed



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this value Android that are that.



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And in that light out.



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Right.



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And then here inside our undercarriage method as you can see let's actually scroll to the top here.



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Inside our uncle Meffert inside this uncreate Smurfette as you can see here.



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As you can see here I am actually said the image you are on to this image switcher because you want



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to put the image we use inside.



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I want to actually put I want to show the imagery inside our image through it.



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So when the user clicks on this for example image or cat as you can see a cat appears here.



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Here we have an image switcher.



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Right.



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And here we have a horizontal linearly out that actually contains images image views of these animals.



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As you can see here.



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So image that set image you are right.



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So whenever the user clicks on these images as you can see here for example this appeared this unclear



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if it here is going to be executed image through it.



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That said as you are again we are parsing this image from the from the SD card.



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So we need to use the image set image you RMF it.



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So you are either to parse file pathnames.



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Here I am referring to the name of.



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These are a list file pathnames that get the image that it is that is inside of the index.



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So now you understand why we actually created this constant here which is of type Integer.



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I created this constant here because of that integer.



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And then I assigned this index here to this.



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Because we cannot actually access a variable outside of this uncle if it is Uncle method here needs



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to actually access a constant not valuable.



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So that's why we created a constant here and then we actually assigned this index to this.



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And here inside is anonymous in a class we can actually get the value of this ID right.



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As you can see file pathnames that gets by.



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And that's why you can see that when I click on this image image views as you can see here the specific



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image is actually appearing here.



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And finally after the ending curly brace or after the end in practice of this satanically listen and



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Minford as you can see here I am actually I think that image is linearly held horizontally that view



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image view right here we are saying that if that image is actually clicked then it's going to put that



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image inside this image through each other.



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But we must actually put this line of code here before the end in curly brace of this for a loop so



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that when ever that this fall if he's executed our image views are actually appearing here right on



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the image views are appeared here.



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One by one you can see these images one by one here.



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So I am actually we must actually put this line of code here linearly and horizontal.



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Here I am referring to the linearly are horizontal.



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That is the parent of these image views as you can see here.



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And then here I am adding this image to this linearly or horizontal.



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So that's why you can see that these image views are inside of this linearly horizontally.



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We must add them in here to this linearly outhaul is on.



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Right.



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So I think that's actually did on our project here.



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And let's see what happens.



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As you can see here at the port at the bottom we have this error.



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00:21:47,120 --> 00:21:50,600

So we must close the Android device monitor first.



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Let's run our project again.



329

00:21:53,250 --> 00:21:56,760

So as you can see here our application is actually to restarted.



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00:21:57,140 --> 00:22:06,020

And now let's actually close this application let's run our project again.



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00:22:06,090 --> 00:22:09,760

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



332

00:22:09,810 --> 00:22:15,000

Now let me make this virtual keyboard keyboard he had disappeared.



333

00:22:15,100 --> 00:22:16,210

Let me scroll down here.



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00:22:16,260 --> 00:22:19,790

Let's actually click on the spot and allow access pictures in SD card.



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00:22:19,860 --> 00:22:24,580

And now you can I see this you can actually see that we have this image we use Enceladus linearly out



336

00:22:24,580 --> 00:22:25,440

horizontal.



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00:22:25,470 --> 00:22:30,930

And if I actually click on one of these image views here as you can see we can see this image view inside



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00:22:30,930 --> 00:22:32,590

this image suture.



339

00:22:32,610 --> 00:22:33,410

Right.



340

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You can see the actually the animation slide in and slide out.



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So I think that's enough for this application.



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And if you have any question as regards these concepts that I taught you in this in these tutorials



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00:22:48,600 --> 00:22:53,360

please post the discussion in the course and then I do my best to answer all of your questions.



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