1 00:00:00,240 --> 00:00:04,710 Hire one so that it is literally all you're going to go ahead and we're going to go inside these update 2 00:00:04,710 --> 00:00:10,980 martial our activity class and we're going to actually put some logic's here inside this unclear method. 3 00:00:11,280 --> 00:00:17,820 So first of all in order to identify the martial art object that is actually being updated updated or 4 00:00:17,820 --> 00:00:24,120 being modified We need to have the ID of that specific martial art object. 5 00:00:24,120 --> 00:00:27,790 So let me show you this method here and modify user interface method. 6 00:00:27,800 --> 00:00:31,510 Inside is of the activity of the martial activity class. 7 00:00:31,700 --> 00:00:39,300 Here inside this method you can see that when I created the button for each row actually for each object 8 00:00:39,300 --> 00:00:46,440 in order to mollify or updates that button I said that the ID of that button is the same ID of that 9 00:00:46,440 --> 00:00:49,350 martial art object right here. 10 00:00:49,410 --> 00:00:51,010 So let's scroll down here. 11 00:00:51,140 --> 00:00:54,190 You can see this method here Uncle Meffert right. 12 00:00:54,210 --> 00:01:00,840 Look at this argument here view which is of the view this argument is actually the button that is being 13 00:01:00,900 --> 00:01:02,240 interactive. 14 00:01:02,400 --> 00:01:03,540 Right. 15 00:01:03,540 --> 00:01:10,380 So remember that button is a subclass of view and you can see this argument is the use for user interface 16 00:01:10,380 --> 00:01:16,050 components that is being triggered when the user is actually just interacting with that button. 17 00:01:16,050 --> 00:01:18,890 So this view is the same as that button. 18 00:01:18,900 --> 00:01:23,790 So this means that if I get the idea of this view this means that I am actually getting the ID of that 19 00:01:24,060 --> 00:01:26,160 martial art object. 20 00:01:26,160 --> 00:01:28,210 So let's create a variable of that integer. 21 00:01:28,440 --> 00:01:33,710 And here I can say martial arts martial art object. 22 00:01:33,850 --> 00:01:36,380 The assignment operator view. 23 00:01:36,480 --> 00:01:37,940 I am referring to these arguments right. 24 00:01:38,020 --> 00:01:40,820 That gets I-T semi-colon. 25 00:01:40,830 --> 00:01:47,970 So in this way we can access the ID of the Marshal object that is being actually updated that is being 26 00:01:48,720 --> 00:01:49,580 modified. 27 00:01:51,420 --> 00:01:59,610 Now we need to also have access to the value of the edit texts that we have for each marshal or object 28 00:01:59,610 --> 00:02:04,470 so for each martial art object you're going to have an edit text for the name and edit text for the 29 00:02:04,470 --> 00:02:09,750 price of a martial art and another in it a distaste for the color of that martial art. 30 00:02:09,750 --> 00:02:15,930 So here inside this modify user interface Smurfette you can see that when I created these edit text 31 00:02:15,990 --> 00:02:23,690 here you can see that for the ID of each editor you can see that I actually accessed the ID of the monster 32 00:02:23,760 --> 00:02:29,330 object for example for this one and I and I added about your number 10 to that value or I access them 33 00:02:29,400 --> 00:02:36,660 a marshal ID of the of this object here for this second edit takes which is going to be for the price 34 00:02:36,660 --> 00:02:37,480 of the text right. 35 00:02:37,530 --> 00:02:42,200 And I did a de-value number 22 that ID or for example this one. 36 00:02:42,420 --> 00:02:49,980 So now I can easily access or edit texts inside our row so I can't say for example it edit text I can 37 00:02:49,980 --> 00:02:54,330 create a variable of the text and the name of this editor is EDT. 38 00:02:54,630 --> 00:02:56,330 EDT marshal Anthony EDT. 39 00:02:56,790 --> 00:02:57,860 Martial arts. 40 00:02:59,560 --> 00:03:10,580 N assignment operator and I can say first I need to cestus object to an added text object find view 41 00:03:10,580 --> 00:03:16,810 by id and here in order to access the ID of that martial art. 42 00:03:16,820 --> 00:03:18,250 Actually of that it takes. 43 00:03:18,260 --> 00:03:21,210 That is for the name of that martial art. 44 00:03:21,230 --> 00:03:22,680 We have this idea here right. 45 00:03:22,760 --> 00:03:28,390 So I can say martial art object id plus 10 right. 46 00:03:28,490 --> 00:03:34,520 This ID is exactly the same ID that I specified he had in say this modify use an interface method. 47 00:03:34,640 --> 00:03:37,320 When I wanted to specify an ID for this. 48 00:03:37,320 --> 00:03:42,070 Actually for this ID text for the name the text we can see that here in this number zero. 49 00:03:42,470 --> 00:03:46,000 So in order to access the other additives I can actually do the same here. 50 00:03:46,010 --> 00:03:50,960 So he said his uncle Meffert and below this line of quote I can create another rowdier text. 51 00:03:51,260 --> 00:03:52,910 EDT martial arts. 52 00:03:52,910 --> 00:03:55,290 Price is martial art. 53 00:03:55,290 --> 00:04:01,640 Price assignment operator and I can actually cast this object to it takes the object find view by ID 54 00:04:02,090 --> 00:04:08,920 and an inside Apprentice's just type in here marshal not object id plus 20 right semicolon. 55 00:04:09,350 --> 00:04:11,680 Again create another edit text. 56 00:04:12,380 --> 00:04:22,180 So this time marshal EDT martial arts color so EDT martial arts color assignment operator and let's 57 00:04:22,180 --> 00:04:25,170 cast this object to an editing object. 58 00:04:25,180 --> 00:04:27,010 So here let me put it here. 59 00:04:27,460 --> 00:04:28,610 Let's put up her Apprentice's. 60 00:04:28,630 --> 00:04:33,430 It takes fine view of the martial art object already. 61 00:04:33,510 --> 00:04:37,000 Plus first the semicolon. 62 00:04:37,200 --> 00:04:45,270 So now that we have access to these texts I can access the string value of each edit text so I can create 63 00:04:45,270 --> 00:04:54,490 a variable of type string here and I can say marshal that name string Raddy martial arts name streambed 64 00:04:55,270 --> 00:04:57,330 value assignment operator. 65 00:04:57,340 --> 00:05:05,610 I can access this EDT martial art name that get text get text to string semicolon. 66 00:05:05,890 --> 00:05:07,970 Let's create another variable of types. 67 00:05:07,990 --> 00:05:10,830 So it's three and martial art. 68 00:05:11,020 --> 00:05:12,710 Price string value of martial art 69 00:05:15,890 --> 00:05:18,410 price street value 70 00:05:22,050 --> 00:05:30,620 assignment operator and here I can refer to this EDT Marshall Price that it takes the two strange semicolon. 71 00:05:30,960 --> 00:05:38,010 Again let's create another variable of type screen and its name is martial art color string value martial 72 00:05:38,010 --> 00:05:47,980 arts color screen value streambed value assignment operator anything martial art color that get text 73 00:05:48,470 --> 00:05:50,690 that string semicolon. 74 00:05:50,860 --> 00:05:51,650 Right. 75 00:05:51,760 --> 00:05:59,380 So now that we have access to these city values of this editor access now I can't say so I can't refer 76 00:05:59,380 --> 00:06:07,270 to that database handler reference to this instance that modify I can access this method modify Monstro 77 00:06:07,270 --> 00:06:09,390 not object here. 78 00:06:09,400 --> 00:06:14,410 So here we need to pass the id the martial art name the price and the color. 79 00:06:14,440 --> 00:06:19,140 So we have the ID which is going to be off that interior light and the martial art name is of types 80 00:06:19,140 --> 00:06:19,720 screen. 81 00:06:20,050 --> 00:06:24,600 The martial art prices of type double and the martial art colors of types. 82 00:06:24,640 --> 00:06:30,760 So let's first pass the martial art ID so I can say martial object id come on. 83 00:06:30,960 --> 00:06:33,260 I need to pass the martial art name right. 84 00:06:33,340 --> 00:06:34,450 So I can access. 85 00:06:34,450 --> 00:06:39,970 I can have I have access to that much with that name string value so I can say martial art name street 86 00:06:40,000 --> 00:06:41,560 value karma. 87 00:06:41,920 --> 00:06:45,160 So here we need to pass the martial art price. 88 00:06:45,220 --> 00:06:46,250 It is of type string. 89 00:06:46,270 --> 00:06:49,570 But I'm going to solve it in a moment so for not just pass this value. 90 00:06:49,570 --> 00:06:53,600 Martial art actually priced sitting by the comma. 91 00:06:54,010 --> 00:06:58,930 And finally we need to pass the color so much of that color to city value which is again of types doing 92 00:06:58,960 --> 00:07:02,860 martial art color string value right. 93 00:07:02,930 --> 00:07:03,830 But we have an error. 94 00:07:03,830 --> 00:07:07,080 So let me create a new line here so that you can see these values better. 95 00:07:07,130 --> 00:07:08,440 And let me put it here. 96 00:07:08,770 --> 00:07:09,750 And this one here. 97 00:07:09,920 --> 00:07:14,960 So first we pass them onto the object id which is of that integer and it is a teacher. 98 00:07:15,110 --> 00:07:18,320 And then we passed the marshal named value it is OK. 99 00:07:18,620 --> 00:07:21,980 And here we have a problem Marshall Price string value. 100 00:07:22,190 --> 00:07:26,910 We need to somehow convert this thing about to an integer value. 101 00:07:27,140 --> 00:07:32,190 But in order to do that and use it for example may until later. 102 00:07:32,220 --> 00:07:35,950 Ok for example they use an end to the letter A in the edit text. 103 00:07:35,960 --> 00:07:39,170 So in that case our application is going to crash. 104 00:07:39,170 --> 00:07:45,260 We need to have a tri touch block in order to catch the number format exception so that our application 105 00:07:45,290 --> 00:07:51,050 is not going to crash or we can actually do for example in the catch block we can create a Toastmasters 106 00:07:51,380 --> 00:07:56,990 and we can let the use of know that the value that is going to be entered inside that specific edit 107 00:07:56,990 --> 00:08:01,120 text must be actually a numeric value not a string value. 108 00:08:01,310 --> 00:08:02,800 For example a letter. 109 00:08:02,810 --> 00:08:06,930 So now here let's create a to each block. 110 00:08:06,930 --> 00:08:08,150 Here is Troy. 111 00:08:08,570 --> 00:08:13,520 Open and close the strobe light by using the curly braces after the end in curly brace of the Triple 112 00:08:13,520 --> 00:08:14,460 X just a bit here. 113 00:08:14,460 --> 00:08:17,340 Cheche inside the prentices of this church plug. 114 00:08:17,350 --> 00:08:21,830 Here I can specify the type of the exception which is going to be number format. 115 00:08:21,840 --> 00:08:22,880 Exception. 116 00:08:23,030 --> 00:08:28,390 This is the name of this actually the argument and just open and close this test by using curly braces. 117 00:08:28,430 --> 00:08:29,600 Look at this here. 118 00:08:29,600 --> 00:08:32,840 This method calling here databus handler that modify motional object. 119 00:08:32,840 --> 00:08:38,010 Let's cut the Smurfette here and put it here inside this try block. 120 00:08:38,390 --> 00:08:44,900 But first here before calling this method a modified Marshall object on this database handler reference. 121 00:08:45,080 --> 00:08:50,990 First let's create a variable of type double so double and the name of this variable is going to be 122 00:08:51,050 --> 00:08:52,510 martial art. 123 00:08:52,850 --> 00:09:00,740 Art price double value double value assignment operator. 124 00:09:00,840 --> 00:09:07,770 And here I can refer to this double class that parse double that parse double and I just need to pass 125 00:09:07,830 --> 00:09:12,420 a string value to this method and it's going to convert that value to a double value so that we can 126 00:09:12,420 --> 00:09:13,720 assign it to this variable. 127 00:09:13,980 --> 00:09:19,210 So I can pass this martial art a price string value here. 128 00:09:19,320 --> 00:09:21,720 And finally I just need to put a semicolon at the end of my statement. 129 00:09:21,720 --> 00:09:27,900 So let me create a new line here and here instead of passing marshal price string value to the Smurfette 130 00:09:28,230 --> 00:09:30,870 I just need to pass Marshall Price double value. 131 00:09:30,900 --> 00:09:36,030 So I just need to delete this value and I can say Marshall Price WIOD you that's it. 132 00:09:36,030 --> 00:09:37,740 Now we have no errors here. 133 00:09:37,950 --> 00:09:38,780 Right. 134 00:09:38,790 --> 00:09:40,670 So let's run our application. 135 00:09:40,690 --> 00:09:46,830 But but before that let's make sure that we have actually created an intent inside our main activity 136 00:09:46,830 --> 00:09:54,450 class for this update marshal that activity class so let's go to the main activity class here. 137 00:09:55,420 --> 00:10:02,190 So here is an option item selected Meffert you can see that we have a case for tab at Marshal activity 138 00:10:02,200 --> 00:10:04,200 we have a case for the delit marshal activity. 139 00:10:04,210 --> 00:10:06,510 So we need to create another case here. 140 00:10:06,680 --> 00:10:10,150 Inside is an options item selected inside this main activity class. 141 00:10:10,150 --> 00:10:17,320 So here is just say in case our That ID that update just opened here. 142 00:10:17,350 --> 00:10:18,610 Update marshal. 143 00:10:18,790 --> 00:10:20,000 OK Colin. 144 00:10:20,250 --> 00:10:22,300 So this is this update Monserrat item. 145 00:10:22,320 --> 00:10:26,780 If they use that actually presses this item you are going to create a new intent. 146 00:10:26,790 --> 00:10:38,240 Intent and the name of this intent is going to be actually update martial art the intent assignment 147 00:10:38,250 --> 00:10:43,020 operator new intent and I just need to pass the context. 148 00:10:43,040 --> 00:10:49,460 So I activity that this and for and for the second argument 10:22 activity that we're going to transition 149 00:10:49,460 --> 00:10:51,460 to you're going to move to actually. 150 00:10:51,500 --> 00:10:56,890 So the second activity is going to be update martial art activity that class. 151 00:10:56,900 --> 00:11:02,450 So let me put a semicolon at the end of my statement and then let me create a new line here. 152 00:11:03,140 --> 00:11:10,640 So after this line of code I can actually say start activity and I can't say update marshal activity 153 00:11:10,700 --> 00:11:12,380 intent. 154 00:11:12,430 --> 00:11:18,600 Finally I need to return true for this case or return to suddenly column. 155 00:11:18,920 --> 00:11:21,450 So let's learn our application now. 156 00:11:22,630 --> 00:11:25,320 Let's actually select one of these devices here. 157 00:11:25,510 --> 00:11:26,290 For example this one. 158 00:11:26,290 --> 00:11:27,580 And then click on OK. 159 00:11:27,970 --> 00:11:32,110 So here you can see that our application is running on this emulator here. 160 00:11:32,380 --> 00:11:36,440 So let's actually click on these ellipses a button here this dropdown menu. 161 00:11:36,700 --> 00:11:39,360 So here you can see that we have these items. 162 00:11:39,360 --> 00:11:43,130 So let's click on update the martial arts id.. 163 00:11:43,150 --> 00:11:45,110 Now we transitioned to this activity. 164 00:11:45,250 --> 00:11:51,960 So you can see that we have the ID of these martial take is now seven the name. 165 00:11:51,970 --> 00:11:53,170 And you can see it there. 166 00:11:53,230 --> 00:11:56,580 Actually the price this is the color here. 167 00:11:56,830 --> 00:12:00,070 And finally we have this button here modified. 168 00:12:00,370 --> 00:12:01,230 Right. 169 00:12:01,390 --> 00:12:02,100 So. 170 00:12:02,440 --> 00:12:07,580 So you can see that we cannot actually see the entire text of the spot in here. 171 00:12:07,600 --> 00:12:11,990 This button doesn't have enough space to be seen actually on the screen here. 172 00:12:12,160 --> 00:12:16,220 So let's go back to Andrex studio and then let's go to this update. 173 00:12:16,230 --> 00:12:18,490 Martial art activity class here. 174 00:12:18,490 --> 00:12:24,230 So inside this class Let's go to this actually Smurfette modify user interface Smurfette. 175 00:12:24,430 --> 00:12:30,190 And inside this for loop we have a for loop here right inside this wall of where we actually at these 176 00:12:30,190 --> 00:12:33,430 user interface components to the grid play out here. 177 00:12:33,730 --> 00:12:38,250 Let's change the width of these user interface components. 178 00:12:38,260 --> 00:12:45,100 So here I want to tell you that for these I-T takes view here I told you that it is going to actually 179 00:12:45,100 --> 00:12:48,640 take 8 percent of the width of the screen. 180 00:12:48,640 --> 00:12:49,810 So it is incorrect. 181 00:12:50,560 --> 00:12:57,880 Because of the device screen with beat by eight this this means that the screen is going to be actually 182 00:12:58,270 --> 00:13:06,040 divided by eight or in other words it's going to create eight parts for the screen and Vaun part of 183 00:13:06,040 --> 00:13:13,300 that eight parts is going to be actually allocated for this Tayseer for this for the ID text view. 184 00:13:13,300 --> 00:13:16,090 So in order to actually say that all you want. 185 00:13:16,090 --> 00:13:20,930 This idea takes you to take only 8 percent of that screen. 186 00:13:21,130 --> 00:13:27,370 Here we need to say Actually let's put a pair of Prentice's he had integer and actually put another 187 00:13:27,380 --> 00:13:35,530 prophetesses here and here I can see screen with multiplied by zero point zero eight. 188 00:13:35,700 --> 00:13:36,230 Right. 189 00:13:36,570 --> 00:13:42,710 But for this application I want the viewer to take only 5 percent of their screen. 190 00:13:42,780 --> 00:13:47,720 So just multiply these values screen with a by value zero point zero five. 191 00:13:47,790 --> 00:13:49,270 OK five persons. 192 00:13:49,620 --> 00:13:57,510 And then here for this actually for the name it takes here I want this name it takes to take only 20 193 00:13:57,520 --> 00:13:58,880 percent of the screen. 194 00:13:58,980 --> 00:14:05,180 So the value of this screen be multiplied by zero point twenty. 195 00:14:05,220 --> 00:14:05,780 OK. 196 00:14:06,090 --> 00:14:11,590 So in this way it's going to actually take only 20 percent of the screen with this name it it takes. 197 00:14:11,610 --> 00:14:18,130 And this price as it takes I want to actually only take 20 percent of that it takes of the screen. 198 00:14:18,170 --> 00:14:19,100 So it is OK. 199 00:14:19,480 --> 00:14:21,120 And this one color as it takes. 200 00:14:21,130 --> 00:14:26,620 I want to I want this user interface component to this as it takes to take only 20 percent of this cleavage. 201 00:14:26,910 --> 00:14:28,340 And it is also OK. 202 00:14:28,680 --> 00:14:34,840 So now this button here all you want this button to take 55 percent of the screen. 203 00:14:35,040 --> 00:14:44,550 So instead of much vitty change 255 55 screen TVs multiplied by 0.35. 204 00:14:44,710 --> 00:14:45,340 Right. 205 00:14:45,350 --> 00:14:46,950 Let's run an application now. 206 00:14:48,210 --> 00:14:49,810 Let me show you the emulator. 207 00:14:50,880 --> 00:14:53,540 So you have seen our application is running on the simulator. 208 00:14:53,670 --> 00:14:58,130 Let's click on the ellipsis button and then let's see we can update the martial arts item. 209 00:14:58,140 --> 00:15:02,460 So now you can see that this idea is taking only 5 percent of their screen TVs. 210 00:15:02,760 --> 00:15:07,490 You can see that this edit takes here for the name is taking 20 percent of the screen. 211 00:15:07,890 --> 00:15:13,680 This one is a price is actually taking a 20 percent of the screen with it. 212 00:15:13,710 --> 00:15:19,130 So not just that that the keyboard here is actually showing us only the numbers the input type of these 213 00:15:19,140 --> 00:15:22,420 edits is actually the number right input type. 214 00:15:22,800 --> 00:15:26,130 Let me show you this while you type class number here. 215 00:15:26,730 --> 00:15:32,790 And this one the color detail is actually only taking 20 percent of the screen width and the spot in 216 00:15:32,790 --> 00:15:36,360 here is taking 45 percent of the screen. 217 00:15:36,510 --> 00:15:44,100 So here when I actually modify or update one of these marginal objects it doesn't show me a toast message 218 00:15:44,130 --> 00:15:47,440 so that the user know that something is updated. 219 00:15:47,460 --> 00:15:51,750 Let's go to Android studio and let's go inside these update martial art activity class. 220 00:15:51,870 --> 00:15:56,000 Let's scroll down here and it's going into these unclean Metford inside these triple. 221 00:15:56,040 --> 00:16:02,280 After calling the Smurfette modified motional object on this database handle the reference I can create 222 00:16:02,310 --> 00:16:08,630 a toast message so toast that make text first we need to pass the context which is going to be update 223 00:16:08,720 --> 00:16:09,760 marshal activity. 224 00:16:09,810 --> 00:16:11,240 This come on. 225 00:16:11,280 --> 00:16:18,630 And then the message and I can say this that update is updated this martial art object is updated. 226 00:16:20,150 --> 00:16:20,800 Right. 227 00:16:20,930 --> 00:16:22,490 And then I put a comma here. 228 00:16:22,640 --> 00:16:26,400 And finally I need to specify the length of this message which is going to be short. 229 00:16:26,440 --> 00:16:31,170 That should let me create a new line here so that you can see these values better. 230 00:16:31,810 --> 00:16:34,970 And here let's run an application again. 231 00:16:35,030 --> 00:16:39,950 So let's go to the actually it's click on this little button and then click and update the martial arts 232 00:16:40,040 --> 00:16:41,270 item. 233 00:16:41,270 --> 00:16:46,960 So here let's for example change the Spock scene to kickboxing chic boxing. 234 00:16:47,840 --> 00:16:48,320 Right. 235 00:16:48,410 --> 00:16:49,780 Let's get you can modify. 236 00:16:50,630 --> 00:16:53,340 As you can see it's just this martial object is updated. 237 00:16:53,570 --> 00:16:54,380 Right. 238 00:16:54,500 --> 00:16:57,170 So now if I click on actually the back button. 239 00:16:57,170 --> 00:17:00,000 So here you can see the device has a batch button here. 240 00:17:00,020 --> 00:17:00,500 Right. 241 00:17:00,530 --> 00:17:03,490 If I click on it now I am inside this main activity class. 242 00:17:03,680 --> 00:17:09,440 And if you for example go to actually the martial arts item here if I click on it you can see that the 243 00:17:09,620 --> 00:17:13,040 value of the item 7 here is kickboxing. 244 00:17:13,250 --> 00:17:19,490 If I you can go back and if I go again to the update the martial arts activity here you can see that 245 00:17:19,700 --> 00:17:25,210 again the value of the name is kickboxing so you can see that the database is actually updated. 246 00:17:25,340 --> 00:17:26,400 Right. 247 00:17:26,420 --> 00:17:27,270 So that's it. 248 00:17:27,530 --> 00:17:29,540 Let's click on by button again. 249 00:17:29,540 --> 00:17:33,290 So now this is our update Monserrat activity class. 250 00:17:33,350 --> 00:17:38,660 So we actually implemented all these classes where we implemented an at motional activity we implemented 251 00:17:38,880 --> 00:17:43,260 delete much of that activity and we also implemented this update emotional activity. 252 00:17:43,430 --> 00:17:46,810 Now it's time to actually implement the main activity here. 253 00:17:46,880 --> 00:17:47,310 Right. 254 00:17:47,360 --> 00:17:52,070 The main screen that is going to be shown to the user for the first time that for example when the user 255 00:17:52,070 --> 00:17:55,130 runs the application this is the activity that is going to be shown to the user. 256 00:17:55,130 --> 00:17:57,570 This is the luncher activity actually. 257 00:17:57,890 --> 00:18:01,150 So let's go back into the studio and let's see what we are going to do next.