1 00:00:00,600 --> 00:00:04,520 And now we need to create another handler for this. 2 00:00:04,550 --> 00:00:07,730 But as you can see here inside is uncreate Mefford. 3 00:00:07,870 --> 00:00:09,380 We put this value here. 4 00:00:09,630 --> 00:00:18,750 So now inside this main activity class after the end in calibers of these of these PDT suddenly change 5 00:00:18,750 --> 00:00:20,540 takes water handler. 6 00:00:20,550 --> 00:00:24,310 Now I'm going to actually paste in some lines of code here in this class. 7 00:00:24,480 --> 00:00:29,730 So make sure that you are actually inside this main activity class before this and in Kurla place of 8 00:00:29,730 --> 00:00:33,860 this main activity class and then actually paste in some lines of code here. 9 00:00:34,080 --> 00:00:40,560 So as you can see here these are lines of code that I pasted here and now I'm going to explain to you 10 00:00:40,770 --> 00:00:42,010 what's going on here. 11 00:00:42,030 --> 00:00:43,200 Exactly. 12 00:00:43,200 --> 00:00:49,140 First of all as you can see we have this handler and the access modifier of this handler is private. 13 00:00:49,140 --> 00:00:53,210 This handler is final which means this is actually a constant. 14 00:00:53,610 --> 00:00:59,530 And then as you can see the data type of our handler is actually switchboard dot and see part change 15 00:00:59,550 --> 00:01:01,010 listener interface. 16 00:01:01,260 --> 00:01:01,950 Right. 17 00:01:02,430 --> 00:01:08,530 And the name of our handler is 6 bar savings per cent change the center assignment operator. 18 00:01:08,670 --> 00:01:16,100 And here I am actually creating an anonymous inner class that actually implements this on the part change 19 00:01:16,160 --> 00:01:23,220 in an interface and then it needs to actually implement the methods that are inside of that interface. 20 00:01:23,220 --> 00:01:30,150 So for example we have this unprogressive change team effort on start tracking touch and unstop tracking 21 00:01:30,150 --> 00:01:32,590 touch of which we don't need these. 22 00:01:32,600 --> 00:01:38,010 If it's here in inside our application inside our main activity class but because we are implementing 23 00:01:38,010 --> 00:01:41,910 this on each part change the center interface we need to overwrite them. 24 00:01:42,030 --> 00:01:42,550 OK. 25 00:01:42,780 --> 00:01:45,690 So let's go inside is our progress changed Smurfette. 26 00:01:45,870 --> 00:01:52,230 That actually happens when a user for example is actually working on this switchboard here. 27 00:01:52,230 --> 00:01:52,950 Right. 28 00:01:53,010 --> 00:01:57,720 When I actually see what is actually its value is actually changed. 29 00:01:57,780 --> 00:02:02,700 This method is going to be called on progress changed and this if it accepts free arguments the first 30 00:02:02,700 --> 00:02:07,700 one is C.P.R. as you can see here to see what object that we have here. 31 00:02:07,710 --> 00:02:09,060 The second one is the progress. 32 00:02:09,060 --> 00:02:15,460 So for example when we are sitting on the seat bar it can actually return a value an integer value. 33 00:02:15,600 --> 00:02:19,800 And then we can actually get that value by actually by referring to this argument. 34 00:02:19,860 --> 00:02:21,840 And here we have this from use a boolean. 35 00:02:21,960 --> 00:02:27,870 So it's going to determine whether this sequel is actually changed by the user or it is actually changed 36 00:02:27,870 --> 00:02:29,550 by the logic of the application. 37 00:02:29,550 --> 00:02:31,840 So here for this application we just want to. 38 00:02:32,280 --> 00:02:39,390 Because for this application it doesn't really matter how this argument is being used because when the 39 00:02:39,390 --> 00:02:47,300 user is changing this sick bar we can actually determine how the logic is going to be performed here. 40 00:02:47,310 --> 00:02:50,810 So now let's go inside this unprogressive method here. 41 00:02:50,940 --> 00:02:56,290 And first of all are you referred to the name of this savings per cent variable. 42 00:02:56,460 --> 00:02:57,420 So now let's go inside. 43 00:02:57,420 --> 00:03:03,780 Our main activity class here as you can see I actually created this valuable here inside our class savings 44 00:03:03,790 --> 00:03:07,480 percent assignment operator 0.25. 45 00:03:07,650 --> 00:03:12,270 So I actually created this value bet and the data type of this variable is double double. 46 00:03:12,270 --> 00:03:18,300 And then this this is the value the decimal value that I assigned to this variable initially. 47 00:03:18,300 --> 00:03:25,770 So now as you can see here inside our unprogressive if I actually referred to the name of that valuable 48 00:03:25,770 --> 00:03:27,070 savings percent. 49 00:03:27,210 --> 00:03:31,260 So this variable is going to hold the value of this percent right. 50 00:03:31,470 --> 00:03:32,540 Assignment operator. 51 00:03:32,550 --> 00:03:38,760 So here you referred to the name of this progress here the value that we actually get from this actually 52 00:03:38,760 --> 00:03:43,150 from Sikking is seeking on the seaboard divided by 100. 53 00:03:43,290 --> 00:03:48,800 So this was actually sitting on the seat while you are going to actually get an integer value. 54 00:03:48,900 --> 00:03:53,520 But because we need actually we need to convert that value to a percent. 55 00:03:53,640 --> 00:03:59,820 We need to devote that value by 100 so that we get actually a person's value and then we can assign 56 00:03:59,820 --> 00:04:02,070 that value to the savings percent. 57 00:04:02,070 --> 00:04:10,140 So now we have the savings percent and now I would actually create another Meffert in order to calculate 58 00:04:10,140 --> 00:04:10,870 the savings. 59 00:04:10,970 --> 00:04:11,470 OK. 60 00:04:11,640 --> 00:04:16,730 We need to calculate the savings according to the salary that they use if for example enters inside 61 00:04:16,730 --> 00:04:24,480 this it Etisalat here and then according to this search bar for example the user wants to save 30 percent 62 00:04:24,720 --> 00:04:28,520 income and then we can actually Chatroulette is money saved here. 63 00:04:28,860 --> 00:04:38,130 So now after the end in curly brace of this listen of this handler here I am actually pasting some lines 64 00:04:38,130 --> 00:04:43,620 of code here in say this main activity class and then I'm going to explain to you what's going on here. 65 00:04:43,650 --> 00:04:44,700 Exactly. 66 00:04:44,700 --> 00:04:49,910 So as you can see here these are the lines of code that I pasted here. 67 00:04:50,160 --> 00:04:56,220 And as you can see the access modify of this method is actually private the return type of this method 68 00:04:56,220 --> 00:05:01,500 is Voyt and the name of the Smif it is calculated savings right. 69 00:05:01,640 --> 00:05:04,120 And this method actually accepts no arguments. 70 00:05:04,190 --> 00:05:09,230 So let's go inside the curly braces of the Smurfette Let's go inside the body of this Meffert And let's 71 00:05:09,230 --> 00:05:10,890 see what's going on here. 72 00:05:10,910 --> 00:05:15,770 First of all I am actually setting the text of this text the same person. 73 00:05:15,890 --> 00:05:21,500 So now if you look at this your here if you look at our application here I am actually setting the text 74 00:05:21,560 --> 00:05:28,440 of this to the safe percent so excessive percent of set text per cent format's value that format. 75 00:05:28,670 --> 00:05:33,560 So here we are referring to it to our person formats about objects that we actually created inside our 76 00:05:33,830 --> 00:05:36,580 main activity class in life 16 as you can see here. 77 00:05:36,620 --> 00:05:44,120 I created this object is in order to actually get the specific format of actually of the person character 78 00:05:44,150 --> 00:05:48,610 according to the specific locale in the user's device. 79 00:05:48,710 --> 00:05:49,530 Right. 80 00:05:49,580 --> 00:05:55,750 So that's why I actually created this object per person format's value that format saving's percent. 81 00:05:55,760 --> 00:06:01,640 So again I'll refer to the name of this valuable that actually holds the value of the person. 82 00:06:01,640 --> 00:06:06,560 So for example when the user is actually C-Change on the search bar that this value is going to hold 83 00:06:06,560 --> 00:06:08,430 that value by percent. 84 00:06:08,840 --> 00:06:14,930 And then here we are again setting the stage see the setting is the text of this thing is a percent 85 00:06:15,680 --> 00:06:17,830 actually referring to the name of that variable. 86 00:06:18,170 --> 00:06:24,930 So now here in line 212 as you can see we created another variable which is of type double. 87 00:06:25,250 --> 00:06:27,900 And the name of this value that is saved money. 88 00:06:27,920 --> 00:06:28,370 OK. 89 00:06:28,490 --> 00:06:34,300 So it's going to calculate the savings according to the use of a salary and how much he wants. 90 00:06:34,340 --> 00:06:40,910 He or she wants to actually save his or her income and then it's going to actually hold this value so 91 00:06:40,910 --> 00:06:44,110 double saved money assignment operator. 92 00:06:44,270 --> 00:06:48,250 So as you can see here we have an operation here inside the parentheses. 93 00:06:48,320 --> 00:06:54,050 So here because there is only one operation we can actually eliminate these practices as you can see 94 00:06:54,050 --> 00:06:54,770 here. 95 00:06:55,100 --> 00:06:56,990 So total salary. 96 00:06:56,990 --> 00:07:02,570 So here you referred to the name of the salary to the value that that the user actually assigned to 97 00:07:02,570 --> 00:07:03,950 the as it takes here. 98 00:07:03,950 --> 00:07:10,820 So if you look at this say this main activity class I actually created this total salary here inside 99 00:07:10,850 --> 00:07:18,010 this class and inside the Smurfette insight is actually EDT salary change takes to watcher. 100 00:07:18,230 --> 00:07:25,160 And inside these on takes change method here as you can see I am assigning the value that the user is 101 00:07:25,160 --> 00:07:30,280 actually enter is entering into this text right here. 102 00:07:30,290 --> 00:07:31,860 I am actually getting disvalue here. 103 00:07:31,880 --> 00:07:35,010 I am actually converting this value to a string value. 104 00:07:35,030 --> 00:07:39,870 And then here I am converting this value to a double value and then we can assign that value to the 105 00:07:39,890 --> 00:07:41,900 total salary value. 106 00:07:42,140 --> 00:07:43,110 Right. 107 00:07:43,130 --> 00:07:46,430 So let's go back to our calculate saving method here. 108 00:07:46,430 --> 00:07:48,080 So total salary. 109 00:07:48,330 --> 00:07:51,250 Multiply it by savings percent. 110 00:07:51,260 --> 00:07:55,460 So in this way we can actually get the value. 111 00:07:55,640 --> 00:08:01,130 Actually the amount of money that the user wants to save and then we can actually assign that value 112 00:08:01,130 --> 00:08:02,310 to the saved money. 113 00:08:02,630 --> 00:08:09,080 OK so total salary multiplied by savings percent this value that the user enters inside is ediface multiplied 114 00:08:09,080 --> 00:08:11,720 by the value that the user for example wants to save. 115 00:08:11,720 --> 00:08:16,070 For example 30 percent or 50 percent or 100 percent. 116 00:08:16,280 --> 00:08:22,880 And then now as you can see by multiplying these two values together we can achieve the save the money 117 00:08:23,690 --> 00:08:24,350 and in line. 118 00:08:24,350 --> 00:08:29,480 Two hundred and fourteen Here now is the time to actually set the text of the stakes here. 119 00:08:29,630 --> 00:08:34,790 So th the money saved that's a text currency format value that format. 120 00:08:34,820 --> 00:08:40,640 And again we created this object currency format's value inside our main activity class here as you 121 00:08:40,640 --> 00:08:49,120 can see in order to get to the specific format of the value that is actually specific to the split locale 122 00:08:49,640 --> 00:08:52,270 that is inside of the user's device. 123 00:08:52,280 --> 00:08:53,010 Okay. 124 00:08:53,210 --> 00:09:00,370 So now here currency format value does for them and save the money as you can see here. 125 00:09:00,710 --> 00:09:05,530 So here now we can actually as scientists save the money to this takes a view here. 126 00:09:05,990 --> 00:09:13,640 So now we need to actually call this method here inside our first of what insight is on progress changed 127 00:09:13,970 --> 00:09:18,440 Mefford that is inside of this handler inside of these anonymous inner class. 128 00:09:18,440 --> 00:09:22,820 So after this line of thought here inside is unprogressive imperfect we need to actually just call this 129 00:09:22,820 --> 00:09:31,630 calculate savings here and here after this line of code here inside these on takes the change Smurfette. 130 00:09:31,700 --> 00:09:37,840 For example when the user enters a value here I just need to put these Meffert here Chad Chatroulette 131 00:09:38,060 --> 00:09:42,410 savings and in this way we can actually calculate the savings. 132 00:09:42,700 --> 00:09:47,200 And now it's time to actually run our project and see what happens. 133 00:09:47,420 --> 00:09:50,920 So here as you can see our application is running on this emulator. 134 00:09:51,020 --> 00:09:54,770 So now you want to assign a value here into these EDT salary. 135 00:09:54,800 --> 00:09:58,820 So for example the user ends five thousand dollars a month. 136 00:09:59,030 --> 00:09:59,600 Right. 137 00:09:59,930 --> 00:10:07,910 So now let me actually disappear this keyboard here and now as you can see if the user wants to save 138 00:10:07,910 --> 00:10:13,870 25 percent of his or her income this is the value that is actually saved. 139 00:10:14,180 --> 00:10:14,930 Right. 140 00:10:14,960 --> 00:10:21,540 So all the user for example wants to save 50 percent of his or her income. 141 00:10:21,580 --> 00:10:23,710 This is the value that the user should save. 142 00:10:24,800 --> 00:10:32,090 Write or if the user wants to for example save 100 percent of his or her income this is the value that 143 00:10:32,090 --> 00:10:33,580 the user should save. 144 00:10:34,070 --> 00:10:36,070 So hopefully that makes sense. 145 00:10:36,500 --> 00:10:40,680 And this is actually a completely perfect application. 146 00:10:40,760 --> 00:10:46,910 You can work on this application or you can actually for example put a scroll view here and then you 147 00:10:46,910 --> 00:10:53,930 can put some other some lots of different actually calculators inside that scroll view and then you 148 00:10:53,930 --> 00:10:56,670 can actually put your own logic here. 149 00:10:57,200 --> 00:11:03,580 And then you can just uploaded this application to the Google Play store and make application your own. 150 00:11:03,950 --> 00:11:09,680 So thank you very much for watching and hopefully this application was very helpful to you. 151 00:11:09,680 --> 00:11:15,730 I actually got lots of and lots of different features of Android to you. 152 00:11:15,830 --> 00:11:21,220 So make sure to work on these skills and make sure to master these skills that I taught you in this 153 00:11:21,230 --> 00:11:22,180 tutorial. 154 00:11:22,490 --> 00:11:23,700 Thank you very much for watching. 155 00:11:23,720 --> 00:11:29,610 And by the way if you have any questions about the concepts that I actually caught you in the lesson 156 00:11:29,810 --> 00:11:35,420 please post the discussion in the course and then I'll do my best to answer all of your questions. 157 00:11:35,420 --> 00:11:38,910 Again thank you very much for watching and I'll see you in the next year Tauriel.