android / car-samples
Duplication

Places in code with 6 or more lines that are exactly the same.

Intro
  • For duplication, we look at places in code where there are 6 or more lines of code that are exactly the same.
  • Before duplication is calculated, the code is cleaned to remove empty lines, comments, and frequently duplicated constructs such as imports.
  • You should aim at having as little as possible (<5%) of duplicated code as high-level of duplication can lead to maintenance difficulties, poor factoring, and logical contradictions.
Learn more...
Duplication Overall
  • 13% duplication:
    • 6,524 cleaned lines of cleaned code (without empty lines, comments, and frequently duplicated constructs such as imports)
    • 862 duplicated lines
  • 120 duplicates
system13% (862 lines)
Duplication per Extension
java13% (862 lines)
Duplication per Component (primary)
car_app_library/navigation/common/src/main/java/androidx/car/app/sample/navigation/common/car22% (231 lines)
car_app_library/places/common/src/main/java/androidx/car/app/sample/places/common16% (95 lines)
car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/templates11% (94 lines)
car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/navigation15% (92 lines)
car_app_library/navigation/common/src/main/java/androidx/car/app/sample/navigation/common/nav17% (69 lines)
car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/misc7% (62 lines)
car_app_library/navigation/common/src/main/java/androidx/car/app/sample/navigation/common/model10% (60 lines)
car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/textandicons24% (58 lines)
car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/renderer7% (36 lines)
car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common11% (34 lines)
car_app_library/helloworld/common/src/main/java/androidx/car/app/sample/helloworld/common53% (16 lines)
car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/common3% (9 lines)
car_app_library/navigation/common/src/main/java/androidx/car/app/sample/navigation/common/app10% (6 lines)
car-lib/CarGearViewerKotlin/automotive/src/main/java/com/example/cargearviewer0% (0 lines)
car_app_library/showcase/automotive/src/main/java/androidx/car/app/sample/showcase/automotive0% (0 lines)
car_app_library/places/common/src/main/java/androidx/car/app/sample/places/common/places0% (0 lines)

Duplication Between Components (50+ lines)

G car_app_library/navigation/common/src/main/java/androidx/car/app/sample/navigation/common/car car_app_library/navigation/common/src/main/java/androidx/car/app/sample/navigation/common/car car_app_library/places/common/src/main/java/androidx/car/app/sample/places/common car_app_library/places/common/src/main/java/androidx/car/app/sample/places/common car_app_library/navigation/common/src/main/java/androidx/car/app/sample/navigation/common/car--car_app_library/places/common/src/main/java/androidx/car/app/sample/places/common 102 car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/renderer car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/renderer car_app_library/navigation/common/src/main/java/androidx/car/app/sample/navigation/common/car--car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/renderer 72 car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/textandicons car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/textandicons car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common--car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/textandicons 66 car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/misc car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/misc car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/templates car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/templates car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/misc--car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/templates 64 car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/navigation car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/navigation car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/navigation--car_app_library/showcase/common/src/main/java/androidx/car/app/sample/showcase/common/textandicons 56

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Show more details on duplication between components...
Longest Duplicates
The list of 20 longest duplicates.
See data for all 120 duplicates...
Size#FoldersFilesLinesCode
19 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/places/c...pp/sample/places/common
RequestPermissionScreen.java
RequestPermissionScreen.java
 60:81 (57%)
60:81 (57%)
 view
18 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/showcase...howcase/common/renderer
SurfaceRenderer.java
DefaultRenderer.java
 321:341 (8%)
70:90 (26%)
 view
15 x 2 car_app_library/showcase...owcase/common/templates
car_app_library/showcase...owcase/common/templates
ListTemplateDemoScreen.java
MessageTemplateDemoScreen.java
 95:109 (25%)
81:95 (28%)
 view
13 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/places/c...pp/sample/places/common
RequestPermissionScreen.java
RequestPermissionScreen.java
 36:56 (39%)
36:56 (39%)
 view
11 x 2 car_app_library/showcase...owcase/common/templates
car_app_library/showcase...owcase/common/templates
ListTemplateDemoScreen.java
SearchTemplateDemoScreen.java
 97:107 (18%)
65:75 (26%)
 view
11 x 2 car_app_library/showcase...mmon/navigation/routing
car_app_library/showcase...mmon/navigation/routing
JunctionImageDemoScreen.java
NavigatingDemoScreen.java
 34:46 (47%)
32:44 (55%)
 view
11 x 2 car_app_library/navigati...e/navigation/common/nav
car_app_library/navigati...e/navigation/common/nav
NavigationService.java
NavigationService.java
 292:303 (2%)
311:322 (2%)
 view
11 x 2 car_app_library/showcase...owcase/common/templates
car_app_library/showcase...owcase/common/templates
MessageTemplateDemoScreen.java
SearchTemplateDemoScreen.java
 83:93 (21%)
65:75 (26%)
 view
10 x 2 car_app_library/showcase...owcase/common/templates
car_app_library/showcase...owcase/common/templates
GridTemplateDemoScreen.java
MessageTemplateDemoScreen.java
 218:227 (5%)
81:90 (19%)
 view
10 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/car
NavigationScreen.java
NavigationSession.java
 107:116 (4%)
83:92 (5%)
 view
10 x 2 car_app_library/showcase...owcase/common/templates
car_app_library/showcase...owcase/common/templates
GridTemplateDemoScreen.java
ListTemplateDemoScreen.java
 218:227 (5%)
95:104 (16%)
 view
10 x 2 car_app_library/hellowor...ample/helloworld/common
car_app_library/places/c...pp/sample/places/common
HelloWorldService.java
PlacesCarAppService.java
 50:61 (50%)
57:68 (40%)
 view
10 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/nav
NavigationSession.java
NavigationService.java
 94:103 (5%)
344:353 (2%)
 view
10 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/car
FavoritesScreen.java
SearchResultsScreen.java
 103:116 (13%)
105:118 (15%)
 view
10 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/places/c...pp/sample/places/common
SearchScreen.java
SearchScreen.java
 61:72 (15%)
70:81 (11%)
 view
9 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/nav
NavigationSession.java
NavigationService.java
 83:91 (4%)
113:121 (2%)
 view
9 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/car
FavoritesScreen.java
SearchResultsScreen.java
 85:95 (12%)
87:97 (14%)
 view
9 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/places/c...pp/sample/places/common
NavigationCarAppService.java
PlacesCarAppService.java
 86:94 (18%)
60:68 (36%)
 view
9 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/car
FavoritesScreen.java
SearchScreen.java
 58:68 (12%)
53:63 (13%)
 view
9 x 2 car_app_library/navigati...navigation/common/model
car_app_library/showcase...mmon/navigation/routing
DemoScripts.java
RoutingDemoModels.java
 144:153 (2%)
77:86 (6%)
 view
Duplicated Units
The list of top 4 duplicated units.
See data for all 4 unit duplicates...
Size#FoldersFilesLinesCode
24 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/places/c...pp/sample/places/common
RequestPermissionScreen.java
RequestPermissionScreen.java
 54:82 
54:82 
 view
8 x 4 car_app_library/navigati...e/navigation/common/car
car_app_library/showcase.../sample/showcase/common
car_app_library/places/c...pp/sample/places/common
car_app_library/hellowor...ample/helloworld/common
NavigationCarAppService.java
ShowcaseService.java
PlacesCarAppService.java
HelloWorldService.java
 88:96 
60:68 
62:70 
55:63 
 view
7 x 2 car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/car
FavoritesScreen.java
SearchScreen.java
 57:64 
52:59 
 view
7 x 3 car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/car
car_app_library/navigati...e/navigation/common/car
FavoritesScreen.java
SearchScreen.java
SearchResultsScreen.java
 109:117 
121:129 
111:119 
 view