[Ethireclya]: (Udemy) Master Android 7 App Development

Category Other
Type Tutorials
Language English
Total size 6.8 GB
Uploaded By Ethireclya
Downloads 1110
Last checked 1 week ago
Date uploaded 9 years ago
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Infohash : 5C5E20E0F04595287B36143A9637C5A5DA97CD0F
Master Android 7 App Development

You've heard how Android app developers are in high demand, but perhaps you haven't gotten started with app development yet?

Perhaps you have searched to find a course that not only shows how to build apps step by step, but one that actually explains why things are done in a certain way?

Maybe you are struggling to find a course that really can teach you the in's and out's of becoming an Android app developer?

Do you need to understand how to write apps for both the current version of Android (Nougat), but also have that same app work with older Android devices running older versions of the Android operating system?

Then this is the course for you!

In this course, you will discover the power of Android app development, and obtain skills to dramatically increase your career prospects as a software developer.

https://www.udemy.com/master-android-7-nougat-java-app-development-step-by-step/
                Files: 

                Master Android 7 App Development
07-top-10-downloaded-app
102-improving-the-adapter.mp4 (85.9 MB)
084-introduction-to-this-section.mp4 (20.7 MB)
085-details-and-setup.mp4 (72.0 MB)
086-async-task.mp4 (41.1 MB)
087-exectute-our-async-task.mp4 (17.2 MB)
088-doinbackground-and-downloadxml.mp4 (30.6 MB)
089-exceptions-and-buffered-reader.mp4 (33.8 MB)
090-security-exception.mp4 (33.6 MB)
091-stack-trace-and-the-logcat.mp4 (39.8 MB)
092-android-app-permissions.mp4 (52.3 MB)
093-processing-xml-data.mp4 (37.4 MB)
094-xml-parsing-factory-classes.mp4 (32.9 MB)
095-main-xml-parsing-loop.mp4 (33.6 MB)
096-testing-the-program.mp4 (50.8 MB)
097-listview-and-arrayadapters.mp4 (44.7 MB)
098-array-adapter.mp4 (35.3 MB)
099-adapter-layout.mp4 (29.2 MB)
100-context-and-layout-inflater.mp4 (28.0 MB)
101-custom-adapter-implementation.mp4 (42.7 MB)
103-adding-menus.mp4 (38.6 MB)
104-get-menus-for-multiple-feeds-working.mp4 (30.7 MB)
105-menu-item-groups.mp4 (21.9 MB)
106-implement-top-10-and-top-25.mp4 (63.5 MB)
107-challenge-solution.mp4 (82.7 MB)
108-generics-adapter.mp4 (17.2 MB)
captions084-introduction-to-this-section-EN.srt (2.3 KB)
085-details-and-setup-EN.srt (22.1 KB)
086-async-task-EN.srt (19.5 KB)
087-exectute-our-async-task-EN.srt (7.7 KB)
088-doinbackground-and-downloadxml-EN.srt (15.3 KB)
089-exceptions-and-buffered-reader-EN.srt (15.0 KB)
090-security-exception-EN.srt (13.9 KB)
091-stack-trace-and-the-logcat-EN.srt (11.9 KB)
092-android-app-permissions-EN.srt (19.8 KB)
093-processing-xml-data-EN.srt (15.4 KB)
094-xml-parsing-factory-classes-EN.srt (11.8 KB)
095-main-xml-parsing-loop-EN.srt (14.5 KB)
096-testing-the-program-EN.srt (16.4 KB)
097-listview-and-arrayadapters-EN.srt (18.3 KB)
098-array-adapter-EN.srt (10.8 KB)
099-adapter-layout-EN.srt (12.9 KB)
100-context-and-layout-inflater-EN.srt (14.9 KB)
101-custom-adapter-implementation-EN.srt (14.4 KB)
102-improving-the-adapter-EN.srt (20.8 KB)
103-adding-menus-EN.srt (16.6 KB)
104-get-menus-for-multiple-feeds-working-EN.srt (8.5 KB)
105-menu-item-groups-EN.srt (13.6 KB)
106-implement-top-10-and-top-25-EN.srt (15.6 KB)
107-challenge-solution-EN.srt (22.2 KB)
108-generics-adapter-EN.srt (5.3 KB)
01-introduction002-interface-overview.mp4 (28.7 MB)
captions001-welcome-EN.srt (4.9 KB)
002-interface-overview-EN.srt (8.4 KB)
001-welcome.mp4 (41.5 MB)
02-downloading-and-setup003-introduction-to-this-section.mp4 (14.5 MB)
004-install-jdk-for-windows.mp4 (19.6 MB)
005-install-android-studio-for-windows.mp4 (19.5 MB)
006-install-jdk-for-mac.mp4 (11.2 MB)
007-install-android-studio-for-mac.mp4 (43.3 MB)
008-install-jdk-for-linux.mp4 (19.2 MB)
009-install-android-studio-on-linux.mp4 (53.4 MB)
010-configure-android-studio-on-all-three-platforms.mp4 (54.3 MB)
011-enable-vtx.mp4 (62.2 MB)
captions003-introduction-to-this-section-EN.srt (1.6 KB)
004-install-jdk-for-windows-EN.srt (8.6 KB)
005-install-android-studio-for-windows-EN.srt (10.5 KB)
006-install-jdk-for-mac-EN.srt (4.0 KB)
007-install-android-studio-for-mac-EN.srt (11.8 KB)
008-install-jdk-for-linux-EN.srt (6.0 KB)
009-install-android-studio-on-linux-EN.srt (19.2 KB)
010-configure-android-studio-on-all-three-platforms-EN.srt (29.0 KB)
011-enable-vtx-EN.srt (22.4 KB)
03-hello-world-android-app012-introduction-to-this-section.mp4 (10.2 MB)
013-android-studio-templates.mp4 (45.9 MB)
014-our-first-application.mp4 (34.5 MB)
015-our-first-application-continued.mp4 (35.6 MB)
016-android-studio-tour.mp4 (39.0 MB)
017-setup-of-an-android-virtual-device.mp4 (25.5 MB)
018-run-hello-world-on-an-android-virtual-device.mp4 (41.8 MB)
019-run-hello-world-on-a-real-android-device.mp4 (25.7 MB)
captions012-introduction-to-this-section-EN.srt (1.2 KB)
013-android-studio-templates-EN.srt (25.7 KB)
014-our-first-application-EN.srt (16.9 KB)
015-our-first-application-continued-EN.srt (17.3 KB)
016-android-studio-tour-EN.srt (22.5 KB)
017-setup-of-an-android-virtual-device-EN.srt (19.8 KB)
018-run-hello-world-on-an-android-virtual-device-EN.srt (16.8 KB)
019-run-hello-world-on-a-real-android-device-EN.srt (17.4 KB)
04-the-button-counter-app020-introduction-to-this-section.mp4 (30.1 MB)
021-playing-with-the-designer.mp4 (49.5 MB)
022-scaling-and-resizing-images-in-the-designer.mp4 (29.4 MB)
023-constraints.mp4 (26.3 MB)
024-fixed-any-size-wrap-content.mp4 (16.9 MB)
025-supporting-different-densities.mp4 (26.0 MB)
026-autoconnect.mp4 (30.5 MB)
027-baseline-constraint.mp4 (31.8 MB)
028-adding-scrolling-capability.mp4 (40.3 MB)
029-infer-constraints.mp4 (50.6 MB)
030-build-layout-challenge.mp4 (55.5 MB)
031-ids-and-xml-code.mp4 (25.5 MB)
032-activites-bundles-and-classes.mp4 (44.4 MB)
033-java-fields-and-classes.mp4 (34.3 MB)
034-asking-good-questions.mp4 (19.2 MB)
035-button-click-and-onclicklistener.mp4 (40.5 MB)
036-fixing-some-issues.mp4 (44.1 MB)
037-get-text-and-null-checking.mp4 (39.1 MB)
038-id-confusion-and-challenge-time.mp4 (32.2 MB)
039-save-instance-state.mp4 (24.8 MB)
040-activity-lifecycle.mp4 (23.4 MB)
041-overriding-methods.mp4 (41.9 MB)
042-logging-and-bundle-data.mp4 (61.9 MB)
043-wrap-up.mp4 (32.2 MB)
captions020-introduction-to-this-section-EN.srt (3.1 KB)
021-playing-with-the-designer-EN.srt (24.3 KB)
022-scaling-and-resizing-images-in-the-designer-EN.srt (17.2 KB)
023-constraints-EN.srt (19.3 KB)
024-fixed-any-size-wrap-content-EN.srt (14.0 KB)
025-supporting-different-densities-EN.srt (17.7 KB)
026-autoconnect-EN.srt (21.7 KB)
027-baseline-constraint-EN.srt (23.6 KB)
028-adding-scrolling-capability-EN.srt (17.4 KB)
029-infer-constraints-EN.srt (18.1 KB)
030-build-layout-challenge-EN.srt (25.8 KB)
031-ids-and-xml-code-EN.srt (10.7 KB)
032-activites-bundles-and-classes-EN.srt (21.3 KB)
033-java-fields-and-classes-EN.srt (18.6 KB)
034-asking-good-questions-EN.srt (7.4 KB)
035-button-click-and-onclicklistener-EN.srt (16.7 KB)
036-fixing-some-issues-EN.srt (20.8 KB)
037-get-text-and-null-checking-EN.srt (19.4 KB)
038-id-confusion-and-challenge-time-EN.srt (14.6 KB)
039-save-instance-state-EN.srt (11.9 KB)
040-activity-lifecycle-EN.srt (8.2 KB)
041-overriding-methods-EN.srt (17.0 KB)
042-logging-and-bundle-data-EN.srt (22.2 KB)
043-wrap-up-EN.srt (10.9 KB)
05-java-tutorials044-introduction-to-this-section.mp4 (18.6 MB)
045-hello-world.mp4 (35.9 MB)
046-strings-and-ints.mp4 (27.4 MB)
047-arithmetic-and-string-concatenation.mp4 (35.7 MB)
048-classes.mp4 (33.1 MB)
049-encapsulation.mp4 (40.2 MB)
050-multiple-constructors.mp4 (32.9 MB)
051-this-and-calling-methods.mp4 (35.7 MB)
052-object-and-method-chaining.mp4 (44.1 MB)
053-enum-and-arraylist.mp4 (35.9 MB)
054-testing-our-classes.mp4 (34.6 MB)
055-inheritance.mp4 (40.6 MB)
056-extending-from-a-class.mp4 (19.2 MB)
057-overloading-and-overriding-annotation.mp4 (29.4 MB)
058-inheritance-challenge.mp4 (16.1 MB)
059-repeating-code-while.mp4 (34.9 MB)
060-for-and-for-each-loops.mp4 (41.4 MB)
061-do-while-loop.mp4 (17.7 MB)
062-comparing-numbers-and-objects.mp4 (37.0 MB)
captions044-introduction-to-this-section-EN.srt (2.2 KB)
045-hello-world-EN.srt (23.7 KB)
046-strings-and-ints-EN.srt (20.7 KB)
047-arithmetic-and-string-concatenation-EN.srt (18.3 KB)
048-classes-EN.srt (22.8 KB)
049-encapsulation-EN.srt (21.2 KB)
050-multiple-constructors-EN.srt (20.0 KB)
051-this-and-calling-methods-EN.srt (20.2 KB)
052-object-and-method-chaining-EN.srt (24.2 KB)
053-enum-and-arraylist-EN.srt (23.4 KB)
054-testing-our-classes-EN.srt (18.7 KB)
055-inheritance-EN.srt (19.2 KB)
056-extending-from-a-class-EN.srt (11.9 KB)
057-overloading-and-overriding-annotation-EN.srt (19.1 KB)
058-inheritance-challenge-EN.srt (8.8 KB)
059-repeating-code-while-EN.srt (17.0 KB)
060-for-and-for-each-loops-EN.srt (17.1 KB)
061-do-while-loop-EN.srt (7.0 KB)
062-comparing-numbers-and-objects-EN.srt (17.2 KB)
06-calculator-app063-introduction-to-this-section.mp4 (17.6 MB)
064-details-and-setup.mp4 (24.7 MB)
065-calculator-layout.mp4 (32.4 MB)
066-layout-continued.mp4 (32.5 MB)
067-finishing-the-layout.mp4 (25.6 MB)
068-input-type-and-focus-changes.mp4 (26.6 MB)
069-add-landscape-layout.mp4 (50.2 MB)
070-comparing-code-and-layouts.mp4 (85.5 MB)
071-comparing-directories.mp4 (62.5 MB)
072-flowchart-and-onclicklisteners.mp4 (44.1 MB)
073-operation-button-listeners.mp4 (23.4 MB)
074-implement-operations.mp4 (31.9 MB)
075-decimal-point-bug-fix.mp4 (39.1 MB)
076-bug-fix-challenge.mp4 (34.8 MB)
077-fixing-the-landscape-layout.mp4 (35.8 MB)
078-finish-and-test-layout.mp4 (26.7 MB)
079-mini-challenge-solution-and-new-challenge.mp4 (22.4 MB)
080-add-neg-button.mp4 (27.2 MB)
081-write-neg-button-functionality.mp4 (28.2 MB)
082-portrait-layout.mp4 (39.3 MB)
083-finish-off-layout-and-test.mp4 (35.5 MB)
captions063-introduction-to-this-section-EN.srt (2.0 KB)
064-details-and-setup-EN.srt (11.6 KB)
065-calculator-layout-EN.srt (20.2 KB)
066-layout-continued-EN.srt (18.2 KB)
067-finishing-the-layout-EN.srt (14.8 KB)
068-input-type-and-focus-changes-EN.srt (16.7 KB)
069-add-landscape-layout-EN.srt (17.9 KB)
070-comparing-code-and-layouts-EN.srt (17.7 KB)
071-comparing-directories-EN.srt (20.8 KB)
072-flowchart-and-onclicklisteners-EN.srt (16.4 KB)
073-operation-button-listeners-EN.srt (9.2 KB)
074-implement-operations-EN.srt (12.5 KB)
075-decimal-point-bug-fix-EN.srt (17.3 KB)
076-bug-fix-challenge-EN.srt (12.0 KB)
077-fixing-the-landscape-layout-EN.srt (18.4 KB)
078-finish-and-test-layout-EN.srt (9.0 KB)
079-mini-challenge-solution-and-new-challenge-EN.srt (8.0 KB)
080-add-neg-button-EN.srt (10.2 KB)
081-write-neg-button-functionality-EN.srt (10.5 KB)
082-portrait-layout-EN.srt (14.5 KB)
083-finish-off-layout-and-test-EN.srt (15.2 KB)
08-youtube-app109-introduction-to-this-section.mp4 (24.3 MB)
110-details-and-setup.mp4 (18.9 MB)
111-youtube-api-setup.mp4 (33.7 MB)
112-add-second-activity.mp4 (22.6 MB)
113-adding-layouts-dynamically.mp4 (45.6 MB)
114-get-google-api-key.mp4 (41.2 MB)
115-oninitialization-failure.mp4 (45.4 MB)
116-oninitialization-success.mp4 (22.0 MB)
117-test-app-and-add-listeners.mp4 (28.3 MB)
118-documentation-and-more-testing.mp4 (29.0 MB)
119-demo-app-and-create-layouts.mp4 (35.9 MB)
120-standalone-activity.mp4 (31.1 MB)
121-intents-and-manifest-file-changes.mp4 (38.9 MB)
122-run-and-test-app.mp4 (26.7 MB)
123-challenge-solution.mp4 (27.7 MB)
captions109-introduction-to-this-section-EN.srt (2.6 KB)
110-details-and-setup-EN.srt (8.9 KB)
111-youtube-api-setup-EN.srt (16.1 KB)
112-add-second-activity-EN.srt (16.1 KB)
113-adding-layouts-dynamically-EN.srt (18.1 KB)
114-get-google-api-key-EN.srt (21.7 KB)
115-oninitialization-failure-EN.srt (15.6 KB)
116-oninitialization-success-EN.srt (8.5 KB)
117-test-app-and-add-listeners-EN.srt (12.1 KB)
118-documentation-and-more-testing-EN.srt (8.8 KB)
119-demo-app-and-create-layouts-EN.srt (15.6 KB)
120-standalone-activity-EN.srt (14.4 KB)
121-intents-and-manifest-file-changes-EN.srt (15.5 KB)
123-challenge-solution-EN.srt (9.6 KB)
09-flickr-app124-introduction-to-this-section.mp4 (18.7 MB)
125-details-and-setup.mp4 (38.4 MB)
126-flickr-api-usage.mp4 (51.0 MB)
127-api-json-and-validation.mp4 (34.7 MB)
128-create-project.mp4 (46.6 MB)
129-async-task.mp4 (30.4 MB)
130-finish-download-code.mp4 (40.5 MB)
131-download-json-data.mp4 (69.6 MB)
132-project-diagram-and-photo-class-code.mp4 (39.4 MB)
133-get-flickr-json-data-class-code.mp4 (27.5 MB)
134-create-uri-and-json-parsing.mp4 (46.0 MB)
135-implement-call-backs.mp4 (49.7 MB)
136-make-get-json-asyncronous.mp4 (56.8 MB)
137-finish-off-code.mp4 (35.4 MB)
138-user-interface.mp4 (36.4 MB)
139-recycler-view.mp4 (48.1 MB)
140-search-and-photo-detail-activities.mp4 (33.6 MB)
141-nesting-linear-layouts.mp4 (28.4 MB)
142-recyclerview-adapter.mp4 (45.5 MB)
143-implement-methods-and-picasso.mp4 (48.2 MB)
144-get-picasso-working.mp4 (31.9 MB)
145-gesture-detector.mp4 (39.8 MB)
146-touch-events.mp4 (45.5 MB)
147-implementing-touch-methods.mp4 (36.4 MB)
148-baseactivity-and-serializable.mp4 (42.6 MB)
149-photodetailactivity.mp4 (51.5 MB)
150-material-design.mp4 (54.8 MB)
151-material-design-continued.mp4 (26.7 MB)
152-backwards-compatibility.mp4 (39.3 MB)
153-style-sheets.mp4 (38.6 MB)
154-custom-style-sheet.mp4 (55.7 MB)
155-experimenting-with-styles.mp4 (29.1 MB)
156-other-material-design-changes.mp4 (59.6 MB)
157-differences-in-api-levels-and-challenge.mp4 (50.7 MB)
158-string-resources.mp4 (42.3 MB)
159-search-menu-code.mp4 (39.3 MB)
160-searchview.mp4 (45.1 MB)
161-searchmanager.mp4 (46.4 MB)
162-implement-searching.mp4 (57.9 MB)
163-shared-preferences.mp4 (36.0 MB)
164-show-empty-search-message-and-summary.mp4 (24.0 MB)
captions124-introduction-to-this-section-EN.srt (2.2 KB)
125-details-and-setup-EN.srt (18.6 KB)
126-flickr-api-usage-EN.srt (18.3 KB)
127-api-json-and-validation-EN.srt (10.9 KB)
128-create-project-EN.srt (25.0 KB)
129-async-task-EN.srt (18.1 KB)
130-finish-download-code-EN.srt (19.7 KB)
131-download-json-data-EN.srt (24.2 KB)
132-project-diagram-and-photo-class-code-EN.srt (18.0 KB)
133-get-flickr-json-data-class-code-EN.srt (12.5 KB)
134-create-uri-and-json-parsing-EN.srt (18.5 KB)
136-make-get-json-asyncronous-EN.srt (20.1 KB)
137-finish-off-code-EN.srt (15.4 KB)
138-user-interface-EN.srt (17.5 KB)
139-recycler-view-EN.srt (27.1 KB)
140-search-and-photo-detail-activities-EN.srt (17.6 KB)
141-nesting-linear-layouts-EN.srt (15.4 KB)
142-recyclerview-adapter-EN.srt (21.1 KB)
143-implement-methods-and-picasso-EN.srt (20.4 KB)
144-get-picasso-working-EN.srt (12.7 KB)
145-gesture-detector-EN.srt (15.9 KB)
146-touch-events-EN.srt (14.2 KB)
147-implementing-touch-methods-EN.srt (12.4 KB)
148-baseactivity-and-serializable-EN.srt (19.2 KB)
149-photodetailactivity-EN.srt (18.7 KB)
150-material-design-ES.srt (22.9 KB)
151-material-design-continued-EN.srt (14.6 KB)
152-backwards-compatibility-EN.srt (14.0 KB)
153-style-sheets-EN.srt (17.9 KB)
154-custom-style-sheet-EN.srt (16.4 KB)
155-experimenting-with-styles-EN.srt (11.6 KB)
156-other-material-design-changes-EN.srt (17.0 KB)
157-differences-in-api-levels-and-challenge-EN.srt (18.2 KB)
158-string-resources-EN.srt (22.2 KB)
159-search-menu-code-EN.srt (17.0 KB)
160-searchview-EN.srt (21.2 KB)
161-searchmanager-EN.srt (17.5 KB)
162-implement-searching-EN.srt (16.7 KB)
163-shared-preferences-EN.srt (11.2 KB)
164-show-empty-search-message-and-summary-EN.srt (10.6 KB)
10-databases-and-the-friends-app165-introduction-to-this-section.mp4 (22.9 MB)
166-introduction-to-databases.mp4 (21.7 MB)
167-database-terminology.mp4 (23.7 MB)
168-command-line-and-path-setup-for-windows.mp4 (24.0 MB)
169-command-line-and-path-setup-for-mac.mp4 (33.6 MB)
170-command-line-and-path-setup-for-ubuntu-linux.mp4 (18.8 MB)
171-introduction-to-sqlite.mp4 (32.4 MB)
172-more-sql-with-sqlite.mp4 (23.3 MB)
173-sqlite-querying-data.mp4 (49.4 MB)
174-order-by-and-joins.mp4 (58.0 MB)
175-more-complex-joins.mp4 (53.8 MB)
176-wild-cards-and-views.mp4 (50.5 MB)
177-housekeeping-and-challenge.mp4 (40.7 MB)
178-basic-sql-in-android.mp4 (44.5 MB)
179-debugging-sql-in-code.mp4 (41.6 MB)
180-cursor-and-navigation.mp4 (21.0 MB)
181-android-file-system.mp4 (51.3 MB)
182-content-providers.mp4 (12.4 MB)
183-setup-contacts.mp4 (28.5 MB)
184-contract-provider-example.mp4 (44.1 MB)
185-contractscontract.contracts.mp4 (31.7 MB)
186-contentresolver.mp4 (40.6 MB)
187-permissions-api-22-and-earlier.mp4 (32.1 MB)
188-permissions-api-23-and-higher.mp4 (45.0 MB)
189-checking-permissions-at-runtime.mp4 (47.2 MB)
captions165-introduction-to-this-section-EN.srt (2.6 KB)
166-introduction-to-databases-EN.srt (6.9 KB)
167-database-terminology-EN.srt (15.1 KB)
168-command-line-and-path-setup-for-windows-EN.srt (14.8 KB)
169-command-line-and-path-setup-for-mac-EN.srt (11.7 KB)
170-command-line-and-path-setup-for-ubuntu-linux-EN.srt (9.3 KB)
171-introduction-to-sqlite-EN.srt (0.3 KB)
172-more-sql-with-sqlite-EN.srt (0.3 KB)
173-sqlite-querying-data-EN.srt (0.3 KB)
174-order-by-and-joins-EN.srt (0.3 KB)
175-more-complex-joins-EN.srt (0.3 KB)
176-wild-cards-and-views-EN.srt (0.3 KB)
177-housekeeping-and-challenge-EN.srt (0.3 KB)
178-basic-sql-in-android-EN.srt (0.3 KB)
179-debugging-sql-in-code-EN.srt (0.3 KB)
180-cursor-and-navigation-EN.srt (0.3 KB)
181-android-file-system-EN.srt (0.3 KB)
182-content-providers-EN.srt (0.3 KB)
183-setup-contacts-EN.srt (0.3 KB)
184-contract-provider-example-EN.srt (0.3 KB)
185-contractscontract.contracts-EN.srt (0.3 KB)
186-contentresolver-EN.srt (0.3 KB)
187-permissions-api-22-and-earlier-EN.srt (0.3 KB)
188-permissions-api-23-and-higher-EN.srt (0.3 KB)
189-checking-permissions-at-runtime-EN.srt (15.1 KB)
11-extras190-upgrading-to-android-studio-2.2-for-windows.mp4 (26.2 MB)
191-upgrading-to-android-studio-2.2-for-mac.mp4 (32.6 MB)
192-upgrading-to-android-studio-2.2-for-linux.mp4 (13.3 MB)
193-source-code-for-all-apps.html (28.7 KB)
captions190-upgrading-to-android-studio-2.2-for-windows-EN.srt (14.9 KB)
191-upgrading-to-android-studio-2.2-for-mac-EN.srt (6.2 KB)
192-upgrading-to-android-studio-2.2-for-linux-EN.srt (7.3 KB)
Comments

Code:

udp://tracker.openbittorrent.com:80