# trinea-download: the binary drop behind Trinea's Android libraries > A repository of compiled artefacts rather than source code: demo APKs for a dozen Android libraries, a Windows archive of a decompilation tool, a native library and assorted other files. It exists so that people who want to try a library can install the built example rather than clone and build a project. **Trinea/trinea-download** — Some open project apk files, or other files upload by trinea.cn - Repository: https://github.com/Trinea/trinea-download - Website: https://codekk.com - Stars: 722 · Forks: 418 - Language: Unknown - License: not declared - Published: 2026-10-21 · Updated: 2026-10-21 · Language: en - Canonical page: https://hysenlabs.com/projects/trinea-trinea-download ## A repository of build outputs, not of libraries you import The repository description is blunt about what this is: some open project apk files, or other files upload by trinea.cn. The homepage is codekk.com, and the project is under the Trinea organisation, the same one behind the widely used Android libraries. So the contents are not a source project. There is no build system, no package manifest, no library code. What is there are compiled artefacts, mostly Android demo applications, sitting at the root of a Git repository alongside a handful of directories that do contain source. That is a slightly unusual shape for a GitHub repository, and it is deliberate. The point of publishing a demo APK is that a reader can install it on a phone or an emulator and see the library working, rather than clone a multi module Android Studio project and spend an afternoon on a Gradle sync before seeing anything move. For a library whose whole value is a visual effect, a pull to refresh list or a gesture image view, that difference is the entire demonstration. The cost of the approach is visible in the tree. The top level entries include apks such as IndexableListView.apk, android-viewbadger.apk, cards-ui-demo.apk, color-art-demo.apk, draggable-grid-viewpager-demo.apk, gesture-imageview-demo.apk, horizontal-listview-demo.apk, imageviewex-demo.apk, indexable-listview.apk, listview-animations-demo.apk, miui-note-demo.apk, photo-processing.apk, progress-wheel-demo.apk, pull-to-refresh-listview-demo.apk, pull-to-refreshview-demo.apk, quick-return-header-demo.apk, range-bar-demo.apk, resume, satellite-menu-demo.apk, slide-expandable-listView-demo.apk, staggered-gridview-demo.apk, styled-dialogs-demo.apk, times-square-demo.apk, touch-gallery-demo.apk, trinea-android-demo.apk, ui-tableview-demo.apk and wordpress-check-new-comment-regularly.apk. That is more than twenty separate demo applications, each one a different library, all in one place. ## How you actually get a file out of this repository The readme explains the download procedure, and it is not a package manager or a release asset. You click a specific file, then click the View Raw link, as the readme puts it. That is GitHub's raw file view, which serves the file bytes directly rather than rendering a page. For a binary it means the browser downloads the file. The readme illustrates the two clicks with a screenshot of the file listing and the View Raw link. The interesting consequence is that a user needs to know the exact file name, because the listing is the only index. There is no table describing which demo belongs to which library, and the readme itself does not enumerate the APKs. The readme explains only the two of them that have their own write-up: TrineaAndroidDemo.apk and android-reverse-trinea.rar. Everything else you have to recognise by name or by guessing from the file list. The readme does include a pointer to the source project. TrineaAndroidDemo.apk is described as an Android demo covering the image memory cache, the image SD card cache, a pull to refresh and scroll to bottom load more listview demo, an Android system download manager feature introduction and usage example, ViewPager multi page, a scroll to bottom or top response ScrollView, a Gallery swipe one page effect demo, a SearchView demo, ViewPager and Fragment usage, a Service demo and a BroadcastReceiver demo, with a link to the TrineaAndroidDemo project for the specifics. So the pattern for a reader is: find the demo you care about, download the built apk, install it, and if you want the code, go to the linked source project instead. The apks are a convenience mirror, not the canonical artefact. ## The decompilation tool archive is the odd one out One file in the list is not an Android application at all. android-reverse-trinea.rar is described as an Android decompilation tool, with a link to a write-up on the blog about viewing source code and resource files from an Android APK. A .rar archive is a 1990s format and its presence tells you the age of that particular asset. It is a Windows tool, it is archived rather than distributed as a modern installer, and the readme describes it in the past tense of a tool that was current years ago. It is worth naming the legal shape of this too, because it is different from the demo APKs. Decompiling your own application to read its resources is legitimate work that Android developers do routinely. A tool archive is a tool, and a tool is neutral; the readme is pointing at a tool, not at a cracked application. Other non-APK entries sit alongside the demos. There is a libapkpatch.so native library, directories for source content including Conference, Share, doc, image, nutiteq, resume, temp and xml, and a tcpdump entry. The mixture of binaries, archives, source directories and a raw tcpdump capture in one repository makes it a personal workspace that happens to be public, which is worth remembering when you decide how much to read into any single part of it. ## Two APKs that the readme explains in detail Of the files in the repository, two get a proper description. TrineaAndroidDemo.apk is the aggregate demo application, and its list of included samples is long enough to be a decent index of what Trinea has built. It covers the image memory cache, the image SD card cache, pull to refresh and scroll to bottom load more in a listview, the Android system DownloadManager feature, ViewPager multi page, a ScrollView that responds to scrolling to the bottom or top, a Gallery swipe one page effect, SearchView, ViewPager and Fragment usage, a Service demo and a BroadcastReceiver demo. Each entry links to the corresponding blog post on trinea.cn, so the readme doubles as an index into the author's writing. wordpress-check-new-comment-regularly.apk is described as the WordPress Android application with a feature that checks for new comments on a timer. It is an application built with a Trinea library rather than a library demonstration, which is a slightly different category, and it links to the wordpress-check-new-comment-regularly source project. There is also a wildcard entry in the readme for other APK files, described as Android open source code APKs used by the Trinea/android-open-project repository. So the bulk of the files are built examples for an ecosystem of open source Android projects rather than for Trinea's own commercial work. ## The development tools app is distributed through the Play Store The one product link in the readme is a Play Store listing rather than a download from the repository, and it is worth separating that from the demo APKs. The readme gives the latest version download address for the developer efficiency tools app, pointing at the Play Store listing with the package id cn.trinea.android.developertools. The distinction matters practically. An APK downloaded from a raw file link has to be sideloaded, which means allowing installation from unknown sources on the device and dealing with whatever the device does with an app that has not been through a store review. An app installed from the Play Store is signed with a key the store manages, updates itself, and has been through a review process. The readme also carries the personal blog link at trinea.cn and the Trinea badge at the top, so the repository sits as a companion to the author's blog rather than as a distribution channel for a product. For anyone evaluating the Trinea libraries, the practical sequence is therefore the one the readme implies. Install the app from the Play Store if you want to see the developer tooling in its shipped form, download the demo APK of the specific library you want to evaluate, and go to the linked source projects for the code. This repository is the sample bin, not the shop. ## Why there is no build step, and what that means for you The absence of a build system is the defining constraint, and it cuts both ways. For a reader who wants to evaluate a library, the prebuilt APKs remove an entire category of friction. You do not need an Android SDK version that matches, you do not need to resolve the dependency graph of a project from several years ago, and you do not need a machine that can build it. You install a file and see the effect. For a library whose selling point is a pull to refresh gesture or a photo view with pinch zoom, that is a genuinely better evaluation loop than a clone and a build. For a reader who wants to depend on the library in their own application, this repository is close to useless. There is no Maven coordinate to add, no source to read for the API surface, and no way to take a fix from here, because the fixes belong in the linked source repositories. There is also a version skew problem. The APKs were built at particular dates against particular library versions and particular Android platform versions, and none of that is recorded here. A demo APK from this repository may exercise an API that has since changed, and it will not tell you which version it was built from. If you are going to base a decision on what you see in the demo, the source project it came from is the place that tells you the version. The relationship to the newer repositories matters as well. The tree shows auxiliary directories such as Conference, Share and nutiteq that look like the beginnings of extracted projects, alongside a temp directory and a tcpdump capture. This is a workspace that accumulated content over years rather than a curated distribution, and the selection of what is present is not governed by any documented rule. ## Where this repository is the wrong place to look There are several cases where reading this repository is a detour. The first is if you are looking for a library to use. Nothing here is importable. The Android libraries Trinea is known for, the image loader, the pull to refresh listview, the image cache components, are developed in their own repositories, and this one is a bin of compiled examples. If you are starting an application, you are looking in entirely the wrong tree. The second is if you need current examples. The repository is not archived and the last push was on 2026-05-05, but the file list shows artefacts from a long period of Android development, including the WordPress client and a decompilation tool archive. Nothing in the readme dates the individual binaries, so a demo APK from here is a snapshot of a past version of a library, and the demo may exercise behaviour that has since changed. The third is if you need the code. The readme says the specifics are visible in the TrineaAndroidDemo project, and every library demo links to its own source project, so the source of truth is elsewhere. Reading the decompiled contents of the demo APKs is possible with the bundled tool, but that is a way of looking at an old build, not a way of working with the library. The fourth is licensing and provenance, and this one deserves attention. The repository records no licence, so the terms under which you may use, redistribute or decompile these files are not stated. For a demo you install on your own phone, that is an academic question. For anything you redistribute inside a product or a talk, it is a real one, and the answer is to look at the licence of the source project each file came from rather than assuming a default. And the fifth is the decompilation tool. It is there to inspect your own applications, which is a normal developer task, but it is also the kind of tool that is used on other people's applications, and the repository's provenance for that particular archive is a readme link to a blog post rather than a distribution of a maintained tool. ## Conclusion Adopt trinea-download if you want to run a Trinea library example on a device quickly, or need the decompilation tool archive and the native library that go with those examples. Do not adopt it as a dependency in a build, because it holds binaries rather than source, and there is no licence recorded for the repository so the terms for reuse are not stated. Verify first that the file you want is actually present, since the tree mixes APKs with source directories, and that the release page on the Play Store listing still matches what these binaries are meant to demonstrate. ## FAQ ### What is in the trinea-download repository? The repository holds some open project apk files, or other files upload by trinea.cn. The tree contains more than twenty demo APKs for Android libraries, an android-reverse-trinea.rar decompilation tool archive, a libapkpatch.so native library, and a few source directories. ### How do I download a file from the trinea-download repository? Click a specific file and then click the View Raw link, as the readme describes with a screenshot. There is no package manager or release asset involved, so you need to know the exact file name in advance. ### Where is the source code for the trinea-download demo applications? The readme links the TrineaAndroidDemo project for the specifics of the demo app, and points to the Trinea/android-open-project repository for the other open source APKs. This repository holds the built binaries, not the code. ### What is android-reverse-trinea.rar? It is described as an Android decompilation tool, with a link to a blog article about viewing source code and resource files from an Android APK. It is an archive rather than an installer, and it is a tool rather than one of the demo applications. ### Is there a way to install the Trinea developer tools app from this repository? The readme points to the Play Store listing for the developer efficiency tools app, package id cn.trinea.android.developertools, rather than to a download from the repository. The repository APKs are demo applications installed by sideloading. ### Is trinea-download still being updated? The repository is not archived and the last push was on 2026-05-05, but it has no GitHub releases and no recorded licence. The file list mixes long-standing artefacts, including the WordPress client and the decompilation archive, with newer demo builds, and the readme does not date the individual files. ## Sources - [Issues](https://github.com/Trinea/trinea-download/issues) - [Project website](https://codekk.com) - [README](https://github.com/Trinea/trinea-download/blob/master/README.md) - [Trinea/trinea-download on GitHub](https://github.com/Trinea/trinea-download) --- Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/trinea-trinea-download