For lower versions of the platform, use the ColorFilter class. You can also omit resources that are only a rotated equivalent of another resource. The following code snippet provides an example of turning a "thumb up" into a "thumb down" by pivoting at the middle of the image and rotating it degrees:. You can also reduce your APK size by procedurally rendering your images. Procedural rendering frees up space because you no longer store an image file in your APK.
For example, the aapt tool can convert a true-color PNG that does not require more than colors to an 8-bit PNG with a color palette. Doing so results in an image of equal quality but a smaller memory footprint. Keep in mind that the aapt has the following limitations:. You can reduce PNG file sizes without losing image quality using tools like pngcrush , pngquant , or zopflipng. All of these tools can reduce PNG file size while preserving the perceptive image quality. The pngcrush tool is particularly effective: This tool iterates over PNG filters and zlib Deflate parameters, using each combination of filters and parameters to compress the image.
It then chooses the configuration that yields the smallest compressed output. You can use vector graphics to create resolution-independent icons and other scalable media. Using these graphics can greatly reduce your APK footprint. Vector images are represented in Android as VectorDrawable objects. With a VectorDrawable object, a byte file can generate a sharp image the size of the screen. However, it takes a significant amount of time for the system to render each VectorDrawable object, and larger images take even longer to appear on the screen.
Therefore, consider using these vector graphics only when displaying small images.
For more information on working with VectorDrawable objects, see Working with Drawables. Do not use AnimationDrawable to create frame-by-frame animations because doing so requires that you include a separate bitmap file for each frame of the animation, which drastically increase the size of your APK. Instead, you should use AnimatedVectorDrawableCompat to create animated vector drawables.
Comment optimiser ses images pour le web ?
Reduce native and Java code There are several methods you can use to reduce the size of the Java and native codebase in your app. Make sure to understand the footprint of any code which is automatically generated. For example, many protocol buffer tools generate an excessive number of methods and classes, which can double or triple the size of your app. A single enum can add about 1. These additions can quickly accumulate for complex systems or shared libraries. If possible, consider using the IntDef annotation and ProGuard to strip enumerations out and convert them to integers.
This type conversion preserves all of the type safety benefits of enums. If your app uses native code and the Android NDK, you can also reduce the size of the release version of your app by optimizing your code. Two useful techniques are removing debug symbols and not extracting native libraries. Using debug symbols makes sense if your application is in development and still requires debugging. Use the arm-eabi-strip tool, provided in the Android NDK, to remove unnecessary debug symbols from native libraries. After that, you can compile your release build. When building the release version of your app, package uncompressed.
Disabling this flag prevents PackageManager from copying. Your APK might contain content that users download but never use, like additional language or per-screen-density resources. To ensure a minimal download for your users, you should upload your app to Google Play using Android App Bundles. If you're not publishing your app to Google Play, you can segment your app into several APKs, differentiated by factors such as screen size or GPU texture support.
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When a user downloads your app, their device receives the correct APK based on the device's features and settings. This way, devices don't receive assets for features that the devices don't have. Content and code samples on this page are subject to the licenses described in the Content License. App Basics. Build your first app. App resources. Resource types. App manifest file. App permissions. Device compatibility.
Multiple APK support. Adding wearable features to notifications. Creating wearable apps. Creating custom UIs. Sending and syncing data. Creating data providers. Creating watch faces. Android TV. Building TV Apps. Building TV playback apps. Helping users find content on TV.
Recommending TV content. Building TV channels. Android for Cars. Android Things. Developer kits. Advanced setup. Build apps. Create a Things app.
Comment alléger le poids d'un fichier docx ? - Microsoft Community
Communicate with wireless devices. Configure devices. Interact with peripherals. Build user-space drivers. Manage devices. Create a build. Push an update. Chrome OS devices. Core topics. Interact with other apps. Handling app links. App shortcuts. App widgets. Architecture Components. Data Binding Library. Paging Library. How-To Guides. Advanced Concepts. Threading in WorkManager. Intents and intent filters. User interface.
Improving layout performance. Custom view components. Look and feel. Add the app bar. Control the system UI visibility. Supporting swipe-to-refresh. Pop-up messages overview. Adding search functionality.
Optimiser les images existantes
Creating backward-compatible UIs. Media app architecture. Building an audio app.
Building a video app. Routing between devices.
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Background tasks. Sending operations to multiple threads. Manage device awake state. Save files on device storage. Save data in a local database. Sharing simple data. Sharing files. Sharing files with NFC. Printing files.
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Content providers. Autofill framework. Contacts provider. Data backup. Back up key-value pairs. Remember and authenticate users. The files produced by TinyPNG are displayed perfectly on all modern browsers including mobile devices. Still need to support Internet Explorer 6? It normally ignores PNG transparency and displays a solid background color. With TinyPNG the background becomes transparent again. Binary transparency without any workarounds! Only Microsoft Edge does not support the format yet.
Apple added animated stickers to iMessage with the release of iOS If you want to create and compress stickers under KB take a look at the iMessage Panda sticker example on Github. With other versions it is impossible and Photoshop CS5 cannot even display them properly. We frequently use PNG images, but were frustrated with the load times. We created TinyPNG in our quest to make our own websites faster and more fun to use with the best compression. Compressing images with the website is free for everyone and we like to keep it that way!
If you like TinyPNG please contribute by making a donation. We have not tried it out in other browsers. The site may work, or it may not.