If you don't include resources for a specific screen density, Android automatically scales existing resources originally designed for other screen densities. We recommend that every app include at least an xxhdpi image variant. For more information screen densities, see Screen Sizes and Densities.
Some images don't require a static image resource; the framework can dynamically draw the image at runtime instead. In addition, XML Drawable objects produce monochromatic images compliant with material design guidelines. You can include a separate resource for variations of an image, such as tinted, shaded, or rotated versions of the same image. We recommend, however, that you reuse the same set of resources, customizing them as needed at runtime.
Android provides several utilities to change the color of an asset, either using the android:tint and tintMode attributes on Android 5.
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. 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 code shrinking 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. When building your app using Android Gradle plugin 3.
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. 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.
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Active 6 months ago. Viewed 4k times. OKAY [ 0. OKAY [ What's the problem? Can I make system partition larger? Please help. Edit: I have the latest adb version. Improve this question. I installed the latest fastboot from android. You cannot make the system partition larger, nor should you have to It sounds like you are not flashing the correct system image to the device. Forums New posts Search forums. What's new New posts Latest activity. Log in Register. Search titles only. Search Advanced search….
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You should upgrade or use an alternative browser. Solved Message Content is too large. Joined Apr 14, Messages 64 Reaction score 1. So i'm trying to send someone in my class some notes she missed, and when I take a picture of said notes and try sending them, it says the message content is too large!
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