If you're attempting to use Apps in your workplace, a successful connection may not always be possible. If you're connected to a public Wi-Fi network like at a hotel or coffee shop , they may have network restrictions preventing you from being able to connect. If you see an error indicating your PC couldn't connect to your Android device, it could be for a variety of reasons. Here are few things to try:. Battery Saver is turned Off.
Airplane mode is turned Off. Check that your system accounts are working correctly. If there are no issues with your account, there will be a message on the screen letting you know things are working correctly.
If there is an issue with your account, select Fix now to start resolving it. For some Android devices, your Battery Optimization settings may interrupt your connection.
We recommend turning it off for the companion app on your Android device either Your Phone Companion or Link to Windows.
Here's how to turn it off based on which companion app you have:. Scroll down to Your Phone Companion and select Don't optimize. Select All from the drop-down list, scroll to find Link to Windows service , and turn the toggle Off. Usually this means your Android device and PC have lost the connection to each other. In order to run APK files on your computer, you need an emulator — more on them below.
First, you need to find an APK for your app. If no luck, use a different website from Google results. Once you downloaded the APK file of the app on your computer, install it using an emulator see below or you may want to transfer it to your Android device to install it. When transferred, simply locate and click the file, and the installation should begin shortly.
In rare instances of software glitches, a reboot can get things up and running again. Connect your iPhone to the charging cable. The error message will appear, so dismiss or ignore it. Next, turn on the Airplane mode in your device.
Turn off your iPhone and wait for 1 minute and turn it on again. You should be able to download an app now. If you are trying to download free apps that is. This is a very common problem with the Google Play Store while downloading the apps when your storage is almost full.
You can download the Android Size Analyzer plugin using the plugin marketplace in Android Studio, as shown in figure 1. To open the plugin marketplace and install the plugin, proceed as follows:.
Figure 1. The Android Size Analyzer plugin in the Marketplace tab. After analyzing your project, a tool window appears with recommendations on how to reduce the size of your app, as shown in figure 2. Figure 2. The Android Size Analyzer plugin tool window with recommendations. After extracting the archive, run the size-analyzer script on Linux or MacOS or the size-analyzer.
Before discussing how to reduce the size of your app, it's helpful to understand the structure of an app's APK. These files include Java class files, resource files, and a file containing compiled resources.
An APK also contains the following files. Among them, only AndroidManifest. The size of your APK has an impact on how fast your app loads, how much memory it uses, and how much power it consumes. One of the simple ways to make your APK smaller is to reduce the number and size of the resources it contains. In particular, you can remove resources that your app no longer uses, and you can use scalable Drawable objects in place of image files.
This section discusses these methods as well as several other ways that you can reduce the resources in your app to decrease the overall size of your APK. When the lint tool discovers a potentially unused resource in your project, it prints a message like the following example.
Also, it doesn't remove resources; it only alerts you to their presence. Libraries that you add to your code may include unused resources. Gradle can automatically remove resources on your behalf if you enable shrinkResources in your app's build.
To use shrinkResources , you must also enable code shrinking. During the build process, R8 first removes unused code. Then, the Android Gradle plugin removes the unused resources.
For more information about code and resource shrinking, and other ways Android Studio helps you reduce APK size, see Shrink, obfuscate, and optimize your app. In Android Gradle Plugin 0. Gradle passes this information to the build system using the resConfig and resConfigs flavors and the defaultConfig option.
The build system then prevents resources from other, unsupported configurations from appearing in the APK, reducing the APK's size. For more information about this feature, see Remove unused alternative resources. When developing an Android app, you usually use external libraries to improve your app's usability and versatility. For example, you might reference the Android Support Library to improve the user experience on older devices, or you could use Google Play Services to retrieve automatic translations for text within your app.
To include only the parts of the library that your app needs, you can edit the library's files if the license allows you to modify the library. You can also use an alternative, mobile-friendly library to add specific functionality to your app.
Note: code shrinking can clean up some of a library's unnecessary code, but it might not be able to remove some large internal dependencies. When it was introduced in Android 11, this API decoded only the first image from animations in these formats. Use ImageDecoder instead of third-party libraries to further decrease APK size and benefit from future updates related to security and performance. Android supports a very large set of devices, encompassing a variety of screen densities.
In Android 4. Although Android supports all these densities, you don't need to export your rasterized assets to each density.
If you know that only a small percentage of your users have devices with specific densities, consider whether you need to bundle those densities into your app. 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.
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