Pop-up messages overview. Adding search functionality. Creating backward-compatible UIs. Home channels for mobile apps. App widgets. Media app architecture. Building an audio app. Building a video app.
The Google Assistant. Routing between devices. Background tasks. Manage device awake state. Save to shared storage. Save data in a local database. Sharing simple data. Sharing files. Sharing files with NFC. Printing files. Content providers. Autofill framework. Contacts provider. Data backup. Remember and authenticate users. User location. Using touch gestures. Handling keyboard input. Supporting game controllers.
Input method editors. Performing network operations. Transmit network data using Volley. Perform network operations using Cronet. Transferring data without draining the battery. Reduce network battery drain. Transfer data using Sync Adapters. Bluetooth Low Energy. Wi-Fi infrastructure. Discover and connect. Runtime API reference. Web-based content. Android App Bundles. Google Play. Play Asset Delivery. Active Oldest Votes.
You only need internet permission. Nouman Ch Nouman Ch 3, 4 4 gold badges 29 29 silver badges 38 38 bronze badges. String This link may be useful: Save files on device storage. Misagh Misagh 2, 1 1 gold badge 15 15 silver badges 16 16 bronze badges. So first check if your user has given permission to use the storage: if checkSelfPermission android. Moradnejad Moradnejad 2, 2 2 gold badges 25 25 silver badges 50 50 bronze badges. Sign up or log in Sign up using Google.
Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Profile your app. Android Studio profilers. Profile CPU activity. Benchmark your app. Measure performance. Publish your app. Command line tools. Android Developers. Local networking limitations Android apps running in an emulator can connect to the network available on your workstation. This can cause some limitations: Communication with the emulated device may be blocked by a firewall program running on your machine.
Using network redirection To communicate with an emulator instance behind its virtual router, you need to set up network redirection on the virtual router.
Setting up redirection through the Emulator Console Each emulator instance provides a control console that you can connect to, to issue commands that are specific to that instance.
Next, connect to the console of the target emulator instance, specifying its console port number, as follows: telnet localhost Once connected, use the redir command to work with redirection. Setting up redirection through adb The Android Debug Bridge adb tool provides port forwarding, an alternate way for you to set up network redirection.
Using the emulator with a proxy On many corporate networks, direct connections to the internet don't work they're refused by the network administrators , except if they happen through a specific proxy. Interconnecting emulator instances To allow one emulator instance to communicate with another, you must set up the necessary network redirection as illustrated below.
Assume that your environment is A is your development machine B is your first emulator instance, running on A C is your second emulator instance, also running on A and you want to run a server on B, to which C will connect, here is how you could set it up: Set up the server on B, listening to Request url constructor.
It does a wrong validation. So if you specify an http url, it internally forwards it to https. I've tested it using my own server where we allow only secure connections. This can also be verified by opening an https url in browser using http - it will be automatically forwared to https site. I haven't tested that. It's good to know for specific situations in which you control the server, but there's no guarantee all or even most servers will be so configured, so it's not a general solution.
Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. Active Oldest Votes. Request downloadUri ; request. No, really. Dhaval Parmar Dhaval Parmar Illegalstate exeception unable to create directory — Dr.
Its work like a charm. This should be the accepted answer — Zubair Ahmed. DhavalParmar 's answer is bit confusing,because I tried it as a accepted answer but getting Illegalstate exeception unable to create directory. This is because to creating a directory users need to give a runtime permission. To take runtime permission you can follow this post [ stackoverflow.
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