Mtk Droid Root Amp; Tools

[Lorna Schildt]

Iset the android_sdk_home variable so that my application could find .android when trying to run. Now I get an error stating that "android_sdk_root is undefined". I am running win 7 with a new installation of Android Studio, inside parallels on a macbook pro.

Thank you for your response. I checked the location and it is identified as the same location as the ANDROID_SDK_HOME environment path. It still says root is undefined. I created an ANDROID_SDK_ROOT enviroment path to the same location and it is still undefined.

In Android Studio 3.2.1 I got this error because I installed a new API(28) level emulator without installing that API SDK components. After I installed SDK platform and SDK platform tools for the API level 28 and updated Android Emulator the emulator started running.

I followed this tutorial to set up my android environment variables I was on mac and I had all the required environmental variable setup and working already. but i was still getting this error that requires environment ANDROID_SDK_ROOT.

A common mistake that people tend to make when setting the root is capitalization errors in the path, or accidental spacing. Hence, I would recommend you check that. If that does not solve it, then check if the folder you are linking to still exists, or was accidentally moved into the trash.

To be clear, if you're having this same issue the problem is probably an out-of-date SDK. As of 4.2.2 there is a security feature that requires you to confirm the RSA fingerprint of the connecting device. Open the SDK manager and update the tools! Then reboot.

The thing that fixed it for me was to upgrade the SDK platform-tools to r16.0.1. For me, this version was not displayed in my SDK Manager, so I pulled it down from -tools_r16.0.1-windows.zip directly.

I hit the same issue on a Nexus 7 running 4.2.2 OTA update. I'm almost certain I had an ADB connection over USB and Wi-Fi after the update until it just stopped working. To fix, I updated my SDK using:

For anyone wondering about 4.2.2, there is a security question that appears on the phone requesting RSA verification with the PC. Be sure your tools are updated AND you allow the PC access by verifying the security question on the devices in question. This fixed it for me.

If your device normally connects over USB, but suddenly stops working, especially after the USB cable has been disconnected and reconnected, try the following non-invasive steps before doing some of the more drastic things mentioned in the other answers:

If your device is listed with 'offline' next to it, try restarting the device. The ADB daemon on the device will occasionally get hung. I've noticed this more when I've disconnected the cable while LogCat is running and after switching back from connecting via Wi-Fi or Ethernet.

Another problem I was having was that I was trying to connect ADB over Wi-Fi, which is my only option because the USB ports on my Mac are really finnicky. Unfortunately, ADB over Wi-Fi doesn't show the security question in 4.2.2, so you need to find a USB cable that'll work and connect over USB at least once to accept the security question, but after you do that once, you can connect over Wi-Fi.

Then in the developer options, get into the "Wireless ADB" feature, if you're not already there yet. Go to "Pair using PIN" or similar. There, a IP and port will pop up in a dialog, together with a pin. Connect to the phone using:

To verify that it worked, run 'adb version' before and after the commands and make sure it is the latest. The reason for the adb kill-server command is that it it most likely running, and it can't be updated while it is running, so you have to kill it first.

Finally I ended up with just doing the ADB stuff over the LAN. The setting was right next to the USB Debug setting and in ADB it can be activated with "adb connect [IPADDRESS]:[PORT]". The port was 5555 on my phone.

One more possibility for people with flaky ADB connections, and if they're on a Mac and have Android File Transfer installed: I found that file transfer was interfering with my ADB connection, causing it to stop working intermittently.

I have a dodgy USB connection so I tried to get wifi connectivity going. Tried basically everything here, but one thing I did not try until last, and suddenly it worked! So, if you end up stuck, try these steps:

Sweet! I don't know exactly if forcing it to restart USB mode then TCP/IP in sequence helped, or just the last three commands, but clearly it started working. I also found there's a Developer Option to Enable Debugging on Wifi, and you select your hotspot. That may also prevent it working, so check that as well.

If you've previously authorized the RSA fingerprint of your PC and tried adb kill-server etc. with no luck, your problem might just be that you're trying to connect to it while it's locked. Try pressing the screen-on button and entering your pattern - this fixed it for me.

The reason for a device to be reported as offline is that adb can not connect to it. Adb executable from the development environment creates a connection (socket) with the device under control. The device has a service (daemon) that listens for this communication. The daemon is called adbd (as in adbdaemon).When one enables adb on a device in fact one starts this daemon, so comms can be established with the device.

When the device is reported by adb as offline is because the daemon is not running anymore or is in a state that will not accept connections. Most often than not this happens if the network goes down on an active (network) connection.

This isn't really an Arch question... but you need android-sdk and android-sdk-platform-tools. You might just need the platform tools... but I ahve both, and haven't really don't much to figure out what I do and don't need. But the platform-tools package has fastboot and adb, which are the two most commonly used tools for flashing and whatnot.

You could also try to use an ssh server on the phone, sshfs on arch and "adb forward" to forward a local port to your android device.

Edit: Don't forget to remount /system as writable. For smaller changes it si easier to use adb, though. Just create the directory structure locally and use adb push or adb sync

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Rooting is the process of unlocking or jailbreaking a device, such as a smartphone or tablet. It most commonly refers to android devices. A rooted device gives the user much more freedom to customize the device and achieve more administrative control. Phone carriers and hardware manufacturers often place limitations on these devices for security reasons. A rooted device allows a user to change the operating system (OS), replace or alter settings and system applications, install custom themes, and download specialized apps. Rooting an android device can cause a myriad of issues, including rendering the phone useless if it is done wrong, losing data, and allowing access for malware. Rooting a phone makes you a superuser, giving you admin privileges, but it can also void the warranty and cause damage to the device. While rooting a phone is currently legal, it is usually not recommended unless you have significant technical knowledge.

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The goal of the approach is to prevent the problem from reoccurring by eliminating its source. It can also be an excellent opportunity for teams to gain insights into their processes and help prevent future problems.

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