While trying to use ADB on a Linux Computer, I received the following error from “adb devices”
no permissions (user in plugdev group; are your udev rules wrong?);
Not exactly sure what causes the above error, but the information in the following Stack Exchange link was helpful.
I was able to get around the issue by putting the USB option to “File Transfer Mode” from the notifications menu
Restoring a Pixel to the factory image is a pretty straight forward operation if you are familiar with fastboot and adb. This guide assumes you have fastboot already installed and setup in your user path. If not you can refer to the following link for more information.
WARNING – THESE STEPS WILL DELETE ALL USER DATA OFF THE DEVICE.
https://developers.google.com/android/images#instructions
Go to the following link and download the Factory Image for your device
https://developers.google.com/android/images
Extract the file and then open a terminal or command prompt in that directory.
You can do this with “adb reboot recovery” or with the volume key to boot into the Android boot menu.
On Windows you can flash the firmware with
flash-all.bat
Or on Linux
./flash-all.sh
Should take it a couple of minutes to complete.
Next we can lock bootloader with
fastboot flashing lockYou will need to confirm the lock on your phone.
If you want the Negative button to not execute any command when clicked, you can specify null
.setNegativeButton("Cancel", null)
or if we want to run stuff when Cancel is clicked
.setNegativeButton("Cancel") { dialog, which ->
variable = true
Toast.makeText(this, "Cancel hit!", Toast.LENGTH_SHORT).show()}
.create()?.show()We can remove the border and shadows from a button by adding the following style code in your activity_main.xml file. Or what ever your XML file is.
style="?android:attr/borderlessButtonStyle"
Code for button. We are setting an image as the background.
<Button
android:id="@+id/button"
style="?android:attr/borderlessButtonStyle"
android:layout_width="48dp"
android:layout_height="48dp"
android:background="@drawable/gear"
android:onClick="launchSettings"
android:textSize="12sp"/>
Comparison of buttons. One on the left still has the shadow on it
More info here
https://stackoverflow.com/questions/28756035/how-to-remove-button-shadow-android
https://stackoverflow.com/questions/27867284/remove-shadow-effect-on-android-button/30856094
In Kotlin you can request if the WiFi adapter is on or off with the following code
This changes the text on a textbox, replace with your textbox.
wifiManager = this.applicationContext.getSystemService(Context.WIFI_SERVICE) as WifiManager
textBox.text = "WiFi State = ${wifiManager.wifiState}"
The important part is
wifiManager.wifiState
It will return a number from 0-4 which indicates if it is on or off.
0 = WiFi is being disabled
1 = WiFi Disabled
2 = WiFi is being enabled
3 = WiFi is Enabled
4 = Error
https://developer.android.com/things/hardware/wifi-adb
The following command will remove all saved networks from your Android Things devices.
adb shell am startservice -n com.google.wifisetup/.WifiSetupService -a WiFiSetupService.Reset
The problem is that the code in SettingsActivity is not tied to the settings_activity.xml file. So it is using the activity_main.xml instead. It does in fact switch activities, the header at the top shows that it is in the Settings, but it shows the same information on the Main Activity. Problem showed up after copying and pasting code.
Check the following line under the initial onCreate function
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main) // <-- Should be R.layout.settings_activityThe setContentView line should reflect the Layout XML file under res -> layout -> settings_activity.xml
You need to use a Theme.AppCompat theme (or descendant) with this activity.
Looks like if you get the above error resolved by adding the following to the Android Manifest file.
android:theme="@style/Theme.AppCompat.Light
val textBoxVar: TextView = findViewById(R.id.textBoxID) textBoxVar.text = "Hello World!"
val buttonVar: Button = findViewById(R.id.buttonID)
buttonVar.setOnClickListener {
buttonVar.text = "Button Pushed..." //Change text on button
}
val text = "Hello World! This is a toast message!" val duration = Toast.LENGTH_SHORT val toast = Toast.makeText(applicationContext, text, duration) toast.show()
You’ll need to install and setup adb and then run the following commands. Change ipaddress to the ip address of the device running Android Things
adb connect ipaddress adb root adb remount adb push bootanimation.zip /system/media/ adb reboot
bootanimation.zip will either need to be in the same directory as adb, or you can specify the path. For example if it is located on your Desktop you can use
For Windows
adb push \Users\username\Desktop\bootanimation.zip /system/media/
on Linux or MacOS
adb push ~/Desktop/bootanimation.zip /system/media/