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/
https://developer.android.com/things/hardware/raspberrypi
Download the Console Tools from the following link. You will need to sign into your Google account.
https://partner.android.com/things/console/#/tools
Unzip the file and Launch the correct utility for your OS.
On Windows you will need to launch as administrator by right clicking on the Windows Application and Run as administrator.
The program is easy to follow along with and automatically downloads and creates the SD card for the Pi.
After you are finished, put the card in the Pi and boot it up.
You will need an Android Terminal. You can turn on the default one in the developer settings. Need to turn on developer mode?
You will also need to enable root which can also be done in the Developer settings
Open up the terminal app and run
su
rpi3-audio-jack.sh
More info here
Note: Some of these notes were saved in a draft and going off of memory. May not be entirely complete.
Basic steps to flash the factory Android image back onto a Google Pixel 1
You can download the full OTA image from
https://developers.google.com/android/ota
Go to https://twrp.me/Devices and download the correct version TWRP for your device.
Boot into boot loader menu
Plug you phone into a computer that has fastboot installed and run
sudo fastboot boot Downloads/twrp-3.3.0-0-sailfish.img
Note you may need to unlock your boot loader.
Your phone should now boot up into TWRP
Swipe to Allow Modifications
Select advanced
Then hit ADB Sideload.
Swipe to start the sideload and then sideload from your computer
adb sideload image.zip
More detailed explaination
https://www.cyanogenmods.org/adb-sideload-twrp/
Start by powering down phone.
Once it is powered off, press the Volume Down and Power button and hold until it turns on.
You should get the boot menu.
Installing GrapheneOS is pretty well documented on the website.
https://grapheneos.org/install
The following are mainly some of my notes. More detailed instructions are available at the above link.
To enable the developer options on Android go to Settings -> About phone -> Tap on Build number until it says your a Developer.
Settings -> System -> Advanced (Dropdown) -> Developer options
Allow OEM unlocking
Boot into the bootloader By
Run the following command from a computer with fastboot
sudo fastboot flashing unlock
The screen should change, hit the arrow keys to select Unlock the bootloader and confirm with the power button
Download the proper factory image and files from https://grapheneos.org/releases
The name should say something device-factory-date.zip and device-factory-date.zip.sig
The .sig file is used to verify the image in the below section.
Verify the Keys
The commands to do this are from a Linux computer. There may be alternatives for Windows. You can technically skip this section.
Install signify
sudo apt install signify-openbsd -y
Download the public key from https://releases.grapheneos.org/factory.pub
Run and check that the key and the image match.
The following command assumes you are in the same directory as the image and factory.pub file.
sudo signify-openbsd -Cqp factory.pub -x blueline-factory-2020.03.04.16.zip.sig && echo verified
Unzip the factory image and change directories into it
unzip blueline-factory-2020.03.04.16.zip && cd blueline-qq2a.200305.002/
Run the flash script to flash the image to your Pixel.
sudo ./flash-all.sh
Wait for it to flash, may take a long time.
NOTE: I ran into issues with the script as my version of fastboot was old. SEE PROBLEMS HEADING BELOW
Boot back up into the recovery menu and lock the boot loader with
fastboot flashing lock
On the phone enable Developer options. More info here.
Find the “OEM unlocking” button and enable.
Reboot phone to bootloader.
Plug phone into computer and computer run
sudo fastboot flashing unlock
Use the buttons on the phone to select and enable unlocking.