Newbe Dev Stack

Answer : Under Tools > AVD Manager , select the "pencil" to get to "Virtual Device Configuration". Show Advanced Settings > Camera will give you the option of using emulated, or a device: Device - use host computer webcam or built-in camera If all you need is to get a still image into the camera, starting with Android Studio 3.2 you can put your static images into the virtual scene: as discussed in this entry from Android developers blog. Note that you'll need to move the camera position into the dining room to see your images (turn around and use Alt-w to move forward). Finally! Append to file ~/Android/Sdk/emulator/resources/Toren1BD.posters poster custom size 2 2 position 0 0 -1.8 rotation 0 0 0 default custom.png Place 'custom.png' in ~/Android/Sdk/emulator/resources/ Restart! emulator @Phone -no-snapshot -no-boot-anim (replace 'Phone' with the name of your avd! (see: emulator -list-avds) Profit! Now you have a...

Answer : This question is already answered, but I feel to clear something here in this topic. Most comments and answeres point out to use super.onBackPressed() and that this is the cause of the not working method onBackPressed() . But that is not correct and important to let other beginners know. The method onBackPressed() does not need to use super.onBackPressed() . onBackPressed() also works if somebody, for example, comment super.onBackPressed() out. As the questionier has written, he won´t use super.onBackPressed() because it will close the activity. So, the cause of this why it isn´t working, could be seperated into three possible causes: The Log doesn´t work because of a wrong filter in the logcat console The Toast dosn´t work because of the wrong passed context The OS is implemented wrong by the supplier. Usually, the toast works by passing the correct context. In the case of questioner, simply passing this . @Override public void onBackPressed() { Log.d...