How does your phone know which way is down?

The Magic of Accelerometers As it turns out, a number of electronic devices these days (including smartphones, tablets and even laptops) have a sense of gravity designed into it and can therefore tell up from down, thanks to a device called an accelerometer.

What happens on screen rotation Android?

Background. When you rotate your device and the screen changes orientation, Android usually destroys your application’s existing Activities and Fragments and recreates them. Android does this so that your application can reload resources based on the new configuration.

Why is auto rotate so bad?

There might be a reason that the G sensor and accelerometer sensor has lost their calibration, which is causing issues with the auto-rotate feature. The smartphone uses these sensors to know if the phone is in landscape mode or in portrait and shifts accordingly.

How does a mobile phone know which way is up?

The digital compass that’s usually based on a sensor called the magnetometer and provides mobile phones with a simple orientation in relation to the Earth’s magnetic field. As a result, your phone always knows which way is North so it can auto rotate your digital maps depending on your physical orientation.

What happens to an activity when the user rotates the screen?

The activity will still be destroyed and recreated on screen rotation, but you can specifically tell android not to destroy the Fragment using the setRetainInstance() method @Abdo mentioned.

What happens when screen is rotated?

When screen rotates, Android destroys the current activity and recreates it. Which means the Activity methods will be called in following order. When onCreate method is called we call setContentView(R. Thats all what happens when android screen rotates.

Why do some Android apps not rotate?

Cause of Android Screen Not Rotating The screen you’re using isn’t set to auto-rotate. Recent apps are interfering with auto-rotate. You’re touching the screen when you rotate. Your Android needs to be updated.

How does auto rotate work in mobile?

When this accessibility setting is on, the screen automatically rotates when you move your device between portrait and landscape. If you’re using TalkBack, you might want to turn off auto-rotate, since rotating the screen can interrupt spoken feedback.

How does proximity sensor work in mobile phones?

The proximity sensor detects when a user is holding the phone near their face during a call and turns off the display to prevent keypad presses and battery consumption from the display. The proximity/light sensor is located to the right of the earpiece.

How do you set the screen rotation on an iPhone?

Press the “Rotation” button, which is the grey button on the left side of the menu bar. This will immediately enable screen rotation, allowing your iPhone screen to rotate as you hold it at different angles.

How do I rotate my iPhone screen?

Tap your iPhone’s Home button. Usually, you can rotate the screen on your iPhone simply by disabling the default rotation lock, then turning the iPhone on its side. You can also tap your iPhone’s Lock button, since your goal here is to “wake up” your iPhone’s screen.

How do I Stop my iPhone from rotating screen?

Here’s how to stop your iPhone screen rotating: swipe up from the bottom of the screen to show the dash screen You will see a lot of controls, including volume, brightness, music controls and others under the icons for WiFi, Bluetooth and airplane mode you will see the padlock icon click the padlock icon to toggle the orientation lock

How do you enable rotation?

Enable Rotation. Enabling this setting allows the screen to flip as you rotate the screen. Use two fingers to swipe the status bar down from the top of the screen. Tap the “Auto rotate” button to unhighlight it and enable rotation.

https://www.youtube.com/watch?v=tS-8Jk_Jp4M