Why do values in input field lose after rotating device?
You need to set an ID for each field, so that when the device is rotated, fields will be filled back correctly
Why does the app crash when rotating the device
If an AsyncTask is run in background, it will run independently with Activity. When rotating the device, Activity is destroyed but AsyncTask does not.So, when AsyncTask finishes, it will try to update former Activity which no longer exist. This makes the app crash
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