android - TextView's text disappearing when device rotated

Question

I am writing a phone dialer app for android. I created a layout for keypad, which contains a TextView and 10 buttons. Buttons are as keys for 10 digits(0 to 9) and TextView is for displaying the number according to keys pressed.

In my app, i am appending the text ("0" or "1", etc.) to the TextView for each button pressed. If i pressed the buttons 1, 2, 3 then the text on TextView is 123. The problem is, let's take the screen is in landscape mode and TextView contains 123, if i turn it, in portrait mode no text on TextView.

Please Help Me Regarding this.

Answer 1

What @jeet recommended didn't work for me. I had to add "screenSize". This is the line you should add in your manifest.xml in the <activity> node of your activity:

android:configChanges="keyboardHidden|orientation|screenSize"

Thus, the complete node may look like this:

<activity
android:name=".YourActivity"
android:label="@string/app_name"
android:configChanges="keyboardHidden|orientation|screenSize"
android:theme="@style/AppTheme.NoActionBar">