Why does my app crash after pressing button which makes buttons transparent, it says that Reading a NULL string not supported here.
lateinit var Button1: Button
lateinit var Button2: Button
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
Button1= view?.findViewById(R.id.btn1)
Button2 = view?.findViewById(R.id.btn2)
Button1?.setBackgroundColor(Color.TRANSPARENT)
Button2?.setBackgroundColor(Color.TRANSPARENT)
}
Logs
E/OplusCustomizeRestrictionManager: sInstance is null, start a new sInstance
E/libEGL: Invalid file path for libcolorx-loader.soE/libEGL: Invalid file path for libcolorx-loader.so
E/Parcel: Reading a NULL string not supported here.
E/ScreenmodeClient: display mode not support
Please help me quickly.
According to your code and exception you said, I think the button may be null, but you define it as lateinit, which means you create later but it can not be null.
Firstly you should make sure the buttons exist, then change the button defines as the following:
var Button1: Button? = null
var Button2: Button? = null
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
Button1= view?.findViewById(R.id.btn1)
Button2 = view?.findViewById(R.id.btn2)
Button1?.setBackgroundColor(Color.TRANSPARENT)
Button2?.setBackgroundColor(Color.TRANSPARENT)
}
```
the other way is not to use `?`, because the view has to exit.
```
lateinit var Button1: Button
lateinit var Button2: Button
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
Button1= view.findViewById(R.id.btn1)
Button2 = view.findViewById(R.id.btn2)
Button1.setBackgroundColor(Color.TRANSPARENT)
Button2.setBackgroundColor(Color.TRANSPARENT)
}
```
TRY this -
OPTION 1-
lateinit var button1: AppCompatButton
lateinit var button2: AppCompatButton
override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
super.onViewCreated(view, savedInstanceState)
button1 = view.findViewById(R.id.Button1)
button2 = view.findViewById(R.id.Button2)
button1.setBackgroundColor(Color.TRANSPARENT)
button2.setBackgroundColor(Color.TRANSPARENT)
}
Option 2- Simply add in button -
android:background="@null"
<androidx.appcompat.widget.AppCompatButton
android:id="@+id/Button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@null"
android:text="Button1" />