[General Questions and Answers] sanchill:
hei can anyone help me

i try build apk but got erro flutter

Warning: Mapping new ns http://schemas.android.com/repository/android/common/02 to old ns http://schemas.android.com/repository/android/common/01

Warning: Mapping new ns http://schemas.android.com/repository/android/generic/02 to old ns http://schemas.android.com/repository/android/generic/01

Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/02 to old ns http://schemas.android.com/sdk/android/repo/addon2/01

Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/02 to old ns http://schemas.android.com/sdk/android/repo/repository2/01

Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/02 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01

Warning: Mapping new ns http://schemas.android.com/repository/android/common/02 to old ns http://schemas.android.com/repository/android/common/01

Warning: Mapping new ns http://schemas.android.com/repository/android/generic/02 to old ns http://schemas.android.com/repository/android/generic/01

Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/02 to old ns http://schemas.android.com/sdk/android/repo/addon2/01

Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/02 to old ns http://schemas.android.com/sdk/android/repo/repository2/01

Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/02 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01

../../../../Downloads/flutter_windows_2.8.1-stable/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_math_fork-0.3.3+1/lib/src/widgets/selectable.dart:407:7: Error: The non-abstract class 'InternalSelectableMathState' is missing im

plementations for these members:

- TextSelectionDelegate.copySelection

- TextSelectionDelegate.cutSelection

- TextSelectionDelegate.pasteText

- TextSelectionDelegate.selectAll

Try to either

- provide an implementation,

- inherit an implementation from a superclass or mixin,

- mark the class as abstract, or

- provide a 'noSuchMethod' implementation.

class InternalSelectableMathState extends State<InternalSelectableMath>

^^^^^^^^^^^^^^^^^^^^^^^^^^^

../../../../Downloads/flutter_windows_2.8.1-stable/flutter/packages/flutter/lib/src/services/text_input.dart:985:8: Context: 'TextSelectionDelegate.copySelection' is defined here.

void copySelection(SelectionChangedCause cause);

^^^^^^^^^^^^^

../../../../Downloads/flutter_windows_2.8.1-stable/flutter/packages/flutter/lib/src/services/text_input.dart:965:8: Context: 'TextSelectionDelegate.cutSelection' is defined here.

void cutSelection(SelectionChangedCause cause);

^^^^^^^^^^^^

../../../../Downloads/flutter_windows_2.8.1-stable/flutter/packages/flutter/lib/src/services/text_input.dart:973:16: Context: 'TextSelectionDelegate.pasteText' is defined here.

Future<void> pasteText(SelectionChangedCause cause);

^^^^^^^^^

../../../../Downloads/flutter_windows_2.8.1-stable/flutter/packages/flutter/lib/src/services/text_input.dart:979:8: Context: 'TextSelectionDelegate.selectAll' is defined here.

void selectAll(SelectionChangedCause cause);

^^^^^^^^^

../../../../Downloads/flutter_windows_2.8.1-stable/flutter/.pub-cache/hosted/pub.dartlang.org/visibility_detector-0.2.0/lib/src/visibility_detector_layer.dart:276:21: Error: Too many positional arguments: 1 allowed, but 2 found.

Try removing the extra positional arguments.

super.addToScene(builder, layerOffset);