onTouch()方法没有显示任何用法

Question

我正在尝试从图像中获取像素颜色，以便匹配颜色并从片段开始活动。有人能帮我吗？这是我的代码和信息

Answer 1

请查看下面的代码以了解更多详细信息。

public class SampleFragment extends Fragment implements View.OnTouchListener {
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_explore, container, false);
view.setOnTouchListener(this);
return view;
}
@Override
public boolean onTouch(View v, MotionEvent event) {
Rect rectangle = new Rect();
Window window = Objects.requireNonNull(getActivity()).getWindow();
window.getDecorView().getWindowVisibleDisplayFrame(rectangle);
int statusBarHeight = rectangle.top;
int contentViewTop = window.findViewById(Window.ID_ANDROID_CONTENT).getTop();
int titleBarHeight = contentViewTop - statusBarHeight;

final int action = event.getAction();
final int evX = (int) event.getX();
final int evY = (int) event.getY();
switch (action) {
case MotionEvent.ACTION_UP:
int touchColor = getHotspotColor(R.id.image_areas, evX, evY - statusBarHeight);
if (touchColor == Color.parseColor("ff9933")) {
/*Intent intent = new Intent(getActivity(), IndiaFragment.class);
startActivity(intent);*/
//TODO: IndiaFragment.class should be activity class not fragment
}
break;
}
return true;
}
public int getHotspotColor(int hotspotId, int x, int y) {
ImageView img = Objects.requireNonNull(getView()).findViewById(hotspotId);
img.setDrawingCacheEnabled(true);
Bitmap hotspot = Bitmap.createBitmap(img.getDrawingCache());
img.setDrawingCacheEnabled(false);
return hotspot.getPixel(x, y);
}
}

如果这不起作用，那么发布您的整个代码。