Android使用clipboardManager获取clipData但它总是返回null

Question

这是我的代码：

ClipboardManager clipboardManager = (ClipboardManager)accessibilityService.getSystemService(Context.CLIPBOARD_SERVICE);
        if(clipboardManager != null){
            ClipData clipData = clipboardManager.getPrimaryClip();
            if(clipData != null){
                return text.toString();
            }
        }

clipData 始终为空。哪里不对了？ 我的安卓设备是华为，搭载 Android 10 和 Android Studio 4.1

Answer 1

使用 Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Exception ignored in: <function _ProactorBasePipeTransport.__del__ at 0x00000204B17CBCA0> Traceback (most recent call last): File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 116, in __del__ self.close() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\proactor_events.py", line 108, in close self._loop.call_soon(self._call_connection_lost, None) File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 746, in call_soon self._check_closed() File "C:\Users\david\AppData\Local\Programs\Python\Python39\lib\asyncio\base_events.py", line 510, in _check_closed raise RuntimeError('Event loop is closed') RuntimeError: Event loop is closed Process finished with exit code 0 将文本复制到剪贴板并使用 clipboard.getPrimaryClip().getItemAt(0).getText() 将文本复制到剪贴板。这将返回 null，因为可能是文本未成功复制到剪贴板。

ClipData.newPlainText("label", "Text to copy")