Java 无法在片段类中解析方法registerReceiver（android.content.BroadcastReceiver，android.content.IntentFilter）

您可以在片段中执行此操作：

//here my code
//used this IntentFilter

IntentFilter filter = new IntentFilter();

filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);

//this method cannot be resolve

registerReceiver(mReceiver, filter);

---

registerReceiver

是在

Context

类中找到的方法<代码>片段不会扩展它，但是

活动

会扩展它。这就是为什么你可以这样使用它：

getActivity().registerReceiver(receiver, filter);

registerReceiver.(receiver, filter);

在活动中，但必须在片段的上下文中调用它，如下所示：

getActivity().registerReceiver(receiver, filter);

registerReceiver.(receiver, filter);

或者更适合于

onAttach

getActivity().registerReceiver(receiver, filter);