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我知道通过使用意图过滤器-> ACTION_ACL_CONNECTED、ACTION_ACL_DISCONNECT_REQUESTED 和 ACTION_ACL_DISCONNECTED 可以为 WiFi 和蓝牙提供一些东西......但是一般来说，是否有一些东西可以检查是否已删除任何类型的连接设备。例如：我已将我的 Android 设备连接到我的 Mac，现在智能手机已锁定，我删除了与我的 Mac 的连接，我可以在这个方向触发本地推送或声音或其他东西......

更新

尝试了@Rajesh Gopu 的答案，看起来不错，但不幸的是没有工作:(

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    IntentFilter filter = new IntentFilter();
    filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
    filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
    registerReceiver(mUsbReceiver, filter); //register
    Toast.makeText(getApplicationContext(), "ON CREATE", Toast.LENGTH_LONG).show();

}

// BroadcastReceiver when insert/remove the device USB plug into/from a USB port
BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
    public void onReceive(Context context, Intent intent) {//get Event
        Toast.makeText(getApplicationContext(), "ON RECEIVE", Toast.LENGTH_LONG).show();

        String action = intent.getAction();
        System.out.println("BroadcastReceiver Event");
        if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {
            Toast.makeText(getApplicationContext(), "CONNECTED", Toast.LENGTH_LONG).show();
            System.out.println("BroadcastReceiver USB Connected");
        } else if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
            Toast.makeText(getApplicationContext(), "DISCONNECTED", Toast.LENGTH_LONG).show();
            System.out.println("BroadcastReceiver USB Disconnected");
        }
    }
};
}
4

1 回答 1

2

使用 Broadcaster 接收器，Android 系统通过广播通知内部事件。应用程序可以通过使用 broadcastrecever 注册操作来接收此信息。

以下是接收 USB 连接/断开连接事件的示例。

 IntentFilter filter = new IntentFilter();
filter.addAction(UsbManager.ACTION_USB_DEVICE_ATTACHED);
filter.addAction(UsbManager.ACTION_USB_DEVICE_DETACHED);
registerReceiver(mUsbReceiver, filter); //register  

  // BroadcastReceiver when insert/remove the device USB plug into/from a USB port  
  BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
  public void onReceive(Context context, Intent intent) {//get Event
    String action = intent.getAction();
    System.out.println("BroadcastReceiver Event");
    if (UsbManager.ACTION_USB_DEVICE_ATTACHED.equals(action)) {
        System.out.println("BroadcastReceiver USB Connected");
    } else if (UsbManager.ACTION_USB_DEVICE_DETACHED.equals(action)) {
        System.out.println("BroadcastReceiver USB Disconnected");
    }
  }

}

于 2016-10-20T12:38:57.720 回答