我做了一个自定义的Listview和Listviewadapter。不知何故,同一数据在Listview中多次显示,但我不知道为什么。
我尝试对其进行调试,但似乎并没有对其进行两次添加。
如您所见,我使用.contains控制了适配器的输入,但这无济于事。
private BroadcastReceiver BR_BT_Device= new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action_BR_BT_Device= intent.getAction();
if(action_BR_BT_Device.equals(BluetoothDevice.ACTION_FOUND))
{
BluetoothDevice device =
intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (!device.equals(null)) {
String sDevice_Address = device.getAddress();
if (!(sDevice_Address == null)) {
if (device.getName() == null){
mDeviceName = "Kein Name";
}
else {
mDeviceName = device.getName();
}
cBT_DeviceList mDevice = new
cBT_DeviceList(mDeviceName, sDevice_Address);
if (!(cBT_popup.mBTDevice.contains(mDevice))) {
cBT_popup.mBTDevice.add(mDevice);
cBT_popup.cBTDeviceListAdapter.notifyDataSetChanged();
}
}
}
Log.d("Resiver", "onReceive: "+device.getAddress());
}
}
};
public class cBT_popup extends MainActivity {
public static ArrayList<cBT_DeviceList> mBTDevice = new
ArrayList<cBT_DeviceList>();
public ListView lv_devices;
public static cBT_DeviceList_Adapter cBTDeviceListAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.bt_popup);
lv_devices = findViewById(R.id.lv_devices);
cBTDeviceListAdapter = new cBT_DeviceList_Adapter(this,
R.layout.lrv_bt_listview, mBTDevice);
lv_devices.setAdapter(cBTDeviceListAdapter);
lv_devices.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}
}
如果您需要更多信息,请告诉我。
如果这很重要:不可能突出显示所选项目,则不知道为什么。
´´´
IntentFilter BT_Device_filter =新
IntentFilter(BluetoothDevice.ACTION_FOUND);
´´´
答案 0 :(得分:1)
可能在同一蓝牙设备上多次调用onRecieve。
尝试一下...替换
if (!(cBT_popup.mBTDevice.contains(mDevice))) {
cBT_popup.mBTDevice.add(mDevice);
cBT_popup.cBTDeviceListAdapter.notifyDataSetChanged();
}
与
boolean alreadyExist = false;
for(cBT_DeviceList mBTDeviceObj : mBTDevice){
if(mDevice.getName().equals(mBTDeviceObj.getName())){
alreadyExist = true;
}
}
if (!alreadyExist) {
cBT_popup.mBTDevice.add(mDevice);
cBT_popup.cBTDeviceListAdapter.notifyDataSetChanged();
}