Android ListView 错误的 Item 更新

Question

首先，我将解释我想要做什么，我将 post 下面的代码。我有一个蓝牙服务，一个带有自定义适配器的 ListView 和一个蓝牙服务的处理程序，如果 phone 已连接，它将通知 ||连接 ||与 BT 设备断开连接。

我的 ListView 包含附近的蓝牙设备，例如，单击项目标签时会更新，phone 将连接到该设备。

假设我有 2 个 BT 设备。如果我 select 第一个，第一个的标签将被更新（这是正确的）， 但是如果我 select 项目编号。 2，出于某种原因，它也更新了第一个标签 <- 这就是问题所在

我在我的应用程序中使用片段，ListViewAdapter 的代码和要更新的方法如下：

列表视图适配器代码：

public class BluetoothListViewAdapter extends ArrayAdapter<HashMap<String, String>>{

    Context ctx;
    private Activity activity;
    private ArrayList<HashMap<String, String>> data;
    private LayoutInflater inflater = null;
    CircularProgressButton Device = null;

    public BluetoothListViewAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
        super(a,R.layout.template_bluetooth_listview_element,d);

        ctx = a.getBaseContext();
        activity = a;
        data = d;
        inflater = (LayoutInflater) a.getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    }

    @Override
    public int getCount() {
        return data.size();
    }



    @Override
    public long getItemId(int position) {
        return position;
    }


    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
       String TAG;
       String MAC;

        View vi = convertView;

        if (vi == null)
            vi = inflater.inflate(R.layout.template_bluetooth_listview_element, null);

        Device = null;
        Device = (CircularProgressButton) vi.findViewById(R.id.CircularProgressButton_BluetoothListElement);



        HashMap<String, String> category = new HashMap<String, String>();
        category = data.get(position);

        TAG = (category.get("TAG"));
        MAC = (category.get("MAC"));

        Device.setText(TAG + "\n" + MAC);
        Device.setIdleText(TAG + "\n" + MAC);

        if(GlobalActivity.CurrentDeviceTAG.equals(TAG) && GlobalActivity.CurrentDeviceMAC.equals(MAC) && position == GlobalActivity.CurrentDevicePosition) { // if the selected device is the one i am connected

            if (GlobalActivity.BluetoothConnectionStatus == GlobalActivity.STATE_CONNECTED) {
                Device.setIndeterminateProgressMode(false);
                Device.setProgress(100); // -- update GUI Element
            }

            if (GlobalActivity.BluetoothConnectionStatus == GlobalActivity.STATE_NONE) {
                Device.setIndeterminateProgressMode(false);
                Device.setProgress(0); // -- update GUI Element
            }

        }

        return vi;
    }

}

蓝牙片段代码（位置保存在 public static int 中的连接尝试）：

public void BluetoothStateChanged(int position){
        Adapter.getView(position, null, null);
        Adapter.notifyDataSetChanged();
        BluetoothDeviceListView.setAdapter(Adapter);


    }

上述方法由蓝牙服务处理程序在状态更改时调用 - 此更新是 GUI 元素。

抱歉我的英语和解释不好。我有27小时没有睡觉。

我真的需要解决这个问题。

谢谢你的时间

根据要求更新 - 列表视图项目布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#424242">

    <com.dd.CircularProgressButton
        android:id="@+id/CircularProgressButton_BluetoothListElement"
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginTop="16dp"
        android:textColor="#FFFFFF"
        android:textSize="18sp"
        app:cpb_cornerRadius="48dp"
        app:cpb_iconComplete="@drawable/ic_action_accept"
        app:cpb_iconError="@drawable/ic_action_cancel"
        android:focusable="false"
        android:clickable="false" />

</LinearLayout>

Answer 1

您需要创建一个带有进度条的 class，并且每当您在 getView() 中创建一个视图时，将此容器 class 设置为标签。

见以下代码：

public class BluetoothListViewAdapter extends ArrayAdapter<HashMap<String, String>>{

    Context ctx;
    private Activity activity;
    private ArrayList<HashMap<String, String>> data;
    private LayoutInflater inflater = null;

    public BluetoothListViewAdapter(Activity a, ArrayList<HashMap<String, String>> d) {
        super(a,R.layout.template_bluetooth_listview_element,d);

        ctx = a.getBaseContext();
        activity = a;
        data = d;
        inflater = (LayoutInflater) a.getBaseContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    } 

    @Override 
    public int getCount() { 
        return data.size();
    } 



    @Override 
    public long getItemId(int position) {
        return position;
    } 


    @Override 
    public View getView(int position, View convertView, ViewGroup parent) {
       String TAG;
       String MAC;

        View vi = convertView;
        Holder holder;
        if (vi == null)
        {
            vi = inflater.inflate(R.layout.template_bluetooth_listview_element, null);
            holder.Device = (CircularProgressButton) vi.findViewById(R.id.CircularProgressButton_BluetoothListElement); 
            vi.setTag(holder);
        }
        else
            holder = (Holder) vi.getTag();


        HashMap<String, String> category = new HashMap<String, String>();
        category = data.get(position);

        TAG = (category.get("TAG"));
        MAC = (category.get("MAC"));

        holder.Device.setText(TAG + "\n" + MAC);
        holder.Device.setIdleText(TAG + "\n" + MAC);

        if(GlobalActivity.CurrentDeviceTAG.equals(TAG) && GlobalActivity.CurrentDeviceMAC.equals(MAC) && position == GlobalActivity.CurrentDevicePosition) { // if the selected device is the one i am connected

            if (GlobalActivity.BluetoothConnectionStatus == GlobalActivity.STATE_CONNECTED) { 
                holder.Device.setIndeterminateProgressMode(false);
                holder.Device.setProgress(100); // -- update GUI Element
            } 

            if (GlobalActivity.BluetoothConnectionStatus == GlobalActivity.STATE_NONE) { 
                holder.Device.setIndeterminateProgressMode(false);
                holder.Device.setProgress(0); // -- update GUI Element
            } 

        } 

        return vi;
    } 

    class Holder{
        CircularProgressButton Device;
    }
}

Answer 2

public void BluetoothStateChanged(){
        int start = BluetoothDeviceListView.getFirstVisiblePosition();
        for(int i = start, j = BluetoothDeviceListView.getLastVisiblePosition(); i<=j; i++) {
            View view = BluetoothDeviceListView.getChildAt(i - start);
            if ((BluetoothDeviceListView.getItemAtPosition(i)) != null) {
                BluetoothDeviceListView.getAdapter().getView(i, view, BluetoothDeviceListView); // Tell the adapter to update this view
            }

        }
    }

Android ListView 错误的 Item 更新

Android ListView wrong Item Update

android

listview

bluetooth

android-listview