如何在Android Studio中而不是文本视图中为列表视图编码

Question

我正在尝试开发一个Android应用程序。在我的应用中，我使用文本视图显示可用的BLE设备。但是我不想使用文本视图，而是要使用列表视图。我的代码需要进行哪些更改？我对如何使用列表视图和各种适配器感到困惑！ 在这里，我提供了我的代码。

MainActivity

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.example.nc.android.MainActivity">

     <TextView
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="Hello Bluetooth Scanners!" />

     <Button
         android:layout_width="100dp"
         android:layout_height="50dp"
         android:text="Scan"
         android:id="@+id/StartScanButton"
         android:layout_marginTop="40dp"/>

     <Button
         android:layout_width="wrap_content"
         android:layout_height="50dp"
         android:text="Stop Scanning"
         android:id="@+id/StopScanButton"
         android:layout_marginTop="40dp"/>

     <TextView
         android:layout_width="match_parent"
         android:layout_height="match_parent"
         android:layout_marginTop="100dp"
         android:id="@+id/PeripheralTextView"
         android:scrollbars="vertical"
         android:maxLines="30" />

 </RelativeLayout>

activity_main.xml

pip install opencv-python=3.3.0.9

Answer 1

 public ArrayList<model_> countries_lang = new ArrayList<model_>();
 Adapter_search adapt;

在您的理由后

  adapt = new Adapter_search(getActivity(), yourdata);

  lv.setAdapter(adapt);

适配器类

public class Adapter_search extends BaseAdapter 

Context c;
ArrayList<model_> players;
CustomFilter filter;
ArrayList<model_> filterList;
SessionManager session;
boolean isSet;

Adapter_search myAdapter;

private int selectedPosition = 0;

public Adapter_search(Context ctx, ArrayList<model_> players) {
    // TODO Auto-generated constructor stub

    this.c = ctx;
    this.players = players;
    this.filterList = players;
    session = new SessionManager(c);
}

@Override
public int getCount() {
    // TODO Auto-generated method stub
    return players.size();
}

@Override
public Object getItem(int pos) {
    // TODO Auto-generated method stub
    return players.get(pos);
}

@Override
public long getItemId(int pos) {
    // TODO Auto-generated method stub

   /* int itemID;

    // orig will be null only if we haven't filtered yet:
    if (players == null)
    {
        itemID = pos;
    }
    else
    {
        itemID = players.indexOf(filterList.get(pos));
    }
    return itemID;*/
    return players.indexOf(getItem(pos));
}

@Override
public View getView(final int pos, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub

    myAdapter = new Adapter_search(c, players);

    LayoutInflater inflater = (LayoutInflater) 
c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {
        convertView = inflater.inflate(R.layout.search_popup, null);
    }

    TextView nameTxt = (TextView) convertView.findViewById(R.id.textView_titllename);
    final ImageView img = (ImageView) convertView.findViewById(R.id.tick);


    //SET DATA TO THEM
    nameTxt.setText(players.get(pos).getLangName());






    convertView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {



            notifyDataSetChanged();


            //  Toast.makeText(c, players.get(pos).getLangName() + "+" + 
players.get(pos).getid(), Toast.LENGTH_SHORT).show();




        }
    });

    return convertView;
}



}

}