在使用存储在 JSON 上的 ID 进行 SearchView 过滤后，如何从 ListView 打开 Activity

Posted 2023-04-19

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【中文标题】在使用存储在 JSON 上的 ID 进行 SearchView 过滤后，如何从 ListView 打开 Activity【英文标题】：How can I open a Activity from a ListView after SearchView filter using an ID stored on a JSON 【发布时间】：2019-11-10 20:37:00 【问题描述】：

我是 java 新手，我正在做一个应用程序来完成我的大学。这个应用程序在从 JSON 获取数据的 ListView 上有一个 SearchView 过滤。我几乎完成了，但我在过滤器部分之后卡住了。

在 SearchBar 上输入并过滤返回结果后，我无法打开从 JSON 获取 ID 的新意图。我只能使用位置 ListView 编号打开意图（由于过滤过程，这对我的需要不起作用）。

下图准确地显示了问题： Image

所以我的必要性是：使用存储在 JSON 中的 ID 打开一个意图，以避免过滤结果后更改位置 ID 的问题。

我不知道如何解决这个问题。

豆子：

public class Model 
private String description;
private int id;

public Model(int id, String description) 
    this.setId(id);
    this.setDescription(description);


public String getDescription() 
    return description;


public void setDescription(String description) 
    this.description = description;


public int getId() 
    return id;


public void setId(int id) 
    this.id = id;

主要：

public class MainActivity extends Activity implements SearchView.OnQueryTextListener, SearchView.OnCloseListener 

private ListView list;
private ListViewAdapter adapter;
private SearchView editsearch;
public static ArrayList<Model> modelArrayList = new ArrayList<Model>();

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

    list = (ListView) findViewById(R.id.listview);
    loadDataJSON();

    adapter = new ListViewAdapter(this);
    list.setAdapter(adapter);

    editsearch = (SearchView) findViewById(R.id.search);
    editsearch.setOnQueryTextListener(this);

    list.setOnItemClickListener(new AdapterView.OnItemClickListener() 
        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) 
            int a = position;
            Intent myIntent = new Intent(MainActivity.this, Info.class);
            myIntent.putExtra("valor", a);
            startActivity(myIntent);
        
    );


public String loadJSON(String arq) 
    String json = null;
    try 
        InputStream is = getAssets().open(arq);
        int size = is.available();
        byte[] buffer = new byte[size];
        is.read(buffer);
        is.close();
        json = new String(buffer, "UTF-8");
     catch (IOException ex) 
        ex.printStackTrace();
        return null;
    
    return json;




private void loadDataJSON() 
    String arquivo = loadJSON("lista.json");
    try 
        JSONObject obj = new JSONObject(arquivo);
        JSONArray a = obj.getJSONArray("locais");
        for (int i = 0; i < a.length(); i++) 
            JSONObject item = a.getJSONObject(i);
            Model model = new Model(item.getInt("id"),item.getString("description"));
            modelArrayList.add(model);
        
     catch (JSONException e) 
        throw new RuntimeException(e);
    


@Override
public boolean onQueryTextSubmit(String query) 

    return false;


@Override
public boolean onQueryTextChange(String newText) 
    String text = newText;
    adapter.filter(text);
    return false;


@Override
public boolean onClose() 
    // TODO Auto-generated method stub
    return false;

适配器：

public class ListViewAdapter extends BaseAdapter 

Context mContext;
LayoutInflater inflater;
public ArrayList<Model> arraylist;

public ListViewAdapter(Context context ) 
    mContext = context;
    inflater = LayoutInflater.from(mContext);
    this.arraylist = new ArrayList<Model>();
    this.arraylist.addAll(MainActivity.modelArrayList);


public class ViewHolder 
    TextView name;


@Override
public int getCount() 
    return MainActivity.modelArrayList.size();


@Override
public Model getItem(int position) 
    return MainActivity.modelArrayList.get(position);


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


public View getView(final int position, View view, ViewGroup parent) 
    final ViewHolder holder;
    if (view == null) 
        holder = new ViewHolder();
        view = inflater.inflate(R.layout.listview_item, null);
          holder.name = (TextView) view.findViewById(R.id.name);
        view.setTag(holder);
     else 
        holder = (ViewHolder) view.getTag();
    
    holder.name.setText(MainActivity.modelArrayList.get(position).getDescription());
    return view;



public void filter(String charText) 
    charText = charText.toLowerCase(Locale.getDefault());
    MainActivity.modelArrayList.clear();
    if (charText.length() == 0) 
        MainActivity.modelArrayList.addAll(arraylist);
     else 
        for (Model mp : arraylist) 
            if (mp.getDescription().toLowerCase(Locale.getDefault()).contains(charText)) 
                MainActivity.modelArrayList.add(mp);
            
        
    
    notifyDataSetChanged();

信息：

public class Info extends Activity 

TextView aaa, bbb;

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

    aaa = (TextView) findViewById(R.id.aaa);
    bbb = (TextView) findViewById(R.id.bbb);

    Intent mIntent = getIntent();
    int id = mIntent.getIntExtra("valor",0);

    String arquivo = loadJSON("lista.json");

    try 
        JSONObject obj = new JSONObject(arquivo);
        JSONArray a = obj.getJSONArray("locais");
        JSONObject item = a.getJSONObject(id);

        aaa.setText(item.getString("id"));
        bbb.setText("Base: "+item.getString("description"));

     catch (JSONException e) 
        throw new RuntimeException(e);
    



public String loadJSON(String arq) 
    String json = null;
    try 
        InputStream is = getAssets().open(arq);
        int size = is.available();
        byte[] buffer = new byte[size];
        is.read(buffer);
        is.close();
        json = new String(buffer, "UTF-8");
     catch (IOException ex) 
        ex.printStackTrace();
        return null;
    
    return json;

JSON：