Android - SearchView 过滤 RecyclerView 中显示的 Assets 文件夹中的 JSON

Answer 1

我自己得到了它，如果有人需要，我会分享解决方案：

适配器

public class AdapterSearchJSON extends RecyclerView.Adapter<AdapterSearchJSON.myViewHolderSearchJSON> {

Context context;
ArrayList<String> lang1;
ArrayList<String> lang2;

public AdapterSearchJSON(Context context, ArrayList<String> lang1, ArrayList<String> lang2) {

    this.context = context;
    this.lang1 = lang1;
    this.lang2 = lang2;
}

public void updateData(ArrayList<String> lang1, ArrayList<String> lang2){
    this.lang1 = lang1;
    this.lang2 = lang2;
    notifyDataSetChanged();
}

@NonNull
@Override
public myViewHolderSearchJSON onCreateViewHolder(@NonNull ViewGroup parent, int viewType) {

    View vJSON = LayoutInflater.from(parent.getContext()).inflate(R.layout.search_results_row, parent, false);
    return new myViewHolderSearchJSON(vJSON);
}

@Override
public void onBindViewHolder(@NonNull myViewHolderSearchJSON holder, int position) {

    holder.italian.setText(lang1.get(position));
    holder.indonesian.setText(lang2.get(position));
}

@Override
public int getItemCount() {
    return lang1.size();
}

public class myViewHolderSearchJSON extends RecyclerView.ViewHolder {
    TextView italian, indonesian;

    public myViewHolderSearchJSON(@NonNull View itemView) {
        super(itemView);

        italian = itemView.findViewById(R.id.firstLanguage);
        indonesian = itemView.findViewById(R.id.italian);
    }

}}

搜索活动

public class SearchActivityJSON extends AppCompatActivity {

RecyclerView recyclerView;
AdapterSearchJSON adapterSearchJSON;
Button button_logout;
ArrayList<String> lang1;
ArrayList<String> lang2;

String searchStr = "";

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

    Toolbar toolbar = findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    Objects.requireNonNull(getSupportActionBar()).setTitle("");

    lang1 = new ArrayList<>();
    lang2 = new ArrayList<>();

    recyclerView = findViewById(R.id.recyclerviewId);
    recyclerView.setLayoutManager(new LinearLayoutManager(this));
    recyclerView.setHasFixedSize(true);

    adapterSearchJSON = new AdapterSearchJSON(this, lang1, lang2);
    recyclerView.setAdapter(adapterSearchJSON);

    button_logout = findViewById(R.id.button_logout);

    addItemFromJSON();

    final Handler handler = new Handler(Looper.getMainLooper());
    handler.postDelayed(new Runnable() {
        @Override
        public void run() {
            //Do something after 100ms
            searchStr = "";
            addItemFromJSON();
            adapterSearchJSON.updateData(lang1,lang2);

        }
    }, 100);

    //intent back button
    button_logout.setOnClickListener(view -> {
        Intent intent = new Intent(SearchActivityJSON.this, HomeActivity.class);
        startActivity(intent);
    });
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    getMenuInflater().inflate(R.menu.menu_item, menu);
    MenuItem item = menu.findItem(R.id.searchId);
    SearchView searchView = (SearchView) item.getActionView();

    searchView.setIconifiedByDefault(true);
    searchView.setFocusable(true);
    searchView.setIconified(false);
    searchView.requestFocusFromTouch();

    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {

        @Override
        public boolean onQueryTextSubmit(String newText) {
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {

            searchStr = newText;
            addItemFromJSON();
            adapterSearchJSON.updateData(lang1,lang2);

            return true;
        }
    });
    return true;
}

private String loadJSONfromAssets() {
    String json;
    try {
        InputStream is = getAssets().open("assetPhrasebook.json");
        int size = is.available();
        byte[] buffer = new byte[size];
        is.read(buffer);
        is.close();

        json = new String (buffer, StandardCharsets.UTF_8);

    } catch (IOException e) {
        e.printStackTrace();
        return null;
    }
    return json;
}

private void addItemFromJSON() {

    ArrayList<String> lang1t = new ArrayList<>();
    ArrayList<String> lang2t = new ArrayList<>();

    try {

        String name = "";

        String jsonString = loadJSONfromAssets();

        assert jsonString != null;
        JSONObject json = new JSONObject(jsonString);
        JSONArray m_Array = json.getJSONArray("CommonWords");
        for (int i = 0; i < m_Array.length(); i++) {
            JSONObject inside = m_Array.getJSONObject(i);
            if (inside.getString("italian").trim().toLowerCase().contains(searchStr.trim().toLowerCase()))
            {
                lang1t.add(inside.getString("italian"));
                lang2t.add(inside.getString("indonesian"));
            }
        }         

        this.lang1 = lang1t;
        this.lang2 = lang2t;

    } catch (Exception e) {
        e.printStackTrace();
    }
}}

使用安全！