Question

我在recyclerview中用编辑文本编写此代码以进行搜索，但是，当我运行该应用程序并在第一个字母中的编辑文本上输入需要搜索的文本时，recycler的内容不会更改，并且当我输入第二封信的RecyclerView变为空。如何过滤回收站？我的代码有什么问题？ xml代码：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".FamilyActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <EditText
            android:id="@+id/search"
            android:layout_width="294dp"
            android:layout_height="70dp"
            android:layout_marginTop="-20dp"
            android:hint="Search ..."
            android:drawableLeft="@drawable/ic_search_black_24dp"
            />

        <Button
            android:id="@+id/add"
            android:layout_width="54dp"
            android:layout_height="match_parent"
            android:layout_marginLeft="35dp"
            android:drawableTop="@drawable/ic_person_add_black_24dp"
            android:onClick="add_new_family"
            tools:ignore="OnClick" />
    </LinearLayout>



    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"


        android:layout_alignParentStart="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginStart="0dp"
        android:layout_marginLeft="0dp"
        android:layout_marginTop="50dp"></android.support.v7.widget.RecyclerView>

</RelativeLayout>

主要活动中的代码：

public class FamilyActivity extends AppCompatActivity {
    RecyclerView recyclerView;
    FamilyAdapter familyAdapter;
    Button add_family;
    EditText search;

    List<Family> familyList;
    String patientID = "";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_family);
        add_family=(Button)findViewById(R.id.add);
        search =(EditText)findViewById(R.id.search);

        familyList = new ArrayList<>();
        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        Bundle extras = getIntent().getExtras();
        if (extras != null) {
            patientID = extras.getString("ID");
        }
        loadFamilyList();
        //adding some items to our list

        //creating recyclerView adapter
        FamilyAdapter adapter = new FamilyAdapter(this, familyList);

        //setting adapter to recyclerView
        recyclerView.setAdapter(adapter);

        addTextListener();

    }

public void addTextListener(){

        search.addTextChangedListener(new TextWatcher() {

            public void afterTextChanged(Editable s) {}

            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

            public void onTextChanged(CharSequence query, int start, int before, int count) {

                query = query.toString().toLowerCase();

                final List<Family> filteredList = new ArrayList<>();

                for (int i = 0; i < familyList.size(); i++) {

                    final String text = familyList.get(i).toString().toLowerCase();
                    if (text.contains(query)) {

                        filteredList.add(familyList.get(i));
                    }
                }

                recyclerView.setLayoutManager(new LinearLayoutManager(FamilyActivity.this));
                FamilyAdapter fadapter = new FamilyAdapter(FamilyActivity.this,filteredList);
                recyclerView.setAdapter(fadapter);
                fadapter.notifyDataSetChanged();  // data set changed
            }
        });
    }

适配器中的代码：

public class FamilyAdapter extends RecyclerView.Adapter<FamilyAdapter.FamilyViewHolder> {

private Context context;
private List<Family> familyList;
private List<Family> familyListFull;

public FamilyAdapter(Context context, List<Family> familyList) {
    this.context = context;
    this.familyList = familyList;
    familyListFull=new ArrayList<>(familyList);
}

@NonNull
@Override
public FamilyViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
    LayoutInflater inflater = LayoutInflater.from(context);
    View view = inflater.inflate(R.layout.list_layout, null);
    return new FamilyViewHolder(view);

}

@Override
public void onBindViewHolder(FamilyViewHolder familyViewHolder, final int position) {
    Family family = familyList.get(position);
    familyViewHolder.textViewTitle.setText(family.getName());
    familyViewHolder.familyLayout.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Log.d(TAG, "onClick: clicked on : " + familyList.get(position));
            String name = familyList.get(position).getName();
            String num = familyList.get(position).getNum();
            Intent intent = new Intent(context, Chatting.class);
            intent.putExtra("num", num);
            intent.putExtra("name", name);
            context.startActivity(intent);


        }
    });
    familyViewHolder.deleteButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            final AlertDialog.Builder builder = new AlertDialog.Builder(context );
            builder.setTitle("Delete");
            builder.setMessage("Are you sure you want to delete this one ")
                    .setPositiveButton("YES", new DialogInterface.OnClickListener() {
                        @Override
                        public void onClick(DialogInterface dialog, int which) {
                            RemoveFamilyMember(position);
                        }
                    }).setNegativeButton("NO", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    builder.setCancelable(true);
                }
            });
            AlertDialog alert=builder.create();
            alert.show();


        }
    });


}

Answer 1

您可以尝试这样的操作，我认为这可能可行，但我尚未对其进行测试，但是我认为，每次edittext中包含某些内容时都制作一个新的适配器是一个坏主意。如果返回到查询等于“”空字符串的位置，则应将文件列表重新放入我没有放入的整个列表中

public class FamilyActivity extends AppCompatActivity {
    RecyclerView recyclerView;
    FamilyAdapter familyAdapter;
    Button add_family;
    EditText search;

    List<Family> familyList;
    List<Family> filteredList;
    String patientID = "";
    FamilyAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_family);
        add_family=(Button)findViewById(R.id.add);
        search =(EditText)findViewById(R.id.search);

        familyList = new ArrayList<>();
        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        Bundle extras = getIntent().getExtras();
        if (extras != null) {
            patientID = extras.getString("ID");
        }
        loadFamilyList();
        filteredList = new ArrayList<>(familyList);
        //adding some items to our list

        //creating recyclerView adapter
        adapter = new FamilyAdapter(this, filteredList);

        //setting adapter to recyclerView
        recyclerView.setAdapter(adapter);

        addTextListener();

    }

public void addTextListener(){

        search.addTextChangedListener(new TextWatcher() {

            public void afterTextChanged(Editable s) {}

            public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

            public void onTextChanged(CharSequence query, int start, int before, int count) {

                query = query.toString().toLowerCase();

                filteredList = new ArrayList<>();

                for (int i = 0; i < familyList.size(); i++) {

                    final String text = familyList.get(i).toString().toLowerCase();
                    if (text.contains(query)) {

                        filteredList.add(familyList.get(i));
                    }
                }
                                    recyclerView.removeAllViews();;
                                    adapter.notifyDataSetChanged();  // data set changed
            }
        });
    }

Answer 2

editTextSearch.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {

        }

        @Override
        public void onTextChanged(CharSequence s, int start, int before, int count) {

        }

        @Override
        public void afterTextChanged(Editable s) {
            filter(s.toString());

        }
    });

private void filter(String text) {
    ArrayList<Model> newList = new ArrayList<>();
    for (Model item : mModelList) {
        if (item.getTitle().contains(text)){
            newList.add(item);
        }
    }
    yourAdapter.setFilter(newList);
}

使用EditText在RecyclerView中搜索

2 个答案: