Android 台灣中文網

標題: SearchView的Filter過濾 [打印本頁]

作者: Joey0210 時間: 2021-7-31 05:43
標題: SearchView的Filter過濾
各位大大好~想請問Filter過濾器的寫法，已經花好多天爬文找範例、改程式碼，但只要一輸入關鍵字，整個APP就會跳掉....

在想是不是除了過濾文字，圖片也需要過濾??

我是用ListView(圖片+文字)排列清單
另外建Adapter+Filter的class，用傳入資料的方式使用(因為有兩個以上ListView共用同個Adapter)

程式碼如下:
XML:
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
android:orientation="vertical"
android:background="#004B97"
tools:context=".MainActivity2">

<LinearLayout
      android:layout_width="match_parent"
      android:layout_height="match_parent"
      android:orientation="vertical">

      <LinearLayout
         android:id="@+id/linearLayout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal">

         <ImageButton
            android:id="@+id/btn"
            android:layout_width="57dp"
            android:layout_height="56dp"
            android:src="@drawable/back" />

         <TextView
            android:id="@+id/tex"
            android:layout_width="wrap_content"
            android:layout_height="56dp"
            android:layout_weight="1"
            android:background="#FFFCEC"
            android:gravity="center"
            android:text="@string/deepsea"
            android:textSize="40sp" />

         <SearchView
            android:id="@+id/sv"
            android:layout_width="wrap_content"
            android:layout_height="56dp" />

      </LinearLayout>

      <ListView
         android:id="@+id/lis"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content" />
</LinearLayout>

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity:
package com.example.demo01;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.graphics.Typeface;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SearchView;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.List;

public class MainActivity2 extends AppCompatActivity {
public TextView tex;
public ImageButton btn;
public ListView lis;
public SearchView sv;
public List<Integer> fish_ps = new ArrayList();
public List<String> fish_ns = new ArrayList<>();

@Override
protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main2);
      setTitle("呆丸魚仔");

      fish_ps.add(R.drawable.dp1);fish_ps.add(R.drawable.dp2);fish_ps.add(R.drawable.dp3);fish_ps.add(R.drawable.dp4);
      fish_ps.add(R.drawable.dp5);fish_ps.add(R.drawable.dp6);fish_ps.add(R.drawable.dp7);fish_ps.add(R.drawable.dp8);
      fish_ps.add(R.drawable.dp9);fish_ps.add(R.drawable.dp10);

      fish_ns.add("三鑽光魚");fish_ns.add("大西洋鑽光魚");fish_ns.add("小月燈魚");fish_ns.add("孔頭底尾鱈");
      fish_ns.add("日本扁鯊");fish_ns.add("長刀光魚");fish_ns.add("臺灣扁鯊");fish_ns.add("裸頭大尾鱈");
      fish_ns.add("寬咽魚");fish_ns.add("褶胸魚");

      tex = findViewById(R.id.tex);
      btn = findViewById(R.id.btn);
      lis = findViewById(R.id.lis);
      sv = findViewById(R.id.sv);
      adp adp01 = new adp(fish_ps,fish_ns);
      lis.setAdapter(adp01);
      lis.setTextFilterEnabled(true);

      sv = findViewById(R.id.sv);
      sv.setQueryHint("魚仔名");
      sv.setSubmitButtonEnabled(false);
      sv.setIconifiedByDefault(true);
      sv.requestFocusFromTouch();

      tex.setTypeface(
            Typeface.createFromAsset(getAssets(),"fonts/typeface01.ttf")
      );

      btn.setOnClickListener(new View.OnClickListener() {
         @Override
         public void onClick(View v) {
            Intent goback = new Intent(MainActivity2.this,MainActivity.class);
            startActivity(goback);
         }
      });

      sv.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
         @Override
         public boolean onQueryTextSubmit(String query) {
            return false;
         }

         @Override
         public boolean onQueryTextChange(String newText) {
            adp01.getFilter().filter(newText);
            return true;
         }
      });
}

}

另外建的Adapter+filter
package com.example.demo01;

import android.provider.UserDictionary;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.Filter;
import android.widget.Filterable;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.demo01.R;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.List;

public class adp extends BaseAdapter implements Filterable {
List<Integer> mIcons;
List<String> mWords;

public adp(List<Integer> Icons, List<String> Words) {
      mIcons.addAll(Icons);
      mWords.addAll(Words);
}

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

@Override
public Object getItem(int position) {
      return mIcons.get(position);
}

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

@Override
public View getView(int position, View convertView, ViewGroup parent) {
      if (convertView == null) {

         convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.listlayout01, null);
      }
      ImageView fish_ms = convertView.findViewById(R.id.lis_img);
      TextView fish_ds = convertView.findViewById(R.id.lis_tex);

      fish_ms.setImageResource(mIcons.get(position));
      fish_ds.setText(mWords.get(position));

      return convertView;
}

@Override
public Filter getFilter() {

      Filter filter = new Filter() {

         @Override
         protected FilterResults performFiltering(CharSequence constraint) {
            ArrayList<String> filWords = new ArrayList<>();

            if (constraint == null || constraint.length() == 0) {
                  filWords.addAll(mWords);
            } else {

                  for (String movie: mWords) {
                     if (movie.toLowerCase().contains(constraint.toString().toLowerCase())) {
                        filWords.add(movie);
                     }
                  }
            }

            FilterResults filterResults = new FilterResults();
            filterResults.values = filWords;

            return filterResults;
         }

         @Override
         protected void publishResults(CharSequence constraint, FilterResults results) {
            mWords.clear();
            mWords.addAll((Collection<? extends  String>) results.values);
            notifyDataSetChanged();

         }
      };
      return filter;
}
}

煩請各位高手指點迷津QQ

歡迎光臨 Android 台灣中文網 (https://apk.tw/)