具有动态搜索结果的Android ListView显示错误的结果

时间：2013-10-24 22:16:03

标签： android listview

用英语解释我的问题非常困难，但我会尝试。

我有一个ListView，它应该显示搜索的结果。当我在搜索字段中输入“d”时，我应该显示所有以“d”开头的结果。

问题是，它没有向我显示正确的结果。它显示了原始列表中的第一个条目，而不是目标条目，但它显示了正确的数字条目。

当我在ArrayList中有这个条目时：

防 Beta版 三角洲 脏 回声 十一 地球

并在搜索字段中输入“d”，它显示了2次点击（这是正确的），但它显示了我的Anti和Beta。当我输入“e”时，它显示3次点击（这是正确的），但它显示我反，Beta和Delta。

这是MainActivity：

package de.resper.pzcrettungsdienstkassel;

import java.util.ArrayList;
import java.util.HashMap;

import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends Activity {
  ArrayList<HashMap<String, Object>> haupt;
  ArrayList<HashMap<String, Object>> code;
  ArrayList<HashMap<String, Object>> codeResult;
  ListView codeListView;
  LayoutInflater inflater;

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

        codeListView = (ListView) findViewById(R.id.listsearch);

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

        final EditText searchBox=(EditText) findViewById(R.id.searchBox);

        sql_helper db = new sql_helper(getApplicationContext());

        code = new ArrayList<HashMap<String,Object>>();
      code = db.getAllCode();

      codeResult = new ArrayList<HashMap<String,Object>>();

      final CustomAdapterCode adapter_code = new CustomAdapterCode(this, R.layout.activity_main, codeResult);
      codeListView.setAdapter(adapter_code);

      searchBox.addTextChangedListener(new TextWatcher() {
        public void onTextChanged(CharSequence s, int start, int before, int count) {
          //get the text in the EditText
          String searchString=searchBox.getText().toString();
          int textLength=searchString.length();

          codeResult.clear();

          for(int i=0;i<code.size();i++){
            String name=code.get(i).get("name").toString();
            if(textLength<=name.length()){
              if(searchString.equalsIgnoreCase(name.substring(0,textLength))){
                codeResult.add(code.get(i));
                    Log.d("Suchfeld", String.valueOf(i));
                    Log.d("Suchfeld", code.get(i).get("name").toString());
              }
            }
          }

          adapter_code.notifyDataSetChanged();
        }
        public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
        public void afterTextChanged(Editable s) {}
      });
    }

  private class CustomAdapterCode extends ArrayAdapter<HashMap<String, Object>> {
    public CustomAdapterCode(Context context, int textViewResourceId, ArrayList<HashMap<String, Object>> Strings) {
      super(context, textViewResourceId, Strings);
    }
    private class ViewHolder{
      TextView code_id, code_layout, name_layout, prio1, prio2, prio3;
    }

    ViewHolder viewHolder;

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
      if(convertView==null){
        convertView=inflater.inflate(R.layout.code_list_item, null);
        viewHolder=new ViewHolder();

        viewHolder.code_id=(TextView) convertView.findViewById(R.id.code_id);
        viewHolder.code_layout=(TextView) convertView.findViewById(R.id.code_layout);
        viewHolder.name_layout=(TextView) convertView.findViewById(R.id.name_layout);
        viewHolder.prio1=(TextView) convertView.findViewById(R.id.prio1);
        viewHolder.prio2=(TextView) convertView.findViewById(R.id.prio2);
        viewHolder.prio3=(TextView) convertView.findViewById(R.id.prio3);

        convertView.setTag(viewHolder);

      } else {
        viewHolder=(ViewHolder) convertView.getTag();
      }

      viewHolder.code_id.setText(code.get(position).get("_id").toString());
      viewHolder.code_layout.setText(code.get(position).get("code").toString());
      viewHolder.name_layout.setText(code.get(position).get("name").toString());
      viewHolder.prio1.setText(code.get(position).get("prio1").toString());
      viewHolder.prio2.setText(code.get(position).get("prio2").toString());
      viewHolder.prio3.setText(code.get(position).get("prio3").toString());

      return convertView;
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate the menu; this adds items to the action bar if it is present.
      getMenuInflater().inflate(R.menu.main, menu);
      return true;
  }
}

这是我的sql_helper：

package de.resper.pzcrettungsdienstkassel;

import java.util.ArrayList;
import java.util.HashMap;

import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteOpenHelper;
import android.database.sqlite.SQLiteDatabase;


public class sql_helper extends SQLiteOpenHelper {
  private static final String DATABASE_FILE_NAME="pzc";
  private static final int SCHEMA_VERSION=1;

  public sql_helper(Context context) {
    super(context, DATABASE_FILE_NAME, null, SCHEMA_VERSION);
  }

  @Override
  public void onCreate(SQLiteDatabase db) {
    db.execSQL("CREATE TABLE pzc_haupt (_id INTEGER PRIMARY KEY, name TEXT, unter INTEGER);");
    db.execSQL("CREATE TABLE pzc_unter (_id INTEGER PRIMARY KEY, name TEXT, haupt INTEGER);");
    db.execSQL("CREATE TABLE pzc_code (_id INTEGER PRIMARY KEY,code INTEGER, name TEXT, unter INTEGER, haupt INTEGER, prio1 INTEGER, prio2 INTEGER, prio3 INTEGER);");
    db.execSQL("INSERT INTO pzc_code (_id,code,name,unter,haupt,prio1,prio2,prio3) VALUES ('1','124','Anti','0','1','1','0','0');");
    db.execSQL("INSERT INTO pzc_code (_id,code,name,unter,haupt,prio1,prio2,prio3) VALUES ('2','130','Beta','0','1','1','0','0');");
    db.execSQL("INSERT INTO pzc_code (_id,code,name,unter,haupt,prio1,prio2,prio3) VALUES ('3','201','Delta','1','0','1','1','0');");
    db.execSQL("INSERT INTO pzc_code (_id,code,name,unter,haupt,prio1,prio2,prio3) VALUES ('4','202','Dirty','1','0','1','1','0');");
    db.execSQL("INSERT INTO pzc_code (_id,code,name,unter,haupt,prio1,prio2,prio3) VALUES ('5','203','Echo','2','0','1','1','0');");
    db.execSQL("INSERT INTO pzc_code (_id,code,name,unter,haupt,prio1,prio2,prio3) VALUES ('6','204','Eleven','2','0','1','1','0');");
    db.execSQL("INSERT INTO pzc_code (_id,code,name,unter,haupt,prio1,prio2,prio3) VALUES ('7','205','Earth','3','0','1','1','0');");
  }

  @Override
  public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
  }

  public ArrayList<HashMap<String,Object>> getAllHaupt() {
    ArrayList<HashMap<String,Object>> hauptList = new ArrayList<HashMap<String,Object>>();
    String selectQuery = "SELECT  * FROM pzc_haupt";
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery(selectQuery, null);
    HashMap<String , Object> haupt;
    if (cursor.moveToFirst()) {
      do {
        haupt = new HashMap<String, Object>();
        haupt.put("_id", Integer.parseInt(cursor.getString(0)));
        haupt.put("name", cursor.getString(1));
        hauptList.add(haupt);
      } while (cursor.moveToNext());
    }
    return hauptList;
  }

  public ArrayList<HashMap<String,Object>> getAllCode() {
    ArrayList<HashMap<String,Object>> codeList = new ArrayList<HashMap<String,Object>>();
    String selectQuery = "SELECT  * FROM pzc_code ORDER BY _id ASC";
    SQLiteDatabase db = this.getWritableDatabase();
    Cursor cursor = db.rawQuery(selectQuery, null);
    HashMap<String , Object> code;
    if (cursor.moveToFirst()) {
      do {
        code = new HashMap<String, Object>();
        code.put("_id", Integer.parseInt(cursor.getString(0)));
        code.put("code", Integer.parseInt(cursor.getString(1)));
        code.put("name", cursor.getString(2));
        if (Integer.parseInt(cursor.getString(5)) == 1) {
          code.put("prio1", "\u25CF");
        } else {
          code.put("prio1", "");
        }
        if (Integer.parseInt(cursor.getString(6)) == 1) {
          code.put("prio2", "\u25CF");
        }else{
          code.put("prio2", "");
        }
        if (Integer.parseInt(cursor.getString(7)) == 1) {
          code.put("prio3", "\u25CF");
        } else {
          code.put("prio3", "");
        }
        codeList.add(code);
      } while (cursor.moveToNext());
    }
    return codeList;
  }
}

activity_main.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
  <LinearLayout
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:orientation="vertical" >
       <EditText
           android:id="@+id/searchBox"
          android:layout_height="wrap_content"
          android:layout_width="fill_parent"
          android:layout_margin="10dp"
          android:hint="@string/suche">
    </EditText>
      <ListView
          android:id="@+id/listsearch"
          android:layout_width="fill_parent"
          android:layout_height="wrap_content" >
      </ListView>
      <View
          android:layout_width="fill_parent"
          android:layout_height="2dp"
          android:background="#000000"
          android:layout_marginBottom="10dp" />
  </LinearLayout>
</LinearLayout>

code_list_item.xml：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:orientation="horizontal"
    android:padding="10dp" >

    <TextView android:id="@+id/code_id"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:visibility="gone" />
     <TextView
        android:id="@+id/prio1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="22sp"
        android:textColor="#FF0000" />
     <TextView
        android:id="@+id/prio2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="22sp"
        android:textColor="#FFFF00" />
     <TextView
        android:id="@+id/prio3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="22sp"
        android:textColor="#40FF00" />
     <TextView
        android:id="@+id/code_layout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
      android:textSize="14sp"
      android:textColor="#000000" />
    <TextView
        android:id="@+id/name_layout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textSize="14sp"
        android:textColor="#000000"
        android:layout_marginLeft="5dp" />
</LinearLayout>

我不使用ListActivity，因为我想在此活动中再构建一个ListView。

1 个答案:

答案 0 :(得分：3)

您没有在getView方法中使用codeResult。您正在使用原始code数组。如下所示，使用code更改codeResult。你的问题将得到解决。

        viewHolder.code_id.setText(codeResult.get(position).get("_id").toString());
        viewHolder.code_layout.setText(codeResult.get(position).get("code").toString());
        viewHolder.name_layout.setText(codeResult.get(position).get("name").toString());
        viewHolder.prio1.setText(codeResult.get(position).get("prio1").toString());
        viewHolder.prio2.setText(codeResult.get(position).get("prio2").toString());
        viewHolder.prio3.setText(codeResult.get(position).get("prio3").toString());
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