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过滤器搜索在Android

2013-04-02 242 views
0

我正在做一个过滤器搜索到我的列表视图。我的列表视图代码执行得很好。我把一个edittext对象，我会做过滤器搜索。我怎样才能做到这一点？我的代码如下。过滤器搜索在Android

package com.nexum.imageloadingromjson; 


    public class MainActivity extends Activity { 

private ListView list; 
private MyAdapter adapter; 

private final String parsingUrl = "someurl"; 
private String tag_coord = "Coord"; 
private String tag_lat = "Lat";// Double 
private String tag_lon = "Lon";// Double 
private String tag_image = "Image"; 
private String tag_InIzmir = "InIzmir";// Boolean 
private String tag_name = "Name"; 
private ImageLoader imageLoader; 
private EditText filteredittext; 

private ProgressDialog pDialog; 

private static int clickedItemPosition = -1; 
private final int REQUEST_CODE_DETAIL = 1; 

ArrayList<CoordItem> items; 
ArrayList<CoordItem> filterlist; 

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

    items = new ArrayList<CoordItem>(); 
    filterlist = new ArrayList<CoordItem>(); 
    adapter = new MyAdapter(this, R.layout.list_item, items); 

    list = (ListView) findViewById(R.id.exampList); 
    list.setAdapter(adapter); 
    list.setTextFilterEnabled(true); 

    filteredittext = (EditText)findViewById(R.id.filtersearchedittext); 

    filteredittext.addTextChangedListener(new TextWatcher() { 

     @Override 
     public void onTextChanged(CharSequence s, int start, int before, int count) { 
      viewitems.clear(); 
      String search = filteredittext.getText().toString(); 

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

       if(items.get(i).name.equals(search)){ 
        viewitems.add(items.get(i)); 
        adapter.notifyDataSetChanged(); 
       } 

      } 


     } 

     @Override 
     public void beforeTextChanged(CharSequence s, int start, int count, 
       int after) { 
      // TODO Auto-generated method stub 

     } 

     @Override 
     public void afterTextChanged(Editable s) { 
      // TODO Auto-generated method stub 

     } 
    }); 

    pDialog = new ProgressDialog(this); 
    pDialog.requestWindowFeature(Window.FEATURE_NO_TITLE); 
    pDialog.setMessage("Veriler alınıyor..."); 

    new ListViewLoad().execute(); 



    list.setOnItemClickListener(new OnItemClickListener() { 

     @SuppressLint("ShowToast") 
     @Override 
     public void onItemClick(AdapterView<?> a, View v, int position, 
       long id) { 
      /* 
      * String bulunma = ""; if (items.get(position).inIzmir) { 
      * bulunma+="İzmir de bulundu."; }else{ 
      * bulunma+="İzmir de bulunmadı."; } String 
      * s="Name:"+items.get(position).name+"\nInIzmir:"+bulunma; 
      * Toast.makeText(getApplicationContext(), s, 
      * Toast.LENGTH_LONG).show(); 
      */ 

      clickedItemPosition = position; 
      Intent myIntent = new Intent(MainActivity.this, 
        DetailActivity.class); 
      Bundle bundle = new Bundle(); 
      bundle.putParcelable(
        "parcelable_key", 
        new CoordItem(items.get(position).name, items 
          .get(position).img, items.get(position).lat, 
          items.get(position).lon, 
          items.get(position).inIzmir)); 
      myIntent.putExtras(bundle); 
      // Güncelleme olayı burada baÅŸlıyor 
      // startActivityForResult(myIntent, REQUEST_CODE_DETAIL); 

      startActivityForResult(myIntent, REQUEST_CODE_DETAIL); 

     } 

    }); 

} 

@Override 
protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    // TODO Auto-generated method stub 
    super.onActivityResult(requestCode, resultCode, data); 

    if (requestCode == REQUEST_CODE_DETAIL && resultCode == RESULT_OK 
      && data != null) { 
     CoordItem coorditem = new CoordItem(data.getStringExtra("name"), 
       items.get(clickedItemPosition).img, Double.parseDouble(data 
         .getStringExtra("lat")), Double.parseDouble(data 
         .getStringExtra("lon")), 
       items.get(clickedItemPosition).inIzmir); 

     items.set(clickedItemPosition, coorditem); 
     adapter.notifyDataSetChanged(); 
     Toast.makeText(getApplicationContext(), "Guncelleme yapıldı.", 
       Toast.LENGTH_SHORT).show(); 
    } 


} 

private class ListViewLoad extends AsyncTask<Void, Void, Void> { 

    @Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     pDialog.show(); 
    } 

    @Override 
    protected Void doInBackground(Void... params) { 

     String json = getStringFromURL(parsingUrl); 
     try { 
      final JSONArray jArray = new JSONArray(json); 

      for (int i = 0; i < jArray.length(); i++) { 
       JSONObject c = jArray.getJSONObject(i); 
       JSONObject coord = c.getJSONObject(tag_coord); 
       double lat = coord.getDouble(tag_lat); 
       double lon = coord.getDouble(tag_lon); 
       String image = c.getString(tag_image); 
       boolean InIzmir = c.getBoolean(tag_InIzmir); 
       String name = c.getString(tag_name); 

       CoordItem item = new CoordItem(name, image, lat, lon, 
         InIzmir); 
       items.add(item); 
      } 

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

     return null; 
    } 

    @Override 
    protected void onPostExecute(Void result) { 
     super.onPostExecute(result); 

     adapter.notifyDataSetChanged(); 

     pDialog.dismiss(); 
    } 

} 

private class MyAdapter extends ArrayAdapter<CoordItem> { 

    private LayoutInflater inflater; 

    public MyAdapter(Context context, int textViewResourceId, 
      ArrayList<CoordItem> objects) { 
     super(context, textViewResourceId, objects); 



     imageLoader = ImageLoader.getInstance(); 
     imageLoader.init(ImageLoaderConfiguration.createDefault(context)); 
     this.inflater = (LayoutInflater) context 
       .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    } 

    @Override 
    public int getCount() { 
     if (items != null) 
      return items.size(); 
     else 
      return 0; 
    } 

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

     ViewHolder viewholder = null; 

     if (convertView == null) { 
      viewholder = new ViewHolder(); 

      convertView = inflater.inflate(R.layout.list_item, parent, 
        false); 
      viewholder.listItemImage = (ImageView) convertView 
        .findViewById(R.id.listItemImage); 

      viewholder.listItemName = (TextView) convertView 
        .findViewById(R.id.listItemName); 
      viewholder.listItemInIzmir = (TextView) convertView 
        .findViewById(R.id.listItemInIzmir); 
      viewholder.listItemLatitude = (TextView) convertView 
        .findViewById(R.id.listItemLatitude); 
      viewholder.listItemLongitude = (TextView) convertView 
        .findViewById(R.id.listItemLongitude); 
      convertView.setTag(viewholder); 
     } else { 
      viewholder = (ViewHolder) convertView.getTag(); 
     } 

     viewholder.listItemName.setText(items.get(position).name); 
     if (items.get(position).inIzmir) { 
      viewholder.listItemInIzmir.setText("Izmirde."); 
     } else { 
      viewholder.listItemInIzmir.setText("Izmirde degil."); 
     } 



     DisplayImageOptions options = new DisplayImageOptions.Builder().delayBeforeLoading(1000).build(); 
     imageLoader.displayImage(items.get(position).img,viewholder.listItemImage,options); 

     return convertView; 
    } 

    public Drawable getDrawableFromUrl(URL url) { 
     try { 
      InputStream is = (InputStream) url.getContent(); 
      Drawable d = Drawable.createFromStream(is, "src"); 
      return d; 
     } catch (Exception e) { 
      return null; 
     } 
    } 

} 
static class ViewHolder { 
    ImageView listItemImage; 
    TextView listItemName, listItemInIzmir, listItemLatitude, 
      listItemLongitude; 
} 

public String getStringFromURL(String url) { 

    // Making HTTP request 
    String json = ""; 
    InputStream is = null; 
    try { 
     // defaultHttpClient 
     DefaultHttpClient httpClient = new DefaultHttpClient(); 
     HttpPost httpPost = new HttpPost(url); 

     HttpResponse httpResponse = httpClient.execute(httpPost); 
     HttpEntity httpEntity = httpResponse.getEntity(); 
     is = httpEntity.getContent(); 

    } catch (UnsupportedEncodingException e) { 
     e.printStackTrace(); 
    } catch (ClientProtocolException e) { 
     e.printStackTrace(); 
    } catch (IOException e) { 
     e.printStackTrace(); 
    } 

    try { 
     BufferedReader reader = new BufferedReader(new InputStreamReader(
       is, "UTF-8"), 8); 
     StringBuilder sb = new StringBuilder(); 
     String line = null; 
     while ((line = reader.readLine()) != null) { 
      sb.append(line + "\n"); 
     } 
     is.close(); 
     json = sb.toString(); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } 

    // return JSON String 
    return json; 

}

}

必须我写什么在这些代码onTextChanged方法？我研究过，但我没有找到这个类的代码。或者我没有编辑。

来源

2013-04-02 emrerme

回答

0

请用下面的代码尝试。

you must integrate this line .. where you are setting adapter . 

listView.setAdapter(new MyAddapter(this)); 

        array_sort.clear(); 
        array_sort.addAll(Service_Listitems);

然后使用下面的行。

edittext_search.addTextChangedListener(new TextWatcher(){ 
        public void afterTextChanged(Editable s) { 

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




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

         try { 
Service_Listitems.clear();// Clear your arraylist initially 

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

            if (array_sort.get(i) instanceof yourServiceSetterGetterClass) { 
             yourServiceSetterGetterClass cp1 = (yourServiceSetterGetterClass)array_sort.get(i); 

     String strOrig = ""; 
     if (cp1.getFirstName() == null) { 
strOrig = ""; 
    } else { 
    strOrig = cp1.getFirstName().toUpperCase().trim(); 
} 
String str = edittext_search.getText().toString().toUpperCase().trim(); 
if (strOrig.startsWith(str)) {        Service_Listitems.add(cp1); 
} 
} 
} 

listView.setAdapter(new MyAddapter(this)); 

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

        } 
       });;

编辑

ArrayList<CoordItem> Service_Listitems= new ArrayList<CoordItem>(); 

private ArrayList<Object> array_sort = new ArrayList<Object>();

，或者你可以使用像下面还

private ArrayList<CoordItem> array_sort = new ArrayList<CoordItem>();

来源

2013-04-02 09:14:13 itsrajesh4uguys

+0

Service_listitems是我filterlist ArrayList对象是不是？ – emrerme

+0

ArrayList Service_Listitems private ArrayList array_sort = new ArrayList （）; 或者您也可以使用下面的样子 private ArrayList array_sort = new ArrayList （）; – itsrajesh4uguys

+0

我可以使用项目ArrayList对象而不是Service_Listitems对象吗？ – emrerme

0

搜索列表视图上点击此处查看链接。

How can I filter ListView data when typing on EditText in android

如果你想进行自定义搜索，你可以使用下面

代码activity_main.xml中

<?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"> 
<EditText 
android:id="@+id/search" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content"/> 
<ListView 
android:id="@+id/list" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content"/> 
</LinearLayout>

主要活动

public class MainActivity extends Activity { 
ArrayList<NewData> mTemp=new ArrayList<NewData>(); //temporary list for search data 
ArrayList<NewData> mPostingData=new ArrayList<NewData>(); //data to post in listview 
ArrayList< NewData> mOri = new ArrayList<NewData>() ;//original data 
    // You can have two arraylist instead of three. 1. for original values 2. one for search result. 


Myadapter ma; 
EditText search; 

NewData nd; 

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


     for(int i = 0; i < 20; i++) 
     { 
      // Add your Json Parsed Data here 
      // each item from json add it to hash map in NewData class. Arraylist of 0 contains jsondata of customer1 
      nd=new NewData(); 

      nd.newDatacus.put(NewData.TAG_CUSTOMER_CODE, "i"+i); 
      nd.newDatacus.put(NewData.TAG_CUSTOMER_NAME, "a"+i); 
      nd.newDatacus.put(NewData.TAG_CUSTOMER_MOBILE, "number"); 
      nd.newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS, "address"); 
      mOri.add(nd); 
     } 

    ma= new Myadapter(MainActivity.this); 
    mPostingData=mOri; 
    mTemp=mOri; 
    ListView lv= (ListView) findViewById(R.id.list); 
    lv.setAdapter(ma); 
    search= (EditText) findViewById(R.id.search); //editext 
    search.addTextChangedListener(new TextWatcher() { //supply edittext value to filter 

     public void onTextChanged(CharSequence s, int start, int before, int count) { 
         ma.getFilter().filter(s); 
         ma.notifyDataSetChanged(); 

     } 

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


      } 

      public void afterTextChanged(Editable s) { 
      } 
      }); 


} 



class Myadapter extends ArrayAdapter 
{ 
LayoutInflater mInflater; 


public void setData(ArrayList<NewData> mPpst) { //function to set data based on search result 
     mPostingData = mPpst;//contains class items data. 
    } 

@Override 
public Filter getFilter() { //implement getFilter 
    return new Filter() { 
     @Override 
     protected void publishResults(CharSequence constraint, FilterResults results) { 
      if (results != null && results.count >= 0) { 
       setData((ArrayList<NewData>) results.values);//if results of search is null set the searched results data 
      } else { 
       setData(mOri);// set original values 
      } 

      notifyDataSetInvalidated();//refresh listview 
     } 


     //this performs filtering data.//check if data matches whats typed in editext 
     //add it to list if found. return list (founditems) 
     @Override 
     protected FilterResults performFiltering(CharSequence constraint) { 
      FilterResults result = new FilterResults(); 
      if (!TextUtils.isEmpty(constraint)) { 
       constraint = constraint.toString().toLowerCase(); 
       ArrayList<NewData> foundItems = new ArrayList<NewData>(); 
       if(mTemp!=null) 
       { 
       for(int i=0;i<mTemp.size();i++) 
       { 

        if (mTemp.get(i).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString().contains(constraint)) { 
         System.out.println("My datas"+mTemp.get(i).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString()); 
         foundItems.add(mTemp.get(i)); 

        } 
        else 
        { 

        } 
       } 
       } 
       result.count = foundItems.size();//search results found return count 
       result.values = foundItems;// return values 
      } 
      else 
      { 
       result.count=-1;// no search results found 
      } 


      return result; 
     } 
    }; 
} 
public Myadapter(Context context) { 
    super(context, 0); 
    mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    // TODO Auto-generated constructor stub 
} 

@Override 
public int getCount() { 
    // TODO Auto-generated method stub 
    return mPostingData.size(); 
} 

@Override 
public Object getItem(int position) { 
    // TODO Auto-generated method stub 
    return position; 
} 

@Override 
public long getItemId(int position) { 
    // TODO Auto-generated method stub 
    return 0; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    // TODO Auto-generated method stub 
    ViewHolder holder; 


     if(mOri == null){ 

      return null; 
     } 
       // When convertView is not null, we can reuse it directly, there is no need 
       // to reinflate it. We only inflate a new View when the convertView supplied 
       // by ListView is null. 
       if (convertView == null) { 
        convertView = mInflater.inflate(R.layout.list, null); 
        convertView.setLayoutParams(new AbsListView.LayoutParams(LayoutParams.FILL_PARENT, 
          LayoutParams.WRAP_CONTENT)); 
        // Creates a ViewHolder and store references to the two children views 
        // we want to bind data to. 
        holder = new ViewHolder(); 
        holder.t1=(TextView) convertView.findViewById(R.id.textView1); 
        holder.t2 = (TextView) convertView.findViewById(R.id.textView2); 
        holder.t3 = (TextView) convertView.findViewById(R.id.textView3); 

        convertView.setTag(holder); 
       } else { 
        // Get the ViewHolder back to get fast access to the TextView 
        // and the ImageView. 
        holder = (ViewHolder) convertView.getTag(); 
       } 
       holder.t1.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString()); 
       holder.t2.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_NAME).toString()); 
       holder.t3.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_MOBILE).toString()); 
       return convertView; 
    } 
} 
class ViewHolder 
{ 
TextView t1,t2,t3; 
} 
}

list.xml

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

<TextView 
    android:id="@+id/textView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:paddingLeft="20dp" 
    android:text="TextView" /> 

<TextView 
    android:id="@+id/textView2" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:paddingLeft="20dp" 
android:text="TextView" /> 

<TextView 
android:id="@+id/textView3" 
android:layout_width="wrap_content" 
android:layout_height="wrap_content" 
android:paddingLeft="20dp" 
android:text="TextView" /> 

</LinearLayout>

NewData讲座保存所有数据的HashMap

public class NewData { 
public static final String TAG_CUSTOMER_CODE = "customer_code"; 
public static final String TAG_CUSTOMER_NAME = "customer_name"; 
public static final String TAG_CUSTOMER_MOBILE = "customer_mobile"; 
public static final String TAG_CUSTOMER_ADDRESS = "customer_address"; 

Hashtable newDatacus=new Hashtable(); 

public NewData() 
{ 

    newDatacus.put(NewData.TAG_CUSTOMER_CODE,new String()); 
    newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS,new String()); 
    newDatacus.put(NewData.TAG_CUSTOMER_NAME,new String()); 
    newDatacus.put(NewData.TAG_CUSTOMER_MOBILE,new String()); 
    newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS,new String()); 

} 
}

来源

2013-04-02 09:16:30 Raghunandan

+0

使用HashTable是条件？ – emrerme

+0

不，我只是用这个想法。这不是一个条件。你也可以用这种方式实现。 Arraylist索引0将包含与客户1相关的细节，即客户名称，电话号码。 – Raghunandan

+0

在for循环中，我添加数据。在你的代码中，你可以使用来自服务器的数据来扩展你的列表，比如解析json数据。 – Raghunandan

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