在CustomArrayAdapter过滤器在Android中 [英] Filter on CustomArrayAdapter in Android

问题描述

我在Android的新的，我也跟着关于ListView中加入搜索功能一些教程，但对我来说它不工作。谁能告诉我什么是错在我的code。

I'm new in Android, I followed some tutorials about adding search function on ListView, but in my case it's not working. Can anybody tell me what is wrong in my code.

下面是我的code：

Activity.java

public class SendMoney extends Activity {
    private ListView lvContacts;
    private EditText etSearch;
    private ContactListAdapter mAdapter;
    private String[] stockArr, stockArr1, stockArr2;
    private Intent i;

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

        initObjects();

        ArrayList<String> phoneContactList = new ArrayList<String>();
        ArrayList<String> ContactImage = new ArrayList<String>();
        ArrayList<String> PhoneNumber = new ArrayList<String>();

        ContentResolver cr = getContentResolver();
        Cursor cur = cr.query(ContactsContract.Contacts.CONTENT_URI, null, null, null, null);

        if (cur.getCount() > 0) {
          while (cur.moveToNext()) {
            String id = cur.getString(cur.getColumnIndex(ContactsContract.Contacts._ID));
            String name = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
            String img = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.PHOTO_THUMBNAIL_URI));

            if (Integer.parseInt(cur.getString(cur.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER))) > 0) {
              // This inner cursor is for contacts that have multiple numbers.
              Cursor pCur = cr.query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, ContactsContract.CommonDataKinds.Phone.CONTACT_ID + " = ?", new String[] { id }, null);
              while (pCur.moveToNext()) {
                String pnumber = pCur.getString(pCur.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));

                ContactImage.add(img);
                phoneContactList.add(name);
                PhoneNumber.add(pnumber);

                Log.i("Contact List", pnumber);
              }
              pCur.close();
            }
          }

          Collections.sort(phoneContactList);
          int cnt = phoneContactList.size(); // Count of contacts

          // Convert ArrayList<String> to String[] START

          // Contacts Name
          stockArr = new String[phoneContactList.size()];
          stockArr = phoneContactList.toArray(stockArr);

          // Contacts Photo
          stockArr1 = new String[ContactImage.size()];
          stockArr1 = ContactImage.toArray(stockArr1);

          // Contacts Number
          stockArr2 = new String[PhoneNumber.size()];
          stockArr2 = PhoneNumber.toArray(stockArr2);

          // Convert ArrayList<String> to String[] END

          mAdapter = new ContactListAdapter(getApplicationContext(), R.layout.banks_listview_layout, stockArr, stockArr1);
          lvContacts.setAdapter(mAdapter);

        }
        cur.close();

        lvContacts.setTextFilterEnabled(true);
        lvContacts.setOnItemClickListener(new AdapterView.OnItemClickListener() {

            @Override
            public void onItemClick(AdapterView<?> adapter, View view, int position, long id) {             
                i = new Intent(SendMoney.this, SendMoneyForm.class);
                i.putExtra("contact_name", stockArr[position]);
                i.putExtra("contact_image", stockArr1[position]);
                i.putExtra("contact_number", stockArr2[position]);
                startActivity(i);
            }
        });


        //***************** SEARCH START ***********************

        etSearch.addTextChangedListener(new TextWatcher() {

            @Override
            public void onTextChanged(CharSequence cs, int arg1, int arg2, int arg3) {
                // When user changed the Text
                mAdapter.getFilter().filter(cs.toString());
            }

            @Override
            public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
                    int arg3) {
                // TODO Auto-generated method stub

            }

            @Override
            public void afterTextChanged(Editable arg0) {
                // TODO Auto-generated method stub                          
            }
        });

        //***************** SEARCH END ***********************
    }

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

    private void initObjects(){
        lvContacts = (ListView)findViewById(R.id.lvContacts);
        etSearch   = (EditText)findViewById(R.id.etSearch);
    }

我的自定义数组适配器

public class ContactListAdapter extends ArrayAdapter<String> {
    private LayoutInflater mInflater;
    private String[] mStrings;
    private String[] mIcons;
    private int mViewResourceId;

    public ContactListAdapter(Context ctx, int resource,
            String[] option, String[] icons) {
        super(ctx, resource, option);

        mInflater = (LayoutInflater)ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        mStrings = option;
        mIcons   = icons;    
        mViewResourceId = resource;

    }

     @Override
        public int getCount() {
            return mStrings.length;
        }

        @Override
        public String getItem(int position) {
            return mStrings[position];
        }

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            convertView = mInflater.inflate(mViewResourceId, null);

            ImageView iv = (ImageView)convertView.findViewById(R.id.ivBankIcon);
            if(mIcons[position]==null) {
                iv.setImageResource(R.drawable.default_picture);
            } else {
                iv.setImageURI(Uri.parse(mIcons[position]));
                Log.d("LALA", mIcons[position]);
            }

            TextView tv = (TextView)convertView.findViewById(R.id.tvBankName);
            tv.setText(mStrings[position]);

            return convertView;
        }
}

在此先感谢！

推荐答案

您必须覆盖用getFilter method`并创建逻辑过滤数据。

You will have to override getFilter method` and create your logic for filtering the data.

公共过滤用getFilter（）

返回，可用于过滤模式限制数据的过滤器。

Returns a filter that can be used to constrain data with a filtering pattern.

此方法通常是由适配器类实现的。

This method is usually implemented by Adapter classes.

 EditText search= (EditText) findViewById(R.id.search);
 search.addTextChangedListener(new TextWatcher() {

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

     }

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

       }

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

在您的适配器

  @Override
  public Filter getFilter() {
  return new Filter() {
     @Override
     protected void publishResults(CharSequence constraint, FilterResults results) {
         if (results != null && results.count >= 0) {
             //if results of search is not null set the searched results data
         } else {
            // set original values
         }

         notifyDataSetInvalidated();
     }

然后

    @Override
     protected FilterResults performFiltering(CharSequence constraint) {
         FilterResults result = new FilterResults();
         if(condition)
            {

             ArrayList<MyDataType> foundItems = new ArrayList<MyDataType>();   
             // add items to foundItems if condition matches

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


         return result;
     }
 };

}

例如：

<一个href=\"http://stackoverflow.com/questions/10816243/search-in-listview-with-edittext/15367403#15367403\">Search在的EditText

Search in ListView with EditText

这篇关于在CustomArrayAdapter过滤器在Android中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！