在我的应用程序中，我有 tabhost，我在其中显示列表视图。我无法滚动列表视图，当我尝试滚动列表视图的颜色更改但不滚动时。这里有图片
当我尝试滚动它的颜色变化时
我的 SearchDictionaryActivity.java 是
public class SearchDictionaryActivity extends Activity{
Intent intent;
// Progress Dia//Log
private ProgressDialog pDialog;
DataHolder obj;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
private boolean enablePopup = true;
// Listview Adapter
ArrayAdapter<String> adapter;
//ArrayList<String> categories=new ArrayList<String>();
// catgories JSON url
private static String url_all_products;
// JSON Node names It should be same on srver(encodeing) and client(decoding)
private static final String TAG_SUCCESS = "success";
private static final String TAG_products = "Products";
private static final String TAG_Image = "Image";
private static final String TAG_NAME = "name";
// category JSONArray
JSONArray category = null;
// flag for Internet connection status
Boolean isInternetPresent = false;
EditText edittext;
ListView listview;
ArrayList<String> text_sort = new ArrayList<String>();
ArrayList<Bitmap> image_sort = new ArrayList<Bitmap>();
String ITEMTITLE ="HasMapValue";
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.search_dictionary);
url_all_products=getString(R.string.url_ip);
url_all_products=url_all_products+"get_list_of_name_of_products.php";
new LoadCategories().execute();
edittext = (EditText) findViewById(R.id.EditText01);
listview = (ListView) findViewById(R.id.ListView01);
}
/**
* Background Async Task to Load all catgories by making HTTP Request
* */
class LoadCategories extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
Bitmap decodedByte;
//ArrayList<HashMap<String, Object>> productsList=new ArrayList<HashMap<String,Object>>();
String[] text = new String[0];
Bitmap[] image = new Bitmap[0];
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(SearchDictionaryActivity.this);
pDialog.setMessage("Loading ...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting catgories JSON
* */
protected String doInBackground(String... args) {
// Building Parameters
List<NameValuePair> params = new ArrayList<NameValuePair>();
// getting JSON string from URL
JSONObject json = jParser.makeHttpRequest(url_all_products, "GET", params);
// Check your log cat for JSON reponse
//Log.d("All Products: ", json.toString());
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Categorys
category = json.getJSONArray(TAG_products);
//Log.i("category ", category.toString());
//Log.i("Lengt Category"," " +category.length());
// looping through All Categories
for (int i = 0; i < category.length(); i++) {
JSONObject c = category.getJSONObject(i);
//Log.i("JSONObject ", c.toString());
// Storing each json item in variable
String name = c.getString(TAG_NAME);
String ProductImage = c.getString(TAG_Image);
//Log.i("StrineName ", name);
byte[] decodedString = Base64.decode(ProductImage, Base64.DEFAULT);
decodedByte = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);
//HashMap<String, Object> map = new HashMap<String, Object>();
text=reallocation(text);
image=reallocation_BitMap(image);
text[i]=name.toString().toLowerCase();
image[i]=decodedByte;
}
} else {
// no products found
// Launch Add New product Activity
/*Intent i = new Intent(getApplicationContext(),
NewProductActivity.class);
// Closing all previous activities
i.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(i);*/
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
//
if (pDialog.isShowing()) {
pDialog.dismiss();
// progressDialog.setCancelable(true);
}
edittext.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before,
int count) {
int textlength = edittext.getText().length();
text_sort.clear();
image_sort.clear();
if (s.length() >= 1 && enablePopup) {
//Log.i("Length of SorttEX111"," "+ text_sort.size());
for( int i=0;i<text.length;i++)
{
if((s.toString().toLowerCase()).equalsIgnoreCase(((String) text[i].subSequence(0, textlength))))
{
text_sort.add(text[i]);
image_sort.add(image[i]);
}
}
}
listview.setAdapter(new MyCustomAdapter(text_sort, image_sort));
enablePopup = true;
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void afterTextChanged(Editable s) {
}
});
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = this.getMenuInflater();
menuInflater.inflate(R.menu.item_menu, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (((String) item.getTitle()).compareTo("About") == 0) {
return true;
}
return super.onOptionsItemSelected(item);
}
public class DataHolder
{
String ProductName;
Bitmap Productimage;
public void setData(String ProductName,Bitmap image)
{
this.ProductName=ProductName;
this.Productimage=image;
}
public String GetProductName()
{return ProductName;}
public Bitmap Getimage()
{return Productimage;}
}
public class DataHolder1
{
String ProductName;
Bitmap Productimage;
public void setData1(String ProductName,Bitmap image)
{
this.ProductName=ProductName;
this.Productimage=image;
}
public String GetProductName1()
{return ProductName;}
public Bitmap Getimage1()
{return Productimage;}
}
class MyCustomAdapter extends BaseAdapter
{
String[] data_text;
Bitmap[] data_image;
MyCustomAdapter()
{
data_text=null;
data_image=null;
}
MyCustomAdapter(String[] text, Bitmap[] image)
{
data_text = text;
data_image = image;
}
MyCustomAdapter(ArrayList<String> text, ArrayList<Bitmap> image)
{
data_text = new String[text.size()];
data_image = new Bitmap[image.size()];
for(int i=0;i<text.size();i++)
{
data_text[i] = text.get(i);
data_image[i] = image.get(i);
}
}
public int getCount()
{
return data_text.length;
}
public String getItem(int position)
{
return null;
}
public long getItemId(int position)
{
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.search_dictionary_item, null);
}
TextView textview = (TextView) convertView.findViewById(R.id.TextView01);
ImageView imageview = (ImageView) convertView.findViewById(R.id.ImageView01);
textview.setText(data_text[position]);
imageview.setImageBitmap(data_image[position]);
return convertView;
}
}
public static String[] reallocation(String s[])
{
String t[]=new String[s.length+1];
for(int i=0; i<s.length;i++)
{
t[i]=s[i];
}
return t;
}
public static Bitmap[] reallocation_BitMap(Bitmap s[])
{
Bitmap t[]=new Bitmap[s.length+1];
for(int i=0; i<s.length;i++)
{
t[i]=s[i];
}
return t;
}
}
和 search_dictionary.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"
android:background="@color/green">
<EditText
android:id="@+id/EditText01"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:hint="Search" >
</EditText>
<ListView
android:id="@+id/ListView01"
android:layout_width="fill_parent"
android:layout_height="0dip"
android:layout_weight="50">
</ListView>