我有一个问题，我在网格视图中显示从Url解析的图像，我设计了一个精炼搜索对话框来优化网格视图中的搜索，但问题是解析工作正常但网格视图下次没有刷新我处理精炼搜索的时间。表示网格视图项目未刷新它显示以前的结果。请帮我解决这个问题。
代码：
package org.shopzilla.android.search;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.shopzilla.android.common.R;
import org.shopzilla.android.parsing.SearchResult_Json;
import org.shopzilla.android.parsing.Search_Refine_Json;
import org.shopzilla.android.parsing.Search_refine_grid;
import org.shopzilla.android.product.ProductComparisonActivity;
import com.flurry.android.FlurryAgent;
import android.app.Activity;
import android.app.Dialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.GridView;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.Toast;
public class SearchGridActivity extends Activity{
URL url1;
public static Bitmap[] bmp;
Bundle bundle;
GridView grid;
String prod_id;
public static String str,str1;
public static Boolean flag_grid=false;
public static int count =0;
ImageButton _gridImageButton, brand_options_btn,color_options_btn,mat_options_btn;
Button categories_btn;
public static String keyword;
ArrayList<HashMap<String,Object>> list ;
ListView listView,brandlist, colorlist;
static final int DIALOG_PRODUCE_ID = 0,DIALOG_REFINE_ID=1;
Dialog dialog_category,dialog_refine;
public static ArrayList<String> brand_list_load = new ArrayList<String>();
public static ArrayList<String> store_list_load = new ArrayList<String>();
public static ArrayList<String> brand_count = new ArrayList<String>();
public static ArrayList<String> brand_id = new ArrayList<String>();
public static ArrayList<String> brand_array_list = new ArrayList<String>();
public static ArrayList<String> store_array_list = new ArrayList<String>();
public static ArrayList<String> store_count = new ArrayList<String>();
public static ArrayList<String> store_id = new ArrayList<String>();
public static ArrayList<String> brand_selected = new ArrayList<String>();
public static ArrayList<HashMap<String,Object>> arr_list = new ArrayList<HashMap<String,Object>>();
String final_keyword;
public static Boolean falg=false;
String store_name;
String brand_name;
public String temp;
public static Boolean checkflag=true;
EditText et_search;
ArrayList<String> store_selected = new ArrayList<String>();
ArrayAdapter<String> slected_brand;
ArrayAdapter<String> slected_store;
ListView brand_list,store_list;
ArrayAdapter<String> arrayAdapter,storeAdapter, store_new_adapter, brand_new_adapter;
SimpleAdapter adapter;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.searchgrid);
bundle = getIntent().getExtras();
if(count==0)
{
keyword = bundle.getString("keyword");
final_keyword = keyword;
}
//str1 = bundle.getString("temp");
grid = (GridView)findViewById(R.id.Search_Result_Grid);
grid.invalidateViews();
this.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
final ProgressDialog dialog = ProgressDialog.show(this, "BIZRATE", "Loading.......", true);
final Handler handler = new Handler() {
public void handleMessage(Message msg) {
callHereForEff();
dialog.dismiss();
}
};
Thread checkUpdate = new Thread() {
public void run() {
if(count==1)
{
SearchResult_Json.json_parsing(final_keyword);
}
//SearchResultActivity.set_image();
Search_refine_grid.Json_parsing();
handler.sendEmptyMessage(0);
}
};
checkUpdate.start();
EditText et_search_grid = (EditText)findViewById(R.id.txt_search_grid);
et_search_grid.setText(keyword);
et_search_grid.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(SearchGridActivity.this,SearchTabActivity.class);
startActivity(intent);
}
});
Button btn_list = (Button)findViewById(R.id.btn_searchresult_list);
Button btn_refine = (Button)findViewById(R.id.btn_RefineSearch);
btn_refine.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
arrayAdapter =
new ArrayAdapter<String>(SearchGridActivity.this,R.layout.ref_row, R.id.label, brand_list_load);
storeAdapter =
new ArrayAdapter<String>(SearchGridActivity.this,R.layout.ref_row, R.id.label, store_list_load);
showDialog(0);
}
});
btn_list.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(SearchGridActivity.this,SearchResultActivity.class);
intent.putExtra("keyword", keyword);
startActivity(intent);
finish();
}
});
/*for(int j=0;j<SearchResultActivity.image_me.size();j++)
{
ImageView iv = new ImageView(this);
//iv.setImageBitmap(SearchResultActivity.me_bmp[j]);
HashMap<String,Object> temp = new HashMap<String,Object>();
temp.put("image",iv.VISIBLE);
temp.put("price", SearchResultActivity.min_price.get(j));
arr_list.add(temp);
}
adapter = new SimpleAdapter(SearchGridActivity.this,arr_list,R.layout.search_result_griditem,new String[] {"image","price"},new int[] {R.id.img_SearchResultGrid_Product,R.id.txt_SearchResultGrid_Price});
grid.setAdapter(adapter);*/
grid.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
Toast.makeText(SearchGridActivity.this, "" + position, Toast.LENGTH_SHORT).show();
if(SearchResultActivity.type.get(position).equals("OFFER"))
{
prod_id = SearchResultActivity.id.get(position);
System.out.println("Offer Id==================="+prod_id);
//type_po=true;
Intent intent = new Intent(SearchGridActivity.this,ProductComparisonActivity.class);
intent.putExtra("prod_type", "true");
intent.putExtra("prod_id", SearchResultActivity.id.get(position));
startActivity(intent);
}
else
{
prod_id = SearchResultActivity.id.get(position);
System.out.println("Product Id==================="+prod_id);
//type_po=false;
Intent intent = new Intent(SearchGridActivity.this,ProductComparisonActivity.class);
//intent.putExtra("productType", "SZPID");
intent.putExtra("prod_type", "false");
intent.putExtra("prod_id", SearchResultActivity.id.get(position));
startActivity(intent);
}
}
});
}
//Clear Arraylists
public static void arralist_clear()
{
SearchResultActivity.min_price.clear();
SearchResultActivity.image_me.clear();
}
protected void callHereForEff() {
if(count==1)
{
//ImageAdapter obj1 = new ImageAdapter(this);
//obj1.notifyDataSetChanged();
grid.setAdapter(new ImageAdapter(this));
final ImageAdapter im = new ImageAdapter(this);
im.notifyDataSetChanged();
}
else
{
//ImageAdapter obj = new ImageAdapter(this);
//obj.notifyDataSetChanged();
grid.setAdapter(new ImageAdapter(this));//Load the GridView
final ImageAdapter im = new ImageAdapter(this);
im.notifyDataSetChanged();
}
//grid.setAdapter(adapter);
}
//Showing Images with TextViews in Grid View
public class ImageAdapter extends BaseAdapter{
Context mContext;
public static final int ACTIVITY_CREATE = 10;
public ImageAdapter(Context c){
mContext = c;
}
public int getCount() {
// TODO Auto-generated method stub
return SearchResultActivity.image_me.size();
}
public View getView(int position, View convertView, ViewGroup parent) {
View v;
if(convertView==null){
LayoutInflater li = getLayoutInflater();
v = li.inflate(R.layout.search_result_griditem, null);
TextView tv = (TextView)v.findViewById(R.id.txt_SearchResultGrid_Price);
tv.setText(SearchResultActivity.min_price.get(position));
ImageView iv = (ImageView)v.findViewById(R.id.img_SearchResultGrid_Product);
iv.setImageBitmap(SearchResultActivity.me_bmp[position]);
}
else
{
v = convertView;
}
return v;
}
public Object getItem(int arg0) {
// TODO Auto-generated method stub
return null;
}
public long getItemId(int arg0) {
// TODO Auto-generated method stub
return 0;
}
}
//Dialog Creation for Refine Search.
@Override
protected Dialog onCreateDialog(int id) {
brand_list_load.add(brand_array_list.get(0));
store_list_load.add(store_array_list.get(0));
store_new_adapter = new ArrayAdapter<String>(this,R.layout.ref_row, R.id.label, store_array_list);
brand_new_adapter = new ArrayAdapter<String>(this,R.layout.ref_row, R.id.label, brand_array_list);
switch(id) {
case 0:
dialog_refine = new Dialog(this);
dialog_refine.setContentView(R.layout.refine_dialog);
brand_list= (ListView)dialog_refine.findViewById(R.id.exp);
store_list= (ListView)dialog_refine.findViewById(R.id.exp_mat);
brand_list.invalidate();
store_list.invalidate();
brand_options_btn = (ImageButton)dialog_refine.findViewById(R.id.options_btn1);
et_search = (EditText)dialog_refine.findViewById(R.id.txt_RefineSearch);
et_search.setText(keyword);
mat_options_btn = (ImageButton)dialog_refine.findViewById(R.id.options_btn3);
//Loads Brands List
brand_list.setAdapter(arrayAdapter);
//Loads Color List
//Loads Material List
store_list.setAdapter(storeAdapter);
//Reset Button
//Click on any Brand
brand_list.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> arg0, View arg1,int arg2, long arg3)
{
String brand = (String) (brand_list.getAdapter()).getItem(arg2);
brand_name = "+"+brand;
temp = (String) (brand_list.getAdapter()).getItem(0);
brand_selected.clear();
brand_selected.add(brand);
//brand_list_load.clear();
arrayAdapter.clear();
brand_list.invalidate();
reload_list();
//arrayAdapter.add(brand);
//slected_brand = new ArrayAdapter<String>(this,R.layout.ref_row, R.id.label, brand_selected);
System.out.println("POSITION IS-->"+ brand);
}
});
//Click on any Store
store_list.setOnItemClickListener(new OnItemClickListener()
{
public void onItemClick(AdapterView<?> arg0, View arg1,int arg2, long arg3)
{
String store = (String) (store_list.getAdapter()).getItem(arg2);
store_name = "+"+store;
store_selected.clear();
store_selected.add(store);
//storeAdapter.add(store);
storeAdapter.clear();
store_list.invalidate();
reload_storelist();
System.out.println("POSITION IS-->"+ store);
}
});
//Brand options
brand_options_btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
arrayAdapter.clear();
brand_list.invalidate();
brand_list.setAdapter(brand_new_adapter);
}
});
// Material Options
mat_options_btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
storeAdapter.clear();
store_list.invalidate();
store_list.setAdapter(store_new_adapter);
}
});
Button btn_reset = (Button)dialog_refine.findViewById(R.id.btn_Refine_reset);
btn_reset.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// TODO Auto-generated method stub
dialog_refine.dismiss();
}
});
//Done Button
Button done_btn=(Button)dialog_refine.findViewById(R.id.btn_Refine_Done);
done_btn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// TODO Auto-generated method stub
//checkflag=false;
count=1;
SearchResultActivity.arraylists_clear();
final_keyword=et_search.getText().toString()+brand_name+store_name;
Intent intent = new Intent(SearchGridActivity.this, SearchGridActivity.class);
intent.putExtra("keyword", keyword);
startActivity(intent);
}
});
break;
default:
dialog_refine = null;
}
return dialog_refine;
}
protected void reload_storelist() {
// TODO Auto-generated method stub
slected_store= new ArrayAdapter<String>(this,R.layout.ref_row, R.id.label, store_selected);
store_list.setAdapter(slected_store);
}
protected void reload_list() {
//brand_list.invalidate();
//arrayAdapter.clear();
slected_brand = new ArrayAdapter<String>(this,R.layout.ref_row, R.id.label, brand_selected);
brand_list.setAdapter(slected_brand);
//brand_selected.clear();
}
//Flurry Implementation
public void onStart()
{
super.onStart();
FlurryAgent.onStartSession(this, "AJT5DWUVF6IAE78NQV69");
// your code
}
public void onStop()
{
super.onStop();
FlurryAgent.onEndSession(this);
// your code
}
}
答案 0 :(得分：7)
我没有检查你的所有代码，但我可以看到一些问题：
1
grid.setAdapter(new ImageAdapter(this));//Load the GridView
final ImageAdapter im = new ImageAdapter(this);
im.notifyDataSetChanged();
不确定这应该做什么，你创建一个新的ImageAdapter，然后是第二个并在其上调用notifyDataSetChanged，这似乎没用，因为它没有绑定到任何视图。
2.您的ImageAdapter类已损坏，尤其是getView方法。 getView背后的主要思想是你收到一个convertView来回收。如果为null，则创建一个视图并在其中设置信息。如果它不为null，则重用convertView并在其中设置信息。在您的代码中，只有在视图为空时才设置信息，因此一旦滚动或更改数据，它将尝试回收视图，并且您不会更改其内容。
该方法应该类似于
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (v == null){
// No view passed, create one !
LayoutInflater li = getLayoutInflater();
v = li.inflate(R.layout.search_result_griditem, parent, false);
}
// Set the view's content
TextView tv = (TextView)v.findViewById(R.id.txt_SearchResultGrid_Price);
tv.setText(SearchResultActivity.min_price.get(position));
ImageView iv = (ImageView)v.findViewById(R.id.img_SearchResultGrid_Product);
iv.setImageBitmap(SearchResultActivity.me_bmp[position]);
return v;
}
您还可以保留对适配器的引用，并在希望GridView 刷新其内容时调用 notifyDataSetChanged 。
最后，您可能不希望ImageAdapter中的getItemId方法始终返回0，因为GridView使用该id来管理回收的视图和所有。更容易实现
public long getItemId(int position){
return position;
}
也可能值得填充getItem方法。