我有一个问题，我在从 Url 解析的 GridView 中显示图像，我设计了一个优化搜索对话框来优化 GridView 中的搜索，但问题是解析工作正常但 GridView 接下来没有刷新我处理 Refine Search 的时间。表示 GridView 项目不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
}
}
最佳答案
我没有检查你所有的代码，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，您创建了一个新的 ImageAdapter，然后在其上调用了 notifyDataSetChanged，这看起来毫无用处，因为它没有绑定(bind)到任何 View 。
2. 你的 ImageAdapter 类坏了，尤其是 getView 方法。 getView 背后的主要思想是你收到一个 convertView 来回收。如果为空，则创建一个 View 并在其中设置信息。如果它不为空，请重新使用 convertView 并在其中设置信息。在您的代码中，您仅在 View 为 null 时设置信息，因此一旦您滚动或更改数据，它将尝试回收 View ，并且您不会更改它们的内容。
方法应该是这样的
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，并在您希望 GridView 刷新其内容时调用 notifyDataSetChanged。
最后，您可能不希望 ImageAdapter 中的 getItemId 方法一直返回 0，因为 GridView 使用该 id 来管理回收 View 和所有 View 。一个更简单的实现是
public long getItemId(int position){
return position;
}
可能还值得填充 getItem 方法。
关于android - 在 Android 中动态刷新 Gridview，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/6469449/
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