我有两项活动。第一个活动是来自服务器的列表，第二个活动也是列表视图。如果我在第一个活动中执行onItemClick，则第二个活动将显示第一个活动中所选项目的列表。这是我的代码：
- 第一项活动 -
package com.statis.activity;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.json.JSONArray;
import org.json.JSONObject;
import com.example.main.DetailCategoryActivity;
import com.example.main.DetailRestoActivity;
import com.example.main.R;
import com.example.main.ResultRestoActivity;
import com.example.main.TabResultRestoActivity;
import com.example.parser.JSONParser;
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
public class List_ATM extends ListActivity {
//Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
JSONArray data = null;
ArrayList<HashMap<String,String>> dataList;
//url
private static String url_ = "http://www.tw-indo.com/droid_cari/atm.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_DATA = "Vw_Merchant_Detail";
private static final String TAG_Pk_Merchant_ID = "Pk_Merchant_ID";
private static final String TAG_DataLevel1_ID = "DataLevel1_ID";
private static final String TAG_DataLevel2_ID = "DataLevel2_ID";
private static final String TAG_DataLevel1 = "DataLevel1";
private static final String TAG_DataLevel2 = "DataLevel2";
private static final String TAG_DataLevel3 = "DataLevel3";
private static final String TAG_Address = "Address";
private static final String TAG_Longitude = "Longitude";
private static final String TAG_Latitude = "Latitude";
Context ctx;
String kota,subtitles;
String Pk_Merchant_ID,DataLevel1_ID,DataLevel2_ID,
DataLevel1, DataLevel2, DataLevel3, Address,
Longitude, Latitude ;
TextView selection, tvArea, tvRestoIndo, tvJenisMerchant;
@Override
public void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
kota = getIntent().getStringExtra("cities");
subtitles = getIntent().getStringExtra("subtitle");
ctx = this;
setContentView(R.layout.activity_detailcategory_list);
selection = (TextView)findViewById(R.id.tv_detailrestaurant);
tvJenisMerchant = (TextView)findViewById(R.id.tvRestoran);
tvJenisMerchant.setText(""+subtitles+"");
tvArea = (TextView)findViewById(R.id.area);
tvArea.setText(""+kota+"");
tvRestoIndo = (TextView)findViewById(R.id.tvRestoranIndo);
tvRestoIndo.setText(""+kota+"");
dataList = new ArrayList<HashMap<String, String>>();
new LoadData().execute();
ListView lv = getListView();
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> arg0, View v, int position,
long arg3) {
// TODO Auto-generated method stub
DataLevel2_ID = ((TextView) v.findViewById(R.id.id_merchant)).getText()
.toString();
Address = ((TextView) v.findViewById(R.id.tv_detailrestaurant)).getText()
.toString();
Intent i = new Intent(getApplicationContext(), ResultRestoActivity.class);
i.putExtra(TAG_DataLevel2_ID, DataLevel2_ID);
i.putExtra(TAG_Address, Address);
startActivity(i);
}
});
}
class LoadData extends AsyncTask<String, String, String> {
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(List_ATM.this);
pDialog.setMessage("Loading Merchant...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected String doInBackground(String... arg0) {
// TODO Auto-generated method stub
List<NameValuePair> params = new ArrayList<NameValuePair>();
JSONObject json = jParser.makeHttpRequest(url_, "GET", params);
Log.d("Get List :", json.toString());
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
data = json.getJSONArray(TAG_DATA);
for (int i=0; i<data.length(); i++) {
JSONObject c = data.getJSONObject(i);
String Pk_Merchant_ID = c.getString(TAG_Pk_Merchant_ID);
String DataLevel1_ID = c.getString(TAG_DataLevel1_ID);
String DataLevel2_ID = c.getString(TAG_DataLevel2_ID);
String DataLevel1 = c.getString(TAG_DataLevel1);
String DataLevel2 = c.getString(TAG_DataLevel2);
String DataLevel3 = c.getString(TAG_DataLevel3);
String Address = c.getString(TAG_Address);
String Longitude = c.getString(TAG_Longitude);
String Latitude = c.getString(TAG_Latitude);
HashMap<String, String> map = new HashMap<String, String>();
map.put(TAG_Pk_Merchant_ID, Pk_Merchant_ID);
map.put(TAG_DataLevel1_ID, DataLevel1_ID);
map.put(TAG_DataLevel2_ID, DataLevel2_ID);
map.put(TAG_DataLevel1, DataLevel1);
map.put(TAG_DataLevel2, DataLevel2);
map.put(TAG_DataLevel3, DataLevel3);
map.put(TAG_Address, Address);
map.put(TAG_Longitude, Longitude);
map.put(TAG_Latitude, Latitude);
dataList.add(map);
}
}
} catch (Exception e) {
// TODO: handle exception
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(String file_url) {
pDialog.dismiss();
runOnUiThread(new Runnable() {
public void run() {
// TODO Auto-generated method stub
ListAdapter adapter = new SimpleAdapter(
List_ATM.this, dataList,
R.layout.activity_detailcategory, new String[] {TAG_DataLevel2_ID, TAG_DataLevel2},
new int[] {R.id.id_merchant, R.id.tv_detailrestaurant});
setListAdapter(adapter);
}
});
}
}
}
- 第二次活动 -
package com.example.main;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import com.example.main.R.layout;
import com.statis.activity.List_ATM;
import android.app.Activity;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.TextView;
public class ResultRestoActivity extends Activity {
Context ctx;
String[] id, address;
TextView tes,tes2;
@Override
public void onCreate (Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
id = getIntent().getExtras().getStringArray("DataLevel2_ID");
address = getIntent().getExtras().getStringArray("Address");
ctx = this;
setContentView(R.layout.activity_restoresult);
ListView listresto = (ListView)findViewById(R.id.list);
ArrayList<HashMap<String, String>> mylist = new ArrayList<HashMap<String, String>>();
for (int i=0; i<mylist.size(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
map.put("id", (String) Array.get(id, i));
map.put("atm", "BCA");
map.put("alamat", (String) Array.get(address, i));
mylist.add(map);
}
SimpleAdapter sAdapter = new SimpleAdapter(ctx, mylist, R.layout.restoresult_row,
new String[] {"id","alamat"}, new int[] {R.id.merchant_name, R.id.merchant_address} );
listresto.setAdapter(sAdapter);
}
}
我仍然无法在第二个活动中显示列表。请更正我的代码，我需要你的建议。