好像合并复选框和列表视图不够困难。我遇到了这个愚蠢的问题：“我的列表项是假设从HTTP请求下载（完成）但我现在不知道应该在代码上放置复选框，以便每个列表项都有自己的复选框以及如何我可以记住每个项目被解雇“。以下是HTTP请求的已使用代码：
package com.example.androidhive;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import android.app.ListActivity;
import android.app.ProgressDialog;
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.AdapterView.OnItemClickListener;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
public class AllProductsActivity extends ListActivity {
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
ArrayList<HashMap<String, String>> productsList;
// url to get all products list
private static String url_all_products = "http://10.0.2.2:8080/android_connect/get_all_products.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_PID= "name";
private static final String TAG_CATEGORY = "category";
/*private static final String TAG_UNIT = "unit";
private static final String TAG_CALORY = "calory";
private static final String TAG_CARBOHYDRATE = "carbohydrate";
private static final String TAG_CATEGORY = "category";*/
// the array was defined in PHP file
private static final String TAG_PRODUCT = "product";
// products JSONArray
JSONArray products = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.all_products);
// Hashmap for ListView
productsList = new ArrayList<HashMap<String, String>>();
// Loading products in Background Thread
new LoadAllProducts().execute();
// Get listview
ListView lv = getListView();
// on seleting single product
// launching Edit Product Screen
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String pid = ((TextView) view.findViewById(R.id.pid)).getText()
.toString();
// Starting new intent
Intent in = new Intent(getApplicationContext(),
EditProductActivity.class);
// sending pid to next activity
in.putExtra(TAG_PID, pid);
// starting new activity and expecting some response back
startActivityForResult(in, 100);
}
});
}
// Response from Edit Product Activity
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
// if result code 100
if (resultCode == 100) {
// if result code 100 is received
// means user edited/deleted product
// reload this screen again
Intent intent = getIntent();
finish();
startActivity(intent);
Log.d("NUN complete","tyt");
}
}
/**
* Background Async Task to Load all product by making HTTP Request
* */
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(AllProductsActivity.this);
pDialog.setMessage("Loading items. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
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 Products
Log.d("All Products: ", json.toString());
products = json.getJSONArray(TAG_PRODUCT);
// looping through All Products
for (int i = 0; i < products.length(); i++) {
JSONObject c = products.getJSONObject(i);
// Storing each json item in variable
String id = c.getString(TAG_PID); // also name
String category = c.getString(TAG_CATEGORY );
// NO NEED FOR THEM !!
/*
String unit = c.getString(TAG_UNIT );
String category = c.getString(TAG_CATEGORY );
String calory = c.getString(TAG_CALORY );
String carbohydrate = c.getString(TAG_CARBOHYDRATE ); */
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_PID, id);
map.put(TAG_CATEGORY, category);
//map.put(TAG_NAME, name);
// adding HashList to ArrayList
productsList.add(map);
Log.d("All Products: ", json.toString());
}
} 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
pDialog.dismiss();
// updating UI from Background Thread
runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
AllProductsActivity.this, productsList,
R.layout.list_item, new String[] { TAG_PID,
TAG_CATEGORY},
new int[] { R.id.pid, R.id.category});
// updating listview
setListAdapter(adapter);
}
});
}
}
}
答案 0 :(得分：0)
您可以创建自定义适配器，放置从HTTP请求中获取的所有项目。每个项目都有一个复选框，您可以使用BaseAdapter代替SimpleAdapter。
答案 1 :(得分：0)
使用您用于显示产品的TextView创建一个xml，然后为CheckBox创建list，然后为ListView with the中的每个项目生成一个xml。请务必使用<ListView
android:id=@android:id/list
.../>
android：id`
runOnUiThread()或者你会收到错误。
另外，onPostExecute()中的UI不需要{{1}}，因为它已在{{1}}主题上运行