因为我是Android类型的新手，所以我希望你能帮我一把：
该应用程序使用由FragmentManager管理的不同片段。这个类由FragmentStatePagerAdapter扩展。
如果我使用这个特定的片段：
import android.app.ListActivity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.ListFragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.widget.SimpleAdapter;
import android.widget.TextView;
import com.loopj.android.http.AsyncHttpResponseHandler;
import org.apache.http.NameValuePair;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
/**
* Created by welser on 22.06.2015.
*/
public class RalisierungsFragment extends ListFragment {
// Store instance variables
private String title;
private int page;
public int value = 111;
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRODUCTS = "products";
private static final String TAG_PID = "pid";
private static final String TAG_DESCRIPTION = "description";
private static final String TAG_NAME = "name";
private static final String TAG_PRICE = "price";
private static final String TAG_DATUM = "created_at";
static int [] colors = new int[] {0xF0FFFF, 0xD3D3D3 };
// Hashmap for ListView
ArrayList<HashMap<String, String>>productsList = new ArrayList<HashMap<String, String>>();
// Progress Dialog
private ProgressDialog pDialog;
// Creating JSON Parser object
JSONParser jParser = new JSONParser();
// url to get all products list
//private static String url_all_products = "http://novaten.cloud.hs-furtwangen.de/phpandroid/get_all_products.php";
private static String url_all_products = "http://141.28.100.152/phpandroid/get_all_products.php";
// products JSONArray
JSONArray products = null;
public TextView text;
// newInstance constructor for creating fragment with arguments
public static RalisierungsFragment newInstance(int page, String title) {
RalisierungsFragment rs = new RalisierungsFragment();
Bundle args = new Bundle();
args.putInt("someInt", page);
args.putString("someTitle", title);
rs.setArguments(args);
return rs;
}
// Store instance variables based on arguments passed
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
page = getArguments().getInt("someInt", 0);
title = getArguments().getString("someTitle");
text = (TextView) getActivity().findViewById(R.id.name);
// Loading products in Background Thread
new LoadAllProducts().execute();
}
/**
* 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(getActivity()); // abgendert
pDialog.setMessage("Loading data. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
public 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: ",value + "");
try {
// Checking for SUCCESS TAG
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// products found
// Getting Array of Products
products = json.getJSONArray(TAG_PRODUCTS);
// 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);
String name = c.getString(TAG_NAME);
String price = c.getString(TAG_PRICE);
String date = c.getString(TAG_DATUM);
String description = c.getString(TAG_DESCRIPTION);
// 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_NAME, name);
map.put(TAG_DATUM, date);
map.put(TAG_PRICE, price);
map.put(TAG_DESCRIPTION, description);
set(products.length());
// adding HashList to ArrayList
productsList.add(map);
}
} else {
// no products found
// Launch Add New product Activity
}
} 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
getActivity().runOnUiThread(new Runnable() {
public void run() {
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
getActivity(), productsList,
R.layout.list_item, new String[]{TAG_PID,
TAG_NAME, TAG_PRICE, TAG_DATUM,TAG_DESCRIPTION},
new int[]{R.id.pid, R.id.name, R.id.price, R.id.datum, R.id.description});
//text.setBackgroundColor(Color.GREEN);
setListAdapter(adapter);
}
});
}
public void set(int i){
value = i;
}
}
}
背景颜色应取决于listview上的每个json String（R.id.name）。我希望我尽可能清楚地描述一切。如果还有其他一些问题，请不要犹豫，以纠正我。 非常感谢你:)）
答案 0 :(得分：0)
要更改每一行的颜色，您必须使用自己的adater。
首先使用所需的行布局创建xml文件。然后在此骨架后创建自定义适配器：
public class YourAdapter extends BaseAdapter {
private String[] mStrings;//the array to display
private LayoutInflater mInflater;
private YourAdapter(Context context, String[] datas) {
mInflater = LayoutInflater.from(context);
mStrings = datas;
}
@Override
public int getCount() {
return mStrings.length();
}
@Override
public long getItemIdAtPosition(int position) {
return position;
}
@Override
public Object getItemAtPosition(int position) {
return mStrings[position];
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
//the following line is bad in terme of oprimization, you should use a holder, but it is a bit too long to write here, see the link below for example
convertView = mInflater.inflate(R.layout.your_row);
//set the datas and the colors to the row
TextView textView = (TextView) convertView.findViewById(R.id.your_text_view_id);
textView.setText(mStrings[position]);
convertView.setBackgroundColor(R.color.your_color);//you can change the color following the position or the string that you put in
return convertView;
}
}
最后在您的活动中使用
YourAdapter adapter = new YourAdapter(this, productList);
listView.setAdapter(adapter);
有关更详细的实施，请参阅http://www.vogella.com/tutorials/AndroidListView/article.html#adapterown
答案 1 :(得分：0)
谢谢大家。我决定简单地覆盖getView（）Methode，所以我不需要额外的类。
ListAdapter adapter = new SimpleAdapter(
getActivity(), productsList,
R.layout.list_item, new String[]{TAG_PID,
TAG_NAME, TAG_PRICE, TAG_DATUM,TAG_DESCRIPTION},
new int[]{R.id.pid, R.id.name, R.id.price, R.id.datum, R.id.description}){
@Override
public View getView (int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
if ("major".equals(productsList.get(position).get(TAG_NAME))){
view.setBackgroundColor(Color.BLUE);
} else if ("cirtical".equals(productsList.get(position).get(TAG_NAME))){
view.setBackgroundColor(Color.RED);
} else if ("warning".equals(productsList.get(position).get(TAG_NAME))) {
view.setBackgroundColor(Color.RED);
} else if ("info".equals(productsList.get(position).get(TAG_NAME))) {
view.setBackgroundColor(Color.GREEN);
} else {
view.setBackgroundColor(Color.BLACK);
}
return view;
}
};
setListAdapter(adapter);