向大家致以问候。我正在开发一个应用程序，我希望在其中实现动态ExpandableListView。
ClientFunction.java
public class ClientFunction extends AppCompatActivity {
String id, name, mo, city, pin, date, profmail;
SessionManager session;
ArrayList<HashMap<String, String>> arraylist;
ListView orderlist;
OrderListAdapter adapter;
String amount, status;
TextView amt;
LinearLayout orderempty;
Dialog dialog;
List<String> listDataHeader;
HashMap<String, List<String>> listDataChild;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_client_function);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
final ActionBar ab = getSupportActionBar();
assert ab != null;
ab.setDisplayHomeAsUpEnabled(true);
ab.setTitle("Orders");
Intent i = getIntent();
session = new SessionManager(this);
HashMap<String, String> user = session.getUserDetails();
profmail = user.get(SessionManager.KEY_EMAIL);
orderempty = (LinearLayout) findViewById(R.id.layout_event_empty);
orderempty.setVisibility(View.GONE);
id = i.getStringExtra("clientid");
name = i.getStringExtra("clientname");
city = i.getStringExtra("address");
mo = i.getStringExtra("mobileno");
pin = i.getStringExtra("pincode");
date = i.getStringExtra("date");
listDataHeader = new ArrayList<String>();
listDataChild = new HashMap<String, List<String>>();
new HttpAsyncTask().execute(SessionManager.getAmateurPath() + "ViewOrder");
}
private class HttpAsyncTask extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
return POST(urls[0]);
}
@Override
protected void onPostExecute(String result) {
orderlist = (ListView) findViewById(R.id.order_list);
// Pass the results into ListViewAdapter.java
adapter = new OrderListAdapter(ClientFunction.this, arraylist);
// Set the adapter to the ListView
orderlist.setAdapter(adapter);
}
}
public String POST(String url) {
InputStream inputStream;
String result = "";
try {
arraylist = new ArrayList<HashMap<String, String>>();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
String json = "";
JSONObject jsonObject = new JSONObject();
jsonObject.accumulate("username", profmail);
jsonObject.accumulate("cid", id);
json = jsonObject.toString();
Log.d("JSONStringSend", json);
StringEntity se = new StringEntity(json);
httpPost.setEntity(se);
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
HttpResponse httpResponse = httpclient.execute(httpPost);
inputStream = httpResponse.getEntity().getContent();
if (inputStream != null) {
result = convertInputStreamToString(inputStream);
Log.d("JSONResponce", result);
String add = "";
JSONArray jsonArray = new JSONArray(result);
for (int i = 0; i < jsonArray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject mainjj = new JSONObject((String) jsonArray.get(i));
map.put("item", mainjj.getString("item"));
map.put("total", mainjj.getString("total"));
map.put("orderno", mainjj.getString("orderno"));
map.put("quantity", mainjj.getString("quantity"));
map.put("extrarate", mainjj.getString("extrarate"));
map.put("rate", mainjj.getString("rate"));
map.put("detail", mainjj.getString("detail"));
arraylist.add(map);
listDataHeader.add(mainjj.getString("item"));
List<String> mainjj.getString("item") = new ArrayList<String>();
mainjj.getString("item").add("Audi");
mainjj.getString("item").add("BMW");
mainjj.getString("item").add("Honda ");
mainjj.getString("item").add("POLO");
}
Log.d("ArrayList", arraylist.toString());
Log.d("ArrayList123456789", "" + listDataHeader.toString());
}
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
return result;
}
private String convertInputStreamToString(InputStream inputStream) throws IOException {
BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(inputStream));
String line = "";
String result = "";
while ((line = bufferedReader.readLine()) != null)
result += line;
inputStream.close();
return result;
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_client_function, menu);
// MenuItem item = menu.findItem(R.id.add_order);
// SpannableStringBuilder builder = new SpannableStringBuilder("* Login");
// // replace "*" with icon
// builder.setSpan(new ImageSpan(this, R.drawable.edit), 0, 1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
// item.setTitle(builder);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
switch (item.getItemId()) {
case android.R.id.home: {
finish();
return true;
}
case R.id.profile: {
Intent ii = new Intent(ClientFunction.this, ViewProfile.class);
ii.putExtra("clientid", id);
startActivity(ii);
break;
}
case R.id.add_order: {
Intent ii = new Intent(ClientFunction.this, AddOrder.class);
ii.putExtra("clientid", id);
ii.putExtra("clientname", name);
ii.putExtra("date", date);
ii.putExtra("pincode", pin);
ii.putExtra("address", city);
ii.putExtra("mobileno", mo);
startActivity(ii);
break;
}
adapter = new OrderListAdapter(ClientFunction.this, arraylist);
case R.id.add_payment: {
dialog = new Dialog(this);
// dialog.requestWindowFeature(Window.FEATURE_NO_TITLE);
dialog.setContentView(R.layout.addpayment);
dialog.setTitle(Html.fromHtml("<font color='#FF7F27'>Add Payment</font>"));
// dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
dialog.show();
amt = (TextView) dialog.findViewById(R.id.amount);
Button close = (Button) dialog.findViewById(R.id.save);
close.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
amount = amt.getText().toString();
if (amount.length() != 0) {
new HttpAsyncTask1().execute(SessionManager.getAmateurPath() + "AddProfessionalPayment");
} else {
amt.setError("Enter Amount");
}
}
});
break;
}
}
return super.onOptionsItemSelected(item);
}
private class HttpAsyncTask1 extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... urls) {
return POST1(urls[0]);
}
@Override
protected void onPostExecute(String result) {
if (status.equalsIgnoreCase("success")) {
amt.setHint("Enter Amount");
dialog.dismiss();
Toast.makeText(ClientFunction.this, "Amount Added Successfully", Toast.LENGTH_SHORT).show();
} else
Toast.makeText(ClientFunction.this, "Amount Added Failed", Toast.LENGTH_SHORT).show();
}
}
public String POST1(String url) {
InputStream inputStream;
String result = "";
try {
arraylist = new ArrayList<HashMap<String, String>>();
HttpClient httpclient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(url);
String json = "";
JSONObject jsonObject = new JSONObject();
jsonObject.accumulate("username", profmail);
jsonObject.accumulate("clientid", id);
jsonObject.accumulate("paymentrs", amount);
json = jsonObject.toString();
Log.d("JSONStringSend", json);
StringEntity se = new StringEntity(json);
httpPost.setEntity(se);
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");
HttpResponse httpResponse = httpclient.execute(httpPost);
inputStream = httpResponse.getEntity().getContent();
if (inputStream != null) {
result = convertInputStreamToString(inputStream);
Log.d("JSONResponce", result);
String add = "";
JSONObject mainjj = new JSONObject(result);
status = mainjj.getString("status");
}
} catch (Exception e) {
Log.d("InputStream", e.getLocalizedMessage());
}
return result;
}
public class OrderListAdapter extends BaseAdapter {
Context context;
LayoutInflater inflater;
Button send1;
ArrayList<HashMap<String, String>> data;
int lastPosition = 0;
private ColorGenerator mColorGenerator = ColorGenerator.MATERIAL;
HashMap<String, String> resultp = new HashMap<String, String>();
private DisplayImageOptions options;
public OrderListAdapter(Context context, ArrayList<HashMap<String, String>> arraylist) {
this.context = context;
data = arraylist;
}
@Override
public int getCount() {
if (data.size() == 0) {
orderempty.setVisibility(View.VISIBLE);
orderlist.setVisibility(View.GONE);
}
return data.size();
}
@Override
public Object getItem(int position) {
return null;
}
@Override
public long getItemId(int position) {
return 0;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View itemView = inflater.inflate(R.layout.inflate_listoforder, parent, false);
resultp = data.get(position);
TextView iname = (TextView) itemView.findViewById(R.id.iname);
TextView iid = (TextView) itemView.findViewById(R.id.iid);
TextView iqty = (TextView) itemView.findViewById(R.id.iqty);
TextView itotal = (TextView) itemView.findViewById(R.id.itotal);
iname.setText("Item Name: " + resultp.get("item"));
iid.setText("Item Id: " + resultp.get("orderno"));
iqty.setText("ItemQuantity: " + resultp.get("quantity"));
itotal.setText("ItemTotal: " + resultp.get("total"));
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
resultp = data.get(position);
Intent ii = new Intent(ClientFunction.this, ViewOrder.class);
ii.putExtra("item", resultp.get("item"));
ii.putExtra("clientid", id);
ii.putExtra("orderno", resultp.get("orderno"));
ii.putExtra("quantity", resultp.get("quantity"));
ii.putExtra("total", resultp.get("total"));
ii.putExtra("extrarate", resultp.get("extrarate"));
ii.putExtra("rate", resultp.get("rate"));
ii.putExtra("detail", resultp.get("detail"));
startActivity(ii);
}
});
Animation animation = AnimationUtils.loadAnimation(context, (position > lastPosition) ? R.anim.up_from_bottom : R.anim.down_from_top);
itemView.startAnimation(animation);
lastPosition = position;
return itemView;
}
}
}
我不知道如何在List<String> listDataHeader和HashMap<String, List<String>> listDataChild中添加数据。
我在listDataHeader成功添加了数据，但我不知道如何动态地将数据添加到listDataChild。
我在listDataChild添加数据如下
List<String> mainjj.getString("item") = new ArrayList<String>();
mainjj.getString("item").add("Audi");
mainjj.getString("item").add("BMW");
mainjj.getString("item").add("Honda ");
mainjj.getString("item").add("POLO");
但它不起作用。所以请帮我解决一下。这样我就可以继续编码了。提前谢谢。
答案 0 :(得分：0)
您的代码令人困惑，所以我在这里告诉您如何为ExpandableListView Header和Child添加数据（例如静态）。
//Function that return Map to add in adapter
public static Map<String, List<String>> getData()
{
Map<String, List<String>> expandableList = new TreeMap<>();
List<String> Child1 = new ArrayList<String>();
Child1.add("Child data......");
List<String> Child2 = new ArrayList<String>();
Child2.add("Child data......");
List<String> Child3 = new ArrayList<String>();
Child3.add("Child data........");
expandableList.put("Header-1", Child1);
expandableListDetail.put("Header-2",Child2);
expandableListDetail.put("Header-3",Child3);
expandableListDetail.put("Header-4",Child4);
return expandableListDetail;
}
这里我只是添加自己的数据，但是对于动态行为，你必须使用循环将数据添加到“expandablList”＆amp; “孩子”名单。