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我有一个 ListView ,其中显示了 50 个元素。我决定对 View 进行分页,以便在 View 的每个部分都有 10 个元素,然后单击下一个按钮以转到下 10 个元素。如何设置 10 个数据?我关注这篇文章 http://rakhi577.wordpress.com/2013/05/20/listview-pagination-ex-2/这是我的代码。你能帮我看看我的代码或有关如何正确实现此代码的指南链接吗?
public class MainActivity extends ListActivity {
Context context;
Button btnSearch ;
EditText txtSearch;
private ProgressDialog pDialog;
// URL to get contacts JSON
public int TOTAL_LIST_ITEMS = 50;
public int NUM_ITEMS_PAGE = 10;
private int noOfBtns;
private Button[] btns;
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
// contacts JSONArray
JSONArray contacts = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSearch=(Button)findViewById(R.id.buttonSearch);
txtSearch=(EditText)findViewById(R.id.Searchtext);
}
public String gotourl()
{
final EditText txtSearch=(EditText)findViewById(R.id.Searchtext);
String ts=txtSearch.getText().toString();
String url = "http://latest.bloomapi.com/api/search?limit=50&offset=0&key1=last_name&op1=eq&value1="+ts;
return url ;
}
public void Searchfunction(View v)
{
Btnfooter();
//loadList(0);
CheckBtnBackGroud(0);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
String cost = ((TextView) view.findViewById(R.id.email))
.getText().toString();
String description = ((TextView) view.findViewById(R.id.mobile))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleContactActivity.class);
in.putExtra(TAG_NAME, name);
in.putExtra(TAG_EMAIL, cost);
in.putExtra(TAG_PHONE_MOBILE, description);
startActivity(in);
}
});
// Calling async task to get json
new GetContacts().execute();
}
private void Btnfooter()
{
int val = TOTAL_LIST_ITEMS%NUM_ITEMS_PAGE;
val = val==0?0:1;
noOfBtns=TOTAL_LIST_ITEMS/NUM_ITEMS_PAGE+val;
LinearLayout ll = (LinearLayout)findViewById(R.id.btnLay);
btns =new Button[noOfBtns];
for(int i=0;i<noOfBtns;i++)
{
btns[i] = new Button(this);
btns[i].setBackgroundColor(getResources().getColor(android.R.color.transparent));
btns[i].setText(""+(i+1));
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
ll.addView(btns[i], lp);
final int j = i;
btns[j].setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
//loadList(j);
CheckBtnBackGroud(j);
}
});
}
}
private void CheckBtnBackGroud(int index)
{
for(int i=0;i<noOfBtns;i++)
{
if(i==index)
{
btns[index].setBackgroundDrawable(getResources().getDrawable(R.drawable.box_green));
btns[i].setTextColor(getResources().getColor(android.R.color.white));
}
else
{
btns[i].setBackgroundColor(getResources().getColor(android.R.color.transparent));
btns[i].setTextColor(getResources().getColor(android.R.color.black));
}
}
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(gotourl(), ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
// Getting JSON Array node
contacts = jsonObj.getJSONArray("result");
// looping through All Contacts
for (int i = 0; i < contacts.length(); i++) {
Integer a = contacts.length();
Log.d("loop", a.toString());
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("npi");
String name = c.getString("first_name");
String email = c.getString("last_name");
//String address = c.getString(TAG_ADDRESS);
String gender = c.getString("type");
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put("npi", id);
contact.put("first_name", name);
contact.put("last_name", email);
//contact.put(TAG_PHONE_MOBILE, mobile);
contact.put("type", gender);
// adding contact to contact list
contactList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.d("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list_item, new String[] { "first_name", "last_name",
"type" }, new int[] { R.id.name,
R.id.email, R.id.mobile });
setListAdapter(adapter);
}
}}
我更改代码。当我单击下一步按钮时 [如 2、3、4、5]。显示第一页数据。这是我修改后的代码。感谢任何帮助:
public class MainActivity extends ListActivity {
private TextView title;
Context context;
Button btnSearch ;
EditText txtSearch;
private ListView listview;
private ProgressDialog pDialog;
// URL to get contacts JSON
public int TOTAL_LIST_ITEMS = 50;
public int NUM_ITEMS_PAGE = 10;
private int noOfBtns;
private Button[] btns;
// JSON Node names
private static final String TAG_CONTACTS = "contacts";
private static final String TAG_ID = "id";
private static final String TAG_NAME = "name";
private static final String TAG_EMAIL = "email";
private static final String TAG_ADDRESS = "address";
private static final String TAG_GENDER = "gender";
private static final String TAG_PHONE = "phone";
private static final String TAG_PHONE_MOBILE = "mobile";
private static final String TAG_PHONE_HOME = "home";
private static final String TAG_PHONE_OFFICE = "office";
// contacts JSONArray
JSONArray contacts = null;
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnSearch=(Button)findViewById(R.id.buttonSearch);
txtSearch=(EditText)findViewById(R.id.Searchtext);
title = (TextView)findViewById(R.id.title);
}
public String gotourl()
{
final EditText txtSearch=(EditText)findViewById(R.id.Searchtext);
String ts=txtSearch.getText().toString();
String url = "http://latest.bloomapi.com/api/search?limit=50&offset=0&key1=last_name&op1=eq&value1="+ts;
return url ;
}
public void Searchfunction(View v)
{
Btnfooter();
CheckBtnBackGroud(0);
contactList = new ArrayList<HashMap<String, String>>();
ListView lv = getListView();
// Listview on item click listener
lv.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
if(position%2==0)
{
view.setBackgroundColor(Color.parseColor("#F4FA58"));
}else
{
view.setBackgroundColor(Color.parseColor("#DA81F5"));
}
// getting values from selected ListItem
String name = ((TextView) view.findViewById(R.id.name))
.getText().toString();
String cost = ((TextView) view.findViewById(R.id.email))
.getText().toString();
String description = ((TextView) view.findViewById(R.id.mobile))
.getText().toString();
// Starting single contact activity
Intent in = new Intent(getApplicationContext(),
SingleContactActivity.class);
in.putExtra(TAG_NAME, name);
in.putExtra(TAG_EMAIL, cost);
in.putExtra(TAG_PHONE_MOBILE, description);
startActivity(in);
}
});
// Calling async task to get json
new GetContacts().execute();
}
private void Btnfooter()
{
int val = TOTAL_LIST_ITEMS%NUM_ITEMS_PAGE;
val = val==0?0:1;
noOfBtns=TOTAL_LIST_ITEMS/NUM_ITEMS_PAGE+val;
LinearLayout ll = (LinearLayout)findViewById(R.id.btnLay);
btns =new Button[noOfBtns];
for(int i=0;i<noOfBtns;i++)
{
btns[i] = new Button(this);
btns[i].setBackgroundColor(getResources().getColor(android.R.color.transparent));
btns[i].setText(""+(i+1));
LinearLayout.LayoutParams lp = new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
ll.addView(btns[i], lp);
final int j = i;
btns[j].setOnClickListener(new OnClickListener() {
public void onClick(View v)
{
new GetContacts().execute();
CheckBtnBackGroud(j);
}
});
}
}
private void CheckBtnBackGroud(int index)
{
title.setText("Page "+(index+1)+" of "+noOfBtns);
for(int i=0;i<noOfBtns;i++)
{
if(i==index)
{
btns[index].setBackgroundDrawable(getResources().getDrawable(R.drawable.box_green));
btns[i].setTextColor(getResources().getColor(android.R.color.white));
}
else
{
btns[i].setBackgroundColor(getResources().getColor(android.R.color.transparent));
btns[i].setTextColor(getResources().getColor(android.R.color.black));
}
}
}
private class GetContacts extends AsyncTask<Void, Void, Void> {
@Override
protected void onPreExecute() {
super.onPreExecute();
// Showing progress dialog
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Please wait...");
pDialog.setCancelable(false);
pDialog.show();
}
@Override
protected Void doInBackground(Void... arg0) {
// Creating service handler class instance
ServiceHandler sh = new ServiceHandler();
// Making a request to url and getting response
String jsonStr = sh.makeServiceCall(gotourl(), ServiceHandler.GET);
Log.d("Response: ", "> " + jsonStr);
if (jsonStr != null) {
try {
JSONObject jsonObj = new JSONObject(jsonStr);
int number = 0;
int start = number * NUM_ITEMS_PAGE;
// looping through All Contacts
// Getting JSON Array node
contacts = jsonObj.getJSONArray("result");
// looping through All Contacts
//for (int i = 0; i < contacts.length(); i++) {
for(int i=start;i<(start)+NUM_ITEMS_PAGE;i++) {
Integer a = contacts.length();
Log.d("loop", a.toString());
JSONObject c = contacts.getJSONObject(i);
String id = c.getString("npi");
String name = c.getString("first_name");
String email = c.getString("last_name");
String gender = c.getString("type");
// tmp hashmap for single contact
HashMap<String, String> contact = new HashMap<String, String>();
// adding each child node to HashMap key => value
contact.put("npi", id);
contact.put("first_name", name);
contact.put("last_name", email);
//contact.put(TAG_PHONE_MOBILE, mobile);
contact.put("type", gender);
// adding contact to contact list
contactList.add(contact);
}
} catch (JSONException e) {
e.printStackTrace();
}
} else {
Log.d("ServiceHandler", "Couldn't get any data from the url");
}
return null;
}
@Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
// Dismiss the progress dialog
if (pDialog.isShowing())
pDialog.dismiss();
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(
MainActivity.this, contactList,
R.layout.list_item, new String[] { "first_name", "last_name",
"type" }, new int[] { R.id.name,
R.id.email, R.id.mobile });
setListAdapter(adapter);
}
}}
最佳答案
下面是我的代码,用于显示带分页的 ListView 。有两个蓝色按钮用于更改页面。
您可以根据需要进行定制。
创建 UserCategory.java
package com.UserCategory;
import java.net.URL;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.ArrayAdapter;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.ListView;
public class UserCategory extends Activity implements OnClickListener{
private final int PAGE_SIZE = 5;
private int StartingIndex = 0;
ArrayList<String> userClass=new ArrayList<String>();
int textlength=0;
private String lv_arr[];
private ListView lv1;
EditText searchText;
//Button Previous;
private String Machine[]={"Machine 1","Machine 2","Machine 3","Machine 4","Machine 5","Machine 6","Machine 7","Machine 8","Machine 9","Machine 10","Machine 11","Machine 12","Machine 1","Machine 2","Machine 3","Machine 4","Machine 5","Machine 6","Machine 7","Machine 8","Machine 9","Machine 10","Machine 11","Machine 12"};
ImageView next,Previous;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().requestFeature(Window.FEATURE_NO_TITLE);
setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
setContentView(R.layout.main);
lv1=(ListView)findViewById(R.id.ListView01);
searchText=(EditText)findViewById(R.id.et_Serchlist);
next=(ImageView)findViewById(R.id.btn_next);
Previous=(ImageView)findViewById(R.id.btn_previous);
next.setOnClickListener(this);
Previous.setOnClickListener(this);
//parsing();
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , Machine));
changeListViewModel(0);
}
private void changelist(int startingIndex) {
if(startingIndex < 0) {
Previous=(ImageView)findViewById(R.id.btn_previous);
ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
back.setVisibility(1);
Previous.setVisibility(4);
startingIndex = 0;
}else if(startingIndex >= userClass.size())
startingIndex -= PAGE_SIZE;
StartingIndex = startingIndex;
int endingIndex = startingIndex + PAGE_SIZE;
System.out.println("ending index"+endingIndex);
if(StartingIndex!=0){
Previous=(ImageView)findViewById(R.id.btn_previous);
ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
back.setVisibility(4);
Previous.setVisibility(1);
}
if(endingIndex == userClass.size()){
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(1);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(4);
}
if(endingIndex != userClass.size()){
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(4);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(1);
}
if(endingIndex > userClass.size()) endingIndex = userClass.size();
try {
String[] subSet = getDataSubset1(startingIndex, endingIndex);
System.out.println("subSet array"+subSet);
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , subSet));
} catch (Exception e) {
e.printStackTrace();
}
}
private String[] getDataSubset1(int startingIndex, int endingIndex){
String[] changeList = new String[endingIndex - startingIndex];
int index = -1;
for(int x = startingIndex; x < endingIndex; x++)
changeList[++index] = userClass.get(x);
return changeList;
}
private void changeListViewModel(int startingIndex){
if(startingIndex < 0) {
Previous=(ImageView)findViewById(R.id.btn_previous);
ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
back.setVisibility(1);
Previous.setVisibility(4);
startingIndex = 0;
}
else if(startingIndex >= Machine.length){
startingIndex -= PAGE_SIZE;
}
System.out.println("strating"+startingIndex);
System.out.println("startingIndex"+startingIndex);
StartingIndex = startingIndex;
int endingIndex = startingIndex + PAGE_SIZE;
System.out.println("endingIndex"+endingIndex);
if(StartingIndex!=0)
{
Previous=(ImageView)findViewById(R.id.btn_previous);
ImageView back=(ImageView)findViewById(R.id.btn_Whiteprevious);
back.setVisibility(4);
Previous.setVisibility(1);
}
if(endingIndex == userClass.size()){
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(1);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(4);
}
if(endingIndex != userClass.size()){
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(4);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(1);
}
System.out.println("ending index"+endingIndex);
if(endingIndex > Machine.length) {
endingIndex = Machine.length;
ImageView Forward=(ImageView)findViewById(R.id.btn_grewforward);
Forward.setVisibility(1);
next=(ImageView)findViewById(R.id.btn_next);
next.setVisibility(4);
}
String[] subSet = getDataSubset(startingIndex, endingIndex);
System.out.println("subSet main array"+subSet.length);
lv1.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1 , subSet));
}
private String[] getDataSubset(int startingIndex, int endingIndex){
String[] toRet = new String[endingIndex - startingIndex];
int index = -1;
System.out.println("index"+index);
for(int x = startingIndex; x < endingIndex; x++)
toRet[++index] = Machine[x];
return toRet;
}
private void parsing() {
// TODO Auto-generated method stub
try {
URL url = new URL("http://10.10.1.100/DogEventsWebService/EventService.svc/categories/1");
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new InputSource(url.openStream()));
doc.getDocumentElement().normalize();
NodeList nodeList = doc.getElementsByTagName("UserCategory");
Machine = new String[nodeList.getLength()];
for (int i = 0; i < nodeList.getLength(); i++)
{
Node node = nodeList.item(i);
Machine[i] = new String();
Element fstElmnt = (Element) node;
NodeList nameList = fstElmnt.getElementsByTagName("ClassDescription");
Element nameElement = (Element) nameList.item(0);
nameList = nameElement.getChildNodes();
Machine[i]=((Node) nameList.item(0)).getNodeValue();
}
System.out.println("after for loop Machine"+Machine);
} catch (Exception e) {
System.out.println("XML Pasing Excpetion = " + e);
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.btn_next:
textlength=searchText.getText().length();
System.out.println("nextbutton"+textlength);
if(textlength==0){
changeListViewModel(StartingIndex + PAGE_SIZE);
}else{
changelist(StartingIndex + PAGE_SIZE);
}
break;
case R.id.btn_previous:
textlength=searchText.getText().length();
if(textlength==0){
changeListViewModel(StartingIndex - PAGE_SIZE);
}else{
changelist(StartingIndex - PAGE_SIZE);
}
break;
default:
break;
}
}
创建 main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<View android:layout_height="35dp"
android:layout_width="fill_parent"
android:background="#ffffff"/>
<TextView android:id="@+id/tv_header"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello"
android:layout_alignParentTop="true"
android:layout_marginLeft="0dp"
android:textSize="25dp"/>
<EditText
android:id="@+id/et_Serchlist"
android:layout_height="35dp"
android:paddingLeft="19dp"
android:layout_marginLeft="60dp"
android:layout_toRightOf="@+id/tv_header"
android:maxLength="20"
android:maxLines="1"
android:inputType="text"
android:hint="Search"
android:textColor="#ffffff"
android:background="@drawable/my_border"
android:layout_width="100dip"/>
<ListView
android:id="@+id/ListView01"
android:layout_width="fill_parent"
android:textSize="4px"
android:layout_below="@+id/tv_header"
android:layout_above="@+id/btn_previous"
android:layout_height="wrap_content" />
<View android:layout_height="55dp"
android:layout_below="@+id/ListView0"
android:layout_alignParentBottom="true"
android:layout_width="fill_parent"
android:background="#ffffff"/>
<ImageView
android:src="@drawable/grewprevious"
android:id="@+id/btn_Whiteprevious"
android:layout_width="wrap_content"
android:layout_marginLeft="12dp"
android:layout_marginBottom="6dp"
android:layout_below="@+id/ListView0"
android:visibility="invisible"
android:layout_alignParentBottom="true"
android:layout_height="wrap_content"/>
<ImageView
android:src="@drawable/right"
android:id="@+id/btn_grewforward"
android:layout_width="wrap_content"
android:layout_marginLeft="259dp"
android:layout_marginBottom="6dp"
android:layout_below="@+id/ListView0"
android:visibility="invisible"
android:layout_alignParentBottom="true"
android:layout_height="wrap_content"/>
<ImageView
android:src="@drawable/backward"
android:id="@+id/btn_previous"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_marginLeft="12dp"
android:layout_marginBottom="6dp"
android:layout_below="@+id/ListView0"
android:onClick="backButtonClicked"/>
<ImageView android:src="@drawable/forward"
android:id="@+id/btn_next"
android:layout_width="80dp"
android:layout_marginBottom="6dp"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_below="@+id/ListView0"
android:layout_marginLeft="249dp"
android:text="Next"
android:onClick="nextButtonClicked"/>
</RelativeLayout>
创建用户列表.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView android:id="@+id/tv_className"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>
</LinearLayout>
将 my_border.xml 添加到 Drawable 文件夹中:
<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android">
<stroke android:width="2dip" android:color="#ee777777" />
<solid android:color="#ee444444"/>
<padding
android:left="20dip"
android:top="2dip"
android:right="20dip"
android:bottom="2dip" />
<corners android:radius="15dip" />
![enter image description here][1]</shape>
如果 iamges 出现错误,则使用任何其他图像并运行应用程序。
让我知道它对你有用。
谢谢
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我之前在论坛上发布过这个,但我想我不太清楚。我有一个侧边栏 ListView 和一个包含我的控件的主面板。我想在 oncreate() 中突出显示 listview 中的 Activity 项,因为每
这里有没有人知道我如何通过 onTap() 扩展 ListView 项(在本例中为卡片)的内容 - 以显示更多选项?您知道那里有可以提供帮助的酒吧吗? 我已经看过了,但我不知道要搜索什么?我相信你们都
我的 ListView 控件有问题。我希望我的奇数行和偶数行具有不同的颜色,但我想通过代码而不是 FXML 来实现。例如: 第一行 - 绿色 第二行 - 红色 第三行 - 绿色 第四行 - 红色 现在
我有一个 ListView 。我想让单元格背景透明。目前,我正在做以下事情: .list-cell { -fx-background-color: transparent; } 但是,细胞的颜
我想创建一个几乎无限的元素列表,但我想将列表的初始位置设置为某个特定元素。像这张图片: 其中索引 0 将是初始位置,并且此列表可能会也可能不会在两个方向上延伸很长。 我可以像这样创建我的元素: W
有没有办法在JavaFX中获取ListView的可见项?我想确定 JavaFX 应用程序中 ListView 显示的第一个可见项。 以下代码found here不适合我(仅适用于 TableView)
开发人员。 我尝试在水平方向拉伸(stretch) ListView 项目。我确实重置了 ItemContainerStyle ,并且水平对齐是拉伸(stretch)的。这是 MainPage.xam
有没有办法在JavaFX中获取ListView的可见项?我想确定 JavaFX 应用程序中 ListView 显示的第一个可见项。 以下代码found here不适合我(仅适用于 TableView)
我想问一下: 我有一个预定义顺序的数组。 var order=new Array(); order[0]="Tesco"; order[1]="Interspar"; order[2]="
我希望创建以下内容:当到达内部 Listview 的顶部或底部时,我想继续在顶部 Listview 中滚动。见动图: Gif of what I got so far 一个选项是在到达底部时将内部 L
我正在尝试在 ajax 发布后刷新 jQuery 移动 ListView ,我一直在尝试使用 .trigger("create") 来执行此操作,如下所示: Most Played
我真的不明白是什么导致了错误我检查了文档,这里有一个非常相似的例子是我的 views.py,我使用的应用程序下的 urls.py 包含,以及模板 View .py class SchoolListVi
我有这个父布局 parent_listview 的列表项具有这种布局 child_listview 的项目有这个布局
我在单击列表项时获取 listview 项 时遇到问题。我得到了 simple listview(Arrayadapter) 的 listview item,但我遇到了 custom listview
我有一个工作正常的 DropdownMenu,但我需要一个 ListView,但我无法转换它。 DropdownMenu 如下所示: // Create the List of devices t
我想实现一个可滚动(垂直)且其中包含元素的屏幕。所以我把它放在 listview.builder 上。问题是,其中一个元素是另一个水平滚动的 listview.builder。当我实现它时,horiz
帮助!我想不通! 为了帮助我学习 SwiftUI,我正在使用 ListView 制作一个简单的杂货 list 应用程序。点击列表中的每个项目时,有些按钮会变成绿色或红色。 在我向列表数组中添加太多项目
所以我知道我们可以等待 ListView 加载,然后显示它。但是,如果我们动态加载正在下载的图像,ListView 将加载但图像尚未加载,因此它们不会出现在 ListView 中。 可接受的等待 Li
我是 Android 的新手,正在努力提高编程技能。 在这里,我有自定义 ListView 适配器类,我曾在其中显示 ListView 项目,如 TextView 、图像等。 我需要做的是,我在 Li
So, what I want is to individually disable a button for the concerned item in the ListView when clic
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