问题描述
我不知道如何使一个函数通过点击基于列表视图下一个/ previous按钮，显示下一个/ previous详细数据。
i don't know how to make a function to show the next/previous detail data by clicking the next/previous button based on listview.
这就是我想要做的截图
我的详细资料活动，显示下一/ $ P $从列表视图pvious数据
My Detail data Activity, to show next/previous data from listview
编辑：我有一个ListView数据（使用XML解析器），并将数据传递到新的活性的研究被称为Detail_toko.class：
EDIT : i have a listview data (use xml parser), and pass the data to new acitivity called "Detail_toko.class" :
List<NameValuePair> paramemeter = new ArrayList<NameValuePair>();
paramemeter.add(new BasicNameValuePair("keyword", "a"));
// paramemeter.add(new BasicNameValuePair("kategori",Category.getSelectedItem().toString()));
XMLParser parser = new XMLParser();
String xml = parser.getXmlFromUrl(URL, paramemeter); // getting XML from URL
Document doc = parser.getDomElement(xml); // getting DOM element
NodeList nl = doc.getElementsByTagName(TAG_DETAIL);
// looping through all song nodes <song>
for (int i = 0; i < nl.getLength(); i++) {
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
Element e = (Element) nl.item(i);
// adding each child node to HashMap key => value
map.put(TAG_ID, parser.getValue(e, TAG_ID));
map.put(TAG_NAMATOKO, parser.getValue(e, TAG_NAMATOKO));
map.put(TAG_KATEGORI, parser.getValue(e, TAG_KATEGORI));
map.put(TAG_EMAIL, parser.getValue(e, TAG_EMAIL));
map.put(TAG_ICON, parser.getValue(e, TAG_ICON));
// adding HashList to ArrayList
PremiumList.add(map);
}
return null;
}
/**
* Updating parsed JSON data into ListView
* */
list=(ListView)findViewById(R.id.listview);
if(PremiumList.size() > 0)
{
adapter=new LazyAdapterStore(ListPerusahaan.this, PremiumList);
list.setAdapter(adapter);
}
else
{
Toast toast= Toast.makeText(getApplicationContext(), "No data found, enter another keyword", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
// Click event for single list row
list.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// getting values from selected ListItem
String nama_toko = ((TextView) view.findViewById(R.id.nama_toko)).getText().toString();
String kategori = ((TextView) view.findViewById(R.id.kategori)).getText().toString();
String email = ((TextView) view.findViewById(R.id.email)).getText().toString();
PremiumList = new ArrayList<HashMap<String, String>>();
Intent in = new Intent(ListPerusahaan.this, Detail_toko.class);
in.putExtra("PremiumList", PremiumList);
//in.putStringArrayListExtra( "PremiumList", PremiumList );
in.putExtra("position", position);
in.putExtra("TotalData", TotalData);
in.putExtra(TAG_NAMATOKO, nama_toko);
in.putExtra(TAG_KATEGORI, kategori);
in.putExtra(TAG_EMAIL, email);
startActivity(in);
这是我LazyAdapterStore code：
This is my LazyAdapterStore code :
public View getView(int position, View convertView, ViewGroup parent) {
View vi=convertView;
if(convertView==null)
vi = inflater.inflate(R.layout.list_data_store, null);
TextView nama_toko = (TextView)vi.findViewById(R.id.nama_toko); // title
TextView kategori = (TextView)vi.findViewById(R.id.kategori); // title
ImageView thumb_image=(ImageView)vi.findViewById(R.id.list_image); // thumb image
TextView email = (TextView)vi.findViewById(R.id.email); // artist name
HashMap<String, String> detail = new HashMap<String, String>();
detail = data.get(position);
// Setting all values in listview
nama_toko.setText(detail.get(ListPerusahaan.TAG_NAMATOKO));
kategori.setText(detail.get(ListPerusahaan.TAG_KATEGORI));
email.setText(detail.get(ListPerusahaan.TAG_EMAIL));
imageLoader.DisplayImage(detail.get(ListPerusahaan.TAG_ICON), thumb_image);
return vi;
}
编辑：，然后，这是我的新活动Detail_Toko从列表视图项显示明细数据：
EDIT : and, this is my new activity "Detail_Toko" to display detail data from listview items :
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//this must be called BEFORE setContentView
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.detail_toko);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.window_title);
call_btn=(Button)findViewById(R.id.call);
email_btn=(Button)findViewById(R.id.email);
sms_btn=(Button)findViewById(R.id.sms);
Next_btn=(Button)findViewById(R.id.Next);
Prev_btn=(Button)findViewById(R.id.Prev);
phonenumber=(TextView)findViewById(R.id.telpon);
// getting intent data
Intent in = getIntent();
// @SuppressWarnings("unchecked")
//ArrayList<HashMap<String, String>> PremiumList = (ArrayList<HashMap<String, String>>) getIntent().getSerializableExtra("PremiumList");
// Get String values from previous intent
final String nama_toko = in.getStringExtra(TAG_NAMATOKO);
final String kategori = in.getStringExtra(TAG_KATEGORI);
final String email = in.getStringExtra(TAG_EMAIL);
// Get Int values from previous intent
final int posisi = in.getExtras().getInt("position");
final int Total_data = in.getExtras().getInt("TotalData");
/*
Bundle bundle = in.getExtras();
HashMap<String, String> list = (HashMap<String, String>) bundle.getSerializable("PremiumList");
list = data.get(currentposition);
*/
Bundle bundle = in.getExtras();
HashMap<String, String> list = (HashMap<String, String>) bundle.getSerializable("PremiumList");
list = data.get(currentposition);
// Displaying all values on the screen
lblPosisi = (TextView) findViewById(R.id.namatoko);
lbltotaldata = (TextView) findViewById(R.id.nama);
lblNamatoko = (TextView) findViewById(R.id.nama_toko);
lblKategori = (TextView) findViewById(R.id.kategori);
lblEmail = (TextView) findViewById(R.id.textemail);
lblPosisi.setText(String.valueOf(posisi));
lbltotaldata.setText(String.valueOf(Total_data));
lblNamatoko.setText(nama_toko);
lblKategori.setText(kategori);
lblEmail.setText(email);
// Set the int value of currentposition from previous selected listview item
currentposition = posisi;
Next_btn.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
if(currentposition >= Total_data - 1)
{
Toast toast= Toast.makeText(getApplicationContext(), "Last Record", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
else
{
currentposition++;
lblPosisi.setText(String.valueOf(currentposition));
lblNamatoko.setText(list.get(nama_toko));
lblKategori.setText(list.get(kategori));
lblEmail.setText(list.get(email));
}
}
});
Prev_btn.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
if(currentposition <= 0)
{
Toast toast= Toast.makeText(getApplicationContext(), "First Record", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
else
{
currentposition--;
lblPosisi.setText(String.valueOf(currentposition));
lblNamatoko.setText(list.get(nama_toko));
lblKategori.setText(list.get(kategori));
lblEmail.setText(list.get(email));
}
}
});
问题是，我不知道如何使一个函数通过单击Detail_toko活动下一/ previous按钮，显示从列表视图下一个/ previous详细数据。请帮助我的人......
the problem is, i don't know how to make a function to show the next/previous detail data from listview by clicking the next/previous button in "Detail_toko" activity.Please someone Help me...
感谢提前
推荐答案
刚刚看到你的要求的最后一个职位上。
Just seen your request on last post.
由Parvaz给出的解决方案是完美的，你只需要弄清楚code。你有一个ArrayListpremiumList这是负责你的ListView行的数据。所有你需要的是（使用parceable或声明的ArrayList是静态的（不推荐）等通过意向）和您的解决方案将是几个步之遥传位置，该列表Detail_toko.class。
Solution given by Parvaz is perfect, you just need to figure out the code.You have an arraylist "PremiumList" which is responsible for your listview rows data.All you need is to pass position and this list to Detail_toko.class (via intent using parceable or declaring arraylist as static (not recommended) etc. ) and your solution will be couple of steps away.
在Detail_toko.class创建一个全局变量currentPosition这会得到其数值从以往的活动一样TAG_NAMATOKO的意图。然后在点击下一步按钮增加1 onClickListener到currentPosition，并得到详细的从你的ArrayList你刚才从去年的活动运送正如你在getView方法做了。
In Detail_toko.class create a global variable currentPosition which will get its value from past activity like TAG_NAMATOKO from intent.Then in onClickListener of NEXT button increment 1 to currentPosition and get detail from your arraylist you have just transported from last activity as you have done in your getView method.
HashMap<String, String> detail = new HashMap<String, String>();
detail = data.get(currentPosition);
// Setting all values in listview
nama_toko = detail.get(ListPerusahaan.TAG_NAMATOKO);
kategori = detail.get(ListPerusahaan.TAG_KATEGORI);
email = detail.get(ListPerusahaan.TAG_EMAIL);
设置这些值和新视图将随之更新。
Set these values and your new view will be updated accordingly.
在preVIOUS按钮onClickListener递减1从currentPosition，其次是相同的code（这意味着你必须创建一个方法调用，没有code重复）。
In onClickListener of PREVIOUS button decrement 1 from currentPosition, followed by same code (which means you must create a method and call that, no code repetition).
试试看。这是尽可能详细，我们可在不实际做作业解释！
Try it. This is as detailed as we can explain without actually doing your homework !
编辑：
首先从OnItemClick删除此行
First of all remove this line from OnItemClick
PremiumList = new ArrayList<HashMap<String, String>>();
您是从premiumList清除所有数据在这条线上，这样你会得到空白列表中的下一个活动。因此，摆脱这一行。 一旦你将获得premiumList在你的下一个活动，你需要的是位置和totalData随着它的意图额外的费用。 你可以从你的意图的额外摆脱TAG_NAMATOKO，TAG_KATEGORI，TAG_EMAIL。
You are clearing all the data from PremiumList in this line and this way you will get blank list in next activity. So get rid of this line. Once you will get PremiumList in your next activity, all you need is position and totalData along with it in intent extra. You can get rid of TAG_NAMATOKO, TAG_KATEGORI,TAG_EMAIL from your intent extra.
我告诉过你不要重复code，因为你是初学者是非常重要的，你跟着，因为它会让你的生活轻松通过 采取这样的考虑，使你的习惯中。
I had told you to not to repeat the code, as you are beginner it is very important for you to follow as it will make your life easy by taking such considerations and making your habbit.
现在你code中的Detail_Toko将变成：
Now your code in "Detail_Toko" will become:
HashMap<String, String> list = null;
int currentposition = 0;
int Total_data =0;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//this must be called BEFORE setContentView
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
setContentView(R.layout.detail_toko);
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.window_title);
call_btn=(Button)findViewById(R.id.call);
email_btn=(Button)findViewById(R.id.email);
sms_btn=(Button)findViewById(R.id.sms);
Next_btn=(Button)findViewById(R.id.Next);
Prev_btn=(Button)findViewById(R.id.Prev);
phonenumber=(TextView)findViewById(R.id.telpon);
// Displaying all values on the screen
lblPosisi = (TextView) findViewById(R.id.namatoko);
lbltotaldata = (TextView) findViewById(R.id.nama);
lblNamatoko = (TextView) findViewById(R.id.nama_toko);
lblKategori = (TextView) findViewById(R.id.kategori);
lblEmail = (TextView) findViewById(R.id.textemail);
// getting intent data
Bundle bundle = getIntent().getExtras();
// Get Int values from previous intent
currentposition = bundle.getInt("position");
Total_data = bundle.getInt("TotalData");
list = (HashMap<String, String>) bundle.get("PremiumList");
setView();
Next_btn.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
if(currentposition >= Total_data - 1)
{
Toast toast= Toast.makeText(getApplicationContext(), "Last Record", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
else
{
currentposition++;
setView();
}
}
});
Prev_btn.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){
if(currentposition <= 0)
{
Toast toast= Toast.makeText(getApplicationContext(), "First Record", Toast.LENGTH_SHORT);
toast.setGravity(Gravity.CENTER_VERTICAL|Gravity.CENTER_HORIZONTAL, 0, 0);
toast.show();
}
else
{
currentposition--;
setView();
}
}
});
private void setView()
{
if(list != null && list.size() > currentposition)
{
HashMap<String, String> detail = new HashMap<String, String>();
detail = list.get(currentposition);
lblPosisi.setText(String.valueOf(currentposition));
lbltotaldata.setText(String.valueOf(Total_data));
lblNamatoko.setText(detail.get(ListPerusahaan.TAG_NAMATOKO));
lblKategori.setText(detail.get(ListPerusahaan.TAG_KATEGORI));
lblEmail.setText(detail.get(ListPerusahaan.TAG_EMAIL));
}
}
建议：使用ViewHolder填充视图getView方法，它会使你的适配器的efficent适配器。 （搜索例子） 按照命名规则，所有。 使用，并bundle.containKey等东西，以避免致命的异常像NullPointerException异常前检查anyObject！= NULL，它们的大小和长度。
Suggestion: Use ViewHolder to populate view in getView Method, it will make your adapter "An efficent adapter". (search for examples) Follow naming convention and all. Check anyObject != null , their size or length before using them and bundle.containKey etc stuff to avoid fatal exception like nullPointerException.
这篇关于获取下一步，previous详细数据的列表视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！