本文介绍了如何设置在ListView JSON解析数据，然后添加搜索功能在里面的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我是新来的Android和要分析在ListView JSON数据，然后添加搜索功能吧，但我不知道如何添加搜索，
该javaa类
i am new to android and want to parse json data in a listview and then adding search functionally to it,but i dont know how to add search,
The javaa class is
public class AndroidJSONParsingActivity extends ListActivity {
// url to make request
private static String url = "http://10.0.2.2/quick/punk.php";
// JSON Node names
private static final String TAG_CUSTOMER = "Customer";
private static final String TAG_CUSTOMER_CODE = "customer_code";
private static final String TAG_CUSTOMER_NAME = "customer_name";
private static final String TAG_CUSTOMER_MOBILE = "customer_mobile";
private static final String TAG_CUSTOMER_ADDRESS = "customer_address";
// contacts JSONArray
JSONArray Customer = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Hashmap for ListView
ArrayList<HashMap<String, String>> contactList = new ArrayList<HashMap<String, String>>();
// Creating JSON Parser instance
JSONParser jParser = new JSONParser();
// getting JSON string from URL
JSONObject json = jParser.getJSONFromUrl(url);
try {
// Getting Array of Contacts
Customer = json.getJSONArray(TAG_CUSTOMER);
// looping through All Contacts
for(int i = 0; i < Customer.length(); i++){
JSONObject c = Customer.getJSONObject(i);
// Storing each json item in variable
String customer_code = c.getString(TAG_CUSTOMER_CODE);
String customer_name = c.getString(TAG_CUSTOMER_NAME);
String customer_mobile = c.getString(TAG_CUSTOMER_MOBILE);
String customer_address = c.getString(TAG_CUSTOMER_ADDRESS);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put(TAG_CUSTOMER_CODE, customer_code);
map.put(TAG_CUSTOMER_NAME, customer_name);
map.put(TAG_CUSTOMER_MOBILE, customer_mobile);
map.put(TAG_CUSTOMER_ADDRESS, customer_address);
// adding HashList to ArrayList
contactList.add(map);
}
} catch (JSONException e) {
e.printStackTrace();
}
/**
* Updating parsed JSON data into ListView
* */
ListAdapter adapter = new SimpleAdapter(this, contactList,
R.layout.list_item,
new String[] { TAG_CUSTOMER_CODE, TAG_CUSTOMER_NAME,TAG_CUSTOMER_MOBILE,TAG_CUSTOMER_ADDRESS}, new int[] {
R.id.code, R.id.name,R.id.mobile,R.id.address});
setListAdapter(adapter);
}
}
XML文件
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<EditText
android:id="@+id/search"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<!-- Main ListView
Always give id value as list(@android:id/list)
-->
<Button
android:id="@+id/button1"
android:layout_width="50dip"
android:layout_height="wrap_content"
android:text="+" />
<ListView
android:id="@android:id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
我要的是，当用户在文本框中东西，它应该被搜索的数据是存在的列表中。任何一个可以告诉我如何实现它？
What I want is that when user types something in the textbox, it should be searched in the data that is there in the list. Can any one tell me how to implement it?
推荐答案
使用自定义列表适配器来显示在列表视图项。显示在顶部的EDITTEXT。对于自定义列表视图的.
Use a Custom List adapter to display items in listview. Display a editText on the top.For custom Listview http://www.androidhive.info/2012/02/android-custom-listview-with-image-and-text/.
有关搜索列表视图。How我可以过滤的ListView数据的EditText android的打字的时候。
For searching listview.How can I filter ListView data when typing on EditText in android.
有关自定义搜索implement搜索自定义列表视图。我建议你去搜索上的自定义列表视图与过滤器。
For custom searchimplement search on a custom listview. I suggest you to go with search on custom listview with filters.
修改
activity_main.xml
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical">
<EditText
android:id="@+id/search"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
<ListView
android:id="@+id/list"
android:layout_width="fill_parent"
android:layout_height="wrap_content"/>
</LinearLayout>
MainActivity类
MainActivity Class
public class MainActivity extends Activity {
ArrayList<NewData> mTemp=new ArrayList<NewData>();
ArrayList<NewData> mPostingData=new ArrayList<NewData>();
ArrayList< NewData> mOri = new ArrayList<NewData>();
Myadapter ma;
EditText search;
NewData nd;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
for(int i = 0; i < 20; i++)
{
// Add your Json Parsed Data here
// each item from json add it to hash map in NewData class. Arraylist of 0 contains jsondata of customer1
nd=new NewData();
nd.newDatacus.put(NewData.TAG_CUSTOMER_CODE, "i"+i);
nd.newDatacus.put(NewData.TAG_CUSTOMER_NAME, "a"+i);
nd.newDatacus.put(NewData.TAG_CUSTOMER_MOBILE, "number");
nd.newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS, "address");
mOri.add(nd);
}
ma= new Myadapter(MainActivity.this);
mPostingData=mOri;
mTemp=mOri;
ListView lv= (ListView) findViewById(R.id.list);
lv.setAdapter(ma);
search= (EditText) findViewById(R.id.search);
search.addTextChangedListener(new TextWatcher() {
public void onTextChanged(CharSequence s, int start, int before, int count) {
ma.getFilter().filter(s);
ma.notifyDataSetChanged();
}
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
public void afterTextChanged(Editable s) {
}
});
}
class Myadapter extends ArrayAdapter
{
LayoutInflater mInflater;
public void setData(ArrayList<NewData> mPpst) {
mPostingData = mPpst;//contains class items data.
}
@Override
public Filter getFilter() {
return new Filter() {
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results != null && results.count >= 0) {
setData((ArrayList<NewData>) results.values);//if results of search is null set the searched results data
} else {
setData(mOri);// set original values
}
notifyDataSetInvalidated();
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults result = new FilterResults();
if (!TextUtils.isEmpty(constraint)) {
constraint = constraint.toString().toLowerCase();
ArrayList<NewData> foundItems = new ArrayList<NewData>();
if(mTemp!=null)
{
for(int i=0;i<mTemp.size();i++)
{
if (mTemp.get(i).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString().contains(constraint)) {
System.out.println("My datas"+mTemp.get(i).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString());
foundItems.add(mTemp.get(i));
}
else
{
}
}
}
result.count = foundItems.size();//search results found return count
result.values = foundItems;// return values
}
else
{
result.count=-1;// no search results found
}
return result;
}
};
}
public Myadapter(Context context) {
super(context, 0);
mInflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
// TODO Auto-generated constructor stub
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return mPostingData.size();
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return 0;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder holder;
if(mOri == null ){
return null;
}
// When convertView is not null, we can reuse it directly, there is no need
// to reinflate it. We only inflate a new View when the convertView supplied
// by ListView is null.
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list, null);
convertView.setLayoutParams(new AbsListView.LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
// Creates a ViewHolder and store references to the two children views
// we want to bind data to.
holder = new ViewHolder();
holder.t1=(TextView) convertView.findViewById(R.id.textView1);
holder.t2 = (TextView) convertView.findViewById(R.id.textView2);
holder.t3 = (TextView) convertView.findViewById(R.id.textView3);
convertView.setTag(holder);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
holder.t1.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_CODE).toString());
holder.t2.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_NAME).toString());
holder.t3.setText(mPostingData.get(position).newDatacus.get(NewData.TAG_CUSTOMER_MOBILE).toString());
return convertView;
}
}
class ViewHolder
{
TextView t1,t2,t3;
}
}
list.xml到自定义列表适配器膨胀
list.xml to be inflated in custom list adapter
<?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"
android:orientation="horizontal" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:text="TextView" />
<TextView
android:id="@+id/textView2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:text="TextView" />
<TextView
android:id="@+id/textView3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dp"
android:text="TextView" />
</LinearLayout>
NewData讲座保存所有数据的HashMap
NewData Class- Holds all data in hashmap
public class NewData {
public static final String TAG_CUSTOMER_CODE = "customer_code";
public static final String TAG_CUSTOMER_NAME = "customer_name";
public static final String TAG_CUSTOMER_MOBILE = "customer_mobile";
public static final String TAG_CUSTOMER_ADDRESS = "customer_address";
Hashtable newDatacus=new Hashtable();
public NewData()
{
newDatacus.put(NewData.TAG_CUSTOMER_CODE,new String());
newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS,new String());
newDatacus.put(NewData.TAG_CUSTOMER_NAME,new String());
newDatacus.put(NewData.TAG_CUSTOMER_MOBILE,new String());
newDatacus.put(NewData.TAG_CUSTOMER_ADDRESS,new String());
}
}
修改，以便您在添加JSON数据的循环。我已经在这里搜索条件的客户ID。您可以根据自己的需要改变这一点。这code测试和它的作品。希望有人能提供更好的code。希望这可以帮助你。
Modify so that you add your json data in the for loop. I have made search criteria here customer id. You can change this according to your needs. This code is tested and it works. Hope someone can give a better code. Hope this helps you.
这篇关于如何设置在ListView JSON解析数据，然后添加搜索功能在里面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！