我对安卓很陌生。我正在尝试使用 arrayadapter 在项目列表上开发搜索功能，如下所示。但搜索无法正常工作。请帮助我
这是我的代码..
AddToOutlet.java
public class AddToOutlet extends Activity {
SessionManager session;
String success, cus_id, bus_id, cus_outlet;
ArrayList<Item> item;
com.amplio.MyCustomEditText editsearch;
// TextView tvcountoutlet;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.addtooutlet);
session = new SessionManager(getApplicationContext());
session.checkLoginback();
item = new ArrayList<Item>();
// get user data from session
HashMap<String, String> user = session.getUserDetails();
// ID
final String cus_id = user.get(SessionManager.KEY_ID);
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("cus_id", cus_id));
String response = null;
try {
response = LoginHttpClient
.executeHttpPost(
"http://10.0.2.2/android_api/add_to_outlet.php",
postParameters);
response = response.toString();
response = response.replaceAll("\\s+", "");
JSONObject json = new JSONObject(response);
JSONArray jArray = json.getJSONArray("customer");
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
Item it = new Item();
success = json_data.getString("success");
it.setBusname(json_data.getString("bus_name"));
it.setBusid(json_data.getString("bus_id"));
it.setCusId(cus_id);
item.add(it);
}
} catch (Exception e) {
e.printStackTrace();
}
ListView lv = (ListView) findViewById(R.id.list);
final MyAdapter adapter = new MyAdapter(AddToOutlet.this,
R.layout.addtooutlet_list_item, item);
lv.setAdapter(adapter);
// Locate the EditText in listview_main.xml
editsearch = (com.amplio.MyCustomEditText) findViewById(R.id.EditText01);
// Capture Text in EditText
editsearch.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
String text = editsearch.getText().toString()
.toLowerCase(Locale.getDefault());
adapter.filter(text);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
});
}
}
这是 MyAdapter.java
public class MyAdapter extends ArrayAdapter<Item> {
ArrayList<Item> item;
LayoutInflater mInflater;
Context context;
private List<Item> item1 = null;
public MyAdapter(Context context, int resource, ArrayList<Item> item) {
super(context, resource, item);
this.item = item;
this.context = context;
mInflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
return item.size();
}
@Override
public Item getItem(int position) {
return item.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = mInflater.inflate(R.layout.addtooutlet_list_item,
parent, false);
holder.tv1 = (TextView) convertView.findViewById(R.id.item_bname);
holder.tv2 = (TextView) convertView.findViewById(R.id.item_bid);
holder.tv3 = (TextView) convertView.findViewById(R.id.item_cid);
holder.b = (Button) convertView.findViewById(R.id.item_button);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
Item it = item.get(position);
holder.tv1.setText(it.getBusname());
holder.tv2.setText(it.getBusid());
holder.tv3.setText(it.getCusId());
holder.b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
// String Text1_value = holder.tv1.getText().toString();
// System.out.println(Text1_value);
String bid = holder.tv2.getText().toString();
System.out.println(bid);
String cid = holder.tv3.getText().toString();
System.out.println(cid);
holder.b.setText("Joined");
holder.b.setTextColor(Color.parseColor("#ffffff"));
holder.b.setTextSize(10);
// holder.b.setText("joined");
// Toast.makeText(context, "Join button Clicked",
// Toast.LENGTH_LONG).show();
ArrayList<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair("cus_id", cid));
postParameters.add(new BasicNameValuePair("bus_id", bid));
String response = null;
try {
response = LoginHttpClient
.executeHttpPost(
"http://10.0.2.2/android_api/update_outlet.php",
postParameters);
String res = response.toString();
res = res.replaceAll("\\s+", "");
int resInt = Integer.parseInt(res);
if (resInt == 1) {
} else {
}
} catch (Exception e) {
}
}
});
return convertView;
}
static class ViewHolder {
Button b;
TextView tv1, tv2, tv3;
}
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
item.clear();
if (charText.length() == 0) {
item.addAll(item);
} else {
for (Item wp : item) {
if (wp.getBusname().toLowerCase(Locale.getDefault())
.contains(charText)) {
item.add(wp);
}
}
}
notifyDataSetChanged();
}
}
这是Item.java
public class Item {
String busname, busid, cus_id;
public String getBusname() {
return busname;
}
public void setBusname(String busname) {
this.busname = busname;
}
public String getBusid() {
return busid;
}
public void setBusid(String busid) {
this.busid = busid;
}
public String getCusId() {
return cus_id;
}
public void setCusId(String cus_id) {
this.cus_id = cus_id;
}
}
这是 addtooutlet.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ffffff"
android:orientation="vertical" >
<!-- Editext for Search -->
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="1dp"
android:layout_marginLeft="10dp"
android:background="#ffffff" >
<com.amplio.MyCustomEditText
android:id="@+id/EditText01"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:layout_marginRight="40dp"
android:background="#00000000"
android:ems="20"
android:hint="@string/search"
android:lineSpacingExtra="5dp"
android:textSize="12sp" >
</com.amplio.MyCustomEditText>
</RelativeLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:background="#eeeeee" >
<ListView
android:id="@+id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:drawSelectorOnTop="false" />
</RelativeLayout>
</LinearLayout>
这是我的 addtooutlet_list_item.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="46dp"
android:background="#ffffff"
android:padding="5dip"
android:weightSum="100" >
<TextView
android:id="@+id/item_bname"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="20"
android:padding="2dp"
android:text="Hello"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#000000"
android:textSize="12dip" />
<TextView
android:id="@+id/item_bid"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="20"
android:padding="2dp"
android:text="Hello"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#000000"
android:textSize="12dip"
android:visibility="invisible" />
<TextView
android:id="@+id/item_cid"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="20"
android:padding="2dp"
android:text="Hello"
android:textAppearance="?android:attr/textAppearanceMedium"
android:textColor="#000000"
android:textSize="12dip"
android:visibility="invisible" />
<Button
android:id="@+id/item_button"
android:layout_width="31dp"
android:layout_height="31dp"
android:layout_alignParentBottom="true"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/item_bname"
android:background="@drawable/circle"
android:focusable="false"
android:focusableInTouchMode="false"
android:text="join"
android:textColor="#ffffff"
android:textSize="10sp" />
</RelativeLayout>