我在列表视图上工作，在此列表视图中有多个按钮，如删除，编辑等。我的列表视图活动正常，列表视图项从MySQL数据库中检索。我的问题是，最初加载列表视图项时所有按钮都被取消激活，当我点击列表视图行项目时，所有按钮都被激活并获得列表视图项目位置，按钮被放置在不同布局的列表视图屏幕中，之后，当我按下编辑按钮时，它会在编辑文本字段中显示另一个带有行项目的活动以进行编辑，如何解决我的问题。
请帮帮我..
谢谢＆amp;问候。
这是我的列表视图
final ListView lv = getListView();
// on seleting single product
// launching Edit Product Screen
lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,int position, long id) {
Toast.makeText(Waiting_ListViewActivity.this, "ITEM PRESSED" + position, Toast.LENGTH_SHORT).show();
//****************************EDIT BUTTON****************************************
modify=(Button)findViewById(R.id.modify);
// modify.setTag(position);
modify.setEnabled(true);
modify.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
if (Get_Wi_Fi_State() == false && (!tabname.equals("emulator")))
{
// Do whatever
showMessageBox("Notification.....!!", " Please Connect to Wi-Fi Network");
}
else
{
// int position = (Integer) v.getTag();
View parent = (View) v.getParent();
ListView lv = (ListView) parent.getParent();
final int position = lv.getPositionForView(parent);
exit.setEnabled(false);
sms.setEnabled(false);
waiting.setEnabled(false);
Intent i = new Intent(getApplicationContext(),Waiting_ModifyActivity.class);
// sending Srno to next activity
i.putExtra(TAG_SRNO, SRNO);
i.putExtra(TAG_NAME, NAME);
i.putExtra(TAG_MOBILE, MOB);
i.putExtra(TAG_NO_OF_PERSON, NOOFPERSON);
i.putExtra(TAG_SEATING_AREA, SEATINGAREA);
startActivity(i);
exit.setEnabled(true);
sms.setEnabled(true);
waiting.setEnabled(true);
delete.setEnabled(true);
}
}
});
这是我的Waiting_ModifyActivity.class ...
public class Waiting_ModifyActivity extends Activity implements menudatabse,OnClickListener{
EditText PersonSrno;
EditText PersonName;
EditText NoOfPerson;
EditText SeatingArea;
EditText PersonMobNo;
EditText persono;
EditText PersonTableNo;
EditText SendSMS;
Button btnUpdate;
Button btnDelete;
Button btnExit;
Button btnSend;
String NAME;
private String MOB;
private String NOOFPERSON;
private String SEATINGAREA;
String SRNO;
// Progress Dialog
private ProgressDialog pDialog;
// JSON parser class
JSONParser jsonParser = new JSONParser();
// products JSONArray
JSONArray products = null;
private Dialog dialog;
ProgressDialog PD;
final Context context = this;
ArrayList<HashMap<String, String>> productsList;
// single product url
private static String url_SingleRow_table = "http://192.168.1.198/android_connect/get_single_row.php";
// url to update product
private static String url_Updateistview_table = "http://192.168.1.198/android_connect/update_row.php";
// JSON Node names
private static final String TAG_SUCCESS = "success";
private static final String TAG_PRODUCTS = "products";
// private static final String TAG_PID = "pid";
private static final String TAG_SRNO = "SRNO"; // These are the same as php file name which should be pass is SRNO,NAME,MOBILE_NO
private static final String TAG_NAME = "NAME";
private static final String TAG_MOBILE = "MOBILE_NO";
private static final String TAG_NO_OF_PERSON = "NO_OF_PERSON";
private static final String TAG_DATE = "WAIT_DATE";
private static final String TAG_TIME = "WAIT_TIME";
private static final String TAG_SEATING_AREA = "SEATING_AREA";
// private static final String TAG_PREFER_AREA = "SEATING_AREA";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.waitlist_modify);
//************************************EXIT BUTTON CODE*************************
btnExit= (Button) findViewById(R.id.btnExit);
btnExit.setEnabled(true);
btnExit.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View arg0)
{
finish();
// TODO Auto-generated method stub
// System.exit(0);
//setContentView(R);
}
});
// save button
btnUpdate = (Button) findViewById(R.id.btnUpdate);
// getting product details from intent
Intent i = getIntent();
// getting product id (srno) from intent
SRNO = i.getStringExtra(TAG_SRNO);
NAME = i.getStringExtra(TAG_NAME);
MOB = i.getStringExtra(TAG_MOBILE);
NOOFPERSON = i.getStringExtra(TAG_NO_OF_PERSON);
SEATINGAREA = i.getStringExtra(TAG_SEATING_AREA);
// Getting complete product details in background thread
new GetProductDetails().execute();
// save button click event
btnUpdate.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
// starting background task to update product
new UpdateProductDetails().execute();
}
});
}
//******************************Get Single row details**************************************************
/**
* Background Async Task to Get complete product details
* */
class GetProductDetails extends AsyncTask<String, String, String>{
protected ArrayList<HashMap<String, String>> mylist;
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Waiting_ModifyActivity.this);
pDialog.setMessage("Loading List details. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Getting product details in background thread
* */
protected String doInBackground(String... params) {
// updating UI from Background Thread
runOnUiThread(new Runnable() {
private String[] srno;
public void run() {
// Check for success tag
//int success;
try {
PersonName = (EditText) findViewById(R.id.editText1);
PersonMobNo = (EditText)findViewById(R.id.editText2);
NoOfPerson = (EditText) findViewById(R.id.editText3);
SeatingArea = (EditText)findViewById(R.id.editText4);
PersonName.setText(NAME);
PersonMobNo.setText(MOB);
NoOfPerson.setText(NOOFPERSON);
SeatingArea.setText(SEATINGAREA);
}
catch (Exception e) {
e.printStackTrace();
}
}
});
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once got all details
pDialog.dismiss();
}
}
//*******************************************Update Details************************************
/**
* Background Async Task to Save product Details
* */
class UpdateProductDetails extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(Waiting_ModifyActivity.this);
pDialog.setMessage("Update Waiting List....");
pDialog.setIndeterminate(false);
pDialog.setCancelable(true);
pDialog.show();
}
/**
* Saving product
* */
protected String doInBackground(String... args) {
// getting updated data from EditTexts
String NAME= PersonName.getText().toString();
String MOBILE_NO = PersonMobNo.getText().toString();
String NO_OF_PERSON = NoOfPerson.getText().toString();
String SEATING_AREA = SeatingArea.getText().toString();
/* String name = txtName.getText().toString();
String price = txtPrice.getText().toString();
String description = txtDesc.getText().toString();
*/
// Building Parameters
List<NameValuePair> postParameters = new ArrayList<NameValuePair>();
postParameters.add(new BasicNameValuePair(TAG_SRNO,SRNO));
postParameters.add(new BasicNameValuePair(TAG_NAME,NAME));
postParameters.add(new BasicNameValuePair(TAG_MOBILE,MOBILE_NO));
postParameters.add(new BasicNameValuePair(TAG_NO_OF_PERSON,NO_OF_PERSON));
postParameters.add(new BasicNameValuePair(TAG_SEATING_AREA,SEATING_AREA));
/*postParameters.add(new BasicNameValuePair("NAME",personname));
postParameters.add(new BasicNameValuePair("MOBILE",personmobno));
postParameters.add(new BasicNameValuePair("NO_OF_PERSON",noOfperson));
postParameters.add(new BasicNameValuePair("PREFER_AREA",seatingarea));*/
/*List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair(TAG_PID, pid));
params.add(new BasicNameValuePair(TAG_NAME, name));
params.add(new BasicNameValuePair(TAG_PRICE, price));
params.add(new BasicNameValuePair(TAG_DESCRIPTION, description));*/
// sending modified data through http request
// Notice that update product url accepts POST method
JSONObject json = jsonParser.makeHttpRequest(url_Updateistview_table,"POST", postParameters);
// check json success tag
try {
int success = json.getInt(TAG_SUCCESS);
if (success == 1) {
// successfully updated1
Intent i = getIntent();
// send result code 100 to notify about product update
setResult(100, i);
finish();
} else {
// failed to update product
}
} catch (JSONException e) {
e.printStackTrace();
}
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog once product uupdated
pDialog.dismiss();
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
} // This Bracket is use for ie (extend Activity Line)
答案 0 :(得分：0)
在模型类中添加额外的布尔字段。最初是假的，当用户点击列表项时将其设置为true并调用notifydatasetchanged（）;
getView方法的另一面检查此布尔变量是否为true然后激活所有按钮，否则保持不活动状态。