Android Listview 项目重复添加具有不同数据的新项目
Android Listview Item is Repeating on adding new item with different data
我正在尝试处理其中的列表activity，我正在向列表视图行添加项目。但是当我加载不同的数据以在列表视图中添加一个项目时，它会重复之前添加的相同项目。
这是我的基本适配器 class:
public class MyNotiAdapter extends BaseAdapter {
Context context;
String[] data;
String time;
String Name ;
String Number;
private static LayoutInflater inflater = null;
public MyNotiAdapter(Context context, String[] data,String time, String Name ,String Number) {
// TODO Auto-generated constructor stub
this.context = context;
this.data = data;
this.time = time;
this.Name = Name;
this.Number=Number;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return data.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return data[position];
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder mHolder;
View vi = convertView;
if (vi == null){
vi = inflater.inflate(R.layout.row2, null);
mHolder = new ViewHolder();
mHolder.text= (TextView) vi.findViewById(R.id.lablel);
mHolder.Nameo = (TextView) vi.findViewById(R.id.person);
mHolder.Numbero = (TextView) vi.findViewById(R.id.edu);
mHolder.Time = (TextView) vi.findViewById(R.id.tym);
vi.setTag(mHolder);
mHolder.text.setText(data[position]);
mHolder.Nameo.setText(Name);
mHolder.Numbero.setText(Number);
mHolder.Time.setText(time);
}else {
mHolder = (ViewHolder) convertView.getTag();
}
return vi;
}
public class ViewHolder {
public TextView text;
public TextView Nameo;
public TextView Numbero;
public TextView Time;
}
}
这是我正在设置适配器数据的 activity...
public class noticall extends ListActivity {
CustomDateTimePicker custom;
TextView tv,tv1;
EditText ed;
String store;
static String Names;
public static final int PICK_CONTACT = 1;
String [] adi ;
static int incre=0;
ArrayList<String> myrows = new ArrayList<String>();
private PendingIntent pendingIntent;
ListView listview;
String temp1 ,temp2 ;
int x=0;
OnItemClickListener listener;
String Date,Time,Name,Number;
MyNotiAdapter adp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.notify);
listview = (ListView) findViewById(android.R.id.list);
listview.setDividerHeight(5);
custom = new CustomDateTimePicker(noticall.this,new CustomDateTimePicker.ICustomDateTimeListener() {
@Override
public void onCancel() {
finish();
}
@Override
public void onSet(Dialog dialog, Calendar calendarSelected,Date dateSelected, int year, String monthFullName,
String monthShortName, int monthNumber, int date,
String weekDayFullName, String weekDayShortName,
int hour24, int hour12, int min, int sec,
String AM_PM) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, monthNumber, date, hour24, min, 0);
long when = calendar.getTimeInMillis(); // notification time
Intent myIntent = new Intent(noticall.this, MyReceiver.class);
pendingIntent = PendingIntent.getBroadcast(noticall.this, 0, myIntent,0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
//temp1= store =calendarSelected.get(Calendar.DAY_OF_MONTH) + "/" + (monthNumber+1) + "/" +
// year + ", " + hour12 + ":" + min + " " + AM_PM;
Date = calendarSelected.get(Calendar.DAY_OF_MONTH) + "/" + (monthNumber+1) + "/" +year;
Time = hour12 + ":" + min + " " + AM_PM;
Log.e("Timeee", Time+"");
setlisto(Date);
Toast.makeText(noticall.this, store, Toast.LENGTH_SHORT).show();
}
});
/*
Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(intent,PICK_CONTACT);
/**
* Pass Directly current time format it will return AM and PM if you set
* false
*/
custom.set24HourFormat(false);
/**
* Pass Directly current data and time to show when it pop up
*/
custom.setDate(Calendar.getInstance());
//custom.showDialog();
findViewById(R.id.button_date).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(intent,PICK_CONTACT);
custom.showDialog();
incre++;
}
});
// ((BaseAdapter) listview.getAdapter()).notifyDataSetChanged() ;
// listview.getAdapter().notifyAll();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if(resultCode != RESULT_CANCELED){
if (requestCode == 1)
{
// Get the URI that points to the selected contact
Uri contactUri = data.getData();
// We only need the NUMBER column, because there will be only one row in the result
String[] projection = {ContactsContract.CommonDataKinds.Phone.NUMBER, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME, ContactsContract.CommonDataKinds.Phone.CONTACT_ID};
String[] segments = contactUri.toString().split("/");
String id = segments[segments.length - 1];
// Perform the query on the contact to get the NUMBER column
// We don't need a selection or sort order (there's only one result for the given URI)
// CAUTION: The query() method should be called from a separate thread to avoid blocking
// your app's UI thread. (For simplicity of the sample, this code doesn't do that.)
// Consider using CursorLoader to perform the query.
Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, projection, null, null, null);
cursor.moveToFirst();
while (!cursor.isAfterLast())
{
int cid = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID);
String contactid = cursor.getString(cid);
if (contactid.equals(id))
{
// Retrieve the phone number from the NUMBER column
int column = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
String number = cursor.getString(column);
// Retrieve the contact name from the DISPLAY_NAME column
int column_name = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
String name = cursor.getString(column_name);
// Do something with the phone number...
// Toast.makeText(this, "I added the Contact: \n" + name + " " + number, Toast.LENGTH_SHORT).show();
// ed.setText(name+" - "+number);
Name= Names=name;
Number =number;
}
cursor.moveToNext();
}
cursor.close();
}
}
}
public void setlisto(String one ){
Log.e("setlistoo",one+"");
myrows.add(one);
adi = myrows.toArray(new String[myrows.size()]);
listview.setAdapter(new MyNotiAdapter(noticall.this, adi,Time,Name,Number));
// ((BaseAdapter) listview.getAdapter()).notifyDataSetChanged();
//listview.invalidateViews();
x++;
}
}
我已经了解了互联网上提供的所有解决方案。我想我在某个地方犯了一些错误。如果有人能找到问题所在...?
我注意到只有 Data[] 数组正在更新为不同的值。但是其他字符串变量覆盖了我添加的每个项目。为什么会这样？
我认为您需要调用 notifyDataSetChanged 方法，并在动态添加数据之前调用 setAdapter。
或者你可以完成这个 link http://androidadapternotifiydatasetchanged.blogspot.in/
好的，我自己解决了。问题是我正在传递简单的字符串，但我必须传递字符串数组才能将新数据添加到列表视图。
这是我所做的更改..
在activity中：
public void setlisto(String one ){
Log.e("setlistoo",one+"");
myrows.add(one);
time1.add(Time);
name1.add(Name);
number1.add(Number);
adi = myrows.toArray(new String[myrows.size()]);
adi1=time1.toArray(new String[time1.size()]);
adi2=name1.toArray(new String[name1.size()]);
adi3=number1.toArray(new String[number1.size()]);
listview.setAdapter(new MyNotiAdapter(noticall.this, adi,adi1,adi2,adi3));
// if(adi!=null)
//adp.notifyDataSetChanged();
x++;
}
在基础适配器中 class :
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder mHolder;
View vi = convertView;
if (vi == null){
vi = inflater.inflate(R.layout.row2, null);
mHolder = new ViewHolder();
mHolder.text= (TextView) vi.findViewById(R.id.lablel);
mHolder.Nameo = (TextView) vi.findViewById(R.id.person);
mHolder.Numbero = (TextView) vi.findViewById(R.id.edu);
mHolder.Time = (TextView) vi.findViewById(R.id.tym);
vi.setTag(mHolder);
mHolder.text.setText(data[position]);
mHolder.Nameo.setText(Name[position]);
mHolder.Numbero.setText(Number[position]);
mHolder.Time.setText(time[position]);
}else {
mHolder = (ViewHolder) convertView.getTag();
}
return vi;
}
现在一切顺利......它的工作完美。它可能会帮助像我这样的人。干杯..
您的代码似乎需要重构很多。
好的，首先，创建一个模型对象 class，假设 MyReminderObject.java :
public class MyReminderObject {
public String date;
public String time;
public String name;
public String number;
}
在您的适配器中：
添加 MyReminderObject 列表。
private List<MyReminderObject> mList;
添加一个新的构造函数：
public MyNotiAdapter(Context context) {
mList = new ArrayList<MyReminderObject>();
inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
改变一些方法：
@Override
public int getCount() {
return mList.size();
}
@Override
public Object getItem(int position) {
return mList.get(position);
}
在您的 getView 方法中，更改一些代码：
MyReminderObject item = mList.get(position);
mHolder.text.setText(item.date);
mHolder.Nameo.setText(item.name);
mHolder.Numbero.setText(item.number);
mHolder.Time.setText(item.time);
还是在你的adapter中，添加一个添加item的函数:
public void addReminder(MyReminderObject item){
mList.add(item);
notifyDataSetChanged();
}
在你的 Activity :
在你的 onCreate() 中：
listview.setDividerHeight(5);
adp = new MyNotiAdapter(noticall.this);
listview.setAdapter(adp);
最后，关于您的 setListTo() 方法：
public void setlisto(String one ){
Log.e("setlistoo",one+"");
MyReminderObject newItem = new MyReminderObject();
newItem.date = one;
newItem.time = Time;
newItem.name = Name;
newItem.number = Number;
adp.addReminder(newItem);
x++;
}
我正在尝试处理其中的列表activity，我正在向列表视图行添加项目。但是当我加载不同的数据以在列表视图中添加一个项目时，它会重复之前添加的相同项目。
这是我的基本适配器 class:
public class MyNotiAdapter extends BaseAdapter {
Context context;
String[] data;
String time;
String Name ;
String Number;
private static LayoutInflater inflater = null;
public MyNotiAdapter(Context context, String[] data,String time, String Name ,String Number) {
// TODO Auto-generated constructor stub
this.context = context;
this.data = data;
this.time = time;
this.Name = Name;
this.Number=Number;
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return data.length;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return data[position];
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public int getViewTypeCount() {
return getCount();
}
@Override
public int getItemViewType(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder mHolder;
View vi = convertView;
if (vi == null){
vi = inflater.inflate(R.layout.row2, null);
mHolder = new ViewHolder();
mHolder.text= (TextView) vi.findViewById(R.id.lablel);
mHolder.Nameo = (TextView) vi.findViewById(R.id.person);
mHolder.Numbero = (TextView) vi.findViewById(R.id.edu);
mHolder.Time = (TextView) vi.findViewById(R.id.tym);
vi.setTag(mHolder);
mHolder.text.setText(data[position]);
mHolder.Nameo.setText(Name);
mHolder.Numbero.setText(Number);
mHolder.Time.setText(time);
}else {
mHolder = (ViewHolder) convertView.getTag();
}
return vi;
}
public class ViewHolder {
public TextView text;
public TextView Nameo;
public TextView Numbero;
public TextView Time;
}
}
这是我正在设置适配器数据的 activity...
public class noticall extends ListActivity {
CustomDateTimePicker custom;
TextView tv,tv1;
EditText ed;
String store;
static String Names;
public static final int PICK_CONTACT = 1;
String [] adi ;
static int incre=0;
ArrayList<String> myrows = new ArrayList<String>();
private PendingIntent pendingIntent;
ListView listview;
String temp1 ,temp2 ;
int x=0;
OnItemClickListener listener;
String Date,Time,Name,Number;
MyNotiAdapter adp;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.notify);
listview = (ListView) findViewById(android.R.id.list);
listview.setDividerHeight(5);
custom = new CustomDateTimePicker(noticall.this,new CustomDateTimePicker.ICustomDateTimeListener() {
@Override
public void onCancel() {
finish();
}
@Override
public void onSet(Dialog dialog, Calendar calendarSelected,Date dateSelected, int year, String monthFullName,
String monthShortName, int monthNumber, int date,
String weekDayFullName, String weekDayShortName,
int hour24, int hour12, int min, int sec,
String AM_PM) {
Calendar calendar = Calendar.getInstance();
calendar.set(year, monthNumber, date, hour24, min, 0);
long when = calendar.getTimeInMillis(); // notification time
Intent myIntent = new Intent(noticall.this, MyReceiver.class);
pendingIntent = PendingIntent.getBroadcast(noticall.this, 0, myIntent,0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC, calendar.getTimeInMillis(), pendingIntent);
//temp1= store =calendarSelected.get(Calendar.DAY_OF_MONTH) + "/" + (monthNumber+1) + "/" +
// year + ", " + hour12 + ":" + min + " " + AM_PM;
Date = calendarSelected.get(Calendar.DAY_OF_MONTH) + "/" + (monthNumber+1) + "/" +year;
Time = hour12 + ":" + min + " " + AM_PM;
Log.e("Timeee", Time+"");
setlisto(Date);
Toast.makeText(noticall.this, store, Toast.LENGTH_SHORT).show();
}
});
/*
Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(intent,PICK_CONTACT);
/**
* Pass Directly current time format it will return AM and PM if you set
* false
*/
custom.set24HourFormat(false);
/**
* Pass Directly current data and time to show when it pop up
*/
custom.setDate(Calendar.getInstance());
//custom.showDialog();
findViewById(R.id.button_date).setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent(Intent.ACTION_PICK, ContactsContract.Contacts.CONTENT_URI);
startActivityForResult(intent,PICK_CONTACT);
custom.showDialog();
incre++;
}
});
// ((BaseAdapter) listview.getAdapter()).notifyDataSetChanged() ;
// listview.getAdapter().notifyAll();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
super.onActivityResult(requestCode, resultCode, data);
if(resultCode != RESULT_CANCELED){
if (requestCode == 1)
{
// Get the URI that points to the selected contact
Uri contactUri = data.getData();
// We only need the NUMBER column, because there will be only one row in the result
String[] projection = {ContactsContract.CommonDataKinds.Phone.NUMBER, ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME, ContactsContract.CommonDataKinds.Phone.CONTACT_ID};
String[] segments = contactUri.toString().split("/");
String id = segments[segments.length - 1];
// Perform the query on the contact to get the NUMBER column
// We don't need a selection or sort order (there's only one result for the given URI)
// CAUTION: The query() method should be called from a separate thread to avoid blocking
// your app's UI thread. (For simplicity of the sample, this code doesn't do that.)
// Consider using CursorLoader to perform the query.
Cursor cursor = getContentResolver().query(ContactsContract.CommonDataKinds.Phone.CONTENT_URI, projection, null, null, null);
cursor.moveToFirst();
while (!cursor.isAfterLast())
{
int cid = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.CONTACT_ID);
String contactid = cursor.getString(cid);
if (contactid.equals(id))
{
// Retrieve the phone number from the NUMBER column
int column = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER);
String number = cursor.getString(column);
// Retrieve the contact name from the DISPLAY_NAME column
int column_name = cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME);
String name = cursor.getString(column_name);
// Do something with the phone number...
// Toast.makeText(this, "I added the Contact: \n" + name + " " + number, Toast.LENGTH_SHORT).show();
// ed.setText(name+" - "+number);
Name= Names=name;
Number =number;
}
cursor.moveToNext();
}
cursor.close();
}
}
}
public void setlisto(String one ){
Log.e("setlistoo",one+"");
myrows.add(one);
adi = myrows.toArray(new String[myrows.size()]);
listview.setAdapter(new MyNotiAdapter(noticall.this, adi,Time,Name,Number));
// ((BaseAdapter) listview.getAdapter()).notifyDataSetChanged();
//listview.invalidateViews();
x++;
}
}
我已经了解了互联网上提供的所有解决方案。我想我在某个地方犯了一些错误。如果有人能找到问题所在...?
我注意到只有 Data[] 数组正在更新为不同的值。但是其他字符串变量覆盖了我添加的每个项目。为什么会这样？
我认为您需要调用 notifyDataSetChanged 方法，并在动态添加数据之前调用 setAdapter。
或者你可以完成这个 link http://androidadapternotifiydatasetchanged.blogspot.in/
好的，我自己解决了。问题是我正在传递简单的字符串，但我必须传递字符串数组才能将新数据添加到列表视图。
这是我所做的更改..
在activity中：
public void setlisto(String one ){
Log.e("setlistoo",one+"");
myrows.add(one);
time1.add(Time);
name1.add(Name);
number1.add(Number);
adi = myrows.toArray(new String[myrows.size()]);
adi1=time1.toArray(new String[time1.size()]);
adi2=name1.toArray(new String[name1.size()]);
adi3=number1.toArray(new String[number1.size()]);
listview.setAdapter(new MyNotiAdapter(noticall.this, adi,adi1,adi2,adi3));
// if(adi!=null)
//adp.notifyDataSetChanged();
x++;
}
在基础适配器中 class :
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder mHolder;
View vi = convertView;
if (vi == null){
vi = inflater.inflate(R.layout.row2, null);
mHolder = new ViewHolder();
mHolder.text= (TextView) vi.findViewById(R.id.lablel);
mHolder.Nameo = (TextView) vi.findViewById(R.id.person);
mHolder.Numbero = (TextView) vi.findViewById(R.id.edu);
mHolder.Time = (TextView) vi.findViewById(R.id.tym);
vi.setTag(mHolder);
mHolder.text.setText(data[position]);
mHolder.Nameo.setText(Name[position]);
mHolder.Numbero.setText(Number[position]);
mHolder.Time.setText(time[position]);
}else {
mHolder = (ViewHolder) convertView.getTag();
}
return vi;
}
现在一切顺利......它的工作完美。它可能会帮助像我这样的人。干杯..
您的代码似乎需要重构很多。
好的，首先，创建一个模型对象 class，假设 MyReminderObject.java :
public class MyReminderObject { public String date; public String time; public String name; public String number; }在您的适配器中：
添加 MyReminderObject 列表。
private List<MyReminderObject> mList;添加一个新的构造函数：
public MyNotiAdapter(Context context) { mList = new ArrayList<MyReminderObject>(); inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); }改变一些方法：
@Override public int getCount() { return mList.size(); } @Override public Object getItem(int position) { return mList.get(position); }在您的 getView 方法中，更改一些代码：
MyReminderObject item = mList.get(position); mHolder.text.setText(item.date); mHolder.Nameo.setText(item.name); mHolder.Numbero.setText(item.number); mHolder.Time.setText(item.time);还是在你的adapter中，添加一个添加item的函数:
public void addReminder(MyReminderObject item){ mList.add(item); notifyDataSetChanged(); }在你的 Activity :
在你的 onCreate() 中：
listview.setDividerHeight(5); adp = new MyNotiAdapter(noticall.this); listview.setAdapter(adp);最后，关于您的 setListTo() 方法：
public void setlisto(String one ){ Log.e("setlistoo",one+""); MyReminderObject newItem = new MyReminderObject(); newItem.date = one; newItem.time = Time; newItem.name = Name; newItem.number = Number; adp.addReminder(newItem); x++; }