Thanks Justin, I'll give that a go.
graham On Tue, Apr 3, 2012 at 9:56 PM, Justin Anderson <[email protected]>wrote: > When you need to update the adapter, iterate over your hash map and insert > all the data into a list. Maybe do something like this: > > 1) Create a DataPairs class: > > public class DataPairs > { > public String _key; > public String _value; > > public DataPairs(String key, String val) > { > _key = key; > _value = val; > } > } > > 2) Create a new list of DataPairs objects, iterate over your hash map, and > insert the data into your list > 3) Update your adapter with the new list of data and call > notifyDataSetChanged() > > > Thanks, > Justin Anderson > MagouyaWare Developer > http://sites.google.com/site/magouyaware > > > On Tue, Apr 3, 2012 at 1:46 PM, Graham Bright <[email protected]>wrote: > >> Thanks Justin, >> >> Order is not important, as my end goal is to present to the user a simple >> list of values + keys. When the user longclicks on an item it will be >> deleted from the hash. >> >> What would you suggest? >> >> graham >> >> >> >> >> On Tue, Apr 3, 2012 at 9:24 PM, Justin Anderson <[email protected]>wrote: >> >>> Keep in mind that HashMap does not have an order... ArrayAdapter does >>> everything based on a position value, which indicates an ordered collection >>> of some sort. >>> >>> Thanks, >>> Justin Anderson >>> MagouyaWare Developer >>> http://sites.google.com/site/magouyaware >>> >>> >>> On Tue, Apr 3, 2012 at 1:16 PM, Graham Bright >>> <[email protected]>wrote: >>> >>>> Hi, >>>> >>>> I have a hashmap with key, value pairs example :- >>>> >>>> (msisdn,value) >>>> >>>> 43664xxxxxxx,2 >>>> 43665xxxxxxx,3 >>>> >>>> now I want to display this information in a ListView but I don't know >>>> how to feed the data to an ArrayAdapter. >>>> >>>> HERE IS MY ADAPTER, note I want to replace myList with data from the >>>> Hashmap a concatentated key+value. >>>> >>>> 1. Pass the above hashmap as an adapter, replacing myList with the >>>> hashmap >>>> >>>> adapter=new >>>> ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,myList); >>>> setListAdapter(adapter); >>>> >>>> Note this is what I have without using the hashmap >>>> >>>> THANKS IN ADVANCE >>>> >>>> >>>> package listmodified.org; >>>> >>>> import java.util.Arrays; >>>> import java.util.ArrayList; >>>> import java.util.HashMap; >>>> import java.util.List; >>>> import java.util.Map; >>>> >>>> import android.app.ListActivity; >>>> import android.os.Bundle; >>>> import android.os.Handler; >>>> import android.os.Message; >>>> import android.view.View; >>>> import android.widget.AdapterView; >>>> import android.widget.ArrayAdapter; >>>> import android.widget.ListView; >>>> import android.widget.TextView; >>>> import android.widget.AdapterView.OnItemLongClickListener; >>>> import android.view.GestureDetector.OnGestureListener; >>>> import android.view.GestureDetector; >>>> import android.view.MotionEvent; >>>> import android.widget.Toast; >>>> >>>> >>>> >>>> >>>> public class listmodified extends ListActivity implements >>>> OnGestureListener { >>>> public ArrayList<String> myList = new >>>> ArrayList<String>(Arrays.asList(items)); >>>> private TextView selection; // MAIN.xml >>>> public ArrayAdapter<String> adapter; // my adapter >>>> public OnItemLongClickListener itemDelListener; >>>> private GestureDetector gestureScanner; >>>> public int longClickedItem = 0; //check if longClick is >>>> selected or >>>> not >>>> private String itemSelected; // for delete function >>>> private static final byte UPDATE_LIST = 100; >>>> public AdapterView<?> parent; //used by OnLitemLongClickListener >>>> public int position; >>>> >>>> //tie items to an array list called myList >>>> public static String[] items={"lorem", "ipsum", "dolor", >>>> "sit", "amet", >>>> "consectetuer", "adipiscing", "elit", "morbi", "vel", >>>> "ligula", "vitae", "arcu", "aliquet", "mollis", >>>> "etiam", "vel", "erat", "placerat", "ante", >>>> "porttitor", "sodales", "pellentesque", "augue", "purus"}; >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> >>>> @Override >>>> public void onCreate(Bundle icicle) { >>>> super.onCreate(icicle); >>>> >>>> OnItemLongClickListener itemDelListener = new >>>> OnItemLongClickListener(){ >>>> >>>> //@Override >>>> public boolean onItemLongClick(AdapterView<?> parent, >>>> View arg1, >>>> int position, long arg3) { >>>> // TODO Auto-generated method stub >>>> >>>> itemSelected=parent.getItemAtPosition(position).toString(); >>>> adapter.remove(itemSelected); >>>> Toast.makeText(listmodified.this, "position is:" >>>> + position, >>>> Toast.LENGTH_SHORT).show(); >>>> myList.remove(this); //remove the current >>>> object , position throws >>>> an exception >>>> adapter.notifyDataSetChanged(); >>>> >>>> >>>> return false; >>>> }}; >>>> >>>> setContentView(R.layout.main); >>>> >>>> >>>> //DEFINE MY OWN VIEW TIE TO ARRAYLIST myList WHICH CONTAINS >>>> STRINGS >>>> adapter=new >>>> ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,myList); >>>> setListAdapter(adapter); >>>> >>>> //A VIEW OF THE LIST NECESSARY FOR DELETION >>>> >>>> selection=(TextView)findViewById(R.id.selection); >>>> >>>> >>>> // PART OF LONG CLICK SELECTED CODE >>>> // CALLS IMPLEMENTED METHODS - detect gestures checking my list >>>> items >>>> gestureScanner = new GestureDetector(this); >>>> getListView().setOnTouchListener(new View.OnTouchListener() { >>>> @Override >>>> public boolean onTouch(View v, MotionEvent event) { >>>> return gestureScanner.onTouchEvent(event); >>>> } >>>> }); >>>> >>>> //UPDATE VIEW DELETE WHEN ONLONG CLICK IS PRESSED >>>> getListView().setOnItemLongClickListener(itemDelListener); >>>> >>>> } >>>> >>>> >>>> //LIST ITEM PRESS CHECKING >>>> public void onListItemClick(ListView parent, View v, >>>> int position, long id){ >>>> selection.setText(myList.get(position)); >>>> //check to see if LONGCLICK IS PRESSED >>>> if (longClickedItem != -1) { >>>> Toast.makeText(listmodified.this, "A short click >>>> detected", >>>> Toast.LENGTH_SHORT).show(); >>>> >>>> } >>>> longClickedItem=0; >>>> } >>>> >>>> //IMPLEMENTED BY GESTURE >>>> @Override >>>> public boolean onDown(MotionEvent arg0) { >>>> // TODO Auto-generated method stub >>>> return false; >>>> } >>>> >>>> >>>> @Override >>>> public boolean onFling(MotionEvent e1, MotionEvent e2, float >>>> velocityX, >>>> float velocityY) { >>>> // TODO Auto-generated method stub >>>> return false; >>>> } >>>> >>>> >>>> //CHECKS ONLONGPRESS EVENTS SET LONG PRESS TO -1, >>>> //COOL I CAN USE THIS TO SEE IF A LONG CLICK WAS SELECTED LATER ON >>>> >>>> @Override >>>> public void onLongPress(MotionEvent e) { >>>> // TODO Auto-generated method stub >>>> Toast.makeText(listmodified.this, "A long click >>>> detected", >>>> Toast.LENGTH_SHORT).show(); >>>> >>>> >>>> if (e.getAction()==MotionEvent.ACTION_DOWN) >>>> { >>>> >>>> longClickedItem = -1; >>>> >>>> } >>>> >>>> } >>>> >>>> >>>> @Override >>>> public boolean onScroll(MotionEvent e1, MotionEvent e2, float >>>> distanceX, >>>> float distanceY) { >>>> // TODO Auto-generated method stub >>>> return false; >>>> } >>>> >>>> >>>> @Override >>>> public void onShowPress(MotionEvent e) { >>>> // TODO Auto-generated method stub >>>> >>>> } >>>> >>>> >>>> @Override >>>> public boolean onSingleTapUp(MotionEvent e) { >>>> // TODO Auto-generated method stub >>>> return false; >>>> } >>>> private Handler updateListHandler = new Handler() { >>>> @Override >>>> public void handleMessage(Message msg) { >>>> switch (msg.what) { >>>> case UPDATE_LIST: >>>> int position = msg.arg1; >>>> myList.remove(position); >>>> adapter.notifyDataSetChanged(); >>>> Toast.makeText(listmodified.this, "OnSingleTapUp", >>>> Toast.LENGTH_SHORT).show(); >>>> break; >>>> >>>> } >>>> ; >>>> }; >>>> }; >>>> >>>> >>>> } >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Android Developers" group. >>>> To post to this group, send email to >>>> [email protected] >>>> To unsubscribe from this group, send email to >>>> [email protected] >>>> For more options, visit this group at >>>> http://groups.google.com/group/android-developers?hl=en >>> >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "Android Developers" group. >>> To post to this group, send email to [email protected] >>> To unsubscribe from this group, send email to >>> [email protected] >>> For more options, visit this group at >>> http://groups.google.com/group/android-developers?hl=en >> >> >> -- >> You received this message because you are subscribed to the Google >> Groups "Android Developers" group. >> To post to this group, send email to [email protected] >> To unsubscribe from this group, send email to >> [email protected] >> For more options, visit this group at >> http://groups.google.com/group/android-developers?hl=en >> > > -- > You received this message because you are subscribed to the Google > Groups "Android Developers" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/android-developers?hl=en > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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