问题
i want to change (with a condition) an ImageView resource in a ListView Layout from My AsyncTask that load a contacts list and put it to the listview in FindPeopleFragment.java
how can i do it ?
sorry if my english is bad !!!!
FindPeopleFragment.java:
import java.io.File;
import java.io.FileOutputStream;
import android.app.Fragment;
import android.app.ProgressDialog;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.provider.ContactsContract;
import android.support.v4.widget.SimpleCursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
public class FindPeopleFragment extends Fragment {
public FindPeopleFragment(){}
SimpleCursorAdapter mAdapter;
MatrixCursor mMatrixCursor;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_find_people, container, false);
// The contacts from the contacts content provider is stored in this cursor
mMatrixCursor = new MatrixCursor(new String[] { "_id","name","photo","details"} );
// Adapter to set data in the listview
mAdapter = new SimpleCursorAdapter(getActivity().getBaseContext(),
R.layout.lv_layout,
null,
new String[] { "name","photo","details"},
new int[] { R.id.tv_name,R.id.iv_photo,R.id.tv_details}, 0);
// Getting reference to listview
ListView lstContacts = (ListView) rootView.findViewById(R.id.listview);
// Setting the adapter to listview
lstContacts.setAdapter(mAdapter);
// Creating an AsyncTask object to retrieve and load listview with contacts
ListViewContactsLoader listViewContactsLoader = new ListViewContactsLoader();
// Starting the AsyncTask process to retrieve and load listview with contacts
listViewContactsLoader.execute();
return rootView;
}
/** An AsyncTask class to retrieve and load listview with contacts */
private class ListViewContactsLoader extends AsyncTask<Void, Void, Cursor>{
//A Progress dialog with a spinning wheel, to instruct the user about the app's current state
ProgressDialog dialog = ProgressDialog.show(getActivity(), "Please Wait", "Retrieving Contacts...", true);
@Override
protected Cursor doInBackground(Void... params) {
Uri contactsUri = ContactsContract.Contacts.CONTENT_URI;
// Querying the table ContactsContract.Contacts to retrieve all the contacts
Cursor contactsCursor = getActivity().getContentResolver().query(contactsUri, null, null, null,
ContactsContract.Contacts.DISPLAY_NAME + " ASC ");
if(contactsCursor.moveToFirst()){
do{
long contactId = contactsCursor.getLong(contactsCursor.getColumnIndex("_ID"));
Uri dataUri = ContactsContract.Data.CONTENT_URI;
// Querying the table ContactsContract.Data to retrieve individual items like
// home phone, mobile phone, work email etc corresponding to each contact
Cursor dataCursor = getActivity().getContentResolver().query(dataUri, null,
ContactsContract.Data.CONTACT_ID + "=" + contactId,
null, null);
String displayName="";
String nickName="";
String homePhone="";
String mobilePhone="";
String workPhone="";
String otherPhone="";
String photoPath="" + R.drawable.blank;
byte[] photoByte=null;
String homeEmail="";
String workEmail="";
String companyName="";
String title="";
if(dataCursor.moveToFirst()){
// Getting Display Name
displayName = dataCursor.getString(dataCursor.getColumnIndex(ContactsContract.Data.DISPLAY_NAME ));
do{
// Getting NickName
if(dataCursor.getString(dataCursor.getColumnIndex("mimetype")).equals(ContactsContract.CommonDataKinds.Nickname.CONTENT_ITEM_TYPE))
nickName = dataCursor.getString(dataCursor.getColumnIndex("data1"));
// Getting Phone numbers
if(dataCursor.getString(dataCursor.getColumnIndex("mimetype")).equals(ContactsContract.CommonDataKinds.Phone.CONTENT_ITEM_TYPE)){
switch(dataCursor.getInt(dataCursor.getColumnIndex("data2"))){
case ContactsContract.CommonDataKinds.Phone.TYPE_HOME :
homePhone = dataCursor.getString(dataCursor.getColumnIndex("data1"));
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_MOBILE :
mobilePhone = dataCursor.getString(dataCursor.getColumnIndex("data1"));
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_WORK :
workPhone = dataCursor.getString(dataCursor.getColumnIndex("data1"));
break;
case ContactsContract.CommonDataKinds.Phone.TYPE_OTHER :
otherPhone = dataCursor.getString(dataCursor.getColumnIndex("data1"));
break;
}
}
// Getting EMails
if(dataCursor.getString(dataCursor.getColumnIndex("mimetype")).equals(ContactsContract.CommonDataKinds.Email.CONTENT_ITEM_TYPE ) ) {
switch(dataCursor.getInt(dataCursor.getColumnIndex("data2"))){
case ContactsContract.CommonDataKinds.Email.TYPE_HOME :
homeEmail = dataCursor.getString(dataCursor.getColumnIndex("data1"));
break;
case ContactsContract.CommonDataKinds.Email.TYPE_WORK :
workEmail = dataCursor.getString(dataCursor.getColumnIndex("data1"));
break;
}
}
// Getting Organization details
if(dataCursor.getString(dataCursor.getColumnIndex("mimetype")).equals(ContactsContract.CommonDataKinds.Organization.CONTENT_ITEM_TYPE)){
companyName = dataCursor.getString(dataCursor.getColumnIndex("data1"));
title = dataCursor.getString(dataCursor.getColumnIndex("data4"));
}
// Getting Photo
if(dataCursor.getString(dataCursor.getColumnIndex("mimetype")).equals(ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE)){
photoByte = dataCursor.getBlob(dataCursor.getColumnIndex("data15"));
if(photoByte != null) {
Bitmap bitmap = BitmapFactory.decodeByteArray(photoByte, 0, photoByte.length);
// Getting Caching directory
File cacheDirectory = getActivity().getBaseContext().getCacheDir();
// Temporary file to store the contact image
File tmpFile = new File(cacheDirectory.getPath() + "/wpta_"+contactId+".png");
// The FileOutputStream to the temporary file
try {
FileOutputStream fOutStream = new FileOutputStream(tmpFile);
// Writing the bitmap to the temporary file as png file
bitmap.compress(Bitmap.CompressFormat.PNG,100, fOutStream);
// Flush the FileOutputStream
fOutStream.flush();
//Close the FileOutputStream
fOutStream.close();
} catch (Exception e) {
e.printStackTrace();
}
photoPath = tmpFile.getPath();
}
}
}while(dataCursor.moveToNext());
String details = "";
// Concatenating various information to single string
if(homePhone != null && !homePhone.equals("") )
details = "HomePhone : " + homePhone + "\n";
if(mobilePhone != null && !mobilePhone.equals("") )
details += "MobilePhone : " + mobilePhone + "\n";
if(workPhone != null && !workPhone.equals("") )
details += "WorkPhone : " + workPhone + "\n";
if(otherPhone != null && !otherPhone.equals("") )
details += "OtherPhone : " + otherPhone + "\n";
if(nickName != null && !nickName.equals("") )
details += "NickName : " + nickName + "\n";
if(homeEmail != null && !homeEmail.equals("") )
details += "HomeEmail : " + homeEmail + "\n";
if(workEmail != null && !workEmail.equals("") )
details += "WorkEmail : " + workEmail + "\n";
if(companyName != null && !companyName.equals("") )
details += "CompanyName : " + companyName + "\n";
if(title != null && !title.equals("") )
details += "Title : " + title + "\n";
// Adding id, display name, path to photo and other details to cursor
mMatrixCursor.addRow(new Object[]{ Long.toString(contactId),displayName,photoPath,details});
}
}while(contactsCursor.moveToNext());
}
return mMatrixCursor;
}
@Override
protected void onPostExecute(Cursor result) {
// Setting the cursor containing contacts to listview
mAdapter.swapCursor(result);
dialog.dismiss();
}
}
}
lv_layout.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="horizontal" >
<ImageView
android:id="@+id/iv_puce"
android:layout_height="60dp"
android:layout_width="60dp"
android:padding="10dp"
android:src="@drawable/none"
/>
<ImageView
android:id="@+id/iv_photo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="10dp" />
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical" >
<TextView
android:id="@+id/tv_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="4dp"
android:textSize="15sp" />
<TextView
android:id="@+id/tv_details"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="4dp"
android:textSize="12sp" />
</LinearLayout>
</LinearLayout>
the condition i want to do is related to the phone number from each contact in the listview it consiste to get the provider number and compare it with (getProvider()) and tell which is the provider of the number and put his puce image (from drawable) in the ImageView (iv_puce)
getProvider():
String[] prefix = new String[]{"0610","0611","0613","0615","0616","0618","0622","0623",
"0624","0628","0641","0642","0648","0650","0651","0652",
"0653","0654","0655","0658","0659","0661","0662","0666",
"0667","0668","0670","0671","0672","0673","0676","0677",
"0678"," ","0612","0614","0617","0619","0620","0644","0645",
"0649","0656","0657","0660","0663","0664","0665","0669","0674"
,"0675","0679"," ","0600","0601","0602","0603","0606","0626",
"0627","0629","0630","0633","0634","0635","0638","0699"," ",
"0640","0646","0647"," ","0526","0527","0540","0546","0547",
"0533","0534","0550","0553"};
String[] provider = new String[]{"iam","meditel","inwi","modem_inwi","bayn"};
public String getProvider(String num){
//0642212125
//+212642848
String ns;
String msg = "";
if(num.indexOf("+") != -1){
ns = "0" +num.substring(4, 7);
}else{
ns = num.substring(0,4);
}
int j = 0;
boolean found = false;
for (int i = 0; i < prefix.length-1; i++) {
if(prefix[i].equals(ns) & found == false){
msg = provider[j] ;
found = true;
if (msg == "inwi"){
ImageView Imgview = (ImageView) findViewById(R.id.imgViewOperator2);
Imgview.setImageResource(R.drawable.inwi);
}
else if (msg == "meditel"){
ImageView Imgview = (ImageView) findViewById(R.id.imgViewOperator2);
Imgview.setImageResource(R.drawable.meditel);
}
else if (msg == "bayn"){
ImageView Imgview = (ImageView) findViewById(R.id.imgViewOperator2);
Imgview.setImageResource(R.drawable.bayn);
}
else if (msg == "iam"){
ImageView Imgview = (ImageView) findViewById(R.id.imgViewOperator2);
Imgview.setImageResource(R.drawable.iam);
}
else if (msg == "modem_inwi"){
ImageView Imgview = (ImageView) findViewById(R.id.imgViewOperator2);
Imgview.setImageResource(R.drawable.modem_inwi);
}
else{
ImageView Imgview = (ImageView) findViewById(R.id.imgViewOperator2);
Imgview.setImageResource(R.drawable.none);
}
//document.getElementById("src_img").innerHTML = "<img src='images/puces/" + provider[j] + ".png' alt='' />";
// break;
}
else if(prefix[i] == " " & found == false){
j += 1;
// msg = j + " " + ns + " " + provider[j];
}
else if(i == prefix.length & found == false){
msg = "";
//document.getElementById("src_img").innerHTML = "<img src='images/puces/none.png' alt='' />";
}
};
return msg;
}
回答1:
You need to let the ListView know that your adapter's data has changed. Do the below in your onPostExecute method.
@Override
protected void onPostExecute(Cursor result) {
// Setting the cursor containing contacts to listview
mAdapter.swapCursor(result);
// Add this line
mAdapter.notifyDataSetChanged();
dialog.dismiss();
}
Good luck.
来源：https://stackoverflow.com/questions/23638470/change-imageview-resource-in-a-listview-layout-from-an-asynctask-that-load-conta