我想从My AsyncTask更改（带条件）ListView布局中的ImageView资源，加载联系人列表并将其放入FindPeopleFragment.java中的listview
我该怎么做？
对不起，如果我的英语不好!!!!
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>
我想要做的条件与列表视图中每个联系人的电话号码相关 它确定获取提供者编号并将其与（getProvider（））进行比较，并告诉它是该编号的提供者 并将他的puce图像（来自drawable）放入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;
}
答案 0 :(得分：0)
您需要让ListView知道您的适配器数据已更改。在onPostExecute方法中执行以下操作。
@Override
protected void onPostExecute(Cursor result) {
// Setting the cursor containing contacts to listview
mAdapter.swapCursor(result);
// Add this line
mAdapter.notifyDataSetChanged();
dialog.dismiss();
}