我想在我的应用程序的列表视图中添加所选联系人。我使用以下代码获取选定的代码，但它没有显示列表视图中的选定联系人。请帮助我解决我做错了什么和哪里
public class Contacts extends Activity implements View.OnClickListener {
private Button AddNewContact;
private Button AddFrmContacts;
private ListView EmergencyContactList;
private final int PICK = 1001;
private final int NEW = 1002;
ArrayList<ContactDetails> ContactList = new ArrayList<ContactDetails>();
ContactDetails CD = new ContactDetails(null, null);
ContactsAdapter contactsAdapter = null;
String[] ContactsArray = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.add_contacts);
EmergencyContactList = (ListView) findViewById(R.id.emergency_contact_list);
ContactsArray = new String[ContactList.size()];
contactsAdapter = new ContactsAdapter(Contacts.this, R.layout.contacts_listitem,ContactsArray);
EmergencyContactList.setAdapter(contactsAdapter);
AddNewContact = (Button) findViewById(R.id.add_new);
AddFrmContacts = (Button) findViewById(R.id.from_contacts);
EmergencyContactList.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// TODO Auto-generated method stub
Log.v("Item position :",
EmergencyContactList.getSelectedItemPosition() + "");
}
});
AddFrmContacts.setOnClickListener(this);
AddNewContact.setOnClickListener(this);
}
@Override
public void onResume() {
super.onResume();
Log.v("contactlist on resume :", ContactList.isEmpty() + " "
+ ContactList.size());
if (!ContactList.isEmpty()) {
Log.v("name on resume :", ContactList.get(0).Name);
Log.v("name on resume :", ContactList.get(0).Number);
ContactsArray = getContactsArray(ContactList);
contactsAdapter = new ContactsAdapter(Contacts.this, R.layout.contacts_listitem,ContactsArray);
contactsAdapter.notifyDataSetChanged();
EmergencyContactList.setAdapter(contactsAdapter);
}
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.add_new:
Intent NewContactIntent = new Intent(Contacts.this,
SOSAddNewContact.class);
startActivityForResult(NewContactIntent, NEW);
break;
case R.id.from_contacts:
Intent intent = new Intent(Intent.ACTION_PICK,
ContactsContract.Contacts.CONTENT_URI);
// calling OnActivityResult with intenet And Some conatct for
// Identifie
startActivityForResult(intent, PICK);
break;
}
}
@Override
public void onActivityResult(int reqCode, int resultCode, Intent data) {
super.onActivityResult(reqCode, resultCode, data);
String name = null;
String PhoneNumber = "";
switch (reqCode) {
case (PICK):
Uri contactData = data.getData();
Cursor c = managedQuery(contactData, null, null, null, null);
if (c.moveToFirst()) {
name = c.getString(c
.getColumnIndex(ContactsContract.Contacts.DISPLAY_NAME));
Log.v("_ID", name);
int HasNumber = c
.getColumnIndex(ContactsContract.Contacts.HAS_PHONE_NUMBER);
if (HasNumber > 0) {
Uri result = data.getData();
Log.v("TAG", "Got a contact result: " + result.toString());
String id = result.getLastPathSegment();
try {
c = getContentResolver().query(Phone.CONTENT_URI, null,
Phone.CONTACT_ID + "=?", new String[] { id },
null);
int contactnumberidx = c.getColumnIndex(Phone.DATA);
if (c.moveToFirst()) {
PhoneNumber = c.getString(contactnumberidx);
Log.v("TAG", "Got number: " + PhoneNumber);
CD = new ContactDetails(name, PhoneNumber);
ContactList.add(CD);
} else {
Log.w("TAG", "No results");
}
} catch (Exception e) {
Log.e("TAG", "Failed to get phone data", e);
} finally {
if (c != null) {
c.close();
}
}
}
}
break;
case NEW :
if(resultCode == Activity.RESULT_OK)
Log.v("on activity result", "OK");
else
Log.v("result", "not OK");
Bundle extras = data.getExtras();
if(extras != null){
name = extras.getString("Name");
PhoneNumber = extras.getString("Number");
CD = new ContactDetails(name, PhoneNumber);
ContactList.add(CD);
for(int i = 0;i<ContactList.size();i++)
Log.v("ContactList", i+" "+ContactList.get(i).Name);
}else{
Log.v("extras ", "NULL");
}
break;
}
}
public String[] getContactsArray(ArrayList<ContactDetails> List){
if(!List.isEmpty()){
for(int i=0;i<=List.size()-1;i++){
ContactsArray = new String[List.size()];
ContactsArray[i] = List.get(i).Name +"\n"+ List.get(i).Number;
}
}
return ContactsArray;
}
}
logcat的
01-16 17:23:50.954: I/InputReader(61): Device reconfigured: id=0x0, name=qwerty2, display size is now 320x480
01-16 17:23:50.954: I/InputManager-Callbacks(61): No virtual keys found for device qwerty2.
01-16 17:23:51.379: I/ARMAssembler(61): generated scanline__00000077:03515104_00001004_00000000 [ 65 ipp] (85 ins) at [0x4437d520:0x4437d674] in 908313 ns
01-16 17:23:51.399: I/ARMAssembler(61): generated scanline__00000177:03515104_00001001_00000000 [ 91 ipp] (114 ins) at [0x4437d678:0x4437d840] in 707349 ns
01-16 17:23:52.950: I/ActivityManager(61): Starting: Intent { cmp=com.sos.emergency/.SOSAddContacts } from pid 386
01-16 17:23:53.080: V/contactlist on resume :(386): true 0
01-16 17:23:53.389: I/ActivityManager(61): Displayed com.sos.emergency/.Contacts: +415ms
01-16 17:23:54.040: I/ActivityManager(61): Starting: Intent { cmp=com.sos.emergency/.SOSAddNewContact } from pid 386
01-16 17:23:54.429: I/ActivityManager(61): Displayed com.sos.emergency/.SOSAddNewContact: +374ms
01-16 17:24:05.449: W/KeyCharacterMap(386): No keyboard for id 0
01-16 17:24:05.449: W/KeyCharacterMap(386): Using default keymap: /system/usr/keychars/qwerty.kcm.bin
01-16 17:24:13.729: D/dalvikvm(61): GREF has increased to 401
01-16 17:24:24.400: V/intent data(386): abc 5555555555
01-16 17:24:24.450: V/on activity result(386): OK
01-16 17:24:24.450: V/ContactList(386): 0 abc
01-16 17:24:24.450: V/contactlist on resume :(386): false 1
01-16 17:24:24.459: V/name on resume :(386): abc
01-16 17:24:24.459: V/name on resume :(386): 5555555555
01-16 17:24:26.850: I/ActivityManager(61): Starting: Intent { act=android.intent.action.PICK dat=content://com.android.contacts/contacts cmp=com.android.contacts/.ContactsListActivity } from pid 386
01-16 17:24:27.230: D/dalvikvm(180): GC_CONCURRENT freed 482K, 49% free 3050K/5959K, external 716K/1038K, paused 4ms+5ms
01-16 17:24:27.400: I/ContactsListActivity(180): Called with action: android.intent.action.PICK
01-16 17:24:28.299: I/ActivityManager(61): Displayed com.android.contacts/.ContactsListActivity: +1s431ms
01-16 17:24:30.419: V/_ID(386): Jordan
01-16 17:24:30.419: V/TAG(386): Got a contact result: content://com.android.contacts/contacts/lookup/0r4-3F494F332D47/4
01-16 17:24:30.480: V/TAG(386): Got number: 845-435-3555
01-16 17:24:30.489: V/contactlist on resume :(386): false 2
01-16 17:24:30.489: V/name on resume :(386): abc
01-16 17:24:30.489: V/name on resume :(386): 5555555555
01-16 17:24:30.550: W/InputManagerService(61): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@4050be88 (uid=10000 pid=180)
01-16 17:24:39.319: I/ActivityManager(61): Starting: Intent { act=android.intent.action.PICK dat=content://com.android.contacts/contacts cmp=com.android.contacts/.ContactsListActivity } from pid 386
01-16 17:24:39.360: I/ContactsListActivity(180): Called with action: android.intent.action.PICK
01-16 17:24:39.689: D/dalvikvm(180): GC_CONCURRENT freed 333K, 47% free 3238K/6023K, external 914K/1038K, paused 5ms+6ms
01-16 17:24:39.979: I/ActivityManager(61): Displayed com.android.contacts/.ContactsListActivity: +643ms
01-16 17:24:41.269: V/_ID(386): Akriti
01-16 17:24:41.269: V/TAG(386): Got a contact result: content://com.android.contacts/contacts/lookup/0r3-2D414F3D533D/3
01-16 17:24:41.309: V/TAG(386): Got number: 854-741-1111
01-16 17:24:41.319: V/contactlist on resume :(386): false 3
01-16 17:24:41.330: V/name on resume :(386): abc
01-16 17:24:41.330: V/name on resume :(386): 5555555555
01-16 17:24:41.389: W/InputManagerService(61): Starting input on non-focused client com.android.internal.view.IInputMethodClient$Stub$Proxy@4050be88 (uid=10000 pid=180)
01-16 17:25:00.189: D/dalvikvm(130): GC_CONCURRENT freed 246K, 48% free 2970K/5703K, external 956K/1038K, paused 5ms+6ms
答案 0 :(得分：0)
尝试对当前的适配器类进行以下更改：
public class ContactsAdapter extends BaseAdapter {
ArrayList<ContactDetails> contactDetails = new ArrayList<ContactDetails>();
Context c;
LayoutInflater mInflater;
public ContactsAdapter(Context context,ArrayList<ContactDetails> ContactDetails) {
contactDetails = ContactDetails;
c=context;
mInflater = LayoutInflater.from(context);
Log.v("constructor", contactDetails.size()+"");
}
@Override
public int getCount() {
Log.v("getCount", "");
return contactDetails.size();
}
@Override
public Object getItem(int position) {
Log.v("getItem", position+" ");
return contactDetails.get(position);
}
@Override
public long getItemId(int position) {
Log.v("getItemId", position+"");
return position;
}
@Override
public View getView(int position, View convertView,ViewGroup parent) {
final ViewHolder holder;
Log.v("in :","get View");
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.contacts_listitem, null);
holder = new ViewHolder();
holder.text=(TextView)convertView.findViewById(R.id.text);
convertView.setTag(holder);
Log.v("TAG", "convert view not null");
}
else
holder=(ViewHolder)convertView.getTag();
textview.setText(contactDetails.get(position).Name);
return convertView;
}
static class ViewHolder
{
TextView text;
}
}
还包括名为 contacts_listitem.xml 的布局文件，如下面的答案所示。
现在您还需要在主要活动中更改这些行：
...
contactsAdapter = new ContactsAdapter(Contacts.this,ContactList);
EmergencyContactList.setAdapter(contactsAdapter);
...
在这里，您还没有将适配器设置为列表视图，因此它没有向您显示任何内容。您错过了 EmergencyContactList.setAdapter（contactsAdapter）; 这一行。 请按上述方式行事，让我知道结果。
编辑：
您也可以尝试使用自定义ArrayAdapter类，如：
<强> ContactsAdapter.class：
public class ContactsAdapter extends ArrayAdapter<String> {
String[] array;
LayoutInflater mInflater;
public ContactsAdapter(Context context, int textViewResourceId,
String[] objects)
{
super(context, textViewResourceId, objects);
array=objects;
mInflater = LayoutInflater.from(context);
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
final ViewHolder holder;
if(convertView==null)
{
convertView = mInflater.inflate(R.layout.contacts_listitem, null);
holder = new ViewHolder();
holder.text=(TextView)convertView.findViewById(R.id.text);
convertView.setTag(holder);
}
else
holder=(ViewHolder)convertView.getTag();
holder.text.setText(array[position]);
return convertView;
}
static class ViewHolder
{
TextView text;
}
}
创建布局文件 contacts_listitem.xml ：
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:id="@+id/text"
android:textSize="18dip"
android:padding="5dip"
android:textColor="#90000000"
android:layout_weight="0.9"
/>
</LinearLayout>
现在您需要在主要活动中使用ContactsAdapter的对象，如：
...
ContactsAdapter aa=new ContactsAdapter(context,R.layout.contacts_listitem, new String[]{"contact1","contact2","contact3","contacts4"});
listView.setAdapter(aa);
...
在这里，您可以相应地在onActivityResult（）中构建您的String数组。（我没有得到您在适配器类中所做的事情来显示联系人详细信息，所以我只是将String数组中的字符串放在适配器中。您必须编写代码根据您的需要。）
编辑：
更改应用中的以下代码行：
public String[] getContactsArray(ArrayList<ContactDetails> List)
{
ContactsArray = new String[List.size()];
for(int i=0;i<=List.size()-1;i++)
{
ContactsArray[i] = List.get(i).Name +"\n"+ List.get(i).Number;
}
return ContactsArray;
}
在这里，您无需检查列表是否为空，因为您在调用此函数之前已经这样做了。