【发布时间】：2017-03-26 14:59:34
【问题描述】：
我的应用程序中有一个 ListView，我从用户电话簿中获取联系人，然后将它们显示到 ListView 中，现在我要做的是根据某些条件将不同的子视图添加到 ListView 项中，例如我的应用程序检查每个电话簿联系人它在服务器数据库上可用，我想要实现的是为该特定联系人添加语音/视频通话按钮，并为数据库中不可用的所有其他联系人添加邀请按钮。
我的条件适用于这三个子项的 ListView 项、语音通话按钮、视频通话按钮和邀请按钮，我的条件是如果用户在数据库中可用，那么我只想显示语音/视频通话按钮并隐藏邀请按钮但是如果用户不可用，那么我想显示邀请按钮并隐藏音频/视频通话按钮
列表视图
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ListView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/contacts_listview"/>
</RelativeLayout>
列表视图项
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:orientation="horizontal"
android:minHeight="?android:attr/listPreferredItemHeight"
android:padding="16dp">
<ImageView
android:id="@+id/contact_item_icon"
android:layout_width="50dp"
android:layout_height="50dp"/>
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:orientation="vertical"
android:paddingLeft="16dp">
<TextView
android:id="@+id/contact_item_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Feel The Light" />
<TextView
android:id="@+id/contact_item_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Home" />
</LinearLayout>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_user_audio_call_dark"/>
<ImageButton
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="@drawable/ic_user_video_call_dark"/>
<Button
android:layout_width="wrap_content"
android:layout_height="30dp"
android:text="Invite"
android:background="@drawable/selector_button_green_oval"
android:textColor="@color/white"/>
</LinearLayout>
联系人片段
public class ContactsAdapter extends ArrayAdapter<ContactItem> {
private static final String LOG_TAG = ContactsAdapter.class.getSimpleName();
public ContactsAdapter(Activity context, List<ContactItem> contactItems) {
super(context, 0, contactItems);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ContactItem contactItem = getItem(position);
if (convertView == null) {
convertView = LayoutInflater.from(getContext()).inflate(R.layout.contact_list_item, parent, false);
}
ImageView contactImage = (ImageView) convertView.findViewById(R.id.contact_item_icon);
contactImage.setImageResource(contactItem.contactImage);
TextView contactName = (TextView) convertView.findViewById(R.id.contact_item_name);
contactName.setText(contactItem.contactName);
TextView contactNumber = (TextView) convertView.findViewById(R.id.contact_item_number);
contactNumber.setText(contactItem.contactNumber);
return convertView;
}
}
联系人片段
public class ContactsListFragment extends Fragment {
private ContactsAdapter contactsAdapter;
public static ContactsListFragment newInstance() {
return new ContactsListFragment();
}
public ContactsListFragment() {
}
ArrayList<String> contactName = new ArrayList<>();
ArrayList<String> contactNumber = new ArrayList<>();
ArrayList<ContactItem> contactsAvailable = new ArrayList<>();
ArrayList<ContactItem> contactsInvite = new ArrayList<>();
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Cursor cursor = getActivity().getContentResolver().query(
ContactsContract.CommonDataKinds.Phone.CONTENT_URI, null, null, null, null
);
String currentNumber = "";
while (cursor.moveToNext()) {
String name = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.DISPLAY_NAME));
String number = cursor.getString(cursor.getColumnIndex(ContactsContract.CommonDataKinds.Phone.NUMBER));
number = number.replaceAll(" ", "");
char c = number.charAt(0);
char c1 = number.charAt(1);
String s = Character.toString(c)+Character.toString(c1);
if (s.equals("00")) {
number = number.replaceAll("00", "+");
}
if (number.length() == 12) {
number = "+" + number;
}
if (number.length() == 13) {
if (!currentNumber.equals(number)) {
contactName.add(name);
contactNumber.add(number);
}
}
currentNumber = number;
}
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
final View rootView = inflater.inflate(R.layout.fragment_contacts_list, container, false);
QBPagedRequestBuilder pagedRequestBuilder = new QBPagedRequestBuilder();
pagedRequestBuilder.setPage(1);
pagedRequestBuilder.setPerPage(50);
QBUsers.getUsersByLogins(contactNumber, pagedRequestBuilder, new QBEntityCallback<ArrayList<QBUser>>() {
@Override
public void onSuccess(ArrayList<QBUser> qbUsers, Bundle bundle) {
for (int i = 0; i < qbUsers.size(); i++) {
ContactItem contactItem = new ContactItem(qbUsers.get(i).getFullName(), qbUsers.get(i).getLogin(), R.drawable.ic_launcher);
contactsAvailable.add(contactItem);
}
contactsAdapter = new ContactsAdapter(getActivity(), contactsAvailable);
ListView listView = (ListView) rootView.findViewById(R.id.contacts_listview_available);
listView.setAdapter(contactsAdapter);
}
@Override
public void onError(QBResponseException e) {
Toast.makeText(getActivity(), e.toString(), Toast.LENGTH_LONG).show();
}
});
return rootView;
}
}
【问题讨论】：
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请在您的文本中添加一个问题。您已经描述了您想要做什么并添加了代码，但没有解释什么不起作用
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标签： android listview fragment adapter