我有一个包含3个片段的活动，每个片段在每个页面上为用户提取一组信息。我已经以列表中只有2个用户的方式进行设置，第三个片段将自己重定向到第二个用户，如果只有一个用户，则第二个片段会在刷到第一个片段时重定向。
以下是我用于在片段之间切换的代码：
Fragment mFragment = new Fragment1();
getFragmentManager().beginTransaction()
.replace(R.id.Fragment1, mFragment ).commit();
以下是完整的代码
public class Fragment2 extends Fragment {
private String currentUserId;
private ArrayAdapter<String> namesArrayAdapter;
private ArrayList<String> names;
private ListView usersListView;
private Button logoutButton;
String userGender = ParseUser.getCurrentUser().getString("Gender");
String activityName = ParseUser.getCurrentUser().getString("ActivityName");
Number maxDistance = ParseUser.getCurrentUser().getNumber("Maximum_Distance");
String userLookingGender = ParseUser.getCurrentUser().getString("Looking_Gender");
Number minimumAge = ParseUser.getCurrentUser().getNumber("Minimum_Age");
Number maximumAge = ParseUser.getCurrentUser().getNumber("Maximum_Age");
Number userage = ParseUser.getCurrentUser().getNumber("Age");
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
setConversationsList();
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment2_layout, container, false);
return view;
}
private void setConversationsList() {
currentUserId = ParseUser.getCurrentUser().getObjectId();
names = new ArrayList<String>();
// String userActivitySelectionName = null;
ParseQuery<ParseUser> query = ParseUser.getQuery();
// query.whereEqualTo("ActivityName",userActivitySelectionName);
query.whereNotEqualTo("objectId", ParseUser.getCurrentUser().getObjectId());
// users with Gender = currentUser.Looking_Gender
query.whereEqualTo("Gender", userLookingGender);
// users with Looking_Gender = currentUser.Gender
query.setLimit(1);
query.setSkip(1); // will skip the first result, giving the 2nd most recent user
query.whereEqualTo("Looking_Gender", userGender);
query.whereEqualTo("ActivityName", activityName);
//query.whereGreaterThanOrEqualTo("Minimum_Age", minimumAge).whereGreaterThanOrEqualTo("Age", userage);
//query.whereLessThanOrEqualTo("Maximum_Age", maximumAge).whereLessThanOrEqualTo("Age", userage);
// query.whereWithinKilometers("Maximum_Distance", point, maxDistance)
query.findInBackground(new FindCallback<ParseUser>() {
public void done(List<ParseUser> userList, ParseException e) {
if (e == null) {
for (int i=0; i<userList.size(); i++) {
names.add(userList.get(i).get("Name").toString());
names.add(userList.get(i).get("Headline").toString());
names.add(userList.get(i).get("Age").toString());
// names.add(userList.get(i).getParseObject("ProfilePicture").;
}
usersListView = (ListView)getActivity().findViewById(R.id.userlistview2);
namesArrayAdapter =
new ArrayAdapter<String>(getActivity().getApplicationContext(),
R.layout.user_list_item, names);
usersListView.setAdapter(namesArrayAdapter);
usersListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View v, int i, long l) {
openConversation(names, i);
}
});
} else {
Fragment mFragment = new Fragment1();
getFragmentManager().beginTransaction()
.replace(R.id.Fragment1, mFragment ).commit();
}
}
});
}
public void openConversation(ArrayList<String> names, int pos) {
ParseQuery<ParseUser> query = ParseUser.getQuery();
query.whereEqualTo("Name", names.get(pos));
query.findInBackground(new FindCallback<ParseUser>() {
public void done(List<ParseUser> user, ParseException e) {
if (e == null) {
Intent intent = new Intent(getActivity().getApplicationContext(), MessagingActivity.class);
intent.putExtra("RECIPIENT_ID", user.get(0).getObjectId());
startActivity(intent);
} else {
Toast.makeText(getActivity().getApplicationContext(),
"Error finding that user",
Toast.LENGTH_SHORT).show();
}
}
});
}
}
下面是第一个片段的布局
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="@drawable/bac_blue"
android:orientation="vertical" >
<ListView
android:id="@+id/userlistname"
android:layout_width="220dp"
android:layout_centerHorizontal="true"
android:layout_height="50dp"
android:divider="@null"
>
</ListView>
<FrameLayout
android:id="@+id/Fragment1"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1" />
<ListView
android:id="@+id/userlistheadline"
android:layout_width="220dp"
android:layout_below="@+id/userlistname"
android:layout_centerHorizontal="true"
android:layout_height="50dp"
android:divider="@null"
>
</ListView>
<ImageView
android:id="@+id/profilePictureResult"
android:layout_width="132dp"
android:layout_height="120dp"
android:layout_below="@+id/userlistheadline"
android:layout_centerHorizontal="true"
android:layout_marginTop="7dp"
android:layout_marginBottom="9dp"
android:padding="3dp"
android:scaleType="centerCrop"
android:cropToPadding="true"
android:background="@drawable/border_image"
android:alpha="1" />
<ListView
android:id="@+id/userlistage"
android:layout_width="220dp"
android:layout_below="@+id/profilePictureResult"
android:layout_centerHorizontal="true"
android:layout_height="50dp"
android:divider="@null"
>
</ListView>
<ListView
android:id="@+id/userlistactivityname"
android:layout_width="220dp"
android:layout_below="@+id/profilePictureResult"
android:layout_centerHorizontal="true"
android:layout_height="50dp"
android:divider="@null"
>
</ListView>
<Button
android:id="@+id/button1"
android:layout_below="@+id/userlistactivityname"
android:layout_centerHorizontal="true"
android:layout_width="100dp"
android:layout_height="50dp"
android:layout_marginTop="12dp"
android:alpha="0.7"
android:textColor="#000000"
android:background="#ADD8E6"
android:textSize="22sp"
android:typeface="serif"
android:text="Confirm" />
<ImageView
android:id="@+id/imageView2"
android:layout_width="70dp"
android:layout_height="50dp"
android:layout_alignParentRight="true"
android:layout_alignTop="@+id/imageView1"
android:alpha="0.7"
android:src="@drawable/left_right" />
<ImageView
android:id="@+id/imageView1"
android:layout_width="70dp"
android:layout_height="50dp"
android:layout_alignBottom="@+id/userlistview"
android:layout_alignParentLeft="true"
android:layout_marginBottom="119dp"
android:alpha="0.7"
android:src="@drawable/left_arrow2" />
</RelativeLayout>
提前致谢。