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儘管我一直在閱讀有關我的問題的其他主題，但我無法弄清楚我的問題的原因。不能用另一個代替片段
我有一個活動，左邊有一個ListView。右邊是一個ListFragment，你可以看到它的activity_question.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="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dip"
android:layout_weight="1"
android:orientation="horizontal" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="3"
android:orientation="vertical" >
<TextView
android:id="@+id/textViewCategoryTitle"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:layout_weight="10"
android:background="@drawable/in_progress_background"
android:gravity="center" />
<ListView
android:id="@+id/listViewQuestionsGroup"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1" />
</LinearLayout>
<fragment
android:id="@+id/fragmentQuestions"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_weight="1"
class="com.firm.bonjour.visite.QuestionsFragment" />
</LinearLayout>
<Button
android:id="@+id/buttonValidate"
style="@style/ButtonsValidation"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|right"
android:text="@string/validate" />
</LinearLayout>
我已經創建了一個轉接頭片段的ListView控件：
public class QuestionsAdapter extends BaseAdapter {
private QuestionsBean questions = null;
private LayoutInflater inflater = null;
public QuestionsAdapter(LayoutInflater inflater) {
this.inflater = inflater;
}
@Override
public int getCount() {
return (questions != null && questions.getQuestionList() != null) ? questions.getQuestionList().size() : 0;
}
@Override
public Object getItem(int position) {
return (questions != null && questions.getQuestionList() != null) ? questions.getQuestionList().get(position) : null;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
holder = new ViewHolder();
convertView = inflater.inflate(R.layout.item_fragment_question, null);
holder.question = (TextView) convertView.findViewById(R.id.questionsLayout);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.question.setText(((QuestionsBean) questions).getQuestionList().get(position).getQuestion());
return convertView;
}
private class ViewHolder {
TextView question;
}
public void setQuestions(QuestionsBean questions) {
this.questions = questions;
notifyDataSetChanged();
}
}
當我開始活動，我選擇左側ListView中的第一個項目以在Fragment中顯示細節。 一旦我點擊我的左側ListView中的一個項目，碎片不會改變。 當我在調試模式下，我可以看到適配器得到正確的對象來顯示。
你有什麼想法爲什麼新的片段不顯示？
我的活動代碼：
public class QuestionsActivity extends Activity implements OnItemClickListener {
public static final String QUESTIONS_LIST = "questionsList";
public static final String QUESTIONS = "questions";
private CategoryBean category;
private ListView questionsGroupListView;
private Fragment questionsFragment;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_questions);
category = (CategoryBean) getIntent().getExtras().get(MainActivity.CATEGORY);
questionsGroupListView = (ListView) findViewById(R.id.listViewQuestionsGroup);
QuestionListAdapter adapter = new QuestionListAdapter(this, category);
questionsGroupListView.setAdapter(adapter);
questionsGroupListView.setOnItemClickListener(this);
if (getFragmentManager().findFragmentById(R.id.fragmentQuestions) == null) {
questionsFragment = new QuestionsFragment();
getFragmentManager().beginTransaction().add(R.layout.activity_questions, questionsFragment).commit();
} else {
questionsFragment = getFragmentManager().findFragmentById(R.id.fragmentQuestions);
}
}
/**
* Called when a number gets clicked
*/
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
displayFragment((QuestionsBean)questionsGroupListView.getItemAtPosition(position));
}
@Override
protected void onResume() {
super.onResume();
if(questionsFragment != null && category.getCategoryList() != null && !category.getCategoryList().isEmpty()) {
((QuestionsFragment)questionsFragment).refresh((QuestionsBean)category.getCategoryList().get(0));
} else {
Log.v("BUGGGGG", "PAS NORMAL !!!");
}
}
/**
* Add a Fragment to our stack with n Androids in it
*/
private void displayFragment(QuestionsBean questions) {
Fragment fragment = QuestionsFragment.newInstance(questions);
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.replace(R.id.fragmentQuestions, fragment);
fragmentTransaction.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN);
fragmentTransaction.commit();
}
}
我ListFragment代碼：
public class QuestionsFragment extends ListFragment {
private LayoutInflater inflater;
private QuestionsAdapter adapter;
private QuestionsBean questions;
/**
* Create a new instance of DetailsFragment, initialized to show the text at 'index'.
*/
public static QuestionsFragment newInstance(QuestionsBean questions) {
QuestionsFragment questionFragment = new QuestionsFragment();
// Supply index input as an argument.
Bundle args = new Bundle();
args.putSerializable(QuestionsActivity.QUESTIONS, questions);
questionFragment.setArguments(args);
return questionFragment;
}
public int getShownIndex() {
return getArguments() != null ? getArguments().getInt("index", 0) : 0;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
this.inflater = inflater;
this.adapter = new QuestionsAdapter(inflater);
View questionsView = (LinearLayout) inflater.inflate(R.layout.layout_fragment_question, null);
setListAdapter(adapter);
return questionsView;
}
@Override
public void onResume() {
super.onResume();
if (getArguments() != null && getArguments().getSerializable(QuestionsActivity.QUESTIONS) != null) {
this.questions = (QuestionsBean) getArguments().getSerializable(QuestionsActivity.QUESTIONS);
adapter.setQuestions((QuestionsBean) getArguments().getSerializable(QuestionsActivity.QUESTIONS));
} else {
adapter.setQuestions(questions);
}
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
}
public void refresh(QuestionsBean questions) {
if (getArguments() != null && getArguments().getSerializable(QuestionsActivity.QUESTIONS) != null) {
this.questions = (QuestionsBean) getArguments().getSerializable(QuestionsActivity.QUESTIONS);
} else {
this.questions = questions;
}
}
}
我真的卡住現在好幾個小時......任何幫助非常感謝:)
等等，你是說你的片段根本沒有顯示出來，還是沒有更新？ – 2012-04-01 08:15:15