Android的 - 片段内扩展列表 [英] Android - Expandable List within Fragments
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问题描述
嘿，我想我现有的应用程序中使用Tabhost与活动转换成基于操作栏应用程序与片段。在此过程中跑进问题来实现扩展列表。
我haven't发现任何简单的例子，在互联网上如何实现这种扩展列表。由于ExpandableListActivity没有对应的内容片断，我想我需要使用和扩展ListFragment但我很新到Android我haven't有任何线索如何。 :)
我会很高兴，如果有人可以阐明如何使用碎片可扩展列表的一些情况。
感谢。
附件也是我现有的code片段。
片段1两个微调已经
公共类Configurator_Fragment扩展SherlockListFragment {
@覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
捆绑savedInstanceState）{
如果（集装箱== NULL）{
}
最后的视图V = inflater.inflate（R.layout.configurator_layout，
集装箱，FALSE）; 最后的微调微调=（微调）V
.findViewById（R.id.spinner1）;
ArrayAdapter＆LT;＆CharSequence的GT;适配器= ArrayAdapter.createFromResource（
getActivity（），R.array.array1，
android.R.layout.simple_spinner_item）;
adapter.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
spinner.setAdapter（适配器）; 最后的微调spinner2 =（微调）v.findViewById（R.id.spinner2）;
ArrayAdapter＆LT;＆CharSequence的GT;适配器2 = ArrayAdapter.createFromResource（
getActivity（），R.array.array2，
android.R.layout.simple_spinner_item）;
adapter2.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
spinner2.setAdapter（适配器2）; 返回伏;
}
}
FragmentActivity
公共类TabActivity扩展SherlockFragmentActivity {
ViewPager mViewPager;
TabsAdapter mTabsAdapter;
@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.tab_navigation）;
如果（savedInstanceState == NULL）{ 片段newFragment =新Configurator_Fragment（）;
片段newFragment2 =新SecondFragment（）; FragmentTransaction英尺= getSupportFragmentManager（）调用BeginTransaction（）。
ft.add（R.id.pager，newFragment，第一）;
ft.add（R.id.pager，newFragment2，二）;
ft.commit（）; } 。getSupportActionBar（）setNavigationMode（ActionBar.NAVIGATION_MODE_TABS）; ActionBar.Tab TAB1 = getSupportActionBar（）newTab（）的setText（片段1）。。
ActionBar.Tab TAB2 = getSupportActionBar（）newTab（）的setText（片段2）。。 mViewPager =（ViewPager）findViewById（R.id.pager）;
mTabsAdapter =新TabsAdapter（这一点，getSupportActionBar（），mViewPager）; mTabsAdapter.addTab（TAB1，Configurator_Fragment.class，NULL）;
mTabsAdapter.addTab（TAB2，SecondFragment.class，NULL）;
如果（savedInstanceState！= NULL）{
。getSupportActionBar（）setSelectedNavigationItem（savedInstanceState.getInt（指数））;
}}
@覆盖
保护无效的onSaveInstanceState（捆绑outState）{ super.onSaveInstanceState（outState）;
outState.putInt（指数，getSupportActionBar（）getSelectedNavigationIndex（））;
}
公共静态类TabsAdapter扩展FragmentPagerAdapter实现ViewPager.OnPageChangeListener，ActionBar.TabListener {
私人最终上下文mContext;
私人最终动作条毫巴;
私人最终ViewPager mViewPager;
私人最终的ArrayList＆LT; TabInfo＆GT; mTabs =新的ArrayList＆LT; TabInfo＆GT;（）;
私人FragmentTransaction mCurTransaction = NULL;
静态final类TabInfo {
私人最终级＆LT;＆GT; CLSS;
私人最终捆绑ARGS; TabInfo（类＆LT;＆GT; _class，捆绑_args）{
CLSS = _class;
ARGS = _args;
}
} 公共TabsAdapter（FragmentActivity活动，动作条酒吧，ViewPager寻呼机）{
超级（activity.getSupportFragmentManager（））;
mContext =活动;
毫巴=栏;
mViewPager =寻呼机;
mViewPager.setAdapter（本）;
mViewPager.setOnPageChangeListener（本）;
} 公共无效addTab（ActionBar.Tab标签，类＆LT ;?扩展片断＆gt; CLSS，捆绑参数）{
TabInfo信息=新TabInfo（CLSS，参数）;
tab.setTag（信息）;
tab.setTabListener（本）;
mTabs.add（信息）;
mBar.addTab（标签）;
notifyDataSetChanged（）;
} @覆盖
公众诠释的getCount（）{
返回mTabs.size（）;
}
@覆盖
公共片段的getItem（INT位置）{
TabInfo信息= mTabs.get（位置）;
返回Fragment.instantiate（mContext，info.clss.getName（），info.args）;
} @覆盖
公共无效onPageScrolled（INT位置，浮positionOffset，诠释positionOffsetPixels）{ } @覆盖
公共无效使用onPageSelected（INT位置）{
mBar.setSelectedNavigationItem（位置）;
} @覆盖
公共无效onPageScrollStateChanged（INT状态）{
} @覆盖
公共无效onTabSelected（标签选项卡，FragmentTransaction英尺）{
对象标记= tab.getTag（）;
的for（int i = 0; I＆LT; mTabs.size（）;我++）{
如果（mTabs.get（ⅰ）==标签）{ mViewPager.setCurrentItem（ⅰ）;
}
}
} @覆盖
公共无效onTabUnselected（标签选项卡，FragmentTransaction英尺）{ } @覆盖
公共无效onTabReselected（标签选项卡，FragmentTransaction英尺）{ }
}}
解决方案
一对夫妇免责声明第一...
1）我没有用ABS，所以我不知道什么样的变化，这将使。结果
2）我ExpandableListView由数据库，而不是阵列的支持。我说这becasue它看起来像你使用数组。我的希望反正发布此它可能仍然为你提供一些方向。
这是说，我只是通过延长片段做了。
公共类EventListFragment扩展片段{ 私人AttendanceDB mDbHelper;
公共静态光标mGroupsCursor;
私人MyExpandableListAdapter mAdapter;
私人字符串mgroup首项;
私人字符串mChild; @覆盖
公共查看onCreateView（LayoutInflater充气器，容器的ViewGroup，
捆绑savedInstanceState）{
视图V = inflater.inflate（R.layout.explistfragment，集装箱，FALSE）;
标题=（TextView中）v.findViewById（R.id.header1）;
header.setText（R.string.event_header）;
返回伏;
} @覆盖
公共无效onActivityCreated（捆绑savedInstanceState）{
super.onActivityCreated（savedInstanceState）;
捆绑额外= getIntent（）getExtras（）。
mgroup首项= extras.getString（「本集团」）;
mChild = extras.getString（子）;
mDbHelper =新AttendanceDB（getActivity（））;
mDbHelper.open（）;
fillData（mgroup首项，mChild）;
} 私人无效fillData（弦乐群，串儿）{
ExpandableListView LV;
mGroupsCursor = mDbHelper.fetchGroup（组）;
。getActivity（）startManagingCursor（mGroupsCursor）;
mGroupsCursor.moveToFirst（）;
LV =（ExpandableListView）getActivity（）findViewById（R.id.explist）。 mAdapter =新MyExpandableListAdapter（mGroupsCursor，getActivity（）
R.layout.explistlayout，
R.layout.explistlayout1，
新的String [] {_id}，
新的INT [] {} android.R.id.text1，
新的String [] {}孩子，
新的INT [] {android.R.id.text1}）;
lv.setAdapter（mAdapter）;
} 公共类MyExpandableListAdapter扩展SimpleCursorTreeAdapter { 公共MyExpandableListAdapter（光标指针，上下文的背景下，
INT的GroupLayout，诠释childLayout，字符串[] groupFrom，
INT [] groupTo，字符串[] childrenFrom，INT [] childrenTo）{
超（背景下，光标的GroupLayout，groupFrom，groupTo，
childLayout，childrenFrom，childrenTo）;
}
@覆盖
保护光标getChildrenCursor（光标groupCursor）{
光标childCursor = mDbHelper.fetchChildren（mgroup首项，groupCursor
.getString（groupCursor
.getColumnIndex（AttendanceDB.EVENT_ROWID）））;
。getActivity（）startManagingCursor（childCursor）;
childCursor.moveToFirst（）;
返回childCursor;
}
}}
Hey, I am trying to convert my existing App using Tabhost and Activities to a Action Bar based App with fragments. In this process a ran into the issue to implement Expandable Lists.
I haven´t found any simple example in the internet on how to implement this Expandable List. As ExpandableListActivity has no counterpart for fragments I think I need to use and extend ListFragment but as I am quite new to android I haven´t got any clue how. :)
I would be glad if someone could shed some light on how to use an expandable list with fragments.
Thanks.
Attached is also a snippet of my existing code.
Fragment 1 with two spinners already
public class Configurator_Fragment extends SherlockListFragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
if (container == null) {
}
final View v = inflater.inflate(R.layout.configurator_layout,
container, false);
final Spinner spinner = (Spinner) v
.findViewById(R.id.spinner1);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
getActivity(), R.array.array1,
android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner.setAdapter(adapter);
final Spinner spinner2 = (Spinner) v.findViewById(R.id.spinner2);
ArrayAdapter<CharSequence> adapter2 = ArrayAdapter.createFromResource(
getActivity(), R.array.array2,
android.R.layout.simple_spinner_item);
adapter2.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
spinner2.setAdapter(adapter2);
return v;
}
}
FragmentActivity
public class TabActivity extends SherlockFragmentActivity {
ViewPager mViewPager;
TabsAdapter mTabsAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.tab_navigation);
if (savedInstanceState == null) {
Fragment newFragment = new Configurator_Fragment();
Fragment newFragment2 = new SecondFragment();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.add(R.id.pager, newFragment, "First");
ft.add(R.id.pager, newFragment2, "Second");
ft.commit();
}
getSupportActionBar().setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tab1 = getSupportActionBar().newTab().setText("Fragment 1");
ActionBar.Tab tab2 = getSupportActionBar().newTab().setText("Fragment 2");
mViewPager = (ViewPager)findViewById(R.id.pager);
mTabsAdapter = new TabsAdapter(this, getSupportActionBar(), mViewPager);
mTabsAdapter.addTab(tab1, Configurator_Fragment.class, null);
mTabsAdapter.addTab(tab2, SecondFragment.class, null);
if (savedInstanceState != null) {
getSupportActionBar().setSelectedNavigationItem(savedInstanceState.getInt("index"));
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("index", getSupportActionBar().getSelectedNavigationIndex());
}
public static class TabsAdapter extends FragmentPagerAdapter implements ViewPager.OnPageChangeListener, ActionBar.TabListener {
private final Context mContext;
private final ActionBar mBar;
private final ViewPager mViewPager;
private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
private FragmentTransaction mCurTransaction = null;
static final class TabInfo {
private final Class<?> clss;
private final Bundle args;
TabInfo(Class<?> _class, Bundle _args) {
clss = _class;
args = _args;
}
}
public TabsAdapter(FragmentActivity activity, ActionBar bar, ViewPager pager) {
super(activity.getSupportFragmentManager());
mContext = activity;
mBar = bar;
mViewPager = pager;
mViewPager.setAdapter(this);
mViewPager.setOnPageChangeListener(this);
}
public void addTab(ActionBar.Tab tab, Class<? extends Fragment> clss, Bundle args) {
TabInfo info = new TabInfo(clss, args);
tab.setTag(info);
tab.setTabListener(this);
mTabs.add(info);
mBar.addTab(tab);
notifyDataSetChanged();
}
@Override
public int getCount() {
return mTabs.size();
}
@Override
public Fragment getItem(int position) {
TabInfo info = mTabs.get(position);
return Fragment.instantiate(mContext, info.clss.getName(), info.args);
}
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
mBar.setSelectedNavigationItem(position);
}
@Override
public void onPageScrollStateChanged(int state) {
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
Object tag = tab.getTag();
for (int i=0; i<mTabs.size(); i++) {
if (mTabs.get(i) == tag) {
mViewPager.setCurrentItem(i);
}
}
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}
}
解决方案
A couple disclaimers first...
1) I haven't used ABS, so I'm not sure what changes that would make.
2) My ExpandableListView is backed by a database, not arrays. I say this becasue it looks like you are using arrays. I post this anyway in the hopes it might still provide you with some direction.
That said, I've done it simply by extending Fragment.
public class EventListFragment extends Fragment {
private AttendanceDB mDbHelper;
public static Cursor mGroupsCursor;
private MyExpandableListAdapter mAdapter;
private String mGroup;
private String mChild;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.explistfragment, container, false);
header = (TextView) v.findViewById(R.id.header1);
header.setText(R.string.event_header);
return v;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
Bundle extras = getIntent().getExtras();
mGroup = extras.getString("Group");
mChild = extras.getString("Child");
mDbHelper = new AttendanceDB(getActivity());
mDbHelper.open();
fillData(mGroup, mChild);
}
private void fillData(String group, String child) {
ExpandableListView lv;
mGroupsCursor = mDbHelper.fetchGroup(group);
getActivity().startManagingCursor(mGroupsCursor);
mGroupsCursor.moveToFirst();
lv = (ExpandableListView) getActivity().findViewById(R.id.explist);
mAdapter = new MyExpandableListAdapter(mGroupsCursor, getActivity(),
R.layout.explistlayout,
R.layout.explistlayout1,
new String[] { "_id" },
new int[] { android.R.id.text1 },
new String[] { child },
new int[] { android.R.id.text1 });
lv.setAdapter(mAdapter);
}
public class MyExpandableListAdapter extends SimpleCursorTreeAdapter {
public MyExpandableListAdapter(Cursor cursor, Context context,
int groupLayout, int childLayout, String[] groupFrom,
int[] groupTo, String[] childrenFrom, int[] childrenTo) {
super(context, cursor, groupLayout, groupFrom, groupTo,
childLayout, childrenFrom, childrenTo);
}
@Override
protected Cursor getChildrenCursor(Cursor groupCursor) {
Cursor childCursor = mDbHelper.fetchChildren(mGroup, groupCursor
.getString(groupCursor
.getColumnIndex(AttendanceDB.EVENT_ROWID)));
getActivity().startManagingCursor(childCursor);
childCursor.moveToFirst();
return childCursor;
}
}
}
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