私はアンドロイド技術に不慣れです.私はカスタムListViewを使用して構築したいFragments. Google で検索しましたが、取得できません。助けてください。
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1
私のアプリケーションでは、左右に 2 つのリスト フラグメントを含む画面があり、カスタム リスト ビューがあります。これが必要なものであることを願っています。これらを使用して、役立つかどうか教えてください。
ここにフラグメントを含むクラスがあります
public class MoreChannelsActivity extends FragmentActivity
implements ChannelsMenuFragment.OnHeadlineSelectedListener {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.news_articles);
// Check whether the activity is using the layout version with
// the fragment_container FrameLayout. If so, we must add the first fragment
if (findViewById(R.id.fragment_container) != null) {
// However, if we're being restored from a previous state,
// then we don't need to do anything and should return or else
// we could end up with overlapping fragments.
if (savedInstanceState != null) {
return;
}
// Create an instance of ExampleFragment
ChannelsMenuFragment firstFragment = new ChannelsMenuFragment();
// In case this activity was started with special instructions from an Intent,
// pass the Intent's extras to the fragment as arguments
firstFragment.setArguments(getIntent().getExtras());
// Add the fragment to the 'fragment_container' FrameLayout
getSupportFragmentManager().beginTransaction()
.add(R.id.fragment_container, firstFragment).commit();
}
}
public void onArticleSelected(int position) {
// The user selected the headline of an article from the ChannelsMenuFragment
// Capture the article fragment from the activity layout
/// ChannelsSubMenuFragment articleFrag = (ChannelsSubMenuFragment) getSupportFragmentManager().findFragmentById(R.id.channels_fragment);
TestSubMenuFragment articleFrag = (TestSubMenuFragment) getSupportFragmentManager().findFragmentById(R.id.channels_fragment);
if (articleFrag != null) {
// If article frag is available, we're in two-pane layout...
// Call a method in the ChannelsSubMenuFragment to update its content
// articleFrag.updateArticleView(position);
articleFrag.updateListView(position);
} else {
// If the frag is not available, we're in the one-pane layout and must swap frags...
// Create fragment and give it an argument for the selected article
TestSubMenuFragment newFragment = new TestSubMenuFragment();
Bundle args = new Bundle();
args.putInt(TestSubMenuFragment.ARG_POSITION, position);
newFragment.setArguments(args);
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
// Replace whatever is in the fragment_container view with this fragment,
// and add the transaction to the back stack so the user can navigate back
transaction.replace(R.id.fragment_container, newFragment);
transaction.addToBackStack(null);
// Commit the transaction
transaction.commit();
}
}
}
ここにフラグメントを含むxmlがあります...
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
<fragment
android:id="@+id/menus_fragment"
android:name="com.example.android.fragments.ChannelsMenuFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1" />
<View
android:layout_width="3px"
android:layout_height="fill_parent"
android:layout_marginTop="0dp"
android:background="#FF909090" />
<fragment
android:id="@+id/channels_fragment"
android:name="com.example.android.fragments.TestSubMenuFragment"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="2" />
</LinearLayout>
ここにリストアクティビティクラスがあります
public class ChannelsMenuFragment extends ListFragment {
OnHeadlineSelectedListener mCallback;
// The container Activity must implement this interface so the frag can deliver messages
public interface OnHeadlineSelectedListener {
/** Called by ChannelsMenuFragment when a list item is selected */
public void onArticleSelected(int position);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// We need to use a different list item layout for devices older than Honeycomb
int layout = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ?
android.R.layout.simple_list_item_activated_1 : android.R.layout.simple_list_item_1;
// Create an array adapter for the list view, using the AudioVideoChannelsList headlines array
setListAdapter(new ArrayAdapter<String>(getActivity(), layout, AudioVideoChannelsList.Menus));
}
@Override
public void onStart() {
super.onStart();
// When in two-pane layout, set the listview to highlight the selected list item
// (We do this during onStart because at the point the listview is available.)
if (getFragmentManager().findFragmentById(R.id.channels_fragment) != null) {
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// This makes sure that the container activity has implemented
// the callback interface. If not, it throws an exception.
try {
mCallback = (OnHeadlineSelectedListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
// Notify the parent activity of selected item
mCallback.onArticleSelected(position);
// Set the item as checked to be highlighted when in two-pane layout
getListView().setItemChecked(position, true);
}
}
これは、リスト アダプターに提供した AudioVideoChannelsList という名前のデータ クラスです。
public class AudioVideoChannelsList {
static String[] Menus = {
"Channel One",
"Channel Two"
};
static String[] ChannelsList1 = {
"Country",
"Genre",
"Language"
};
static String[] ChannelsList = {
"Article One\n\nExcepteur pour-over occaecat squid biodiesel umami gastropub, nulla laborum salvia dreamcatcher fanny pack. Ullamco culpa retro ea, trust fund excepteur eiusmod direct trade banksy nisi lo-fi cray messenger bag. Nesciunt esse carles selvage put a bird on it gluten-free, wes anderson ut trust fund twee occupy viral. Laboris small batch scenester pork belly, leggings ut farm-to-table aliquip yr nostrud iphone viral next level. Craft beer dreamcatcher pinterest truffaut ethnic, authentic brunch. Esse single-origin coffee banksy do next level tempor. Velit synth dreamcatcher, magna shoreditch in american apparel messenger bag narwhal PBR ennui farm-to-table.",
"Article Two\n\nVinyl williamsburg non velit, master cleanse four loko banh mi. Enim kogi keytar trust fund pop-up portland gentrify. Non ea typewriter dolore deserunt Austin. Ad magna ethical kogi mixtape next level. Aliqua pork belly thundercats, ut pop-up tattooed dreamcatcher kogi accusamus photo booth irony portland. Semiotics brunch ut locavore irure, enim etsy laborum stumptown carles gentrify post-ironic cray. Butcher 3 wolf moon blog synth, vegan carles odd future."
};
static String[] ChannelsList2 = {
"Country2",
"Genre2",
"Language2"
};
}
ここに 2 番目のリスト アクティビティ クラスがあります
public class TestSubMenuFragment extends ListFragment {
// The container Activity must implement this interface so the frag can deliver messages
public interface OnHeadlineSelectedListener {
/** Called by ChannelsMenuFragment when a list item is selected */
public void onArticleSelected(int position);
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// We need to use a different list item layout for devices older than Honeycomb
int layout = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ?
android.R.layout.simple_list_item_activated_1 : android.R.layout.simple_list_item_2;
// Create an array adapter for the list view, using the AudioVideoChannelsList headlines array
setListAdapter(new ArrayAdapter<String>(getActivity(), layout, AudioVideoChannelsList.ChannelsList1));
}
@Override
public void onStart() {
super.onStart();
// When in two-pane layout, set the listview to highlight the selected list item
// (We do this during onStart because at the point the listview is available.)
if (getFragmentManager().findFragmentById(R.id.channels_fragment) != null) {
getListView().setChoiceMode(ListView.CHOICE_MODE_SINGLE);
}
}
final static String ARG_POSITION = "position";
int mCurrentPosition = -1;
public void updateListView(int pos)
{
if(pos==0)
{
int layout = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ?
android.R.layout.simple_list_item_activated_1 : android.R.layout.simple_list_item_2;
// Create an array adapter for the list view, using the AudioVideoChannelsList headlines array
setListAdapter(new ArrayAdapter<String>(getActivity(), layout, AudioVideoChannelsList.ChannelsList1));
}
else
{
int layout = Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB ?
android.R.layout.simple_list_item_activated_1 : android.R.layout.simple_list_item_2;
// Create an array adapter for the list view, using the AudioVideoChannelsList headlines array
setListAdapter(new ArrayAdapter<String>(getActivity(), layout, AudioVideoChannelsList.ChannelsList2));
}
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
// This makes sure that the container activity has implemented
// the callback interface. If not, it throws an exception.
try {
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnHeadlineSelectedListener");
}
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
// Notify the parent activity of selected item
// Set the item as checked to be highlighted when in two-pane layout
}
}
于 2013-01-07T10:43:19.083 に答える