根据我的列表视图，如何使用特定片段替换详细信息容器，或者根据所选项目的字符串名称而不是列表中项目的位置来启动特定活动？我正在寻找case string而不是case 0，case 1，case 2等内容。初始但代码建议不正确下的代码是类似于我正在寻找但不是正确的解决方案。所有的帮助将不胜感激。
字符串
<string-array name="continent_names">
//item 0 <item>@string/africa</item>
//item 1 <item>@string/asia</item>
//item 2 <item>@string/europe</item>
</string-array>
<string-array name="continent_descriptions">
//item 0 <item>@string/africa_description</item>
//item 1 <item>@string/asia_description </item>
//item 2 <item>@string/europe_description </item>
</string-array>
FragmentWorld.java
public class FragmentWorld extends ListFragment implements SearchView.OnQueryTextListener {
private WorldListAdapter mAdapter;
public FragmentWorld() {
// Required empty constructor
}
public static FragmentWorld newInstance() {
return new FragmentWorld();
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_world, container, false);
setHasOptionsMenu(true);
initialize(view);
return view;
}
List<World> list = new ArrayList<World>();
private void initialize(View view) {
String[] items = getActivity().getResources().getStringArray(R.array.continent_names);
String[] itemDescriptions = getActivity().getResources().getStringArray(R.array.continent_descriptions);
for (int n = 0; n < items.length; n++){
World world = new World();
world.setID();
world.setName(items[n]);
world.setDescription(itemDescriptions[n]);
list.add(world);
}
mAdapter = new WorldListAdapter(list, getActivity());
setListAdapter(mAdapter);
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// get the adapter, then get the name from the adapter at that position
WorldListAdapter adapter = (WorldListAdapter) parent.getAdapter();
String country = adapter.getItem(position);
if (mTwoPane) {
setItemNormal();
View rowView = view;
setItemSelected(rowView);
Fragment newFragment;
if (country.equals(view.getResources().getString(R.string.africa))) {
newFragment = new FragmentAfrica();
} else if (country.equals(view.getResources().getString(R.string.asia))) {
newFragment = new FragmentAsia();
} else if (country.equals(view.getResources().getString(R.string.europe))) {
newFragment = new FragmentEurope();
} else {
newFragment = new FragmentAfrica();
}
WorldActivity activity = (WorldActivity) view.getContext();
FragmentTransaction transaction = activity.getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.detail_container, newFragment);
transaction.commit();
} else {
Intent intent;
if (country.equals(view.getResources().getString(R.string.africa))) {
intent = new Intent(getActivity(), AfricaActivity.class);
} else if (country.equals(view.getResources().getString(R.string.asia))) {
intent = new Intent(getActivity(), AsiaActivity.class);
} else if (country.equals(view.getResources().getString(R.string.europe))) {
intent = new Intent(getActivity(), EuropeActivity.class);
} else {
intent = new Intent(getActivity(), AfricaActivity.class);
}
startActivity(intent);
}
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
// Set up search view
inflater.inflate(R.menu.menu_world, menu);
MenuItem item = menu.findItem(R.id.action_search);
SearchView searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setIconifiedByDefault(true);
searchView.clearAnimation();
searchView.setOnQueryTextListener(this);
searchView.setQueryHint(getResources().getString(R.string.search_hint));
View close = searchView.findViewById(R.id.search_close_btn);
close.setBackgroundResource(R.drawable.ic_action_content_clear);
}
@Override
public boolean onQueryTextSubmit(String newText) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
mAdapter.getFilter().filter(newText);
return false;
}
}
WorldListAdapter.java
public class WorldListAdapter extends BaseAdapter implements Filterable {
private List<World> mData;
private List<World> mFilteredData;
private LayoutInflater mInflater;
private ItemFilter mFilter;
public WorldListAdapter (List<World> data, Context context) {
mData = data;
mFilteredData = new ArrayList(mData);
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return mFilteredData.size();
}
@Override
public String getItem(int position) {
return mFilteredData.get(position).getName();
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item_dualline, parent, false);
holder = new ViewHolder();
holder.title = (TextView) convertView.findViewById(R.id.item_name);
holder.description = (TextView) convertView.findViewById(R.id.item_description);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.title.setText(mFilteredData.get(position).getName());
holder.description.setText(mFilteredData.get(position).getDescription());
return convertView;
}
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ItemFilter();
}
return mFilter;
}
/**
* View holder
*/
static class ViewHolder {
private TextView title;
private TextView description;
}
private class ItemFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults results = new FilterResults();
if (TextUtils.isEmpty(constraint)) {
results.count = mData.size();
results.values = new ArrayList(mData);
} else {
//Create a new list to filter on
List<World> resultList = new ArrayList<World>();
for (World str : mData) {
if (str.getName().toLowerCase().contains(constraint.toString().toLowerCase())) {
resultList.add(str);
}
}
results.count = resultList.size();
results.values = resultList;
}
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
if (results.count == 0) {
mFilteredData.clear();
notifyDataSetInvalidated();
} else {
mFilteredData = (ArrayList<World>)results.values;
notifyDataSetChanged();
}
}
}
}
初始但代码建议不正确
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
if (mTwoPane) {
setItemNormal();
View rowView = view;
setItemSelected(rowView);
Fragment newFragment;
switch (position) {
case 0:
newFragment = new FragmentAfrica();
break;
case 1:
newFragment = new FragmentAsia();
break;
case 2:
newFragment = new FragmentEurope();
break;
default:
newFragment = new FragmentAfrica();
break;
}
WorldActivity activity = (WorldActivity) view.getContext();
FragmentTransaction transaction = activity.getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.detail_container, newFragment);
transaction.commit();
} else {
Intent intent;
switch (position) {
case 0:
intent = new Intent(getActivity(), AfricaActivity.class);
break;
case 1:
intent = new Intent(getActivity(), AsiaActivity.class);
break;
case 2:
intent = new Intent(getActivity(), EuropeActivity.class);
break;
default:
intent = new Intent(getActivity(), AfricaActivity.class);
break;
}
startActivity(intent);
}
}
public void setItemSelected(View view) {
View rowView = view;
view.setBackgroundColor(Color.parseColor("#0099CC"));
TextView tv0 = (TextView) rowView.findViewById(R.id.item_name);
tv0.setTextColor(Color.parseColor("#FFFFFF"));
TextView tv1 = (TextView) rowView.findViewById(R.id.item_description);
tv1.setTextColor(Color.parseColor("#FFFFFF"));
}
public void setItemNormal() {
for (int i = 0; i < listView.getChildCount(); i++) {
View v = listView.getChildAt(i);
v.setBackgroundColor(Color.TRANSPARENT);
TextView tv0 = ((TextView) v.findViewById(R.id.item_name));
tv0.setTextColor(Color.WHITE);
TextView tv1 = ((TextView) v.findViewById(R.id.item_description));
tv1.setTextColor(Color.parseColor("#B5B5B5"));
}
}
});
答案 0 :(得分：1)
您要做的是从父级获取适配器，然后从适配器获取国家/地区名称。
试试这个：
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// get the adapter, then get the name from the adapter at that position
WorldListAdapter adapter = (WorldListAdapter) parent.getAdapter();
String country = adapter.getItem(position);
if (mTwoPane) {
setItemNormal();
View rowView = view;
setItemSelected(rowView);
Fragment newFragment;
if (country.equals(view.getResources().getString(R.string.africa))) {
newFragment = new FragmentAfrica();
} else if (country.equals(view.getResources().getString(R.string.asia))) {
newFragment = new FragmentAsia();
} else if (country.equals(view.getResources().getString(R.string.europe))) {
newFragment = new FragmentEurope();
} else {
newFragment = new FragmentAfrica();
}
WorldActivity activity = (WorldActivity) view.getContext();
FragmentTransaction transaction = activity.getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.detail_container, newFragment);
transaction.commit();
} else {
Intent intent;
if (country.equals(view.getResources().getString(R.string.africa))) {
intent = new Intent(getActivity(), AfricaActivity.class);
} else if (country.equals(view.getResources().getString(R.string.asia))) {
intent = new Intent(getActivity(), AsiaActivity.class);
} else if (country.equals(view.getResources().getString(R.string.europe))) {
intent = new Intent(getActivity(), EuropeActivity.class);
} else {
intent = new Intent(getActivity(), AfricaActivity.class);
}
startActivity(intent);
}
}
您也可以使用Raghav建议的switch语句字符串进行比较。