私のプログラムでは、マルチレベルのリストビューを表示していますが、別のアクティビティを呼び出すたびにフラグメント タブが表示されません。
私はこの素晴らしいチュートリアルを使用しています: http://www.androidbegin.com/tutorial/android-actionbarsherlock-viewpager-tabs-tutorial/
以下の画像、第 1 レベルのListViewを参照してください。
第 2 レベルのリストビュー:
ListCategoryFragment.xml:-
public class ListCategoryFragment extends SherlockFragment implements OnItemClickListener {
ListView lview3;
ListCategoryAdapter adapter;
private ArrayList<Object> itemList;
private ItemBean bean;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Get the view from fragmenttab1.xml
View view = inflater.inflate(R.layout.fragment_category_tab, container, false);
prepareArrayList();
lview3 = (ListView) view.findViewById(R.id.listView1);
adapter = new ListCategoryAdapter(getActivity(), itemList);
lview3.setAdapter(adapter);
lview3.setOnItemClickListener(this);
return view;
}
private static final int categoryFirst = 0;
private static final int categorySecond = 1;
private static final int categoryThird = 2;
public void onItemClick(AdapterView<?> arg0, View arg1, int position, long id) {
// Set up different intents based on the item clicked:
switch (position)
{
case categoryFirst:
Intent intent1 = new Intent(getActivity(), ListItemActivity.class);
intent1.putExtra("category", "Category - 1");
startActivity(intent1);
break;
case categorySecond:
Intent intent2 = new Intent(getActivity(), ListItemActivity.class);
intent2.putExtra("category", "Category - 2");
startActivity(intent2);
break;
case categoryThird:
Intent intent3 = new Intent(getActivity(), ListItemActivity.class);
intent3.putExtra("category", "Category - 3");
startActivity(intent3);
break;
default:
break;
}
}
public void prepareArrayList()
{
itemList = new ArrayList<Object>();
AddObjectToList("Category - 1");
AddObjectToList("Category - 2");
AddObjectToList("Category - 3");
}
// Add one item into the Array List
public void AddObjectToList(String title)
{
bean = new ItemBean();
bean.setTitle(title);
itemList.add(bean);
}
@Override
public void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
setUserVisibleHint(true);
}
}
ListItemActivity.java:-
public class ListItemActivity extends SherlockFragmentActivity {
static String URL = "http://www.site.url/tone.json";
static String KEY_CATEGORY = "item";
static final String KEY_TITLE = "title";
ListView list;
ListItemAdapter adapter;
/** Called when the activity is first created. */
@SuppressWarnings("deprecation")
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
getActionBar().setDisplayHomeAsUpEnabled(true);
setContentView(R.layout.activity_item_list);
final ArrayList<HashMap<String, String>> itemsList = new ArrayList<HashMap<String, String>>();
list = (ListView) findViewById(R.id.listView1);
adapter = new ListItemAdapter(this, itemsList);
list.setAdapter(adapter);
Bundle bdl = getIntent().getExtras();
KEY_CATEGORY = bdl.getString("category");
if (isNetworkAvailable()) {
new MyAsyncTask().execute();
} else {
AlertDialog alertDialog = new AlertDialog.Builder(ListItemActivity.this).create();
alertDialog.setMessage("The Internet connection appears to be offline.");
alertDialog.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
alertDialog.show();
}
}
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
private Intent getDefaultShareIntent(){
Intent intent = new Intent(Intent.ACTION_SEND);
intent.setType("text/plain");
intent.putExtra(Intent.EXTRA_SUBJECT, "SUBJECT");
intent.putExtra(Intent.EXTRA_TEXT, "TEXT");
startActivity(Intent.createChooser(intent, "Share via"));
return intent;
}
/** The event listener for the Up navigation selection */
@Override
public boolean onOptionsItemSelected(com.actionbarsherlock.view.MenuItem item) {
switch(item.getItemId())
{
case android.R.id.home:
finish();
break;
case R.id.menu_item_share:
getDefaultShareIntent();
break;
}
return true;
}
private boolean isNetworkAvailable() {
ConnectivityManager cm = (ConnectivityManager) getSystemService(CONNECTIVITY_SERVICE);
NetworkInfo info = cm.getActiveNetworkInfo();
return (info != null);
}
class MyAsyncTask extends
AsyncTask<String, Integer, ArrayList<HashMap<String, String>>> {
private ProgressDialog progressDialog = new ProgressDialog(
ListItemActivity.this);
@Override
protected void onPreExecute() {
progressDialog.setMessage("Loading, Please wait.....");
progressDialog.show();
}
final ArrayList<HashMap<String, String>> itemsList = new ArrayList<HashMap<String, String>>();
@Override
protected ArrayList<HashMap<String, String>> doInBackground(
String... params) {
HttpClient client = new DefaultHttpClient();
// Perform a GET request for a JSON list
HttpUriRequest request = new HttpGet(URL);
// Get the response that sends back
HttpResponse response = null;
try {
response = client.execute(request);
} catch (ClientProtocolException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Convert this response into a readable string
String jsonString = null;
try {
jsonString = StreamUtils.convertToString(response.getEntity()
.getContent());
} catch (IllegalStateException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
// Create a JSON object that we can use from the String
JSONObject json = null;
try {
json = new JSONObject(jsonString);
} catch (JSONException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
JSONArray jsonArray = json.getJSONArray(KEY_CATEGORY);
for (int i = 0; i < jsonArray.length(); i++) {
HashMap<String, String> map = new HashMap<String, String>();
JSONObject jsonObject = jsonArray.getJSONObject(i);
map.put("id", String.valueOf(i));
map.put(KEY_TITLE, jsonObject.getString(KEY_TITLE));
itemsList.add(map);
}
return itemsList;
} catch (JSONException e) {
Log.e("log_tag", "Error parsing data " + e.toString());
}
return null;
}
@Override
protected void onPostExecute(ArrayList<HashMap<String, String>> result) {
list = (ListView) findViewById(R.id.listView1);
adapter = new ListItemAdapter(ListItemActivity.this, itemsList);
list.setAdapter(adapter);
TextView lblTitle = (TextView) findViewById(R.id.text);
lblTitle.setText(KEY_CATEGORY);
this.progressDialog.dismiss();
list.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
HashMap<String, String> map = itemsList.get(position);
Intent in = new Intent(ListItemActivity.this, ListItemDetailActivity.class);
in.putExtra(KEY_TITLE, map.get(KEY_TITLE));
startActivity(in);
}
});
}
}
}