我正在为我的教会编写一个使用带有Tabs +滑动导航的ListFragments的应用程序。如果我只有tab / listfragment，它显示就好了。但是，如果我有多个选项卡，则每个ListFragments中的列表与最后一个片段的列表相同。例如，如果有选项卡/列表碎片Alpha，Beta，Gamma和Delta，则每个ListFragment将包含为Gamma指定的数组列表。
这是我的代码：
MainActivity.java
public class MainActivity extends SherlockFragmentActivity implements
ActionBar.TabListener {
// The context used for the Updater class
public static Context context;
PagerAdapter pagerAdapter;
/*
* I'm not entirely sure what this does, but it's key in implementing the
* tab/swiping navigation. See documentation here:
* http://developer.android.com
* /reference/android/support/v4/view/ViewPager.html
*/
ViewPager viewPager;
// The AsyncTask class Updater
public static Updater updater;
public static ProgressDialog pd = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
context = getApplicationContext();
// Sets up tabs
pagerAdapter = new PagerAdapter(getSupportFragmentManager());
final ActionBar actionBar = getSupportActionBar();
actionBar.setHomeButtonEnabled(false);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
viewPager = (ViewPager) findViewById(R.id.pager);
viewPager.setAdapter(pagerAdapter);
// The method is called when a tab is clicked or the user swipes.
viewPager
.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
@Override
public void onPageSelected(int position) {
actionBar.setSelectedNavigationItem(position);
}
});
// Creates tabs
actionBar.addTab(actionBar.newTab().setText("Life")
.setTabListener(this), true);
actionBar.addTab(actionBar.newTab().setText("Ministries")
.setTabListener(this));
actionBar.addTab(actionBar.newTab().setText("About")
.setTabListener(this));
/*actionBar.addTab(actionBar.newTab().setText("Contact")
.setTabListener(this));*/
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater menuInflater = getSupportMenuInflater();
menuInflater.inflate(R.menu.activity_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_settings:
Intent intent = new Intent(this, SettingsActivity.class);
startActivity(intent);
return true;
default:
return super.onOptionsItemSelected(item);
}
}
// Called when a tab is selected.
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
PagerAdapter.java
public class PagerAdapter extends FragmentPagerAdapter {
public PagerAdapter(FragmentManager fm) {
super(fm);
// TODO Auto-generated constructor stub
}
/* Returns the correct fragment for each tab. */
@Override
public Fragment getItem(int i) {
Fragment returnFrag = null;
Log.i("test", Integer.toString(i));
switch (i) {
case 0:
returnFrag = new LifeFragment();
case 1:
returnFrag = new MinistriesFragment();
case 2:
returnFrag = new AboutFragment();
// case 3:
// returnFrag = new ContactFragment();
}
return returnFrag;
}
// I'm not quite sure why this method is here.
@Override
public int getCount() {
return 4;
}
}
LifeFragment.java
public class LifeFragment extends SherlockListFragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
/* Inflates view */
View lifeView = inflater.inflate(R.layout.fragment_list, container,
false);
return lifeView;
}
@Override
public void onResume() {
/*
* The code below lists the options available under the "Life" tab. I'm
* not sure why, but these have to go in the onResume() method.
*/
/*
* Specifies the array in the resources to get the array of option names
* and the layout that the list is patterned after.
*/
setListAdapter(ArrayAdapter.createFromResource(MainActivity.context,
R.array.lifeList, R.layout.fragment_list_item));
// Creates the actual list view
ListView listView = getListView();
// Disables searching through the list
listView.setTextFilterEnabled(false);
// The method called when a list item is clicked
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// The intent to switch to
Intent intent = null;
switch ((int) id) {
case 0:
intent = new Intent(MainActivity.context,
NewsActivity.class);
break;
case 1:
intent = new Intent(MainActivity.context,
DailyScriptureActivity.class);
break;
case 2:
intent = new Intent(MainActivity.context,
PrayerRequestActivity.class);
break;
case 3:
intent = new Intent(MainActivity.context,
SermonActivity.class);
break;
case 4:
intent = new Intent(MainActivity.context, WebActivity.class);
intent.putExtra("type", "payload");
// Getting data
dbAdapter dba = new dbAdapter(MainActivity.context);
dba.open();
Cursor cursor = dba.read("html_info", null, null);
while(cursor.moveToNext()) {
if(cursor.getString(cursor.getColumnIndex("name")).equals("Plan-Of-Salvation")) {
break;
}
}
intent.putExtra("data", cursor.getString(cursor.getColumnIndex("html")));
intent.putExtra("title", "Plan Of Salvation");
break;
}
startActivity(intent);
}
});
super.onResume();
}
}
MinistriesFragment.java
public class MinistriesFragment extends SherlockListFragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
/* Inflates view */
View lifeView = inflater.inflate(R.layout.fragment_list, container,
false);
return lifeView;
}
/*
* The method below lists the options available under the "Ministries" tab.
*/
@Override
public void onResume() {
/*
* Specifies the array in the resources to get the array of option names
* and the layout that the list is patterned after.
*/
setListAdapter(ArrayAdapter.createFromResource(MainActivity.context,
R.array.ministriesList, R.layout.fragment_list_item));
// Creates the actual list view
ListView listView = getListView();
// Disables searching through the list
listView.setTextFilterEnabled(false);
// The method called when a list item is clicked
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// The intent to switch to
Intent intent = new Intent(MainActivity.context,
WebActivity.class);
Cursor cursor = null;
String where = null;
dbAdapter dba = new dbAdapter(MainActivity.context);
dba.open();
/*
* This switch helps generate the "where" statement for the DB
* query
*/
switch ((int) id) {
case 0:
where = "childhood";
break;
case 1:
where = "royal-ambassadors";
break;
case 2:
where = "upward";
break;
case 3:
where = "high-school";
break;
case 4:
where = "acteens";
break;
case 5:
where = "MOPS";
break;
case 6:
where = "senior-adults";
break;
case 7:
where = "WMU";
break;
case 8:
where = "recreation";
break;
case 9:
where = "media-centers";
break;
}
cursor = dba.read("html_info", new String[] { "html" },
"'name'='" + where + "'");
cursor.moveToFirst();
intent.putExtra("type", "payload");
intent.putExtra("data",
cursor.getString(cursor.getColumnIndex("html")));
intent.putExtra(
"title",
getResources().getStringArray(R.array.ministriesList)[(int) id]);
startActivity(intent);
cursor.close();
dba.close();
}
});
super.onResume();
}
}
AboutFragment.java
public class AboutFragment extends SherlockListFragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
/* Inflates view */
View aboutView = inflater.inflate(R.layout.fragment_list, container,
false);
return aboutView;
}
@Override
public void onResume() {
/*
* The code below lists the options available under the "Life" tab. I'm
* not sure why, but these have to go in the onResume() method.
*/
/*
* Specifies the array in the resources to get the array of option names
* and the layout that the list is patterned after.
*/
setListAdapter(ArrayAdapter.createFromResource(MainActivity.context,
R.array.aboutList, R.layout.fragment_list_item));
// Creates the actual list view
ListView listView = getListView();
// Disables searching through the list
listView.setTextFilterEnabled(false);
// The method called when a list item is clicked
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
// The intent to switch to
Intent intent = null;
dbAdapter dba = new dbAdapter(MainActivity.context);
dba.open();
switch ((int) id) {
case 0:
intent = new Intent(MainActivity.context, WebActivity.class);
Cursor serviceCursor = dba.read("html_info",
new String[] { "html" }, "'name'='services'");
serviceCursor.moveToFirst();
String serviceHtml = serviceCursor.getString(serviceCursor
.getColumnIndex("html"));
serviceCursor.close();
intent.putExtra("type", "payload");
intent.putExtra("data", serviceHtml);
break;
case 1:
intent = new Intent(MainActivity.context,
SundaySchoolActivity.class);
break;
case 2:
intent = new Intent(MainActivity.context, WebActivity.class);
Cursor wednesdayCursor = dba.read("html_info",
new String[] { "html" }, "'name'='wednesdays'");
wednesdayCursor.moveToFirst();
String wednesdayHtml = wednesdayCursor
.getString(wednesdayCursor.getColumnIndex("html"));
wednesdayCursor.close();
intent.putExtra("type", "payload");
intent.putExtra("data", wednesdayHtml);
break;
case 3:
intent = new Intent(
android.content.Intent.ACTION_VIEW,
Uri.parse("google.navigation:q=Lakeside+Baptist+Church,+2865+Old+Rocky+Ridge+Road,+Birmingham,+AL+35243"));
break;
case 4:
intent = new Intent(MainActivity.context,
BlogActivity.class);
break;
case 5:
intent = new Intent(MainActivity.context, WebActivity.class);
Cursor feedCursor = dba.read("html_info",
new String[] { "html" }, "'name'='wednesdays'");
feedCursor.moveToFirst();
String feedHtml = feedCursor.getString(feedCursor
.getColumnIndex("html"));
feedCursor.close();
intent.putExtra("type", "payload");
intent.putExtra("data", feedHtml);
break;
case 6:
intent = new Intent(MainActivity.context, WebActivity.class);
Cursor historyCursor = dba.read("html_info",
new String[] { "html" }, "'name'='wednesdays'");
historyCursor.moveToFirst();
String historyHtml = historyCursor.getString(historyCursor
.getColumnIndex("html"));
historyCursor.close();
intent.putExtra("type", "payload");
intent.putExtra("data", historyHtml);
break;
}
/*
* Adding the title to every intent, whether it is needed or
* not.
*/
intent.putExtra(
"title",
getResources().getStringArray(R.array.aboutList)[(int) id]);
startActivity(intent);
dba.close();
}
});
super.onResume();
}
}
fragment_list.xml
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</FrameLayout>
fragment_list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@android:id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:linksClickable="true"
android:padding="10dp"
android:text="Value"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="#000000" />
activity_main.xml中
<android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
提前感谢您的帮助！ ：）
答案 0 :(得分：0)
我不太确定区别是什么，但我通过PagerAdapter代码更改为使用片段列表而不是交换机。现在，该应用程序运行良好：D
public class PagerAdapter extends FragmentPagerAdapter {
public PagerAdapter(FragmentManager fm) {
super(fm);
// TODO Auto-generated constructor stub
}
private List<SherlockListFragment> fragList = Arrays.asList(
new LifeFragment(), new MinistriesFragment(), new AboutFragment(),
new ContactFragment());
/* Returns the correct fragment for each tab. */
@Override
public Fragment getItem(int i) {
return fragList.get(i);
}
// I'm not quite sure why this method is here.
@Override
public int getCount() {
return 4;
}
}