【发布时间】：2015-03-15 05:09:46
【问题描述】：
我正在制作一个安卓应用程序。我正在使用导航抽屉，我使用导航抽屉充气的一些片段包含选项卡布局，有些是带有 textview 的普通片段。
我面临 2 个问题，当
我正在打开带有标签的导航抽屉项目，之后它会自动将这些标签保留在视图中，即使对于没有标签的片段也是如此。
当我第二次或更多次使用标签打开片段时。它复制标签。我的意思是，如果第一次没有选项卡是 3，那么下次我打开片段时，没有。的标签加倍。
带有导航抽屉的活动
public class MainFeedActivity extends FragmentActivity {
public DrawerLayout mDrawerLayout;
private ListView mDrawerList;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
private String[] mDrawertitles;
LinearLayout drawerll;
String username;
TextView t;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_mainfeed);
username = getIntent().getExtras().getString("username").toString();
t = (TextView) findViewById(R.id.drawer_uname_tv);
t.setText(username);
mTitle = mDrawerTitle = getTitle();
mDrawertitles = getResources().getStringArray(R.array.array);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
mDrawerList = (ListView) findViewById(R.id.left_drawer);
drawerll = (LinearLayout) findViewById(R.id.drawerll);
// set a custom shadow that overlays the main content when the drawer
// opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
mDrawerList.setAdapter(new ArrayAdapter<String>(this,
R.layout.drawer_list_item, mDrawertitles));
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
getActionBar().setDisplayHomeAsUpEnabled(true);
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open,
R.string.drawer_close) {
public void onDrawerClosed(View view) {
getActionBar().setTitle(mTitle);
invalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView) {
getActionBar().setTitle(mDrawerTitle);
invalidateOptionsMenu(); // creates call to
// onPrepareOptionsMenu()
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(2);
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// The action bar home/up action should open or close the drawer.
// ActionBarDrawerToggle will take care of this.
if (mDrawerToggle.onOptionsItemSelected(item)) {
return true;
}
return true;
}
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
selectItem(position);
}
}
private void selectItem(int position) {
if (position == 0) {
Fragment fragment = new Home();
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.content_frame, fragment).commit();
mDrawerList.setItemChecked(position, true);
mDrawerLayout.closeDrawer(drawerll);
}
else if (position == 1) {
Fragment fragment = new Statistics();
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.content_frame, fragment).commit();
// update selected item and title, then close the drawer
mDrawerList.setItemChecked(position, true);
mDrawerLayout.closeDrawer(drawerll);
} else {
Fragment fragment = new Help();
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction()
.replace(R.id.content_frame, fragment).commit();
// update selected item and title, then close the drawer
mDrawerLayout.closeDrawer(drawerll);
}
}
/*
*
* protected boolean isOnline() { ConnectivityManager cm =
* (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
* NetworkInfo netInfo = cm.getActiveNetworkInfo(); if (netInfo != null &&
* netInfo.isConnectedOrConnecting()) { return true; } else { return false;
* } }
*/
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getActionBar().setTitle(mTitle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
mDrawerToggle.onConfigurationChanged(newConfig);
}
/**
* Fragment that appears in the "content_frame", shows a planet
*/
}
片段
public class Home extends Fragment {
ActionBar.Tab Tab1, Tab2, Tab3;
Fragment fragmentTab1 = new Connected();
Fragment fragmentTab2 = new Disconnected();
Fragment fragmentTab3 = new AllDevices();
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_tabs, container, false);
ActionBar actionBar = getActivity().getActionBar();
actionBar.setDisplayShowHomeEnabled(true);
// Hide Actionbar Title
actionBar.setDisplayShowTitleEnabled(true);
// Create Actionbar Tabs
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
Tab1 = actionBar.newTab().setText("Tab1");
Tab2 = actionBar.newTab().setText("Tab2");
Tab3 = actionBar.newTab().setText("Tab3");
Tab1.setTabListener(new TabListener(fragmentTab1));
Tab2.setTabListener(new TabListener(fragmentTab2));
Tab3.setTabListener(new TabListener(fragmentTab3));
actionBar.addTab(Tab1);
actionBar.addTab(Tab2);
actionBar.addTab(Tab3);
return view;
}
}
片段：
public class Help extends Fragment {
Button b;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.help, container, false);
setHasOptionsMenu(false);
return rootView;
}
}
【问题讨论】：
-
当position!= 1时，需要改变actionBar Navigation Mode....stackoverflow.com/questions/16298930/…
-
感谢@RafiduzzamanSonnet，第一个问题解决了
-
你能建议第二个问题的解决方案吗？
标签： android android-layout android-fragments tabs navigation