Problem mit TabHost

1package com.example.app;
2
3import android.app.Activity;
4import android.support.v7.app.ActionBarActivity;
5import android.support.v7.app.ActionBar;
6import android.support.v4.app.Fragment;
7import android.support.v4.app.FragmentManager;
8import android.content.Context;
9import android.os.Build;
10import android.os.Bundle;
11import android.view.Gravity;
12import android.view.LayoutInflater;
13import android.view.Menu;
14import android.view.MenuItem;
15import android.view.View;
16import android.view.ViewGroup;
17import android.support.v4.widget.DrawerLayout;
18import android.widget.ArrayAdapter;
19import android.widget.TextView;
20
21public class MainActivity extends ActionBarActivity implements NavigationDrawerFragment.NavigationDrawerCallbacks {
22
23 /**
24 * Fragment managing the behaviors, interactions and presentation of the navigation drawer.
25 */
26 private NavigationDrawerFragment mNavigationDrawerFragment;
27
28 /**
29 * Used to store the last screen title. For use in {@link #restoreActionBar()}.
30 */
31 private CharSequence mTitle;
32
33 @Override
34 protected void onCreate(Bundle savedInstanceState) {
35 super.onCreate(savedInstanceState);
36 setContentView(R.layout.activity_main);
37
38 mNavigationDrawerFragment = (NavigationDrawerFragment)
39 getSupportFragmentManager().findFragmentById(R.id.navigation_drawer);
40 mTitle = getTitle();
41
42 // Set up the drawer.
43 mNavigationDrawerFragment.setUp(
44 R.id.navigation_drawer,
45 (DrawerLayout) findViewById(R.id.drawer_layout));
46 }
47
48 @Override
49 public void onNavigationDrawerItemSelected(int position) {
50 // update the main content by replacing fragments
51 Fragment fragment = null;
52
53 if(position != 2)
54 fragment = PlaceholderFragment.newInstance(position + 1);
55 else
56 fragment = new TabHostFragment();
57 FragmentManager fragmentManager = getSupportFragmentManager();
58 fragmentManager.beginTransaction()
59 .replace(R.id.container, fragment)
60 .commit();
61 }
62
63 public void onSectionAttached(int number) {
64 switch (number) {
65 case 1:
66 mTitle = getString(R.string.title_section1);
67 break;
68 case 2:
69 mTitle = getString(R.string.title_section2);
70 break;
71 case 3:
72 mTitle = getString(R.string.title_section3);
73 break;
74 }
75 }
76
77 public void restoreActionBar() {
78 ActionBar actionBar = getSupportActionBar();
79 actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
80 actionBar.setDisplayShowTitleEnabled(true);
81 actionBar.setTitle(mTitle);
82 }
83
84
85 @Override
86 public boolean onCreateOptionsMenu(Menu menu) {
87 if (!mNavigationDrawerFragment.isDrawerOpen()) {
88 // Only show items in the action bar relevant to this screen
89 // if the drawer is not showing. Otherwise, let the drawer
90 // decide what to show in the action bar.
91 getMenuInflater().inflate(R.menu.main, menu);
92 restoreActionBar();
93 return true;
94 }
95 return super.onCreateOptionsMenu(menu);
96 }
97
98 @Override
99 public boolean onOptionsItemSelected(MenuItem item) {
100 // Handle action bar item clicks here. The action bar will
101 // automatically handle clicks on the Home/Up button, so long
102 // as you specify a parent activity in AndroidManifest.xml.
103 int id = item.getItemId();
104 if (id == R.id.action_settings) {
105 return true;
106 }
107 return super.onOptionsItemSelected(item);
108 }
109
110 /**
111 * A placeholder fragment containing a simple view.
112 */
113 public static class PlaceholderFragment extends Fragment {
114 /**
115 * The fragment argument representing the section number for this
116 * fragment.
117 */
118 private static final String ARG_SECTION_NUMBER = "section_number";
119
120 /**
121 * Returns a new instance of this fragment for the given section
122 * number.
123 */
124 public static PlaceholderFragment newInstance(int sectionNumber) {
125 PlaceholderFragment fragment = new PlaceholderFragment();
126 Bundle args = new Bundle();
127 args.putInt(ARG_SECTION_NUMBER, sectionNumber);
128 fragment.setArguments(args);
129 return fragment;
130 }
131
132 public PlaceholderFragment() {
133 }
134
135 @Override
136 public View onCreateView(LayoutInflater inflater, ViewGroup container,
137 Bundle savedInstanceState) {
138 View rootView = inflater.inflate(R.layout.fragment_main, container, false);
139 TextView textView = (TextView) rootView.findViewById(R.id.section_label);
140 textView.setText(Integer.toString(getArguments().getInt(ARG_SECTION_NUMBER)));
141 return rootView;
142 }
143
144 @Override
145 public void onAttach(Activity activity) {
146 super.onAttach(activity);
147 ((MainActivity) activity).onSectionAttached(
148 getArguments().getInt(ARG_SECTION_NUMBER));
149 }
150 }
151
152}

1package com.example.app;
2
3import android.support.v7.app.ActionBarActivity;;
4import android.app.Activity;
5import android.support.v7.app.ActionBar;
6import android.support.v4.app.Fragment;
7import android.support.v4.app.ActionBarDrawerToggle;
8import android.support.v4.view.GravityCompat;
9import android.support.v4.widget.DrawerLayout;
10import android.content.SharedPreferences;
11import android.content.res.Configuration;
12import android.os.Bundle;
13import android.preference.PreferenceManager;
14import android.view.LayoutInflater;
15import android.view.Menu;
16import android.view.MenuInflater;
17import android.view.MenuItem;
18import android.view.View;
19import android.view.ViewGroup;
20import android.widget.AdapterView;
21import android.widget.ArrayAdapter;
22import android.widget.ListView;
23import android.widget.Toast;
24
25public class NavigationDrawerFragment extends Fragment {
26
27 /**
28 * Remember the position of the selected item.
29 */
30 private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position";
31
32 /**
33 * Per the design guidelines, you should show the drawer on launch until the user manually
34 * expands it. This shared preference tracks this.
35 */
36 private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned";
37
38 /**
39 * A pointer to the current callbacks instance (the Activity).
40 */
41 private NavigationDrawerCallbacks mCallbacks;
42
43 /**
44 * Helper component that ties the action bar to the navigation drawer.
45 */
46 private ActionBarDrawerToggle mDrawerToggle;
47
48 private DrawerLayout mDrawerLayout;
49 private ListView mDrawerListView;
50 private View mFragmentContainerView;
51
52 private int mCurrentSelectedPosition = 0;
53 private boolean mFromSavedInstanceState;
54 private boolean mUserLearnedDrawer;
55
56 public NavigationDrawerFragment() {
57 }
58
59 @Override
60 public void onCreate(Bundle savedInstanceState) {
61 super.onCreate(savedInstanceState);
62
63 // Read in the flag indicating whether or not the user has demonstrated awareness of the
64 // drawer. See PREF_USER_LEARNED_DRAWER for details.
65 SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity());
66 mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false);
67
68 if (savedInstanceState != null) {
69 mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION);
70 mFromSavedInstanceState = true;
71 }
72
73 // Select either the default item (0) or the last selected item.
74 selectItem(mCurrentSelectedPosition);
75 }
76
77 @Override
78 public void onActivityCreated (Bundle savedInstanceState) {
79 super.onActivityCreated(savedInstanceState);
80 // Indicate that this fragment would like to influence the set of actions in the action bar.
81 setHasOptionsMenu(true);
82 }
83
84 @Override
85 public View onCreateView(LayoutInflater inflater, ViewGroup container,
86 Bundle savedInstanceState) {
87 mDrawerListView = (ListView) inflater.inflate(
88 R.layout.fragment_navigation_drawer, container, false);
89 mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
90 @Override
91 public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
92 selectItem(position);
93 }
94 });
95 mDrawerListView.setAdapter(new ArrayAdapter<String>(
96 getActionBar().getThemedContext(),
97 android.R.layout.simple_list_item_activated_1,
98 android.R.id.text1,
99 new String[]{
100 getString(R.string.title_section1),
101 getString(R.string.title_section2),
102 getString(R.string.title_section3),
103 }));
104 mDrawerListView.setItemChecked(mCurrentSelectedPosition, true);
105 return mDrawerListView;
106 }
107
108 public boolean isDrawerOpen() {
109 return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView);
110 }
111
112 /**
113 * Users of this fragment must call this method to set up the navigation drawer interactions.
114 *
115 * @param fragmentId The android:id of this fragment in its activity's layout.
116 * @param drawerLayout The DrawerLayout containing this fragment's UI.
117 */
118 public void setUp(int fragmentId, DrawerLayout drawerLayout) {
119 mFragmentContainerView = getActivity().findViewById(fragmentId);
120 mDrawerLayout = drawerLayout;
121
122 // set a custom shadow that overlays the main content when the drawer opens
123 mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START);
124 // set up the drawer's list view with items and click listener
125
126 ActionBar actionBar = getActionBar();
127 actionBar.setDisplayHomeAsUpEnabled(true);
128 actionBar.setHomeButtonEnabled(true);
129
130 // ActionBarDrawerToggle ties together the the proper interactions
131 // between the navigation drawer and the action bar app icon.
132 mDrawerToggle = new ActionBarDrawerToggle(
133 getActivity(), /* host Activity */
134 mDrawerLayout, /* DrawerLayout object */
135 R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */
136 R.string.navigation_drawer_open, /* "open drawer" description for accessibility */
137 R.string.navigation_drawer_close /* "close drawer" description for accessibility */
138 ) {
139 @Override
140 public void onDrawerClosed(View drawerView) {
141 super.onDrawerClosed(drawerView);
142 if (!isAdded()) {
143 return;
144 }
145
146 getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
147 }
148
149 @Override
150 public void onDrawerOpened(View drawerView) {
151 super.onDrawerOpened(drawerView);
152 if (!isAdded()) {
153 return;
154 }
155
156 if (!mUserLearnedDrawer) {
157 // The user manually opened the drawer; store this flag to prevent auto-showing
158 // the navigation drawer automatically in the future.
159 mUserLearnedDrawer = true;
160 SharedPreferences sp = PreferenceManager
161 .getDefaultSharedPreferences(getActivity());
162 sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply();
163 }
164
165 getActivity().supportInvalidateOptionsMenu(); // calls onPrepareOptionsMenu()
166 }
167 };
168
169 // If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer,
170 // per the navigation drawer design guidelines.
171 if (!mUserLearnedDrawer && !mFromSavedInstanceState) {
172 mDrawerLayout.openDrawer(mFragmentContainerView);
173 }
174
175 // Defer code dependent on restoration of previous instance state.
176 mDrawerLayout.post(new Runnable() {
177 @Override
178 public void run() {
179 mDrawerToggle.syncState();
180 }
181 });
182
183 mDrawerLayout.setDrawerListener(mDrawerToggle);
184 }
185
186 private void selectItem(int position) {
187 mCurrentSelectedPosition = position;
188 if (mDrawerListView != null) {
189 mDrawerListView.setItemChecked(position, true);
190 }
191 if (mDrawerLayout != null) {
192 mDrawerLayout.closeDrawer(mFragmentContainerView);
193 }
194 if (mCallbacks != null) {
195 mCallbacks.onNavigationDrawerItemSelected(position);
196 }
197 }
198
199 @Override
200 public void onAttach(Activity activity) {
201 super.onAttach(activity);
202 try {
203 mCallbacks = (NavigationDrawerCallbacks) activity;
204 } catch (ClassCastException e) {
205 throw new ClassCastException("Activity must implement NavigationDrawerCallbacks.");
206 }
207 }
208
209 @Override
210 public void onDetach() {
211 super.onDetach();
212 mCallbacks = null;
213 }
214
215 @Override
216 public void onSaveInstanceState(Bundle outState) {
217 super.onSaveInstanceState(outState);
218 outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition);
219 }
220
221 @Override
222 public void onConfigurationChanged(Configuration newConfig) {
223 super.onConfigurationChanged(newConfig);
224 // Forward the new configuration the drawer toggle component.
225 mDrawerToggle.onConfigurationChanged(newConfig);
226 }
227
228 @Override
229 public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
230 // If the drawer is open, show the global app actions in the action bar. See also
231 // showGlobalContextActionBar, which controls the top-left area of the action bar.
232 if (mDrawerLayout != null && isDrawerOpen()) {
233 inflater.inflate(R.menu.global, menu);
234 showGlobalContextActionBar();
235 }
236 super.onCreateOptionsMenu(menu, inflater);
237 }
238
239 @Override
240 public boolean onOptionsItemSelected(MenuItem item) {
241 if (mDrawerToggle.onOptionsItemSelected(item)) {
242 return true;
243 }
244
245 if (item.getItemId() == R.id.action_example) {
246 Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT).show();
247 return true;
248 }
249
250 return super.onOptionsItemSelected(item);
251 }
252
253 /**
254 * Per the navigation drawer design guidelines, updates the action bar to show the global app
255 * 'context', rather than just what's in the current screen.
256 */
257 private void showGlobalContextActionBar() {
258 ActionBar actionBar = getActionBar();
259 actionBar.setDisplayShowTitleEnabled(true);
260 actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
261 actionBar.setTitle(R.string.app_name);
262 }
263
264 private ActionBar getActionBar() {
265 return ((ActionBarActivity) getActivity()).getSupportActionBar();
266 }
267
268 /**
269 * Callbacks interface that all activities using this fragment must implement.
270 */
271 public static interface NavigationDrawerCallbacks {
272 /**
273 * Called when an item in the navigation drawer is selected.
274 */
275 void onNavigationDrawerItemSelected(int position);
276 }
277}

1package com.example.app;
2
3import android.support.v4.app.Fragment;
4import android.os.Bundle;
5import android.support.v4.view.ViewPager;
6import android.view.LayoutInflater;
7import android.view.View;
8import android.view.ViewGroup;
9import android.widget.TabHost;
10
11import java.util.ArrayList;
12import java.util.List;
13
14/**
15 * Created by Michael on 17.01.14.
16 */
17public class TabHostFragment extends Fragment implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener {
18
19 MyPageAdapter pageAdapter;
20 private ViewPager mViewPager;
21 private TabHost mTabHost;
22
23 @Override
24 public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
25 View view = inflater.inflate(R.layout.fragment_tabhost, container, false);
26
27 mViewPager = (ViewPager) view.findViewById(R.id.viewpager);
28
29 // Tab Initialization
30 initialiseTabHost(view);
31
32 // Fragments and ViewPager Initialization
33 List<Fragment> fragments = getFragments();
34 pageAdapter = new MyPageAdapter(getActivity().getSupportFragmentManager(), fragments);
35 mViewPager.setAdapter(pageAdapter);
36 mViewPager.setOnPageChangeListener(this);
37
38 return view;
39 }
40
41 @Override
42 public void onDestroy() {
43 super.onDestroy();
44 }
45
46 // Method to add a TabHost
47 private static void AddTab(MainActivity activity, TabHost tabHost, TabHost.TabSpec tabSpec) {
48 tabSpec.setContent(new MyTabFactory(activity));
49 tabHost.addTab(tabSpec);
50 }
51
52 // Manages the Tab changes, synchronizing it with Pages
53 public void onTabChanged(String tag) {
54 int pos = this.mTabHost.getCurrentTab();
55 this.mViewPager.setCurrentItem(pos);
56 }
57
58 @Override
59 public void onPageScrollStateChanged(int arg0) {
60 }
61
62 // Manages the Page changes, synchronizing it with Tabs
63 @Override
64 public void onPageScrolled(int arg0, float arg1, int arg2) {
65 int pos = this.mViewPager.getCurrentItem();
66 this.mTabHost.setCurrentTab(pos);
67 }
68
69 @Override
70 public void onPageSelected(int arg0) {
71 }
72
73 private List<Fragment> getFragments(){
74 List<Fragment> fList = new ArrayList<Fragment>();
75
76 Fragment f1 = MainActivity.PlaceholderFragment.newInstance(0);
77 Fragment f2 = MainActivity.PlaceholderFragment.newInstance(1);
78 Fragment f3 = MainActivity.PlaceholderFragment.newInstance(2);
79 fList.add(f1);
80 fList.add(f2);
81 fList.add(f3);
82
83 return fList;
84 }
85
86 // Tabs Creation
87 private void initialiseTabHost(View view) {
88 mTabHost = (TabHost) view.findViewById(android.R.id.tabhost);
89 mTabHost.setup();
90
91 // TODO Put here your Tabs
92 AddTab((MainActivity) getActivity(), mTabHost, mTabHost.newTabSpec("Tab1").setIndicator("Tab1"));
93 AddTab((MainActivity) getActivity(), mTabHost, mTabHost.newTabSpec("Tab2").setIndicator("Tab2"));
94 AddTab((MainActivity) getActivity(), mTabHost, mTabHost.newTabSpec("Tab3").setIndicator("Tab3"));
95
96 mTabHost.setOnTabChangedListener(this);
97 }
98}

1package com.example.app;
2
3/**
4 * Created by Michael on 17.01.14.
5 */
6import android.content.Context;
7import android.view.View;
8import android.widget.TabHost.TabContentFactory;
9
10public class MyTabFactory implements TabContentFactory {
11
12 private final Context mContext;
13
14 public MyTabFactory(Context context) {
15 mContext = context;
16 }
17
18 public View createTabContent(String tag) {
19 View v = new View(mContext);
20 v.setMinimumWidth(0);
21 v.setMinimumHeight(0);
22 return v;
23 }
24}

1package com.example.app;
2
3/**
4 * Created by Michael on 17.01.14.
5 */
6
7import java.util.List;
8import android.support.v4.app.Fragment;
9import android.support.v4.app.FragmentManager;
10import android.support.v4.app.FragmentPagerAdapter;
11
12public class MyPageAdapter extends FragmentPagerAdapter {
13 private List<Fragment> fragments;
14
15 public MyPageAdapter(FragmentManager fm, List<Fragment> fragments) {
16 super(fm);
17 this.fragments = fragments;
18 }
19
20 @Override
21 public Fragment getItem(int position) {
22 return this.fragments.get(position);
23 }
24
25 @Override
26 public int getCount() {
27 return this.fragments.size();
28 }
29}

1<LinearLayout xmlns:android="SPAMSCHUTZ://schemas.android.com/apk/res/android"
2 xmlns:tools="SPAMSCHUTZ://schemas.android.com/tools"
3 android:layout_width="match_parent"
4 android:layout_height="match_parent"
5 tools:context=".MainActivity" >
6
7 <TabHost
8 android:id="@android:id/tabhost"
9 android:layout_width="fill_parent"
10 android:layout_height="wrap_content" >
11
12 <LinearLayout
13 android:layout_width="fill_parent"
14 android:layout_height="wrap_content"
15 android:orientation="vertical" >
16
17 <TabWidget
18 android:id="@android:id/tabs"
19 android:orientation="horizontal"
20 android:layout_width="fill_parent"
21 android:layout_height="wrap_content"
22 android:layout_weight="0" />
23
24 <FrameLayout
25 android:id="@android:id/tabcontent"
26 android:layout_width="0dp"
27 android:layout_height="0dp"
28 android:layout_weight="0" />
29
30 <android.support.v4.view.ViewPager
31 android:id="@+id/viewpager"
32 android:layout_width="fill_parent"
33 android:layout_height="wrap_content"
34 android:layout_gravity="bottom" />
35
36 </LinearLayout>
37 </TabHost>
38
39</LinearLayout>