diff options
Diffstat (limited to 'app/src/main/java')
| -rw-r--r-- | app/src/main/java/uk/co/blatech/blaupload/HomeScreen.java | 146 | ||||
| -rw-r--r-- | app/src/main/java/uk/co/blatech/blaupload/NavigationDrawerFragment.java | 282 |
2 files changed, 428 insertions, 0 deletions
diff --git a/app/src/main/java/uk/co/blatech/blaupload/HomeScreen.java b/app/src/main/java/uk/co/blatech/blaupload/HomeScreen.java new file mode 100644 index 0000000..3c20697 --- /dev/null +++ b/app/src/main/java/uk/co/blatech/blaupload/HomeScreen.java @@ -0,0 +1,146 @@ +package uk.co.blatech.blaupload; + +import android.app.Activity; + +import android.app.ActionBar; +import android.app.Fragment; +import android.app.FragmentManager; +import android.content.Context; +import android.os.Build; +import android.os.Bundle; +import android.view.Gravity; +import android.view.LayoutInflater; +import android.view.Menu; +import android.view.MenuItem; +import android.view.View; +import android.view.ViewGroup; +import android.support.v4.widget.DrawerLayout; +import android.widget.ArrayAdapter; +import android.widget.TextView; + + +public class HomeScreen extends Activity + implements NavigationDrawerFragment.NavigationDrawerCallbacks { + + /** + * Fragment managing the behaviors, interactions and presentation of the navigation drawer. + */ + private NavigationDrawerFragment mNavigationDrawerFragment; + + /** + * Used to store the last screen title. For use in {@link #restoreActionBar()}. + */ + private CharSequence mTitle; + + @Override + protected void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + setContentView(R.layout.activity_home_screen); + + mNavigationDrawerFragment = (NavigationDrawerFragment) + getFragmentManager().findFragmentById(R.id.navigation_drawer); + mTitle = getTitle(); + + // Set up the drawer. + mNavigationDrawerFragment.setUp( + R.id.navigation_drawer, + (DrawerLayout) findViewById(R.id.drawer_layout)); + } + + @Override + public void onNavigationDrawerItemSelected(int position) { + // update the main content by replacing fragments + FragmentManager fragmentManager = getFragmentManager(); + fragmentManager.beginTransaction() + .replace(R.id.container, PlaceholderFragment.newInstance(position + 1)) + .commit(); + } + + public void onSectionAttached(int number) { + switch (number) { + case 1: + mTitle = getString(R.string.title_section1); + break; + case 2: + mTitle = getString(R.string.title_section2); + break; + case 3: + mTitle = getString(R.string.title_section3); + break; + } + } + + public void restoreActionBar() { + ActionBar actionBar = getActionBar(); + actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); + actionBar.setDisplayShowTitleEnabled(true); + actionBar.setTitle(mTitle); + } + + + @Override + public boolean onCreateOptionsMenu(Menu menu) { + if (!mNavigationDrawerFragment.isDrawerOpen()) { + // Only show items in the action bar relevant to this screen + // if the drawer is not showing. Otherwise, let the drawer + // decide what to show in the action bar. + getMenuInflater().inflate(R.menu.home_screen, menu); + restoreActionBar(); + return true; + } + return super.onCreateOptionsMenu(menu); + } + + @Override + public boolean onOptionsItemSelected(MenuItem item) { + // Handle action bar item clicks here. The action bar will + // automatically handle clicks on the Home/Up button, so long + // as you specify a parent activity in AndroidManifest.xml. + int id = item.getItemId(); + if (id == R.id.action_settings) { + return true; + } + return super.onOptionsItemSelected(item); + } + + /** + * A placeholder fragment containing a simple view. + */ + public static class PlaceholderFragment extends Fragment { + /** + * The fragment argument representing the section number for this + * fragment. + */ + private static final String ARG_SECTION_NUMBER = "section_number"; + + /** + * Returns a new instance of this fragment for the given section + * number. + */ + public static PlaceholderFragment newInstance(int sectionNumber) { + PlaceholderFragment fragment = new PlaceholderFragment(); + Bundle args = new Bundle(); + args.putInt(ARG_SECTION_NUMBER, sectionNumber); + fragment.setArguments(args); + return fragment; + } + + public PlaceholderFragment() { + } + + @Override + public View onCreateView(LayoutInflater inflater, ViewGroup container, + Bundle savedInstanceState) { + View rootView = inflater.inflate(R.layout.fragment_home_screen, container, false); + return rootView; + } + + @Override + public void onAttach(Activity activity) { + super.onAttach(activity); + ((HomeScreen) activity).onSectionAttached( + getArguments().getInt(ARG_SECTION_NUMBER)); + } + } + +} diff --git a/app/src/main/java/uk/co/blatech/blaupload/NavigationDrawerFragment.java b/app/src/main/java/uk/co/blatech/blaupload/NavigationDrawerFragment.java new file mode 100644 index 0000000..b86dfa3 --- /dev/null +++ b/app/src/main/java/uk/co/blatech/blaupload/NavigationDrawerFragment.java @@ -0,0 +1,282 @@ +package uk.co.blatech.blaupload; + + +import android.app.Activity; +import android.app.ActionBar; +import android.app.Fragment; +import android.support.v4.app.ActionBarDrawerToggle; +import android.support.v4.view.GravityCompat; +import android.support.v4.widget.DrawerLayout; +import android.content.SharedPreferences; +import android.content.res.Configuration; +import android.os.Bundle; +import android.preference.PreferenceManager; +import android.view.LayoutInflater; +import android.view.Menu; +import android.view.MenuInflater; +import android.view.MenuItem; +import android.view.View; +import android.view.ViewGroup; +import android.widget.AdapterView; +import android.widget.ArrayAdapter; +import android.widget.ListView; +import android.widget.Toast; + +/** + * Fragment used for managing interactions for and presentation of a navigation drawer. + * See the <a href="https://developer.android.com/design/patterns/navigation-drawer.html#Interaction"> + * design guidelines</a> for a complete explanation of the behaviors implemented here. + */ +public class NavigationDrawerFragment extends Fragment { + + /** + * Remember the position of the selected item. + */ + private static final String STATE_SELECTED_POSITION = "selected_navigation_drawer_position"; + + /** + * Per the design guidelines, you should show the drawer on launch until the user manually + * expands it. This shared preference tracks this. + */ + private static final String PREF_USER_LEARNED_DRAWER = "navigation_drawer_learned"; + + /** + * A pointer to the current callbacks instance (the Activity). + */ + private NavigationDrawerCallbacks mCallbacks; + + /** + * Helper component that ties the action bar to the navigation drawer. + */ + private ActionBarDrawerToggle mDrawerToggle; + + private DrawerLayout mDrawerLayout; + private ListView mDrawerListView; + private View mFragmentContainerView; + + private int mCurrentSelectedPosition = 0; + private boolean mFromSavedInstanceState; + private boolean mUserLearnedDrawer; + + public NavigationDrawerFragment() { + } + + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + + // Read in the flag indicating whether or not the user has demonstrated awareness of the + // drawer. See PREF_USER_LEARNED_DRAWER for details. + SharedPreferences sp = PreferenceManager.getDefaultSharedPreferences(getActivity()); + mUserLearnedDrawer = sp.getBoolean(PREF_USER_LEARNED_DRAWER, false); + + if (savedInstanceState != null) { + mCurrentSelectedPosition = savedInstanceState.getInt(STATE_SELECTED_POSITION); + mFromSavedInstanceState = true; + } + + // Select either the default item (0) or the last selected item. + selectItem(mCurrentSelectedPosition); + } + + @Override + public void onActivityCreated (Bundle savedInstanceState) { + super.onActivityCreated(savedInstanceState); + // Indicate that this fragment would like to influence the set of actions in the action bar. + setHasOptionsMenu(true); + } + + @Override + public View onCreateView(LayoutInflater inflater, ViewGroup container, + Bundle savedInstanceState) { + mDrawerListView = (ListView) inflater.inflate( + R.layout.fragment_navigation_drawer, container, false); + mDrawerListView.setOnItemClickListener(new AdapterView.OnItemClickListener() { + @Override + public void onItemClick(AdapterView<?> parent, View view, int position, long id) { + selectItem(position); + } + }); + mDrawerListView.setAdapter(new ArrayAdapter<String>( + getActionBar().getThemedContext(), + android.R.layout.simple_list_item_activated_1, + android.R.id.text1, + new String[]{ + getString(R.string.title_section1), + getString(R.string.title_section2), + getString(R.string.title_section3), + })); + mDrawerListView.setItemChecked(mCurrentSelectedPosition, true); + return mDrawerListView; + } + + public boolean isDrawerOpen() { + return mDrawerLayout != null && mDrawerLayout.isDrawerOpen(mFragmentContainerView); + } + + /** + * Users of this fragment must call this method to set up the navigation drawer interactions. + * + * @param fragmentId The android:id of this fragment in its activity's layout. + * @param drawerLayout The DrawerLayout containing this fragment's UI. + */ + public void setUp(int fragmentId, DrawerLayout drawerLayout) { + mFragmentContainerView = getActivity().findViewById(fragmentId); + mDrawerLayout = drawerLayout; + + // set a custom shadow that overlays the main content when the drawer opens + mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); + // set up the drawer's list view with items and click listener + + ActionBar actionBar = getActionBar(); + actionBar.setDisplayHomeAsUpEnabled(true); + actionBar.setHomeButtonEnabled(true); + + // ActionBarDrawerToggle ties together the the proper interactions + // between the navigation drawer and the action bar app icon. + mDrawerToggle = new ActionBarDrawerToggle( + getActivity(), /* host Activity */ + mDrawerLayout, /* DrawerLayout object */ + R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ + R.string.navigation_drawer_open, /* "open drawer" description for accessibility */ + R.string.navigation_drawer_close /* "close drawer" description for accessibility */ + ) { + @Override + public void onDrawerClosed(View drawerView) { + super.onDrawerClosed(drawerView); + if (!isAdded()) { + return; + } + + getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu() + } + + @Override + public void onDrawerOpened(View drawerView) { + super.onDrawerOpened(drawerView); + if (!isAdded()) { + return; + } + + if (!mUserLearnedDrawer) { + // The user manually opened the drawer; store this flag to prevent auto-showing + // the navigation drawer automatically in the future. + mUserLearnedDrawer = true; + SharedPreferences sp = PreferenceManager + .getDefaultSharedPreferences(getActivity()); + sp.edit().putBoolean(PREF_USER_LEARNED_DRAWER, true).apply(); + } + + getActivity().invalidateOptionsMenu(); // calls onPrepareOptionsMenu() + } + }; + + // If the user hasn't 'learned' about the drawer, open it to introduce them to the drawer, + // per the navigation drawer design guidelines. + if (!mUserLearnedDrawer && !mFromSavedInstanceState) { + mDrawerLayout.openDrawer(mFragmentContainerView); + } + + // Defer code dependent on restoration of previous instance state. + mDrawerLayout.post(new Runnable() { + @Override + public void run() { + mDrawerToggle.syncState(); + } + }); + + mDrawerLayout.setDrawerListener(mDrawerToggle); + } + + private void selectItem(int position) { + mCurrentSelectedPosition = position; + if (mDrawerListView != null) { + mDrawerListView.setItemChecked(position, true); + } + if (mDrawerLayout != null) { + mDrawerLayout.closeDrawer(mFragmentContainerView); + } + if (mCallbacks != null) { + mCallbacks.onNavigationDrawerItemSelected(position); + } + } + + @Override + public void onAttach(Activity activity) { + super.onAttach(activity); + try { + mCallbacks = (NavigationDrawerCallbacks) activity; + } catch (ClassCastException e) { + throw new ClassCastException("Activity must implement NavigationDrawerCallbacks."); + } + } + + @Override + public void onDetach() { + super.onDetach(); + mCallbacks = null; + } + + @Override + public void onSaveInstanceState(Bundle outState) { + super.onSaveInstanceState(outState); + outState.putInt(STATE_SELECTED_POSITION, mCurrentSelectedPosition); + } + + @Override + public void onConfigurationChanged(Configuration newConfig) { + super.onConfigurationChanged(newConfig); + // Forward the new configuration the drawer toggle component. + mDrawerToggle.onConfigurationChanged(newConfig); + } + + @Override + public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { + // If the drawer is open, show the global app actions in the action bar. See also + // showGlobalContextActionBar, which controls the top-left area of the action bar. + if (mDrawerLayout != null && isDrawerOpen()) { + inflater.inflate(R.menu.global, menu); + showGlobalContextActionBar(); + } + super.onCreateOptionsMenu(menu, inflater); + } + + @Override + public boolean onOptionsItemSelected(MenuItem item) { + if (mDrawerToggle.onOptionsItemSelected(item)) { + return true; + } + + if (item.getItemId() == R.id.action_example) { + Toast.makeText(getActivity(), "Example action.", Toast.LENGTH_SHORT).show(); + return true; + } + + return super.onOptionsItemSelected(item); + } + + /** + * Per the navigation drawer design guidelines, updates the action bar to show the global app + * 'context', rather than just what's in the current screen. + */ + private void showGlobalContextActionBar() { + ActionBar actionBar = getActionBar(); + actionBar.setDisplayShowTitleEnabled(true); + actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD); + actionBar.setTitle(R.string.app_name); + } + + private ActionBar getActionBar() { + return getActivity().getActionBar(); + } + + /** + * Callbacks interface that all activities using this fragment must implement. + */ + public static interface NavigationDrawerCallbacks { + /** + * Called when an item in the navigation drawer is selected. + */ + void onNavigationDrawerItemSelected(int position); + } +} |