Java tutorial
/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.masil.android.navigationdrawer; import android.app.Activity; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.content.res.Configuration; import android.graphics.Color; import android.os.Bundle; import android.support.v4.app.ActionBarDrawerToggle; import android.support.v4.widget.DrawerLayout; import android.support.v7.widget.RecyclerView; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.WindowManager; import android.widget.Toast; import com.example.android.navigationdrawer.R; /** * This example illustrates a common usage of the DrawerLayout widget * in the Android support library. * <p/> * <p>When a navigation (left) drawer is present, the host activity should detect presses of * the action bar's Up affordance as a signal to open and close the navigation drawer. The * ActionBarDrawerToggle facilitates this behavior. * Items within the drawer should fall into one of two categories:</p> * <p/> * <ul> * <li><strong>View switches</strong>. A view switch follows the same basic policies as * list or tab navigation in that a view switch does not create navigation history. * This pattern should only be used at the root activity of a task, leaving some form * of Up navigation active for activities further down the navigation hierarchy.</li> * <li><strong>Selective Up</strong>. The drawer allows the user to choose an alternate * parent for Up navigation. This allows a user to jump across an app's navigation * hierarchy at will. The application should treat this as it treats Up navigation from * a different task, replacing the current task stack using TaskStackBuilder or similar. * This is the only form of navigation drawer that should be used outside of the root * activity of a task.</li> * </ul> * <p/> * <p>Right side drawers should be used for actions, not navigation. This follows the pattern * established by the Action Bar that navigation should be to the left and actions to the right. * An action should be an operation performed on the current contents of the window, * for example enabling or disabling a data overlay on top of the current content.</p> */ public class NavigationDrawerActivity extends Activity implements PlanetAdapter.OnItemClickListener { private DrawerLayout mDrawerLayout; private RecyclerView mDrawerList; private ActionBarDrawerToggle mDrawerToggle; private CharSequence mDrawerTitle; private CharSequence mTitle; private String[] mPlanetTitles; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.activity_navigation_drawer); mPlanetTitles = getResources().getStringArray(R.array.planets_array); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (RecyclerView) findViewById(R.id.left_drawer); // set a custom shadow that overlays the main content when the drawer opens mDrawerLayout.setScrimColor(Color.TRANSPARENT); //mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); // improve performance by indicating the list if fixed size. mDrawerList.setHasFixedSize(true); // set up the drawer's list view with items and click listener mDrawerList.setAdapter(new PlanetAdapter(mPlanetTitles, this)); // enable ActionBar app icon to behave as ae nav drawer getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); getActionBar().setDisplayShowTitleEnabled(false); // ActionBarDrawerToggle ties together the the proper interactions // between the sliding drawer and the action bar app icon mDrawerToggle = new ActionBarDrawerToggle(this, /* host Activity */ mDrawerLayout, /* DrawerLayout object */ R.drawable.ic_drawer, /* nav drawer image to replace 'Up' caret */ R.string.drawer_open, /* "open drawer" description for accessibility */ R.string.drawer_close /* "close drawer" description for accessibility */ ) { public void onDrawerClosed(View view) { getActionBar().setTitle(mTitle); super.onDrawerClosed(view); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } public void onDrawerOpened(View drawerView) { getActionBar().setTitle(mDrawerTitle); super.onDrawerOpened(drawerView); invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu() } }; mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(0); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. // getMenuInflater().inflate(R.menu.menu_home,menu); return true; } /* Called whenever we call invalidateOptionsMenu() */ @Override public boolean onPrepareOptionsMenu(Menu menu) { // If the nav drawer is open, hide action items related to the content view // boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList); // menu.findItem(R.id.btn_home).setVisible(!drawerOpen); return super.onPrepareOptionsMenu(menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { // The action bar home/up action should open or close the drawer. // ActionBarDrawerToggle will take care of this. int id = item.getItemId(); if (mDrawerToggle.onOptionsItemSelected(item)) { if (id == R.id.btn_home) { MasilFragment fragment = new MasilFragment(); FragmentManager fragmentManager = getFragmentManager(); FragmentTransaction ft = fragmentManager.beginTransaction(); ft.replace(R.id.content_frame, fragment); ft.commit(); return true; } } return super.onOptionsItemSelected(item); } /* The click listener for RecyclerView in the navigation drawer */ @Override public void onClick(View view, int position) { selectItem(position); } private void selectItem(int position) { // update the main content by replacing fragments // Fragment fragment = PlanetFragment.newInstance(position); switch (position) { case 0: MasilFragment fragment = new MasilFragment(); FragmentManager fragmentManager = getFragmentManager(); FragmentTransaction ft = fragmentManager.beginTransaction(); ft.replace(R.id.content_frame, fragment); ft.commit(); break; case 1: Toast.makeText(getApplicationContext(), "? ", Toast.LENGTH_SHORT).show(); break; case 2: Toast.makeText(getApplicationContext(), "? ?", Toast.LENGTH_SHORT).show(); break; case 3: Toast.makeText(getApplicationContext(), "? ?", Toast.LENGTH_SHORT).show(); break; } // update selected item title, then close the drawer setTitle(mPlanetTitles[position]); mDrawerLayout.closeDrawer(mDrawerList); } @Override public void setTitle(CharSequence title) { mTitle = title; getActionBar().setTitle(mTitle); //getActionBar().setBackgroundDrawable(ContextCompat.getDrawable(this,R.drawable.maintop)); } /** * 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); // Pass any configuration change to the drawer toggls mDrawerToggle.onConfigurationChanged(newConfig); } /** * Fragment that appears in the "content_frame", shows a planet */ /* public static class PlanetFragment extends Fragment { public static final String ARG_PLANET_NUMBER = "planet_number"; public PlanetFragment() { // Empty constructor required for fragment subclasses } public static Fragment newInstance(int position) { Fragment fragment = new PlanetFragment(); Bundle args = new Bundle(); args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position); fragment.setArguments(args); return fragment; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_planet, container, false); int i = getArguments().getInt(ARG_PLANET_NUMBER); String planet = getResources().getStringArray(R.array.planets_array)[i]; int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()), "drawable", getActivity().getPackageName()); ImageView iv = ((ImageView) rootView.findViewById(R.id.image)); iv.setImageResource(imageId); getActivity().setTitle(planet); return rootView; } }*/ }