Android：所有活动的导航抽屉
我想在Android项目的所有活动中添加导航抽屉。 这是MainActivity的代码：
public class MainActivity extends Activity { private String[] drawerListViewItems; private DrawerLayout drawerLayout; private ListView drawerListView; private ActionBarDrawerToggle actionBarDrawerToggle; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); // get list items from strings.xml drawerListViewItems = getResources().getStringArray(R.array.items); // get ListView defined in activity_main.xml drawerListView = (ListView) findViewById(R.id.left_drawer); // Set the adapter for the list view drawerListView.setAdapter(new ArrayAdapter(this, R.layout.drawer_listview_item, drawerListViewItems)); // App Icon drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); //drawerLayout = (DrawerLayout) findViewById(R.drawable.ic_drawer_2); actionBarDrawerToggle = new ActionBarDrawerToggle( this, /* host Activity */ drawerLayout, /* DrawerLayout object */ R.drawable.ic_drawer, /* nav drawer icon to replace 'Up' caret */ R.string.drawer_open, /* "open drawer" description */ R.string.drawer_close /* "close drawer" description */ ); // Set actionBarDrawerToggle as the DrawerListener drawerLayout.setDrawerListener(actionBarDrawerToggle); getActionBar().setDisplayHomeAsUpEnabled(true); // just styling option add shadow the right edge of the drawer drawerLayout.setDrawerShadow(R.drawable.ic_drawer, GravityCompat.START); drawerListView.setOnItemClickListener(new DrawerItemClickListener()); } @Override protected void onPostCreate(Bundle savedInstanceState) { super.onPostCreate(savedInstanceState); // Sync the toggle state after onRestoreInstanceState has occurred. actionBarDrawerToggle.syncState(); } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); actionBarDrawerToggle.onConfigurationChanged(newConfig); } @Override public boolean onOptionsItemSelected(MenuItem item) { // call ActionBarDrawerToggle.onOptionsItemSelected(), if it returns true // then it has handled the app icon touch event if (actionBarDrawerToggle.onOptionsItemSelected(item)) { return true; } return super.onOptionsItemSelected(item); } private class DrawerItemClickListener implements ListView.OnItemClickListener { @Override public void onItemClick(AdapterView parent, View view, int position, long id) { displayView(position); drawerLayout.closeDrawer(drawerListView); } private void displayView(int position) { switch (position) { case 0: secondactivity(); break; case 1: Toast.makeText(MainActivity.this, "2", Toast.LENGTH_LONG).show(); break; case 2: Toast.makeText(MainActivity.this, "3", Toast.LENGTH_LONG).show(); default: break; } } } public void secondactivity (){ Intent cambioActivity; cambioActivity = new Intent (this, SecondActivity.class); startActivity(cambioActivity); } } 在这段代码中我创建了导航抽屉，我想在所有活动上使用导航抽屉，所以我的第二个活动的代码是这样的：
public class SecondActivity extends MainActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_secondactivity); }
导航抽屉是第一个活动，但没有其他活动，为什么？ 有人能帮我吗？
简单的方法是你应该创建片段。 如果你准备好做一点困难，那么这就适合你。 它将让您在所有活动中拥有相同的导航抽屉 。
创建drawer_n_activity.xml
你的DrawerActivity.class
public class DrawerActivity extends Activity { public RelativeLayout fullLayout; public FrameLayout frameLayout; @Override public void setContentView(int layoutResID) { fullLayout = (RelativeLayout) getLayoutInflater().inflate(R.layout.drawer_n_activity, null); frameLayout = (FrameLayout) fullLayout.findViewById(R.id.drawer_frame); getLayoutInflater().inflate(layoutResID, frameLayout, true); super.setContentView(fullLayout); //Your drawer content... } }
现在，要在所有活动中包含相同的导航抽屉并再考虑一件事，您的所有活动都必须扩展 DrawerActivity
public class MainActivity extends DrawerActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //layout for 1st activity } } public class SecondActivity extends DrawerActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.second_activity); //layout for 2nd activity } }
好吧，伙计们会分享我这样做的方式（如果您正在开发一个人之后的项目并且已经有很多活动）。
最后，我用一行代码（在onCreate ）为导航抽屉充气：
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mContext = this; //context //setContentView(R.layout.activity_favorites); // Was so Utils.inflatedNavigationDrawerView(mContext, R.layout.activity_favorites); // Now is //... }
那么什么是Utils ？ ：
public class Utils{ public static void inflatedNavigationDrawerView(Context context, int layoutId){ // Here get view of clear DrawerLayout final View drawerLayout = View.inflate(context,R.layout.navigation_drawer_inflator, null); // Next inflate to it passed layout for activity final View mainLayout = View.inflate(context,layoutId, (ViewGroup) drawerLayout); // And finally inflate to it fragment for NavigationDraver final View fragmentLayout = View.inflate(context,R.layout.navigation_drawer_inflator_fragment, (ViewGroup) drawerLayout); // Next we should try to get our drawer (should check with casting to each activity you want to insert to) NavigationDrawerFragment drawerFragment = null; // this block should be repeated for each activity you want to use in. if (context instanceof FavoritesActivity){ // Set our pack of inflates to contentview ((FavoritesActivity) context).setContentView(mainLayout); // And now we get NavigationDrawerFragment drawerFragment = (NavigationDrawerFragment) ((FavoritesActivity) context).getSupportFragmentManager().findFragmentById(R.id.navigation_drawer_fragment); } if(drawerFragment != null){ // if null then we missed some castings for activity used in. // Finally setup our drawer drawerFragment.setUpEasy(R.id.navigation_drawer_fragment, (DrawerLayout)drawerLayout.findViewById(R.id.drawer_layout), (Toolbar) mainLayout.findViewById(R.id.app_bar)); } } }
如果您想避免在工具栏中创建汉堡包，那么您应该在setUpEasy中放置： mDrawerToggle.setDrawerIndicatorEnabled(false);
这是我的设置示例：
public void setUpEasy(int fragmentId, DrawerLayout drawerLayout, Toolbar toolBar) { mContainerView = getActivity().findViewById(fragmentId); mDrawerLayout = drawerLayout; mDrawerToggle = new ActionBarDrawerToggle(getActivity(), drawerLayout, toolBar, R.string.open, R.string.close){ @Override public void onDrawerOpened(View drawerView) { super.onDrawerOpened(drawerView); if(!mUserLearnedDrawer){ mUserLearnedDrawer = true; saveToPreferences(getActivity(), Constants.PREFERENCES_LEARNDRAWER_KEY, mUserLearnedDrawer+""); } } @Override public void onDrawerClosed(View drawerView) { super.onDrawerClosed(drawerView); } }; mDrawerToggle.setDrawerIndicatorEnabled(false); // If false then no hamburger menu. mDrawerLayout.setDrawerListener(mDrawerToggle); mDrawerLayout.post(new Runnable() { @Override public void run() { mDrawerToggle.syncState(); } }); }
和使用的观点：
// navigation_drawer_inflator.xml
// navigation_drawer_inflator_fragment.xml
最后，如果您将实现此function – 您将能够在运行时将导航抽屉插入任何活动。 干杯:)
这是我如何做到的。 创建帮助程序类。 我还添加了一些可选代码来完成（）类的完成。
public class NavDrawerHelper extends ContextWrapper{ public NavDrawerHelper(Context context){ super(context); } public void initNav(final DrawerLayout drawerLayout, NavigationView navigationView, Toolbar toolbar, final boolean isFinish){ navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() { @Override public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) { int id = menuItem.getItemId(); switch (id){ case R.id.nav_home: startActivity(new Intent(getBaseContext(), MainActivity.class)); if (isFinish) ((Activity)getBaseContext()).finish(); drawerLayout.closeDrawers(); break; case R.id.nav_settings: startActivity(new Intent(getBaseContext(), SettingsActivity.class)); if (isFinish) ((Activity)getBaseContext()).finish(); drawerLayout.closeDrawers(); break; } return true; } }); ActionBarDrawerToggle actionBarDrawerToggle = new ActionBarDrawerToggle(((Activity)getBaseContext()),drawerLayout,toolbar,R.string.drawer_open,R.string.drawer_close){ @Override public void onDrawerClosed(View v){ super.onDrawerClosed(v); } @Override public void onDrawerOpened(View v) { super.onDrawerOpened(v); } }; drawerLayout.addDrawerListener(actionBarDrawerToggle); actionBarDrawerToggle.syncState(); }
}
然后将此代码添加到所有活动中。 这将替换您现有的initNavigationDrawer（）方法。
public void initNavigationDrawer() { //views NavigationView navigationView = findViewById(R.id.navigation_view); DrawerLayout drawerLayout = findViewById(R.id.drawer); NavDrawerHelper navDrawerHelper = new NavDrawerHelper(this); navDrawerHelper.initNav(drawerLayout, navigationView, toolbar, false);
}