Verknüpfungsschaltfläche mit einer vorhandenen Aktivität in Android

Question

Ich habe eine Aktivität, die bereits für nav Schublade erstellt wurde. Ich möchte einen button für search in für die schnelle navigation, dass die Verbindung brauche ich hier nicht die drawer für die Suche zu öffnen mein Code wie folgt lautet:

main.xml

<?xml version="1.0" encoding="utf-8"?> 
<menu xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto"> 
    <item 
     android:id="@+id/nav_search" 
     android:icon="@drawable/ic_search" 
     android:title="@string/search" 
     app:showAsAction="always" /> 

</menu> 

Am Hauptaktivität ist wie folgt.

public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { 

    Fragment currFragment; 
    boolean isLoggedPrev, isLoggedCurrent; 
    NavigationView navigationView; 
    boolean doubleBackToExitPressedOnce = false; 
    public static int offsetY = 0; 
    private AdView adView; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_SENSOR_PORTRAIT); 
     setContentView(R.layout.activity_main); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     navigationView = (NavigationView) findViewById(R.id.nav_view); 
     navigationView.setNavigationItemSelectedListener(this); 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
       this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close) { 

      public void onDrawerClosed(View view) { 
       super.onDrawerClosed(view); 
      } 

      public void onDrawerOpened(View drawerView) { 
       super.onDrawerOpened(drawerView); 
       if (UserAccessSession.getInstance(MainActivity.this).getUserSession() != null) { 
        isLoggedCurrent = true; 
       } else { 
        isLoggedCurrent = false; 
       } 

       if (isLoggedCurrent != isLoggedPrev) { 
        isLoggedPrev = isLoggedCurrent; 
        checkLoginNavigation(); 
       } 
      } 
     }; 

     drawer.setDrawerListener(toggle); 
     toggle.syncState(); 

     TypedValue tv = new TypedValue(); 
     if (getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true)) { 
      offsetY = TypedValue.complexToDimensionPixelSize(tv.data, getResources().getDisplayMetrics()); 
      Config.OFFSET_Y = offsetY; 
     } 
     showFragment(new HomeFragment()); 
     showAds(); 
    } 

    public void checkLoginNavigation() { 
     navigationView.getMenu().clear(); 
     UserSession userSession = UserAccessSession.getInstance(this).getUserSession(); 
     if (userSession != null) { 
      navigationView.inflateMenu(R.menu.activity_main_drawer_logged); 
     } else { 
      navigationView.inflateMenu(R.menu.activity_main_drawer_not_logged); 
     } 
    } 

    @Override 
    public void onBackPressed() { 
     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     if (drawer.isDrawerOpen(GravityCompat.START)) { 
      drawer.closeDrawer(GravityCompat.START); 
     } else { 
      if (doubleBackToExitPressedOnce) { 
       super.onBackPressed(); 
       return; 
      } 
      doubleBackToExitPressedOnce = true; 
      Toast.makeText(this, R.string.tap_back_again_to_exit, Toast.LENGTH_SHORT).show(); 
      new Handler().postDelayed(new Runnable() { 
       @Override 
       public void run() { 
        doubleBackToExitPressedOnce = false; 
       } 
      }, 2000); 
     } 
    } 

    @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) { 
     // 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(); 
     return super.onOptionsItemSelected(item); 
    } 

    @SuppressWarnings("StatementWithEmptyBody") 
    @Override 
    public boolean onNavigationItemSelected(MenuItem item) { 
     // Handle navigation view item clicks here. 
     Intent i; 
     int id = item.getItemId(); 
     if(id == R.id.nav_home) { 
      showFragment(new HomeFragment()); 
      setTitle(R.string.app_name); 
     } 
     if(id == R.id.nav_categories) { 
      showFragment(new CategoryFragment()); 
      setTitle(R.string.categories); 
     } 
     if(id == R.id.nav_favorites) { 
      showFragment(new FavoritesFragment()); 
      setTitle(R.string.favorites); 
     } 
     if(id == R.id.nav_featured) { 
      showFragment(new FeaturedFragment()); 
      setTitle(R.string.featured); 
     } 
     if(id == R.id.nav_search) { 
      i = new Intent(this, SearchActivity.class); 
      startActivity(i); 
     } 
     if(id == R.id.nav_news) { 
      showFragment(new NewsFragment()); 
      setTitle(R.string.latest_news); 
     } 
     if(id == R.id.nav_about_us) { 
      showFragment(new AboutUsFragment()); 
      setTitle(R.string.about_us); 
     } 
     if(id == R.id.nav_terms_condition) { 
      showFragment(new TermsConditionFragment()); 
      setTitle(R.string.terms_and_conditions); 
     } 
     if(id == R.id.nav_settings) { 
      i = new Intent(this, SettingsActivity.class); 
      startActivity(i); 
     } 
     if(id == R.id.nav_login) { 
      i = new Intent(this, LoginActivity.class); 
      startActivity(i); 
     } 
     if(id == R.id.nav_profile) { 
      i = new Intent(this, ProfileActivity.class); 
      startActivity(i); 
     } 
     if(id == R.id.nav_my_events) { 
      i = new Intent(this, MyEventsActivity.class); 
      startActivity(i); 
     } 

     DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
     drawer.closeDrawer(GravityCompat.START); 
     return true; 
    } 

    public void showFragment(Fragment fragment) { 
     if (currFragment != null && fragment.getClass().equals(currFragment.getClass())) 
      return; 

     currFragment = fragment; 
     FragmentManager fragmentManager = this.getSupportFragmentManager(); 
     if (fragmentManager == null) 
      return; 

     FragmentTransaction ft = fragmentManager.beginTransaction(); 
     if (ft == null) 
      return; 

     ft.replace(R.id.content_frame, fragment).commitAllowingStateLoss(); 
    } 

Ich würde gerne, wenn ich auf die Schaltfläche Suche klicken, um es die Aktivität Such lädt, die derzeit von navigation drawer verwendet wird.

Answer 1

FYI

android:id="@+id/nav_search" ist MenuItem nicht Teil NavigationItem es von Ihrem onNavigationItemSelected() zu entfernen und hinzufügen, um onOptionsItemSelected()

Versuchen Sie, diese

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    int id = item.getItemId(); 
    if(id == R.id.nav_search) { 
     i = new Intent(this, SearchActivity.class); 
     startActivity(i); 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

Answer 2

Sein die MenuItem nicht NavigationItem.

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    if (item.getItemId() == R.id.nav_search) { 
     // do your stuff here 
    } 
    return super.onOptionsItemSelected(item); 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    getMenuInflater().inflate(R.menu.yourMenu,menu); 
    return super.onCreateOptionsMenu(menu); 
}