Versuchen Sie, zwei Rahmenlayout in Hauptaktivitätsdatei zu laden

Question

Ich versuche, zwei Rahmenlayouts für verschiedene Aktivitäten zu laden. Das Problem ist, dass beide Frames gleichzeitig Daten anzeigen. Ich habe die Methode setVisibilty in der Java-Hauptdatei verwendet. Ich möchte, wenn ein Frame Daten anzeigt, wird der andere Frame automatisch ausgeblendet. Kann mir jemand die Java-Codes sagen?

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

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

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

@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; 
} 

private void setFrameVisibility (boolean frameOneVisible){ 
    if (frameOneVisible){ 
     findViewById(R.id.content_frame).setVisibility(View.VISIBLE); 
     findViewById(R.id.content_frametwo).setVisibility(View.GONE); 
    } else { 
     findViewById(R.id.content_frame).setVisibility(View.GONE); 
     findViewById(R.id.content_frametwo).setVisibility(View.VISIBLE); 
    } 
} 

@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(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 


@SuppressWarnings("StatementWithEmptyBody") 
@Override 
public boolean onNavigationItemSelected(MenuItem item) { 
    // Handle navigation view item clicks here. 
    int id = item.getItemId(); 
    FragmentManager fragmentManager = getFragmentManager(); 

    if (id == R.id.homepage) { 
     Intent homepage = new Intent (MainActivity.this, MainActivity.class); 
     startActivity(homepage); 
         // Handle the camera action 
    } else if (id == R.id.foodpage) { 
     //handle the food page here 
     fragmentManager.beginTransaction() 
       .replace(R.id.content_frame 
         , new FirstFragment()) 
       .commit(); 

    } else if (id == R.id.schedulepage) { 
     fragmentManager.beginTransaction() 
       .replace(R.id.content_frame 
       , new ScheduleFragment()) 
       .commit(); 

    } else if (id == R.id.emotionspage) { 
     fragmentManager.beginTransaction() 
       .replace(R.id.content_frame 
       , new EmotionsFragment()) 
       .commit(); 

    } else if (id == R.id.basicneedspage) { 
     fragmentManager.beginTransaction() 
       .replace(R.id.content_frametwo 
       , new BasicneedsFragment()) 
       .commit(); 

    } else if (id == R.id.exit) { 
     askBeforeExit(); 

    } 

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

public void onBackPressed() { 

    askBeforeExit(); 
} 

private void askBeforeExit(){ 
    AlertDialog.Builder builder = new AlertDialog.Builder(this); 
    builder.setCancelable(false); 
    builder.setTitle("Confirm Exit"); 
    builder.setMessage("Are you sure you want to quit?"); 
    builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      finish(); 
     } 
    }); 
    builder.setNegativeButton("No", new DialogInterface.OnClickListener() { 
     @Override 
     public void onClick(DialogInterface dialog, int which) { 
      dialog.cancel(); 
     } 
    }); 
    AlertDialog alert=builder.create(); 
    alert.show(); 
} 

}

Answer 1

einen Methodenaufruf In der setFrameVisibility in Ihrem onCreate und andere Methoden, die Ihnen die Hin- und Herschalten zwischen zwei Layouts zu tun:

NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); 
    navigationView.setNavigationItemSelectedListener(this); 
    setFrameVisibility(true); //or false 
}