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a guest Jul 16th, 2019 66 Never
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  1. import android.support.v7.app.AppCompatActivity;
  2. import android.os.Bundle;
  3. import android.view.Menu;
  4. import android.view.MenuItem;
  5. import android.widget.Toast;
  6.  
  7. public class MainActivity extends AppCompatActivity {
  8.  
  9.     @Override
  10.     protected void onCreate(Bundle savedInstanceState) {
  11.         super.onCreate(savedInstanceState);
  12.         setContentView(R.layout.activity_main);
  13.     }
  14.  
  15.     //Método para mostrar y ocultar el menú
  16.     public boolean onCreateOptionsMenu(Menu menu){
  17.         getMenuInflater().inflate(R.menu.overflow, menu);
  18.         return true;
  19.     }
  20.  
  21.     //Método para asignar las funciones correspondientes a las opciones.
  22.     public boolean onOptionsItemSelected(MenuItem item){
  23.         int id = item.getItemId();
  24.  
  25.         if(id == R.id.item1){
  26.             Toast.makeText(this, "Opción 1", Toast.LENGTH_SHORT).show();
  27.         } else if(id == R.id.item2){
  28.             Toast.makeText(this, "Opción 2", Toast.LENGTH_SHORT).show();
  29.         }else if(id == R.id.item3){
  30.             Toast.makeText(this, "Opción 3", Toast.LENGTH_SHORT).show();
  31.         }
  32.         return super.onOptionsItemSelected(item);
  33.     }
  34. }
  35.      
  36. 1- click en el menu Build
  37. 2- click en Clean Project
  38. 3- click en Build Project
  39.      
  40. 1- click en el menu File
  41. 2- Invalidates Cache /restart
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