CODEWITHSUNDEEP
android
maksem.va
maksem.va

Reputation: 1

How can i add an action button to action bar

I'm new to Android developing. Can someone explain how to add action button into this class if it is possible? 

public class HomeFragment extends Fragment {
public View onCreateView(@NonNull LayoutInflater inflater,
                         ViewGroup container, Bundle savedInstanceState) {
    HomeViewModel homeViewModel = ViewModelProviders.of(this).get(HomeViewModel.class);
    View root = inflater.inflate(R.layout.fragment_home, container, false);
    final TextView textView = root.findViewById(R.id.text_home);
    homeViewModel.getText().observe(this, new Observer<String>() {
        @Override
        public void onChanged(@Nullable String s) {
            textView.setText(s);
        }
    });
    return root;
}

and xml file 

<TextView
    android:id="@+id/text_home"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginStart="8dp"
    android:layout_marginTop="8dp"
    android:layout_marginEnd="8dp"
    android:textAlignment="center"
    android:textSize="20sp"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

Upvotes: 0

Views: 89

Answers (5)

Bay
Bay

Reputation: 497

Once you want to add onCreateOptionsMenu, you should press CTRL + O to open the dialog window, then type in onCreateOptionsMenu and choose it.

Let the Android Studio creates the code in a related and necessary place. (Source: https://www.youtube.com/watch?v=oh4YOj9VkVE )

So, you may write the true code, on the wrong paranthesis.

Upvotes: 0

Matteo Reinerio
Matteo Reinerio

Reputation: 11

If you want to add an action button over the toolbar, you have to:

  1. Create the menu and the related item inside the menu folder:

    <menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">
    <item
        android:id="@+id/action_add"
        android:icon="@android:drawable/ic_menu_add"
        android:title="Add"
        app:showAsAction="ifRoom|collapseActionView"/>
</menu>

NOTE: In this example, I added a button to add an element;

  1. You have to inflate the menu inside the MainActivity class:

    @Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    super.onCreateOptionsMenu(menu, inflater);
    getMenuInflater().inflate(R.menu.add_menu, menu);
    return true;
}

  2. Then you can add action over the button

    @Override
public boolean onOptionsItemSelected(MenuItem item) {

    if(item.getItemId()==R.id.action_add){
        //Do something
    }
    return super.onOptionsItemSelected(item);
}

I Hope this will help you!

Upvotes: 0

Waqar Farooqui
Waqar Farooqui

Reputation: 81

implement mymenu.xml in this way

<menu xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<item
android:id="@+id/mybutton"
android:title="Add"
app:showAsAction="always"
android:icon="@drawable/mybuttonicon"
/>
</menu>

Upvotes: 1

Waqar Farooqui
Waqar Farooqui

Reputation: 81

If you want to customize U.I of your Action Bar, then you can use Toolbar as Action Bar. Here are the steps to do the same:

// create an action bar button

@Override public boolean on CreateOptionsMenu(Menu menu) {

// R.menu.mymenu is a reference to an xml file named mymenu.xml which should be inside your res/menu directory.

// If you don't have res/menu, just create a directory named "menu" inside res

getMenuInflater().inflate(R.menu.mymenu, menu);
return super.onCreateOptionsMenu(menu);

}

Upvotes: 1

unownsp
unownsp

Reputation: 725

override this method in your activity

@Override
public boolean onCreateOptionsMenu(Menu menu) {
 // Inflate the menu; this adds items to the action bar if it is present.
 getMenuInflater().inflate(R.menu.home, menu);
 return true;
 }

for this you have to create a menu named "home" in your menu folder (if you don't see a menu folder please create one inside res)

Upvotes: 0

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