如何在Android应用中添加操作栏？

Question

I just start with Android. Want to add action bar following the tutorial . I was added res/menu/main_activity_actions.xml :

 <menu xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:NecoSeparator="http://schemas.android.com/apk/res-auto" >
<!-- Search, should appear as action button -->
<item android:id="@+id/action_search"
      android:icon="@drawable/ic_action_search"
      android:title="@string/action_search"
      NecoSeparator:showAsAction="ifRoom"  />

<!-- Settings, should always be in the overflow -->
<item android:id="@+id/action_settings"
      android:title="@string/action_settings"
      android:showAsAction="never" />

In MainActivity.java i do:

  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu items for use in the action bar
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.main_activity_actions, menu);
    return super.onCreateOptionsMenu(menu);
}

But Eclipse says that cant find : R.menu.main_activity_actions .

What's wrong with this code? I have to do something more with this xml file?

UPDATE

MainActivity.java

package com.example.necoseparator;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends Activity {

    public final static String EXTRA_MESSAGE = "com.example.myfirstapp.MESSAGE";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu items for use in the action bar
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.main_activity_actions, menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle presses on the action bar items
        switch (item.getItemId()) {
            case R.id.action_search:
                openSearch();
                return true;
            case R.id.action_settings:
                openSettings();
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    public void sendMessage(View view) {
        Intent intent = new Intent(this, DisplayMessageActivity.class);
        EditText editText = (EditText) findViewById(R.id.edit_message);
        String message = editText.getText().toString();
        intent.putExtra(EXTRA_MESSAGE, message);
        startActivity(intent);
    }

    }

Answer 1

I Think main problem is to saving your menu layout, if you have an error in file its might happened. please change your menu file with my code and save that and import R file (make sure that is not android.R and its must be YourPackageName.R ) then clean your project and run.

<menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
    android:id="@+id/action_settings"
    android:orderInCategory="100"
    android:showAsAction="never"
    android:title="filtered"
    />

<item
    android:id="@+id/menu_load"
    android:icon="@drawable/ic_luncher"
    android:orderInCategory="200"
    android:showAsAction="always"
    android:title="update"/>

 </menu>

Answer 2

Remove this line xmlns:NecoSeparator="http://schemas.android.com/apk/res-auto and try again

    <!-- Settings, should always be in the overflow -->
    <item android:id="@+id/action_settings"
          android:title="@string/action_settings"
          android:showAsAction="never" />
</menu>

Answer 3

You can use Toolbar

toolbar = (Toolbar) findViewById(R.id.toolbar1); setSupportActionBar(toolbar);

and add list of menus