尽管setHasOptionsMenu(true),ActionBar图标不会显示FragmentActivity

Question

在我的Android应用程序中,我正在尝试在FragmentActivity中向ActionBar添加图标; 然而,它仍然是空白.基本上我有一个FragmentActivity与单独的Fragments,它们是可滚动的标签,如下所示:

我想动作栏有两个来自block.xml的图标

<menu xmlns:android="http://schemas.android.com/apk/res/android"
      xmlns:app="http://schemas.android.com/apk/res-auto"
      xmlns:tools="http://schemas.android.com/tools"

      tools:context=".SetupActivity" >



    <item android:id="@+id/action_overflow"
          android:title="@string/action_settings"
          android:orderInCategory="100"
          android:icon="@drawable/ic_action_overflow"
          app:showAsAction="always" />

    <item android:id="@+id/action_search"
          android:title="@string/search"
          android:orderInCategory="200"
          android:icon="@drawable/ic_action_search"
          app:showAsAction="always" />
</menu>

我希望它看起来像这样:

我试图遵循这个:onCreateOptionsMenu在手机版本上运行时没有在FragmentActivity上调用

这个 https://github.com/thecodepath/android_guides/wiki/ActionBar-Tabs-with-Fragments

这是我的BlockActivity类,它扩展了FragmentActivity.我不确定为什么ActionBar无法编辑,尽管有onCreateOptionsMenu方法.

package com.spicycurryman.getdisciplined10.app;

import android.annotation.TargetApi;
import android.app.ActionBar;
import android.app.FragmentTransaction;
import android.os.Build;
import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.view.ViewPager;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;

import info.androidhive.tabsswipe.adapter.TabsPagerAdapter;


// Find out about the default file template warning



/**
 * Created by Spicycurryman on 6/17/14.
 */
public  class BlockActivity extends FragmentActivity implements
        ActionBar.TabListener {



    private ViewPager viewPager;
    private TabsPagerAdapter mAdapter;
    private ActionBar actionBar;
    // Tab titles
    private String[] tabs = {"Installed", "System", "Custom"};

    @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.block_apps);


        // Initilization
        viewPager = (ViewPager) findViewById(R.id.pager);
        actionBar = getActionBar();
        mAdapter = new TabsPagerAdapter(getSupportFragmentManager());

        viewPager.setAdapter(mAdapter);
        actionBar.setHomeButtonEnabled(false);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

        // Adding Tabs
        for (String tab_name : tabs) {
            actionBar.addTab(actionBar.newTab().setText(tab_name)
                    .setTabListener(this));
        }

        /**
         * on swiping the viewpager make respective tab selected
         * */
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override
            public void onPageSelected(int position) {
                // on changing the page
                // make respected tab selected
                actionBar.setSelectedNavigationItem(position);
            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
            }
        });

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu){
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.block, menu);

        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onPrepareOptionsMenu(Menu menu) {
        return super.onPrepareOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        if (id == R.id.action_overflow) {
            return true;
        } else if(id == R.id.action_search) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }





    @Override
    public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {
        viewPager.setCurrentItem(tab.getPosition());

    }

    @Override
    public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {

    }

    @Override
    public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) {

    }





    }

我已经尝试了从Fragments中膨胀到FragmentActivity中所做的一切,以及之间的一切都不确定现在要做什么......

Answer 1

而不是扩展FragmentActivity,扩展ActionBarActivity.

ActionBarActivity拥有所拥有的一切,FragmentActivity并允许您ActionBar通过呼叫getActionBar()或getSupportActionBar()支持版本轻松访问您.

你可以在这里查看更多相关信息.

不要忘记将活动主题设置为Theme.AppCompat或类似主题,它将起作用.