如何为可滑动标签添加图标

Question

我正在从here下载代码，我想用图标显示标签，如何拥有请帮助我。

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 public class MainActivity extends FragmentActivity implements
            ActionBar.TabListener {

    private ViewPager viewPager;
    private TabsPagerAdapter mAdapter;
    private ActionBar actionBar;
    // Tab titles
    private String[] tabs = { "Text", "Photo", "Record" ,"Tag"};


    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    @SuppressLint("NewApi")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

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

        final int[] ICONS = new int[] {
            R.drawable.ic_launcher,
            R.drawable.ic_launcher,
            R.drawable.ic_launcher,
            R.drawable.ic_launcher,
    };

        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 void onTabReselected(Tab tab, FragmentTransaction ft) {
    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        // on tab selected
        // show respected fragment view
        viewPager.setCurrentItem(tab.getPosition());
    }

    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
    }

}

Answer 1

如果您使用的是TabLayout，只需执行以下操作(此示例使用三个选项卡)：

 //An array containing your icons from the drawable directory
 final int[] ICONS = new int[]{
            R.drawable.icon_1,
            R.drawable.icon_2,
            R.drawable.icon_3
    };

    //Get reference to your Tablayout
    TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(mViewPager);

    tabLayout.getTabAt(0).setIcon(ICONS[0]);
    tabLayout.getTabAt(1).setIcon(ICONS[1]);
    tabLayout.getTabAt(2).setIcon(ICONS[2]);

Answer 2

在for循环中添加.setIcon(resources.getDrawable(DrawableIDHere))，并稍微修改for循环。

// Adding Tabs
for (int i=0; i < tabs.length; i++)
{
actionBar.addTab(actionBar.newTab().setText(tabs[i])
                         .setIcon(resources.getDrawable(ICONS[i]))
                         .setTabListener(this));
}//endfor

另外，别忘了在你的图标数组中放入正确的可抽选ID！

Answer 3

// here you add an array of your icon   
 final int[] ICONS = new int[] {
                    R.drawable.ic_launcher,
                    R.drawable.ic_launcher,
                    R.drawable.ic_launcher,
                    R.drawable.ic_launcher,
            };

    // add this following code to solve your problem
    // here NewsFeedActivity.this.getResources() is used to get the drawable folder resource
    // instead of NewsFeedActivity you have to use your activity name here  
    for (int i=0; i < tabs.length; i++)
            {
            actionBar.addTab(actionBar.newTab().setText(tabs[i])
                                     .setIcon(NewsFeedActivity.this.getResources().getDrawable(ICONS[i]))
                                     .setTabListener(this));
            }//endfor