Android 如何为可滑动选项卡添加图标

how to add the icon for swipeable tabs

提问by user3114723

I am downloading the code from herei want to dispaly tabs with icon how can posssible please help me.

我正在从这里下载代码我想显示带有图标的选项卡怎么可能请帮助我。

 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) {
    }

}

回答by Ojonugwa Jude Ochalifu

If you are using a TabLayout, just do this (This example uses three tabs):

如果您使用的是TabLayout，只需执行此操作（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]);

回答by Jake JediMastr Ellis

Add .setIcon(resources.getDrawable(DrawableIDHere)) in your for loop, and also alter your for loop a bit.

在你的 for 循环中添加 .setIcon(resources.getDrawable(DrawableIDHere)) ，并稍微改变你的 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

Also, don't forget to put the right drawable ID's in your ICONS array!

另外，不要忘记将正确的可绘制 ID 放入您的 ICONS 数组中！

回答by user2480902

// 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

回答by dinesh sharma

Hi check out the ViewPagerIndicatorlibrary.

您好，请查看ViewPagerIndicator库。

This is very good example for swipe-able tabs.

这是可滑动选项卡的很好示例。