Tablayout仅带有图标

Question

我正在使用设计支持来创建标签.我也ViewPager用于可跳转标签.

现在,我不知道如何在标签中仅使用图标而不是文本.我试图找出但没有取得任何成功.

我的代码:

Toolbar toolbar;
private TabLayout tabLayout;
private ViewPager viewPager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    viewPager = (ViewPager) findViewById(R.id.pager);
    setupViewPager(viewPager);
    setupTablayout();
}

private void setupTablayout() {
    tabLayout = (TabLayout) findViewById(R.id.tabLayout);
    tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
    tabLayout.setupWithViewPager(viewPager);
}

class MyPagerAdapter extends FragmentPagerAdapter {

    private final List<Fragment> mFragmentList = new ArrayList<>();
    private final List<String> mFragmentTitleList = new ArrayList<>();

    public MyPagerAdapter(FragmentManager manager) {
        super(manager);
    }

    @Override
    public Fragment getItem(int position) {
        return mFragmentList.get(position);
    }

    @Override
    public int getCount() {
        return mFragmentList.size();
    }

    public void addFrag(Fragment fragment, String title) {
        mFragmentList.add(fragment);
        mFragmentTitleList.add(title);
    }

    @Override
    public CharSequence getPageTitle(int position) {
        mFragmentTitleList.get(position)
    }
}

private void setupViewPager(ViewPager viewPager) {
    MyPagerAdapter adapter = new MyPagerAdapter(getSupportFragmentManager());
    adapter.addFrag(new frag(), "CAT");
    adapter.addFrag(new frag(), "DOG");
    adapter.addFrag(new frag(), "BIRD");
    viewPager.setAdapter(adapter);
}

Answer 1

一种方法是在TabLayout.setupWithViewPager()方法之后设置图标.

mTabLayout.setupWithViewPager(mViewPager);
for (int i = 0; i < mTabLayout.getTabCount(); i++) {
  mTabLayout.getTabAt(i).setIcon(R.drawable.your_icon);
}

Answer 2

以下链接中显示的教程应涵盖您想要的内容.https://github.com/codepath/android_guides/wiki/Google-Play-Style-Tabs-using-TabLayout#add-icons-to-tablayout

我复制了下面的相关部分.

将图标添加到TabLayout

目前,TabLayout类不提供允许选项卡中的图标的干净抽象模型.有许多发布的解决方法,其中一个是从PagerAdapter的getPageTitle(position)方法返回一个SpannableString,其中包含ImageSpan中的图标,如下面的代码片段所示:

private int[] imageResId = {
        R.drawable.ic_one,
        R.drawable.ic_two,
        R.drawable.ic_three
};

// ...

@Override
public CharSequence getPageTitle(int position) {
    // Generate title based on item position
    // return tabTitles[position];
    Drawable image = context.getResources().getDrawable(imageResId[position]);
    image.setBounds(0, 0, image.getIntrinsicWidth(), image.getIntrinsicHeight());
    SpannableString sb = new SpannableString(" ");
    ImageSpan imageSpan = new ImageSpan(image, ImageSpan.ALIGN_BOTTOM);
    sb.setSpan(imageSpan, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
    return sb;
}

默认情况下,TabLayout创建的选项卡将textAllCaps属性设置为true,这会阻止ImageSpans呈现.您可以通过更改tabTextAppearance属性来覆盖此行为.

  <style name="MyCustomTabLayout" parent="Widget.Design.TabLayout">
        <item name="tabTextAppearance">@style/MyCustomTextAppearance</item>
  </style>

  <style name="MyCustomTextAppearance" parent="TextAppearance.Design.Tab">
        <item name="textAllCaps">false</item>
  </style>

Answer 3

在新版本中TabLayout,谷歌添加了TabItem哪些可以轻松地通过您的XML添加Icon,代码如下:

<android.support.design.widget.TabLayout
         app:tabTextColor="@color/gray"
         app:tabMode="fixed"
         app:tabBackground="@color/red"
         app:tabIndicatorHeight="4dp"
         app:tabIndicatorColor="@color/purple"
         app:tabPadding="2dp"
         app:tabSelectedTextColor="@color/white"
         app:tabMinWidth="64dp"
         android:layout_height="wrap_content"
         android:layout_width="match_parent">

     <!--add height and width to TabItem -->
     <android.support.design.widget.TabItem 
             android:text="@string/tab_text"/>

     <android.support.design.widget.TabItem
             android:icon="@drawable/ic_android"/>

 </android.support.design.widget.TabLayout>

在这里查看更多.

Answer 4

试试这个

    public class GlobalActivity extends AppCompatActivity {
    Toolbar toolbar;
    ViewPager viewPager;
    TabLayout tabLayout;
    ViewPagerAdapter adapter;
    private int[] tabIcons = {
            R.drawable.home_ic,
            R.drawable.biz_ic,
            R.drawable.network_ic,
            R.drawable.offers_ic,
            R.drawable.message_ic_b
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_global_hub);
        tab();
    }
    public void tab(){
        viewPager = (ViewPager) findViewById(R.id.viewpager);
        setupViewPager(viewPager);
        tabLayout = (TabLayout) findViewById(R.id.tablayout);
        tabLayout.setupWithViewPager(viewPager);
        setupTabIcons();

    }
    private void setupTabIcons() {
        tabLayout.getTabAt(0).setIcon(tabIcons[0]);
        tabLayout.getTabAt(1).setIcon(tabIcons[1]);
        tabLayout.getTabAt(2).setIcon(tabIcons[2]);
        tabLayout.getTabAt(3).setIcon(tabIcons[3]);
        tabLayout.getTabAt(4).setIcon(tabIcons[4]);

    }
    public void setupViewPager(ViewPager viewPager){
        adapter = new ViewPagerAdapter(getSupportFragmentManager());
        adapter.addFrag(new GlHubFragment(),"HOME");
        adapter.addFrag(new BizForumFragment(), "BIZ FORUM");
        adapter.addFrag(new NetworkFragment(), "NETWORK");
        adapter.addFrag(new MessagesFragment(), "MESSAGEs");
        adapter.addFrag(new OfferFragmentActivity(), "OFFER");
        viewPager.setAdapter(adapter);
    }

    public class ViewPagerAdapter extends FragmentPagerAdapter{
        private final List<Fragment> mfragmentlist =new ArrayList<>();
        private final List<String> mFragmentTitleList = new ArrayList<>();
        public ViewPagerAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int position) {
            return mfragmentlist.get(position);
        }

        @Override
        public int getCount() {
            return mfragmentlist.size();
        }
        public void addFrag(Fragment fragment,String title){
            mfragmentlist.add(fragment);
            mFragmentTitleList.add(title);
        }
        @Override
        public CharSequence getPageTitle(int position){
            return mFragmentTitleList.get(position);
        }
    }
}

Answer 5

在 中TabLayout，设置图标很容易：

getPageTitle(position)应该返回null（如果您不想显示标题）。

下一个 ：

tabLayout.getTabAt(0).setIcon(resId);

tabLayout.getTabAt(1).setIcon(resId);

......

Answer 6

我发现使用图标的最简单方法是使用Tablayout.Tab.setIcon(drawable).这也可以轻松突出显示所选图标.如果要执行此操作,请按照下列步骤操作.

步骤1.将图像添加到res.mipmap文件夹.(mipmap-mdpi,hdpi等)从这里的其他答案判断,然后把它放在res.drawable文件夹中也没关系.

步骤2.在设置TabLayout和ViewPager后,在所有选项卡上调用setIcon.我在AdapterTabs中做了这个,以保持Activity整洁.所以在你的活动中这样做:

    tablayout = (TabLayout) findViewById(R.id.tab_layout);
    viewPager = (ViewPager) findViewById(R.id.viewPager);
    adapterTabs = new AdapterTabs(this, getSupportFragmentManager(), fragments, tablayout, viewPager);

    viewPager.setAdapter(adapterTabs);
    tablayout.setupWithViewPager(viewPager);
    adapterTabs.setTabIcons();

并在你的AdapterTabs中,应该扩展FragmentPagerAdapter,把你的setTabIcons()方法.

    public void setTabTitlesToIcons() {
    Drawable icon1 = context.getResources().getDrawable(R.mipmap.ic_1);
    Drawable icon2 = context.getResources().getDrawable(R.mipmap.ic_2);
    Drawable icon3 = context.getResources().getDrawable(R.mipmap.ic_3);
    Drawable icon1Hilighted = context.getResources().getDrawable(R.mipmap.ic_1_selected);
    Drawable icon2Hilighted = context.getResources().getDrawable(R.mipmap.ic_2_selected);
    Drawable icon3Hilighted = context.getResources().getDrawable(R.mipmap.ic_3_selected);

    icons.add(icon1);
    icons.add(icon2);
    icons.add(icon3);
    iconsHilighted.add(icon1Hilighted);
    iconsHilighted.add(icon2Hilighted);
    iconsHilighted.add(icon3Hilighted);

    for(int i = 0; i < icons.size(); i++) {
        if(i == 0) {
            //noinspection ConstantConditions
            tabLayout.getTabAt(i).setIcon(iconsSelected.get(i));
        }
        else {
            //noinspection ConstantConditions
            tabLayout.getTabAt(i).setIcon(icons.get(i));
        }
    }
}

确保存储对两个列表'icons'和'iconsHilighted'的引用.你以后会需要它们.还存储对从活动传入的TabLayout和ViewPager的引用.

步骤3.确保AdapterTabs.getPageTitle()返回null.此时,如果您运行它,您应该看到第一个图标突出显示.

步骤4.在AdapterTabs中实现ViewPager.OnPageChangeListener并将该侦听器添加到viewPager

    public AdapterTabs(Context context, FragmentManager fragmentManager, List<Fragment> fragments, TabLayout tabLayout, ViewPager viewPager) {
    super(fragmentManager);
    this.context = context;
    this.tabLayout = tabLayout;
    this.viewPager = viewPager;
    this.viewPager.addOnPageChangeListener(this);

    tabs.add(fragments.get(0));
    tabs.add(fragments.get(1));
    tabs.add(fragments.get(2));
}

步骤5.更新AdapterTabs中onPageSelected回调选项卡中的图标.

    @Override
public void onPageSelected(int position) {
    for (int i = 0; i < tabs.size(); i++) {
        if(i == position) {
            //noinspection ConstantConditions
            tabLayout.getTabAt(i).setIcon(iconsSelected.get(i));
        }
        else {
            //noinspection ConstantConditions
            tabLayout.getTabAt(i).setIcon(icons.get(i));
        }
    }
}

现在,您应该在更改选项卡时看到正在更新的高亮图标.

Answer 7

将TabLayout用作ViewPager“装饰”方案时，这些方法都不是很好的选择。TabLayout文档 这是TabLayout和PagerAdapter的简单扩展，它提供了一个简单的替代TabLayout的替代方法，可以在两种情况下都可以使用TabLayout，而无需在TabLayout类之外手动添加图标并遵循PagerAdapter的用法来获取选项卡信息。

/**
 * Created by JDL on 1/18/2017.
 */
public class TabLayoutExt extends TabLayout {

    protected ViewPager mViewPager;

    public abstract static class TabLayoutViewPagerAdapter extends PagerAdapter {
        public TabLayoutViewPagerAdapter() {
        }

        /**
         * This method may be called by the TabLayout to obtain an icon drawable
         * to for the specified tab. This method may return null
         * indicating no tab icon for this page. The default implementation returns
         * null.
         *
         * @param position The position of the title requested
         * @return A drawable icon for the requested page
         */
        public Drawable getPageIcon(Context context, int position) {
            return null;
        }
    }

    public TabLayoutExt(Context context) {
        super(context);
    }

    public TabLayoutExt(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public TabLayoutExt(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    protected void onAttachedToWindow() {
        //Cover the implicit setup in TabLayout
        if (mViewPager == null) {
            final ViewParent vp = getParent();
            if (vp instanceof ViewPager) {
                mViewPager = (ViewPager)vp;
            }

        }
        super.onAttachedToWindow();
    }

    public void addTab(@NonNull Tab tab, int position, boolean setSelected) {
        if (mViewPager != null && mViewPager.getAdapter() instanceof TabLayoutViewPagerAdapter) {
            Drawable icon = ((TabLayoutViewPagerAdapter) mViewPager.getAdapter()).getPageIcon(getContext(),position);
            tab.setIcon(icon);
        }
        super.addTab(tab,position,setSelected);

    }

    @Override
    public void setupWithViewPager(@Nullable ViewPager viewPager, boolean autoRefresh) {
        mViewPager = viewPager;
        super.setupWithViewPager(viewPager, autoRefresh);
    }
}

因此，要做的所有事情就是扩展TabLayoutViewPagerAdapter而不是扩展，PageAdapter并实现getPageIcon(Context,int)而不是title或在title之外实现。在下拉菜单TabLayoutExt中的XML文件，而不是正常，TabLayout。可以扩展它以进一步修改选项卡，或者使用自定义视图或其他方式。

Answer 8

通过材料组件库TabLayout提供的，您可以使用：

• setIcon定义resourceId的方法
• 的方法setTabLabelVisibility来设置TAB_LABEL_VISIBILITY_UNLABELED.

就像是：

for (int i=0;i<tabLayout.getTabCount();i++){

   tabLayout.getTabAt(i).setIcon(iconResId);
   tabLayout.getTabAt(i).
        setTabLabelVisibility(TabLayout.TAB_LABEL_VISIBILITY_UNLABELED);
}