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Google在2015的IO大会上，给我们带来了更加详细的Material Design设计规范，同时，也给我们带来了全新的Android Design Support Library，在这个support库里面，Google给我们提供了更加规范的MD设计风格的控件。最重要的是，Android Design Support Library的兼容性更广，直接可以向下兼容到Android 2.2。
这两天需要做一个仿京东详情的页面，上面的Tab切换，以前都是自己写Viewpager+fragment，或者Indicator的深度定制，一直想尝试一下TabLayout，于是就有了下面的坑。
然后下面是我简单的实现效果（个人觉得很坑，还不如自己自定义的导航器）
添加引用库
dependencies {
compile fileTree(dir: ‘libs‘, include: [‘*.jar‘])
compile ‘com.android.support:appcompat-v7:24.2.0‘
compile ‘com.android.support:design:24.2.0‘
compile ‘com.android.support:recyclerview-v7:24.2.0‘
compile ‘com.android.support:cardview-v7:24.2.0‘
}<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/c12" android:gravity="center_vertical" android:minHeight="45dp" android:orientation="horizontal" android:paddingLeft="15dp" android:paddingRight="15dp"> <ImageView android:id="@+id/back" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/back_icon" /> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:orientation="horizontal"> <android.support.design.widget.TabLayout android:id="@+id/tabLayout" android:layout_width="match_parent" android:layout_height="match_parent" app:tabTextAppearance="@style/TabLayoutTextStyle" app:tabGravity="center" app:tabMode="fixed" app:tabTextColor="@color/c7" app:tabSelectedTextColor="@color/c8"/> </LinearLayout> <ImageView android:id="@+id/toolbar_more" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:background="@drawable/more_icon" /> </LinearLayout> <View style="@style/horizontal_line" /> <android.support.v4.view.ViewPager android:id="@+id/viewPager" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" /> <View style="@style/horizontal_line" /> <LinearLayout android:layout_width="match_parent" android:layout_height="48dp" android:background="@color/c12" android:orientation="horizontal"> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1"> <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:text="收藏" android:textSize="10sp" /> <View style="@style/vertical_line" /> <TextView android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1" android:gravity="center" android:text="购物车" android:textSize="10sp" /> </LinearLayout> <LinearLayout android:layout_width="0dp" android:layout_height="match_parent" android:layout_weight="1.5" android:background="@color/c8" android:gravity="center"> <TextView style="@style/style_c12_s16" android:gravity="center" android:text="加入购物车" /> </LinearLayout> </LinearLayout> </LinearLayout>
public class ProductDetailPagerAdapter extends FragmentPagerAdapter {
private List<Fragment> mFragments=null;
private List<String> mTitles=null;
public ProductDetailPagerAdapter(FragmentManager fm, List<Fragment> mFragments,List<String> mTitles) {
super(fm);
this.mFragments =mFragments;
this.mTitles=mTitles;
}
public ProductDetailPagerAdapter(FragmentManager fm, Fragment... fragments) {
super(fm);
this.mFragments = Arrays.asList(fragments);
}
@Override
public Fragment getItem(int position) {
return mFragments.get(position);
}
@Override
public int getCount() {
return mFragments.size();
}
@Override
public CharSequence getPageTitle(int position) {
return mTitles.get(position);
}
}上面的代码都比较简单不做过多的解释，在使用TabLayout的时候需要注意一点：public class ProductDetailsActivity extends BaseActivity { @BindView(R.id.viewPager) ViewPager viewPager; @BindView(R.id.toolbar_more) ImageView toolbarMore; @BindView(R.id.tabLayout) TabLayout tabLayout; private List<Fragment> mFragments; private String[] titles = new String[]{"商品", "详情"}; private ProductDetailPagerAdapter productPagerAdapter = null; private MorePopupWindow popupWindow = null; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_product_details); ButterKnife.bind(this); init(); } private void init() { initViewPager(); } private void initViewPager() { mFragments = new ArrayList<>(); mFragments.add(new ProductFragment()); mFragments.add(new ProductDetailFragment()); productPagerAdapter = new ProductDetailPagerAdapter(getSupportFragmentManager(), mFragments, Arrays.asList(titles)); viewPager.setOffscreenPageLimit(2); viewPager.setAdapter(productPagerAdapter); viewPager.setCurrentItem(1); tabLayout.setupWithViewPager(viewPager); } @OnClick(R.id.back) public void backClick() { finish(); } @OnClick(R.id.toolbar_more) public void moreClick() { } private AdapterView.OnItemClickListener onItemClickListener = new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { popupWindow.dismiss(); } }; public static void open(Context context) { Intent intent = new Intent(context, ProductDetailsActivity.class); context.startActivity(intent); } }
app:tabTextAppearance=""
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;
}<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>@Override
public CharSequence getPageTitle(int position) {
// Generate title based on item position
Drawable image = context.getResources().getDrawable(imageResId[position]);
image.setBounds(0, 0, image.getIntrinsicWidth(), image.getIntrinsicHeight());
// Replace blank spaces with image icon
SpannableString sb = new SpannableString(" " + tabTitles[position]);
ImageSpan imageSpan = new ImageSpan(image, ImageSpan.ALIGN_BOTTOM);
sb.setSpan(imageSpan, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
return sb;
}
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原文地址：http://blog.csdn.net/xiangzhihong8/article/details/52369483
