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TabLayout
可以方便的实现导航标签功能,它需要与ViewPager
联合使用,ViewPager
加载适配器,TabLayout
加载ViewPager
。
使用前需要先导入desgin包。
属性
app:tabIndicatorColor="@color/white" // 下方滚动的下划线颜色
app:tabSelectedTextColor="@color/gray" // tab被选中后,文字的颜色
app:tabTextColor="@color/white" // tab默认的文字颜色
几个关键方法
mTabLayout.setTabMode(TabLayout.MODE_FIXED); //设置TabLayout的标签模式
mTabLayout.addTab(); //为TabLayout添加标签
mTabLayout.setupWithViewPager(); //为TabLayout添加ViewPager
下面在实例中介绍
activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
tools:context="com.icechen.tablayoutdemo.MainActivity">
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:tabTextColor="#252525"
app:tabSelectedTextColor="#ff7473"
app:tabIndicatorColor="#d09ec6"
>
</android.support.design.widget.TabLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewPager"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1">
</android.support.v4.view.ViewPager>
</LinearLayout>
activity.java
public class MainActivity extends AppCompatActivity {
private TabLayout mTabLayout;
private ViewPager mViewPager;
private String[] titles = {"最新","一周最热","买买买","读书","设计","文艺","礼物","指南","爱美"};
private FragmentManager fragmentManager;
private List<Fragment> fragments = new ArrayList<>();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
fragmentManager = getSupportFragmentManager();
for (int i = 0; i < titles.length; i++) {
fragments.add(Fragment1.newInstance(""+i));
}
initView();
}
private void initView() {
mTabLayout = (TabLayout) findViewById(R.id.tabLayout);
mViewPager = (ViewPager) findViewById(R.id.viewPager);
for (int i = 0; i < titles.length; i++) {
//设置tab的标题
mTabLayout.addTab(mTabLayout.newTab().setText(titles[i]));
}
mViewPager.setAdapter(new FragmentPagerAdapter(fragmentManager) {
@Override
public Fragment getItem(int position) {
return fragments.get(position);
}
@Override
public int getCount() {
return fragments.size();
}
//使用Fragment需要指定好tab
@Override
public CharSequence getPageTitle(int position) {
return titles[position % titles.length];
}
});
//MODE_SCROLLABLE:可以滚动
//MODE_FIXED:会适配到屏幕
mTabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);
//将ViewPager加载到TabLayout中,使它们能够联动
mTabLayout.setupWithViewPager(mViewPager);
}
}
fragment.java
public class Fragment1 extends Fragment {
public static Fragment1 newInstance(String content) {
Bundle args = new Bundle();
args.putString("content",content);
Fragment1 fragment = new Fragment1();
fragment.setArguments(args);
return fragment;
}
@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_tab,container,false);
}
@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
((TextView)(getView().findViewById(R.id.content))).setText(getArguments().getString("content"));
}
}
效果
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