TabLayout导航栏 Android MarginDesign控件TabLayout导航栏使用详解
ljngya 人气:0TabLayout的使用简单介绍
比如在平常的项目中实现这样的效果,一般都是都会使用viewPageIndicate等几个开源框架直接实现,或者使用自定义的HorizontalScroll再配合ViewPage+Fragment实现。在谷歌推出marginDesign之后,实现这种效果可以直接使用TabLayout实现。另外Tablayout可以通过自定义View自定义导航栏的效果。这样使用的时候更加灵活多变。
首先需要导入design包
在app的build.gradle下添加design的包
dependencies { compile 'com.android.support:design:25.0.1' }
然后就开始撸起袖子,开始如何使用
在xml文件里面写布局:
<?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:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <android.support.design.widget.TabLayout android:id="@+id/tabLayout" android:layout_width="match_parent" style="@style/MyCustomTabLayout" android:layout_height="wrap_content" /> <android.support.v4.view.ViewPager android:id="@+id/viewPager" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" /> </LinearLayout>
既然使用到了fragment,就免不了要添加下简单的布局:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical"> <TextView android:id="@+id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="默认" /> </RelativeLayout>
然后是fragment和FragmentPagerAdapter的代码。写过的人应该对这个很熟了,就直接粘下代码
public class FramentAdapter extends FragmentPagerAdapter { private String[] titles; public FramentAdapter(FragmentManager fm, String[] titles) { super(fm); this.titles = titles; } @Override public Fragment getItem(int position) { return PageFragment.newInstace(position,titles); } @Override public int getCount() { return titles.length; } @Override public CharSequence getPageTitle(int position) { return titles[position]; } }
Fragment的代码:
public class PageFragment extends Fragment { private int position; private String[] titles; private Context context; public static PageFragment newInstace(int position, String[] titles) { Bundle bundle = new Bundle(); bundle.putInt("POSITION", position); bundle.putStringArray("ARRAY", titles); PageFragment pageFragment = new PageFragment(); pageFragment.setArguments(bundle); return pageFragment; } @Override public void onAttach(Context context) { super.onAttach(context); this.context=context; } @Override public void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); position = getArguments().getInt("POSITION"); titles = getArguments().getStringArray("ARRAY"); } @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view =inflater.inflate(R.layout.item_layout,null); TextView textView = (TextView) view.findViewById(R.id.textView); textView.setText(titles[position]); return view; } }
写好这些之后最后在MainActivity中看下如何使用:
public class MainActivity extends FragmentActivity { private TabLayout tabLayout; private ViewPager viewPager; private String[] titles = {"黄蓉", "郭靖", "杨过", "小龙女", "尹志平", "金轮法王", "收到货就收到货圣诞节"}; private TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tabLayout = (TabLayout) findViewById(R.id.tabLayout); viewPager = (ViewPager) findViewById(R.id.viewPager); FramentAdapter framentAdapter = new FramentAdapter(getSupportFragmentManager(), titles); viewPager.setAdapter(framentAdapter); tabLayout.setupWithViewPager(viewPager); tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);} }
viewPager.setAdapter(framentAdapter);这行代码必须在下面这行代码之前。有兴趣的可以看下源码。 tabLayout.setupWithViewPager(viewPager);
另外 tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);给tablayout设置了这种模式,mode有两种,这种模式大概的意思是,我内容很多的时候,可以使tab平铺滑动。
很多时候我们需要自己自定义样式或者要自定义我们的tab。
自定义样式:
需要在Style文件下添加自己的样式,然后应用就好了,例如;
<style name="MyCustomTabLayout" parent="Widget.Design.TabLayout"> <item name="tabIndicatorColor">?attr/colorAccent</item> <item name="tabIndicatorHeight">2dp</item> <item name="tabPaddingStart">12dp</item> <item name="tabPaddingEnd">12dp</item> <item name="tabBackground">?attr/selectableItemBackground</item> <item name="tabTextAppearance">@style/MyCustomTabTextAppearance</item> <item name="tabSelectedTextColor">?android:textColorPrimary</item> </style> <style name="MyCustomTabTextAppearance" parent="TextAppearance.Design.Tab"> <item name="android:textSize">14sp</item> <item name="android:textColor">?android:textColorSecondary</item> <item name="textAllCaps">true</item> </style>
另外一种就是需要添加我们自定义的View:
首先写要定义的布局文件;
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="wrap_content" android:layout_height="wrap_content" android:orientation="horizontal"> <TextView android:id="@id/textView" android:layout_width="wrap_content" android:layout_height="wrap_content" android:gravity="center" /> <TextView android:layout_width="10dp" android:layout_height="10dp" android:background="@drawable/bg_text" /> </LinearLayout>
然后稍微修改下FragmentPagerAdapter的代码
public class FramentAdapter extends FragmentPagerAdapter { private String[] titles; public FramentAdapter(FragmentManager fm, String[] titles) { super(fm); this.titles = titles; } @Override public Fragment getItem(int position) { return PageFragment.newInstace(position,titles); } @Override public int getCount() { return titles.length; } @Override public CharSequence getPageTitle(int position) { return null; } }
最后看下怎么在MainActivity中使用。
public class MainActivity extends FragmentActivity { private TabLayout tabLayout; private ViewPager viewPager; private String[] titles = {"黄蓉", "郭靖", "杨过", "小龙女", "尹志平", "金轮法王", "收到货就收到货圣诞节"}; private TextView textView; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); tabLayout = (TabLayout) findViewById(R.id.tabLayout); viewPager = (ViewPager) findViewById(R.id.viewPager); FramentAdapter framentAdapter = new FramentAdapter(getSupportFragmentManager(), titles); viewPager.setAdapter(framentAdapter); tabLayout.setupWithViewPager(viewPager); tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE); for (int i = 0; i < tabLayout.getTabCount(); i++) { TabLayout.Tab tab = tabLayout.getTabAt(i); tab.setCustomView(getTabView(i)); } } private View getTabView(int position) { View view = View.inflate(this, R.layout.item_tab_view, null); textView = (TextView) view.findViewById(R.id.textView); textView.setText(titles[position]); return view; } }
到这里就结束了TabLayout的使用。放下源码:Tablayout的使用
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