TabLayout的使用簡單介紹

比如在平常的項目中實現這樣的效果,一般都是都會使用viewPageIndicate等幾個開源框架直接實現,或者使用自定義的HorizontalScroll再配合ViewPage+Fragment實現。在谷歌推出marginDesign之后,實現這種效果可以直接使用TabLayout實現。另外Tablayout可以通過自定義View自定義導航欄的效果。這樣使用的時候更加靈活多變。
首先需要導入design包
在app的build.gradle下添加design的包
dependencies { compile 'com.android.support:design:25.0.1' }然后就開始擼起袖子,開始如何使用
在xml文件里面寫布局:
<?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,就免不了要添加下簡單的布局:
<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="默認" /> </RelativeLayout>
然后是fragment和FragmentPagerAdapter的代碼。寫過的人應該對這個很熟了,就直接粘下代碼
public class FramentAdapter extends FragmentPagerAdapter {private String[] titles;public FramentAdapter(FragmentManager fm, String[] titles) { super(fm); this.titles = titles;}@Overridepublic Fragment getItem(int position) { return PageFragment.newInstace(position,titles);}@Overridepublic int getCount() { return titles.length;}@Overridepublic CharSequence getPageTitle(int position) { return titles[position];}}Fragment的代碼:
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;}@Overridepublic void onAttach(Context context) { super.onAttach(context); this.context=context;}@Overridepublic void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); position = getArguments().getInt("POSITION"); titles = getArguments().getStringArray("ARRAY");}@Nullable@Overridepublic 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;}}寫好這些之后最后在MainActivity中看下如何使用:
public class MainActivity extends FragmentActivity {private TabLayout tabLayout;private ViewPager viewPager;private String[] titles = {"黃蓉", "郭靖", "楊過", "小龍女", "尹志平", "金輪法王", "收到貨就收到貨圣誕節"};private TextView textView;@Overrideprotected 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);這行代碼必須在下面這行代碼之前。有興趣的可以看下源碼。 tabLayout.setupWithViewPager(viewPager);
另外 tabLayout.setTabMode(TabLayout.MODE_SCROLLABLE);給tablayout設置了這種模式,mode有兩種,這種模式大概的意思是,我內容很多的時候,可以使tab平鋪滑動。
很多時候我們需要自己自定義樣式或者要自定義我們的tab。
自定義樣式:
需要在Style文件下添加自己的樣式,然后應用就好了,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>
另外一種就是需要添加我們自定義的View:
首先寫要定義的布局文件;
<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的代碼
public class FramentAdapter extends FragmentPagerAdapter {private String[] titles;public FramentAdapter(FragmentManager fm, String[] titles) { super(fm); this.titles = titles;}@Overridepublic Fragment getItem(int position) { return PageFragment.newInstace(position,titles);}@Overridepublic int getCount() { return titles.length;}@Overridepublic 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 = {"黃蓉", "郭靖", "楊過", "小龍女", "尹志平", "金輪法王", "收到貨就收到貨圣誕節"};private TextView textView;@Overrideprotected 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;}}到這里就結束了TabLayout的使用。放下源碼:Tablayout的使用
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支持武林網。
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