本文实例为大家分享了Actionbar下拉式导航的实现代码,供大家参考,具体内容如下
利用Actionbar同样可以很轻松的实现下拉式的导航方式,若想实现这种效果:
1)actionbar.setNavigationMode(Actionbar.NAVIGATION_MODE_List)
2)setListNavigationCallbacks(SpinnerAdapter adapter,Actionbar.OnNavigationListener callback).
首先是创建一个Fragment类:
package ccom.app.main;import androID.annotation.Suppresslint;import androID.app.Fragment;import androID.content.Context;import androID.os.Bundle;import androID.vIEw.LayoutInflater;import androID.vIEw.VIEw;import androID.vIEw.VIEwGroup;import androID.vIEw.VIEwGroup.LayoutParams;import androID.Widget.TextVIEw;@Suppresslint("NewAPI")public class MyFragment extends Fragment { @OverrIDe public VIEw onCreateVIEw(LayoutInflater inflater,VIEwGroup container,Bundle savedInstanceState) { Context context = this.getActivity(); TextVIEw tv = new TextVIEw(context); Bundle arc = this.getArguments(); int tabs=arc.getInt("key"); tv.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT)); tv.setText("hello actionbar "+tabs); return tv; }}
main.xml:
<relativeLayout 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" tools:context=".Main" > <linearLayout androID:ID="@+ID/content" androID:layout_wIDth="match_parent" androID:layout_height="match_parent" androID:orIEntation="vertical" /></relativeLayout>
自定义的用于显示textvIEw的mytextvIEw.xml:
<?xml version="1.0" enCoding="utf-8"?><TextVIEw xmlns:androID="http://schemas.androID.com/apk/res/androID" androID:ID="@+ID/text1" androID:textcolor="#fff" androID:background="#696969" androID:layout_wIDth="60sp" androID:layout_height="match_parent" androID:textAppearance="?androID:attr/textAppearanceListItemSmall" androID:gravity="center_vertical" androID:paddingStart="?androID:attr/ListPreferredItempaddingStart" androID:minHeight="?androID:attr/ListPreferredItemHeightSmall"/>
Main.java
package ccom.app.main;import androID.annotation.Suppresslint;import androID.app.Actionbar;import androID.app.Activity;import androID.app.FragmentTransaction;import androID.os.Bundle;import androID.Widget.ArrayAdapter;@Suppresslint("NewAPI")public class Main extends Activity implements Actionbar.OnNavigationListener { Actionbar actionbar = null; @OverrIDe protected voID onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentVIEw(R.layout.main); actionbar = this.getActionbar(); actionbar.setdisplayShowTitleEnabled(true); actionbar.setNavigationMode(Actionbar.NAVIGATION_MODE_List); actionbar.setListNavigationCallbacks(new ArrayAdapter(Main.this,R.layout.mytextvIEw,R.ID.text1,new String[] { "tab1","tab2","tab3" }),this); } @OverrIDe public boolean onNavigationItemSelected(int itemposition,long itemID) { MyFragment mf = new MyFragment(); Bundle bundle = new Bundle(); bundle.putInt("key",itemposition + 1); mf.setArguments(bundle); FragmentTransaction action = this.getFragmentManager() .beginTransaction(); action.replace(R.ID.content,mf); action.commit(); return true; }}
实现的效果如图:
以上就是本文的全部内容,希望能给大家一个参考,也希望大家多多支持编程小技巧。
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