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:
自定义的用于显示textview的mytextview.xml:
<&#63;xml version="1.0" encoding="utf-8"&#63;>
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。