Android ActionBar详解(5)->利用ActionBar结合Fragment实现Tab导航

Android ActionBar详解(五)--->利用ActionBar结合Fragment实现Tab导航

MainActivity如下:

package cc.testsimpleactionbar4;import android.os.Bundle;import android.app.ActionBar;import android.app.Activity;import android.app.ActionBar.Tab;import android.app.ActionBar.TabListener;import android.app.FragmentTransaction;/** * Demo描述: * 利用ActionBar结合Fragment实现Tab导航. * 当选中不同的Tab时利用Fragment显示不同的内容 *  * 参考资料: * 1 Android疯狂讲义(第二版) *   Thank you very much * */public class MainActivity extends Activity {     private ActionBar mActionBar;     private final static String SELECTED_TAB_INDEX="selected_tab";@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);initActionBar();}private void initActionBar(){mActionBar=getActionBar();//设置导航方式为TabmActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);Tab tab1=mActionBar.newTab();tab1.setText("第一页");tab1.setTabListener(new TabListenerImpl());mActionBar.addTab(tab1);Tab tab2=mActionBar.newTab();tab2.setText("第二页");tab2.setTabListener(new TabListenerImpl());mActionBar.addTab(tab2);Tab tab3=mActionBar.newTab();tab3.setText("第三页");tab3.setTabListener(new TabListenerImpl());mActionBar.addTab(tab3);}private class TabListenerImpl implements TabListener{@Overridepublic void onTabReselected(Tab arg0, FragmentTransaction arg1) {}@Overridepublic void onTabSelected(Tab tab, FragmentTransaction transaction) {System.out.println(" onTabSelected ");TestFragment testFragment=new TestFragment();Bundle bundle=new Bundle();bundle.putString(TestFragment.KEY, "这是第"+(tab.getPosition()+1)+"个Tab");testFragment.setArguments(bundle);FragmentTransaction fragmentTransaction=getFragmentManager().beginTransaction();fragmentTransaction.replace(R.id.relativeLayoutContainer, testFragment);fragmentTransaction.commit();}@Overridepublic void onTabUnselected(Tab arg0, FragmentTransaction arg1) {}}//以下处理横竖屏的切换//将当前选中的Tab页的索引保存到Bundle中@Overrideprotected void onSaveInstanceState(Bundle bundle) {super.onSaveInstanceState(bundle);bundle.putInt(SELECTED_TAB_INDEX, mActionBar.getSelectedNavigationIndex());}//获取已经保存的被选中Tab页的索引,且设置ActionBar.//setSelectedNavigationItem()方法会调用onTabSelected()@Overrideprotected void onRestoreInstanceState(Bundle bundle) {super.onRestoreInstanceState(bundle);mActionBar.setSelectedNavigationItem(bundle.getInt(SELECTED_TAB_INDEX));}}

TestFragment如下:

package cc.testsimpleactionbar4;import android.app.Fragment;import android.os.Bundle;import android.view.Gravity;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class TestFragment extends Fragment {public static final String KEY="key";@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {TextView textView=new TextView(getActivity());textView.setGravity(Gravity.CENTER);Bundle bundle=this.getArguments();String content=bundle.getString(KEY);textView.setText(content);textView.setTextSize(30);return textView;}}

main.xml如下:

<RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/relativeLayoutContainer"    android:layout_width="match_parent"    android:layout_height="match_parent"    ></RelativeLayout>