Android 中ActionBar+fragment实现页面导航的实例
为保证android2.0以上均能运行，使用support.v7库下的actionbar及fragment
继承自AppCompatActivity（ActionBarActivity已过时）使用getSupportActionBar()得到ActionBar，
ActionBar.Tab，这里Tab必须设置监听，在监听中实现Fragment的切换。
这里重点提一下，Theme主题一定要适配，因为我使用的是AppCompatActivity所以，
android:theme="@style/Theme.AppCompat.Light"
如果不用AppCompatActivity一定要注意使用相应的主题适配，否则会getActionBar/getSupportActionbar的时候拿不到东西，空指针报错
<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" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity"> <FrameLayout android:id="@+id/context" android:layout_width="match_parent" android:layout_height="match_parent"/> </RelativeLayout> package com.example.yasin.actionbarusing; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.support.v7.app.AppCompatActivity; import android.util.Log; import android.view.View; public class MainActivity extends AppCompatActivity { ActionBar actionBar; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); actionBar = getSupportActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); ActionBar.Tab tab1 = actionBar.newTab().setText("Tab1"); tab1.setTabListener(new MyTabListener(new Fragment1())); ActionBar.Tab tab2 = actionBar.newTab().setText("Tab2"); tab2.setTabListener(new MyTabListener(new Fragment2())); actionBar.addTab(tab1); actionBar.addTab(tab2); } class MyTabListener implements ActionBar.TabListener{ private Fragment fragment; public MyTabListener (Fragment fragment){ this.fragment=fragment; } @Override public void onTabSelected(ActionBar.Tab tab, FragmentTransaction ft) { ft.replace(R.id.context,fragment); } @Override public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction ft) { } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction ft) { //ft.remove(fragment); } } } <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <TextView android:id="@+id/tv1" android:text="fragment1" android:layout_width="wrap_content" android:layout_height="wrap_content" /> </LinearLayout>
package com.example.yasin.actionbarusing; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; /** * Created by Yasin on 2016/1/3. */ public class Fragment1 extends Fragment{ @Nullable @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.fragment1,container,false); return view; } } <?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.yasin.actionbarusing" > <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/Theme.AppCompat.Light" > <activity android:name=".MainActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
效果图：
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