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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