Android导航栏--ActionBar

package com.example.week4_day3_actionbar;

import android.os.Bundle;
import android.annotation.SuppressLint;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.view.Menu;

public class MainActivity extends Activity {

private ActionBar bar;
@SuppressLint("NewApi") @Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
bar=getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
Tab tab1=bar.newTab().setText("好友").setTabListener(new MyActionBar());
Tab tab2=bar.newTab().setText("家人").setTabListener(new MyActionBar());
Tab tab3=bar.newTab().setText("同学").setTabListener(new MyActionBar());
bar.addTab(tab1);
bar.addTab(tab2);
bar.addTab(tab3);

}

@SuppressLint("NewApi")
class MyActionBar implements ActionBar.TabListener{

//点击Actionbar时调用
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {

//生成Fragment类的对象
SecondActivity fragment=new SecondActivity();
//bundle传值
Bundle bundle=new Bundle();
bundle.putInt("index", tab.getPosition()+1);
//发送数据
fragment.setArguments(bundle);
//创建事务
FragmentTransaction manager=getFragmentManager().beginTransaction();
manager.replace(R.id.content, fragment);
//提交事务
manager.commit();

}

@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub

}

@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub

}

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}

package com.example.week4_day3_actionbar;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class SecondActivity extends Fragment {

private int index=0;
private TextView tv;

@Override
public void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);

Bundle bundle = getArguments();
index = bundle.getInt("index");
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.layout, null);
tv = (TextView) view.findViewById(R.id.tv);
switch (index) {
case 1:
tv.setText("好友列表为空");
break;
case 2:

tv.setText("家人在哪里");
break;
case 3:
tv.setText("同学都毕业了");
break;

default:
break;
}
return view;
}

}

<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:id="@+id/content" >

</RelativeLayout>

<?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"
android:orientation="vertical" >
<TextView
android:id="@+id/tv"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textColor="#00ff00"
/>

</LinearLayout>