上一篇文章介绍了ActionBar的使用,这里介绍ActionBar的另一种使用方法,达到的效果和以前的GroupActivity或TabHost是一样的,可作为导航来使用。
实现效果图:
源代码:
布局文件:activity_main:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity"
android:background="@android:color/white">
</RelativeLayout>
f1.xml(体育新闻对应的布局文件):
<LinearLayout 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:orientation="vertical"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="欢迎收看体育新闻..."
android:textSize="20sp"
android:textColor="@android:color/holo_blue_dark"/>
<RatingBar
android:id="@+id/ratingBar1"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</LinearLayout>
f2.xml(娱乐新闻):
<LinearLayout 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"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="欢迎收看娱乐新闻..."
android:textColor="@android:color/holo_green_dark"
android:textSize="20sp" />
</LinearLayout>
f3.xml(军事新闻):
<LinearLayout 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"
tools:context=".MainActivity" >
<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal"
android:text="欢迎收看军事新闻..."
android:textColor="@android:color/holo_orange_dark"
android:textSize="20sp" />
</LinearLayout>
代码文件:
MainActivity:
package com.fragmentdemo10_actionbar;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.ActionBar.TabListener;
import android.app.Activity;
import android.app.FragmentTransaction;
import android.os.Bundle;
public class MainActivity extends Activity {
private ActionBar actionBar;
/**
* 设置三个整型常量,分别为0,1,2;分别对应 :运动新闻、娱乐新闻、军事新闻。
*/
private final int SPORTS = 0;
private final int ENTERTAINMENT = 1;
private final int MILITARY = 2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
actionBar = getActionBar();
// 设置ActionBar的导航模式
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
actionBar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);
/**
* 添加三个tab,分别为:体育新闻,娱乐新闻,军事新闻。
*/
actionBar.addTab(actionBar.newTab().setText("体育新闻")
.setIcon(R.drawable.ic_launcher)
.setTabListener(new MyTabListener()).setTag(SPORTS));
actionBar.addTab(actionBar.newTab().setText("娱乐新闻")
.setIcon(R.drawable.ic_launcher)
.setTabListener(new MyTabListener()).setTag(ENTERTAINMENT));
actionBar.addTab(actionBar.newTab().setText("军事新闻")
.setIcon(R.drawable.ic_launcher)
.setTabListener(new MyTabListener()).setTag(MILITARY));
}
class MyTabListener implements TabListener {
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
switch (Integer.parseInt(tab.getTag().toString())) {
/**
* 对应体育新闻
*/
case SPORTS:
ft.replace(R.id.main, new FragementA());
break;
/**
* 对应娱乐新闻
*/
case ENTERTAINMENT:
ft.replace(R.id.main, new FragementB());
break;
/**
* 对应军事新闻
*/
case MILITARY:
ft.replace(R.id.main, new FragementC());
break;
default:
break;
}
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
}
}
FragmentA(Tab体育新闻对应的Fragment):
package com.fragmentdemo10_actionbar;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* Tab体育新闻对应的Fragment
*
*/
public class FragementA extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.f1, null);
return view;
}
}
FragmentB(Tab娱乐新闻对应的Fragment):
package com.fragmentdemo10_actionbar;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* TAB娱乐新闻对应的Fragment
*
*/
public class FragementB extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.f2, null);
return view;
}
}
FragmentC(Tab军事新闻对应的Fragment):
package com.fragmentdemo10_actionbar;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
/**
* TAB军事新闻对应的Fragment
*
*/
public class FragementC extends Fragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.f3, null);
return view;
}
}
源代码下载:
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