我正在尝试3.0的
android操作栏,我参考
http://www.youtube.com/watch?v=gMu8XhxUBl8
TabsActivity中的代码如下：
package com.test.actionbar;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
public class TabsActivity extends Activity{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ActionBar bar = getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tabA = bar.newTab().setText("A Tab");
ActionBar.Tab tabB = bar.newTab().setText("B Tab");
ActionBar.Tab tabC = bar.newTab().setText("C Tab");
Fragment fragmentA = new AFragmentTab();
Fragment fragmentB = new BFragmentTab();
Fragment fragmentC = new CFragmentTab();
tabA.setTabListener(new MyTabsListener(fragmentA));
tabB.setTabListener(new MyTabsListener(fragmentB));
tabC.setTabListener(new MyTabsListener(fragmentC));
bar.addTab(tabA);
bar.addTab(tabB);
bar.addTab(tabC);
}
protected class MyTabsListener implements ActionBar.TabListener {
private Fragment fragment;
public MyTabsListener(Fragment fragment) {
this.fragment = fragment;
}
public void onTabReselected(Tab tab,FragmentTransaction ft) {
// TODO Auto-generated method stub
}
public void onTabSelected(Tab tab,FragmentTransaction ft) {
// TODO Auto-generated method stub
ft.add(R.id.fragment_container,fragment,null);
}
public void onTabUnselected(Tab tab,FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
}
但是,对于一步一步的教程,在完成本教程之后,我意识到在TabsActivity中,在onTabSelected方法中,它将需要一个变量即container_id,我不太确定即使在查看之后我也能提供它在api.我尝试删除该行并在平板电脑上运行它,但它抛出了一个runtimeexception.
谁能帮我这个？
对不起,我是Android编程的新手,如果问题听起来太简单了.
提前致谢.
编辑
import android.app.ActionBar;
import android.app.Activity;
import android.app.Fragment;
import android.os.Bundle;
public class ActionBarTabs extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ActionBar bar = getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tabA = bar.newTab().setText("A Tab");
ActionBar.Tab tabB = bar.newTab().setText("B Tab");
ActionBar.Tab tabC = bar.newTab().setText("C Tab");
bar.addTab(tabA);
bar.addTab(tabB);
bar.addTab(tabC);
}
}
UPDATE
package com.debug.actionbartabs;
import android.app.ActionBar;
import android.app.Activity;
import android.os.Bundle;
public class TabsActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ActionBar bar = getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tabA = bar.newTab().setText("A Tab");
bar.addTab(tabA);
}
}
解决方法
每个类应如下所示：
public class AFragmentTab extends Fragment
{
@Override
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState)
{
return inflater.inflate(R.layout.fragment_a,container,false);
}
}
主要活动应如下所示：
package com.test.actionbar;
import android.app.ActionBar;
import android.app.ActionBar.Tab;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
public class TabsActivity extends Activity{
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ActionBar bar = getActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
ActionBar.Tab tabA = bar.newTab().setText("A Tab");
ActionBar.Tab tabB = bar.newTab().setText("B Tab");
ActionBar.Tab tabC = bar.newTab().setText("C Tab");
Fragment fragmentA = new AFragmentTab();
Fragment fragmentB = new BFragmentTab();
Fragment fragmentC = new CFragmentTab();
tabA.setTabListener(new MyTabsListener(fragmentA));
tabB.setTabListener(new MyTabsListener(fragmentB));
tabC.setTabListener(new MyTabsListener(fragmentC));
bar.addTab(tabA);
bar.addTab(tabB);
bar.addTab(tabC);
}
protected class MyTabsListener implements ActionBar.TabListener {
private Fragment fragment;
public MyTabsListener(Fragment fragment) {
this.fragment = fragment;
}
public void onTabReselected(Tab tab,FragmentTransaction ft) {
}
public void onTabSelected(Tab tab,FragmentTransaction ft) {
ft.add(R.id.fragment_container,null);
}
public void onTabUnselected(Tab tab,FragmentTransaction ft) {
// some people needed this line as well to make it work:
ft.remove(fragment);
}
}
我刚刚在这里找到了他的代码的副本：http://www.abelski.com/courses/android3ui/actionbar.pdf> _<
所以在main.xml中看起来像这样：
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" > <LinearLayout android:layout_height="wrap_content" android:layout_width="match_parent" android:id="@+id/fragment_container"></LinearLayout> </LinearLayout>
