我已经在我的项目中成功实现了actionsherlock。所以这是我的代码：
public class ActiontabActivity extends SherlockFragmentActivity {
ActionMode mMode;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTheme(R.style.Theme_Sherlock_Light_DarkActionBar);
setContentView(R.layout.main);
ActionBar bar = getSupportActionBar();
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
bar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
bar.setDisplayOptions(0, ActionBar.DISPLAY_SHOW_TITLE);
bar.setDisplayShowHomeEnabled(false);
bar.setDisplayShowTitleEnabled(false);
bar.setTitle("Currency Exchange");
bar.addTab(bar
.newTab()
.setText("Converter")
.setTabListener(
new TabListener<Fragment>(this, "Converter",
ConverterTab.class, null)));
bar.addTab(bar
.newTab()
.setText("Favorites")
.setTabListener(
new TabListener1<Fragment>(this, "Favorites",
FavoritesTab.class, null)));
if (savedInstanceState != null) {
bar.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
}
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
outState.putInt("tab", getSupportActionBar()
.getSelectedNavigationIndex());
}
public class TabListener<T extends Fragment> implements ActionBar.TabListener {
private final FragmentActivity mActivity;
private final String mTag;
private final Class<ConverterTab> mClass;
private final Bundle mArgs;
private Fragment mFragment;
public TabListener(FragmentActivity activity, String tag, Class<ConverterTab> clz, Bundle args) {
mActivity = activity;
mTag = tag;
mClass = clz;
mArgs = args;
FragmentTransaction ft = mActivity.getSupportFragmentManager().beginTransaction();
// Check to see if we already have a fragment for this tab, probably
// from a previously saved state. If so, deactivate it, because our
// initial state is that a tab isn't shown.
mFragment = mActivity.getSupportFragmentManager().findFragmentByTag(mTag);
if (mFragment != null && !mFragment.isDetached()) {
ft.detach(mFragment);
}
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
ft = mActivity.getSupportFragmentManager()
.beginTransaction();
if (mFragment == null) {
mFragment = Fragment.instantiate(mActivity, mClass.getName(),
mArgs);
ft.add(android.R.id.content, mFragment, mTag);
ft.commit();
} else {
ft.attach(mFragment);
ft.commit();
}
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
if (mFragment != null) {
//this segment removes the back history of everything in the tab you are leaving so when you click on the tab again you go back to a fresh start
FragmentManager man = mFragment.getFragmentManager();
if(man.getBackStackEntryCount()>0) //this check is required to prevent null point exceptions when clicking off of a tab with no history
man.popBackStack(man.getBackStackEntryAt(0).getName(), FragmentManager.POP_BACK_STACK_INCLUSIVE); //this pops the stack back to index 0 so you can then detach and then later attach your initial fragment
//also it should be noted that if you do popbackstackimmediate here instead of just popbackstack you will see a flash as the gui changes back to the first fragment when the code executes
//end
ft.detach(mFragment);
}
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
public class TabListener1<T extends Fragment> implements ActionBar.TabListener {
private final FragmentActivity mActivity;
private final String mTag;
private final Class<FavoritesTab> mClass;
private final Bundle mArgs;
private Fragment mFragment;
public TabListener1(FragmentActivity activity, String tag, Class<FavoritesTab> clz, Bundle args) {
mActivity = activity;
mTag = tag;
mClass = clz;
mArgs = args;
FragmentTransaction ft = mActivity.getSupportFragmentManager().beginTransaction();
// Check to see if we already have a fragment for this tab, probably
// from a previously saved state. If so, deactivate it, because our
// initial state is that a tab isn't shown.
mFragment = mActivity.getSupportFragmentManager().findFragmentByTag(mTag);
if (mFragment != null && !mFragment.isDetached()) {
ft.detach(mFragment);
}
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
ft = mActivity.getSupportFragmentManager()
.beginTransaction();
if (mFragment == null) {
mFragment = Fragment.instantiate(mActivity, mClass.getName(),
mArgs);
ft.add(android.R.id.content, mFragment, mTag);
ft.commit();
} else {
ft.attach(mFragment);
ft.commit();
}
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
if (mFragment != null) {
//this segment removes the back history of everything in the tab you are leaving so when you click on the tab again you go back to a fresh start
FragmentManager man = mFragment.getFragmentManager();
if(man.getBackStackEntryCount()>0) //this check is required to prevent null point exceptions when clicking off of a tab with no history
man.popBackStack(man.getBackStackEntryAt(0).getName(), FragmentManager.POP_BACK_STACK_INCLUSIVE); //this pops the stack back to index 0 so you can then detach and then later attach your initial fragment
//also it should be noted that if you do popbackstackimmediate here instead of just popbackstack you will see a flash as the gui changes back to the first fragment when the code executes
//end
ft.detach(mFragment);
}
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
}
我在转换器选项卡中放了一个按钮，在收藏夹选项卡中放了一个复选框。但是现在我想当我运行我的应用程序时，它最初没有选择任何选项卡。只显示主屏幕，当我按下任何选项卡时，它会显示它的内容。因为最初我想在未选择选项卡时显示其他内容。请告诉我我该怎么做？请告诉我如何显示最初的主屏幕，然后当我选择任何选项卡时它会显示其内容。我附上了我的图片项目：
