所以我使用Tabs并寻求这种导航：
tab1 – >在1 – > inside2
tab2 – >里面3 – >里面4
tab3 – >里面5
我的意思是它应该打开一个新的布局和类.
我的项目主要是这样的：
public class TabsFragmentActivity extends SherlockFragmentActivity implements
TabHost.OnTabChangeListener {
private TabHost mTabHost;
private HashMap<String,TabInfo> mapTabInfo = new HashMap<String,TabInfo>();
private TabInfo mLastTab = null;
private static Context mContext;
private class TabInfo {
private String tag;
private Class clss;
private Bundle args;
private Fragment fragment;
TabInfo(String tag,Class clazz,Bundle args) {
this.tag = tag;
this.clss = clazz;
this.args = args;
}
}
class TabFactory implements TabContentFactory {
private final Context mContext;
public TabFactory(Context context) {
mContext = context;
}
public View createTabContent(String tag) {
View v = new View(mContext);
v.setMinimumWidth(0);
v.setMinimumHeight(0);
return v;
}
}
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// Step 1: Inflate layout
setContentView(R.layout.tabs_fragment_activity);
mContext = this;
// Step 2: Setup TabHost
initialiseTabHost(savedInstanceState);
if (savedInstanceState != null) {
mTabHost.setCurrentTabByTag(savedInstanceState.getString("tab"));
}
addNavaigationBar();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//Add Action item with title
menu.add("some")
.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
return super.onCreateOptionsMenu(menu);
}
public void addNavaigationBar() {
// Create Action Bar sherlock
ActionBar navigation_bar = getSupportActionBar();
// Setting standart navigation bar view
navigation_bar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
navigation_bar.setDisplayShowTitleEnabled(true);
navigation_bar.setTitle("Test");
// Override Action items to navigation bar. Calls onCreateOptionsMenu
// invalidateOptionsMenu();
}
protected void onSaveInstanceState(Bundle outState) {
outState.putString("tab",mTabHost.getCurrentTabTag()); // save the tab
// selected
super.onSaveInstanceState(outState);
}
/**
* Step 2: Setup TabHost
*/
private void initialiseTabHost(Bundle args) {
mTabHost = (TabHost) findViewById(android.R.id.tabhost);
mTabHost.setup();
TabInfo tabInfo = null;
TabsFragmentActivity.addTab(this,this.mTabHost,this.mTabHost
.newTabSpec("Tab1").setIndicator("Tab 1"),(tabInfo = new TabInfo("Tab1",Tab1Fragment.class,args)));
this.mapTabInfo.put(tabInfo.tag,tabInfo);
TabsFragmentActivity.addTab(this,this.mTabHost
.newTabSpec("Tab2").setIndicator("Tab 2"),(tabInfo = new TabInfo("Tab2",Tab2Fragment.class,tabInfo);
TabsFragmentActivity.addTab(this,this.mTabHost
.newTabSpec("Tab3").setIndicator("Tab 3"),(tabInfo = new TabInfo("Tab3",Tab3Fragment.class,tabInfo);
// Default to first tab
this.onTabChanged("Tab1");
//
mTabHost.setOnTabChangedListener(this);
}
private static void addTab(TabsFragmentActivity activity,TabHost tabHost,TabHost.TabSpec tabSpec,TabInfo tabInfo) {
// Attach a Tab view factory to the spec
tabSpec.setContent(activity.new TabFactory(activity));
String tag = tabSpec.getTag();
//getTabWidget()
View view = prepareTabView(activity,R.id.tab_bar_icon);
tabSpec.setIndicator(view);
// 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.
tabInfo.fragment = activity.getSupportFragmentManager().findFragmentByTag(tag);
if (tabInfo.fragment != null && !tabInfo.fragment.isDetached()) {
FragmentTransaction ft = activity.getSupportFragmentManager().beginTransaction();
ft.detach(tabInfo.fragment);
ft.commit();
activity.getSupportFragmentManager().executePendingTransactions();
}
tabHost.addTab(tabSpec);
}
private static View prepareTabView(Context context,int drawable){
//inflate(R.layout.tab_indicator,android.R.id.tabs,false)
View tabIndicator = LayoutInflater.from(context).inflate(R.layout.tab_indicator,null);
ImageView icon = (ImageView) tabIndicator.findViewById(R.id.tab_bar_icon);
icon.setImageResource(R.drawable.ic_launcher);
return tabIndicator;
}
public void onTabChanged(String tag) {
TabInfo newTab = this.mapTabInfo.get(tag);
if (mLastTab != newTab) {
FragmentTransaction ft = this.getSupportFragmentManager()
.beginTransaction();
if (mLastTab != null) {
if (mLastTab.fragment != null) {
ft.detach(mLastTab.fragment);
}
}
if (newTab != null) {
if (newTab.fragment == null) {
newTab.fragment = Fragment.instantiate(this,newTab.clss.getName(),newTab.args);
ft.add(R.id.realtabcontent,newTab.fragment,newTab.tag);
} else {
ft.attach(newTab.fragment);
}
}
mLastTab = newTab;
ft.commit();
this.getSupportFragmentManager().executePendingTransactions();
}
}
}
这会创建3个标签与内容.这里是如何看Tab1片段类(其他看起来相似)：
public class Tab1Fragment extends SherlockFragment {
public View onCreateView(LayoutInflater inflater,ViewGroup container,Bundle savedInstanceState) {
if (container == null) {
// We have different layouts,and in one of them this
// fragment's containing frame doesn't exist. The fragment
// may still be created from its saved state,but there is
// no reason to try to create its view hierarchy because it
// won't be displayed. Note this is not needed -- we could
// just run the code below,where we would create and return
// the view hierarchy; it would just never be used.
return null;
}
LinearLayout theLayout = (LinearLayout)inflater.inflate(R.layout.tab_frag1_layout,container,false);
// Register for the Button.OnClick event
Button b = (Button)theLayout.findViewById(R.id.frag1_button);
b.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
**//Here i want open a new window but don't change pressed tab and when press back it should go back at this window**
}
});
return theLayout;
}
}
我按下按钮,按我想要的.
我不能在这个片段中打开一个新的片段或活动？
我应该怎么做导航片段？
解决方法
我喜欢让我的主机Activity处理所有的转换,所以我在我的片段中做的是创建一个接口来处理导航.例如,您可以将此界面添加到Tab1Fragment中：
public interface Callback {
public void onButtonBClicked();
}
然后在TabsFragmentActivity中,实现Tab1Fragment.Callback,这将需要您实现onButtonBClicked().以下是您如何实现此方法的示例：
@Override
public void onButtonBClicked() {
Fragment anotherFragment = Fragment.instantiate(this,AnotherFragment.class.getName());
FragmentTransaction ft = getFragmentManager().beginTransaction();
ft.add(R.id.realtabcontent,anotherFragment);
ft.addToBackStack(null);
ft.commit();
}
几乎完成了接下来,您需要做的是在片段中获取对此回调的引用.这通常在onAttached()方法中实现.例如：
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
try {
mCallback = (Callback) activity;
}
catch (ClassCastException e) {
throw new ClassCastException(activity.toString() + " must implement " + Callback.class.getName());
}
}
最后,在你的OnClickListener中,调用mCallback.onButtonBClicked().
