9
所以我使用的标签,寻求这种导航:如何在碎片中导航?
TAB1 - >内1 - > inside2
TAB2 - >内3 - >内4
TAB3 - - >里面5
里面我的意思是它应该打开一个新的布局和类。
我的项目主类是这样的:
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, this.mTabHost
.newTabSpec("Tab2").setIndicator("Tab 2"),
(tabInfo = new TabInfo("Tab2", Tab2Fragment.class, args)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
TabsFragmentActivity.addTab(this, this.mTabHost, this.mTabHost
.newTabSpec("Tab3").setIndicator("Tab 3"),
(tabInfo = new TabInfo("Tab3", Tab3Fragment.class, args)));
this.mapTabInfo.put(tabInfo.tag, 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();
}
}
}
此创建3个标签与内容存在。这是怎么看待TAB1片段类(其他外观相似):
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;
}
}
我写的按钮按我想要的东西。
我无法在此片段内打开新的片段或活动?
我应该如何在碎片中进行导航?
这是使用回调的好例子。但是,如果我打电话给我的Fragment1 OnClickListiner,这有什么区别: ((TabsFragmentActivity)getActivity())。onButtonBClicked(); 这也可以调用onButtonBClicked()。但是如何处理每个标签的堆栈呢? – Streetboy 2012-04-18 05:38:13
它没有什么区别,除了它更清洁,我已经做了,因为你只需要投一次(如果你有多个调用的更强大的接口)。我为'onButtonClicked()'实现的实现将片段添加到后退堆栈,所以后退将显示前一个片段。 – 2012-04-18 15:27:37
好吧然后如何切换标签?我的意思是我把tab1放到深栈中,然后切换到tab2,然后进入深层,然后再切换到tab1,然后按回来按钮,我希望它会返回到tab1 – Streetboy 2012-04-19 06:10:26