我将如下图所示在Android 4.0中开发一个android应用。
我必须动态创建这些选项卡，然后动态调用addTab（）方法并动态创建选项卡栏。将ActionBarWithTab满足我的要求吗？将我引导至正确的方向。请提供教程。
编辑1：我需要在ActionBar中创建的单独的标签栏中加载Webview。
EIDT 2：为了使用TabHost创建选项卡栏，首先，我为TabHost创建了ViewGroup f并添加了选项卡栏项，如下面的代码。在选项卡栏项目中，我创建了布局，在布局内创建了一个webview，并将动态网址加载到了选项卡栏项中。最后，我将视图组设置为contentview（）;。
sTabHost = new TabHost(context,null);
sTabHost.setLayoutParams(
new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
TabWidget tabWidget = new TabWidget(context);
tabWidget.setId(android.R.id.tabs);
sTabHost.addView(tabWidget, new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT));
FrameLayout frameLayout = new FrameLayout(context);
frameLayout.setId(android.R.id.tabcontent);
final float scale = context.getResources().getDisplayMetrics().density;
int paddingtop = (int) (64 * scale + 0.5f);
frameLayout.setPadding(0, paddingtop, 0, 0);
sTabHost.addView(frameLayout, new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
sTabHost.setup();
然后，我添加了如下所示的选项卡项。
public void addTabItem(final String url, String tabTitle, Drawable tabIcon)
{
TabSpec ts1 = sTabHost.newTabSpec(tabTitle);
if(tabTitle.equals(""))
{
int childcount=sTabHost.getChildCount();
tabTitle="Tab" + String.valueOf(childcount+1);
}
if(tabIcon==null)
ts1.setIndicator(tabTitle);
else
ts1.setIndicator(tabTitle,tabIcon);
ts1.setContent(new TabHost.TabContentFactory(){
public View createTabContent(String tag)
{
LinearLayout panel = new LinearLayout(sActiveContext);
panel.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT));
panel.setOrientation(LinearLayout.VERTICAL);
FrameLayout layout=new FrameLayout();
// Here I am creating the webview loaded with the url within the layout and placed into the above FrameLayout.
panel.addView(layout);
return panel;
}
});
sTabHost.addTab(ts1);
sTabHost.setOnTabChangedListener(this);
}
现在，如何像添加的图像一样在操作栏中实现此目的？
我创建了带有以下代码标签的操作栏。
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final ActionBar actionBar = getActionBar();
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
Tab tabA = actionBar.newTab();
tabA.setText("Tab A");
tabA.setTabListener(new TabListener<MyFragmentA>(this, "Tag A", MyFragmentA.class));
actionBar.addTab(tabA);
}
TabListener类如下。
public static class TabListener<T extends Fragment>
implements ActionBar.TabListener{
private final Activity myActivity;
private final String myTag;
private final Class<T> myClass;
public TabListener(Activity activity, String tag, Class<T> cls) {
myActivity = activity;
myTag = tag;
myClass = cls;
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
Fragment myFragment = myActivity.getFragmentManager().findFragmentByTag(myTag);
// Check if the fragment is already initialized
if (myFragment == null) {
// If not, instantiate and add it to the activity
myFragment = Fragment.instantiate(myActivity, myClass.getName());
ft.add(android.R.id.content, myFragment, myTag);
} else {
// If it exists, simply attach it in order to show it
ft.show(myFragment);
}
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
Fragment myFragment = myActivity.getFragmentManager().findFragmentByTag(myTag);
if (myFragment != null) {
// Detach the fragment, because another one is being attached
ft.hide(myFragment);
}
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
// TODO Auto-generated method stub
}
}
Fragment类如下。
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View myFragmentView = inflater.inflate(R.layout.fragment_c, container, false);
WebView webview = (WebView) myFragmentView.findViewById(R.id.webview);
webview.setWebViewClient(new MyWebViewClient());
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setPluginsEnabled(true);
webview.getSettings().setBuiltInZoomControls(false);
webview.getSettings().setSupportZoom(false);
webview.getSettings().setJavaScriptCanOpenWindowsAutomatically(true);
webview.getSettings().setAllowFileAccess(true);
webview.getSettings().setDomStorageEnabled(true);
webview.loadUrl("http://jquerymobile.com/demos/1.2.1/");
return myFragmentView;
}
public class MyWebViewClient extends WebViewClient {
/* (non-Java doc)
* @see android.webkit.WebViewClient#shouldOverrideUrlLoading(android.webkit.WebView, java.lang.String)
*/
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
if (url.endsWith(".mp4"))
{
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.parse(url), "video/*");
view.getContext().startActivity(intent);
return true;
}
else {
return super.shouldOverrideUrlLoading(view, url);
}
}
}
在以上实现中，我创建了布局和单独的片段类。而不是像这样创建，如何在不创建xml布局和单独的片段类的情况下实现这一点。就像我为TabHost标签栏发布的代码一样。
编辑3：我已经创建了操作栏和选项卡项，如下面的代码。
public void addTabBar(Context context)
{
sActiveContext=context;
sActionBar = getActionBar();
sActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
}
public void addTabItem(final String url, String tabTitle)
{
Tab tab = sActionBar.newTab();
if(tabTitle.equals(""))
{
int childcount=sActionBar.getTabCount();
tabTitle="Tab" + String.valueOf(childcount+1);
}
tab.setText(tabTitle);
//Here I need to create the Layout with the webview and loaded into the created tab.
tab.setTabListener(this);
sActionBar.addTab(tab);
}
如何实现将具有给定URL的Webview加载到特定标签。
最佳答案
编辑答案3：-
尝试这个，
@SuppressLint("ValidFragment")
public class Sample extends FragmentActivity implements TabListener{
private ActionBar mActionBar=null;
private ArrayList<String> arrayList=null;
private LinearLayout linearLayout=null;
private WebView webView=null;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
linearLayout=new LinearLayout(this);
linearLayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
linearLayout.setOrientation(LinearLayout.VERTICAL);
setContentView(linearLayout);
mActionBar=getActionBar();
mActionBar.setDisplayShowHomeEnabled(true);
mActionBar.setDisplayShowTitleEnabled(false);
mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
webView=new WebView(this);
linearLayout.addView(webView);
arrayList=new ArrayList<String>();
addTab(0,"https://docs.google.com/viewer?url=http://121.242.120.82:8090/iSmartDM/DC/KIMS_Hospital_28/KIMS_hospital_Default_29" +
"/Physician_2_37/DOC/stamos-5644-00@gs138a-[01062006]-[160859]-[ds4000]-[].rtf");
addTab(1,"https://www.google.co.in");
addTab(2,"http://stackoverflow.com/questions/15964641/tab-bar-app-in-android-4-0/16009038?noredirect=1#comment22832140_16009038");
}
private void addTab(int position,String URL)
{
mActionBar.addTab(mActionBar.newTab().setTag("tab"+String.valueOf(position)).
setText("Tab "+String.valueOf(position)).setTabListener(this));
arrayList.add(URL);
}
@Override
public void onTabReselected(Tab tab, FragmentTransaction ft) {
}
@Override
public void onTabSelected(Tab tab, FragmentTransaction ft) {
webView.getSettings().setJavaScriptEnabled(true);
for (int i = 0; i < arrayList.size(); i++) {
if(tab.getPosition()==i)
{
webView.loadUrl(arrayList.get(i));
System.out.println(arrayList.get(i));
break;
}
}
}
@Override
public void onTabUnselected(Tab tab, FragmentTransaction ft) {
//if(webView!=null)
//linearLayout.removeView(webView);
}
}