我需要实现的是在每个选项卡中我想显示不同的网站,比如
Tab 1: http://www.stackoverflow.com
Tab 2: http://www.google..com
Tab 3. http://www.developers.android.com
我的问题是我无法访问 loadUrl() 的 WebView 对象
为了澄清我的问题,这是我的代码:
FragmentTabsPagerActivity.java
public class FragmentTabsPagerActivity extends FragmentActivity implements TabHost.OnTabChangeListener, ViewPager.OnPageChangeListener{
private TabHost mTabHost;
private ViewPager mViewPager;
private HashMap<String, TabInfo> mapTabInfo = new HashMap<String, FragmentTabsPagerActivity.TabInfo>();
private PagerAdapter mPagerAdapter;
...
private void initialiseTabHost(Bundle args) {
mTabHost = (TabHost)findViewById(android.R.id.tabhost);
mTabHost.setup();
TabInfo tabInfo = null;
Bundle bundle1 = new Bundle();
Bundle bundle2 = new Bundle();
Bundle bundle3 = new Bundle();
bundle1.putInt("id", 1);
bundle2.putInt("id", 2);
bundle3.putInt("id", 3);
FragmentTabsPagerActivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab1").setIndicator("Tab 1"), (tabInfo = new TabInfo("Tab1", TabsFragment.class, bundle1)));
FragmentTabsPagerActivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab2").setIndicator("Tab 2"), (tabInfo = new TabInfo("Tab2", TabsFragment.class, bundle2)));
FragmentTabsPagerActivity.addTab(this, this.mTabHost, this.mTabHost.newTabSpec("Tab3").setIndicator("Tab 3"), (tabInfo = new TabInfo("Tab3", TabsFragment.class, bundle3)));
this.mapTabInfo.put(tabInfo.tag, tabInfo);
mTabHost.setOnTabChangedListener(this);
}
}
TabsFragment.java
public class TabsFragment extends Fragment{
LinearLayout layout;
WebView mWebView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
layout = (LinearLayout)inflater.inflate(R.layout.fragments_layout, container, false);
mWebView = (WebView) layout.findViewById(R.id.webView1);
WebSettings setting =mWebView.getSettings();
mWebView.setWebViewClient(new WebViewClient(){
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return true;
}
});
if(container == null){
return null;
}
return layout;
}
public void setWebUrl(String url){
mWebView.loadUrl(url);
}
}
PagerAdapter.java
public class PagerAdapter extends FragmentPagerAdapter{
private List<Fragment> fragments;
public PagerAdapter(FragmentManager fm, List<Fragment> fragments) {
super(fm);
this.fragments = fragments;
}
@Override
public Fragment getItem(int position) {
return this.fragments.get(position);
}
@Override
public int getCount() {
return this.fragments.size();
}
}
编辑:
fragments_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/layout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
>
<WebView
android:id="@+id/webView1"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
最佳答案
我解决了这个问题。我使用下面的代码使我的标签动态化。
在我的 TabsFragment.java 中,我添加了一个 id 并通过 id = getArguments().getInt("id");
public class TabsFragment extends Fragment{
LinearLayout layout;
WebView mWebView;
int id;
public static TabsFragment newInstance(int id){
TabsFragment tab = new TabsFragment();
Bundle args = new Bundle();
args.putInt("id", id);
tab.setArguments(args);
return tab;
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
layout = (LinearLayout)inflater.inflate(R.layout.fragments_layout, container, false);
mWebView = (WebView) layout.findViewById(R.id.webView1);
WebSettings setting =mWebView.getSettings();
mWebView.setWebViewClient(new WebViewClient(){
public boolean shouldOverrideUrlLoading(WebView view, String url) {
return true;
}
});
if(container == null){
return null;
}
return layout;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onActivityCreated(savedInstanceState);
if(savedInstanceState != null){
id = savedInstanceState.getInt("id");
}else{
id = getArguments().getInt("id");
}
Log.w("id", id+"");
switch (id) {
case 1:
setWebUrl("http://www.stackoverflow.com");
break;
case 3:
setWebUrl("http://www.google..com");
break;
case 2:
setWebUrl("http://www.developers.android.com");
break;
default:
break;
}
}
public void setWebUrl(String url){
mWebView.loadUrl(url);
}
}
并且在 PagerAdapter.java *method getItem(int position)* 我创建了一个 TabsFragment 类的新实例并返回新实例.
@Override
public Fragment getItem(int position) {
TabsFragment tab = TabsFragment.newInstance(position+1);
//return this.fragments.get(position);
return tab;
}
它完美地工作。
关于android - 以编程方式设置 fragment 类中的 WebView loadUrl,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/10544602/