Android WebView CanGoBack在TabHost中不工作
我使用以下链接创建了动态Tabhost 我用WebView更改了内容,如下所示Android WebView CanGoBack在TabHost中不工作,android,android-webview,android-tabhost,Android,Android Webview,Android Tabhost,我使用以下链接创建了动态Tabhost 我用WebView更改了内容,如下所示 ts3.setContent(new TabHost.TabContentFactory(){ public View createTabContent(String tag) { LinearLayout panel = new LinearLayout(sActiveContext); panel
ts3.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);
WebView webview=new WebView(sActiveContext);
panel.addView(webview);
return panel;
}
});
webview.goback()的实现如下
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if(event.getAction() == KeyEvent.ACTION_DOWN)
{
switch(keyCode)
{
case KeyEvent.KEYCODE_BACK:
if(webview.canGoBack())
webview.goBack();
else
//alert
return true;
}
}
return super.onKeyDown(keyCode, event);
}
我总是只收到警报消息
。我错过了什么
注意:从客户端传递的选项卡和标题的数量。上面的代码在服务器端。我已经用WebView解决了这个goback问题。我已从tabhost的当前选项卡中获取当前webview。现在一切正常
public static WebView getCurrentWebView()
{
if(sTabHost!=null)
{
View view=sTabHost.getCurrentView();
if(view!=null)
{
View child=((ViewGroup)view).getChildAt(0);
for(int i=0; i<((ViewGroup)child).getChildCount(); i++) {
View nextChild = ((ViewGroup)child).getChildAt(i);
if(nextChild!=null)
{
String type=nextChild.getClass().toString();
if(type!=null && !type.equals("") && type.equals("class android.webkit.WebView"))
{
sCurrentWebView=(WebView) (((ViewGroup)child).getChildAt(i));
break;
}
}
}
}
}
return sCurrentWebView;
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event)
{
if(event.getAction() == KeyEvent.ACTION_DOWN)
{
switch(keyCode)
{
case KeyEvent.KEYCODE_BACK:
WebView view=getCurrentWebView();
if(view!=null && view.canGoBack())
view.goBack();
else
//alert
return true;
}
}
return super.onKeyDown(keyCode, event);
}
publicstaticwebview getCurrentWebView()
{
if(sTabHost!=null)
{
View=sTabHost.getCurrentView();
如果(视图!=null)
{
视图子对象=((视图组)视图).getChildAt(0);
对于(int i=0;i