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我有一个应用程序,它使用aSync任务来挖掘一些HTML数据,它工作正常,直到我尝试在我的应用程序上使用TabHost。事情是,当我尝试打开这个选项卡时,它弹出ProgressDialog,但一会儿它进入doInBackground
方法内部的catch,并且Exception是null,而不是NullPoint,只是e=null
,并且没有将适配器设置为来自采矿的数据。下面是一些代码:问题与TabHost和异步任务
onCreate(){
...
this.pd = ProgressDialog.show(this, "Downloading..",
"Downloading...", true, false);
this.pd.setCanceledOnTouchOutside(false);
this.pd.setCancelable(true);
...
task = new DownloadTask().execute("Starting");
}
而且
private class DownloadTask extends AsyncTask<String, Void, Object> {
protected Object doInBackground(String... args) {
search = new Search(person);
try {
search.Login();
data = search.ParseData();
} catch (Exception e) {
erroUnknown = true;
}
adapter = new RowAdapter(DataActivity.this, data);
}
}
而且tabActivity:
public class TabMenu extends TabActivity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.menu);
Resources res = getResources(); // Resource object to get Drawables
TabHost tabHost = getTabHost(); // The activity TabHost
TabHost.TabSpec spec; // Resusable TabSpec for each tab
Intent intent; // Reusable Intent for each tab
// Create an Intent to launch an Activity for the tab (to be reused)
intent = new Intent().setClass(this, DataActivity.class);
// Initialize a TabSpec for each tab and add it to the TabHost
spec = tabHost
.newTabSpec("data")
.setIndicator("Data",
res.getDrawable(R.drawable.ic_launcher))
.setContent(intent);
tabHost.addTab(spec);
//Just test
spec = tabHost
.newTabSpec("artists")
.setIndicator("Artists",
res.getDrawable(R.drawable.ic_launcher))
.setContent(intent);
tabHost.addTab(spec);
tabHost.setCurrentTab(0);
}
}
任何想法,为什么它进入catch块?使用tabActivity时是否需要修改一些代码?
在此先感谢
更新: 虽然有时调试,我得到了E = IllegalStateException异常从entity.getContent(),即使是第一次被调用。和StringOutOfBoundsException,因为内容没有获取正确的数据,我的意思是,没有它登录的标签,并且工作页面,但是对于tabHost它没有,它是如何受到tabHost影响的?