I am getting a NullPointerException error in my code, I have narrowed it down to be this piece of code that is causing the exception. Can anyone help?
url = new URL(Http.toString());
Iterator is a raw type. References to generic type Iterator<E> should be parameterized User_menu.java /RSBUYclient/src/com/example/rsbuyclient line 141 Java Problem
04-24 11:34:29.756: W/System.err(32259): java.lang.NullPointerException
And I have second problem is: When I click in this button I get the following exception: "android.view.ViewRootImpl$CalledFromWrongThreadException: Only the original thread that created a view hierarchy can touch its views." How can I solve? thanks .
private OnClickListener btsearchitemListener = new OnClickListener()
{
public void onClick(View v)
{
// TODO Auto-generated method stub
final Handler handler = new Handler();
handler.post(new Runnable() {
//User_menu.this.runOnUiThread(new Runnable() {
//User_menu.this.runOnUiThread(new Runnable(){
public void run() {
// TODO Auto-generated method stub
editText1.setHint("");
//URL url ;
//String Http_keyWord = "http://tw.search.bid.yahoo.com/search/auction/product?p=%s", Http, Keyword;
//String Http_keyWord = "https://tw.search.yahoo.com/search?p=u+zj6&fr=yfp&ei=utf-8&v=0", Http, Keyword;
AllDatainfos = new ArrayList<HashMap<String, Object>>();
Keyword = editText1.getText().toString().trim();
tvspottempp = (TextView)findViewById(R.id.tvspottempp);
tvspottempp.setText("Keyword:"+Keyword);
Http = String.format(Http_keyWord, UTF8EnCode(Keyword));
tvspottempp1 = (TextView)findViewById(R.id.tvspottempp1);
tvspottempp1.setText("Http:"+Http);
}
});
User_menu.this.runOnUiThread(new Runnable(){
public void run() {
try {
url = new URL(Http.toString());
tvspottempp2 = (TextView)findViewById(R.id.tvspottempp2);
tvspottempp2.setText("url:"+url);
Document doc;
doc = Jsoup.parse(url, 3000);
tvspottempp2 = (TextView)findViewById(R.id.tvspottempp3);
tvspottempp2.setText("doc:"+doc);
Elements paramDocuments = doc.select("#srp_result_list, #srp_gaze_list").select(".grid-type.yui3-g > *");
Iterator localIterator = paramDocuments.select("#srp_result_list, #srp_gaze_list").select(".grid-type.yui3-g > *").iterator();
while (true)
{
if (!localIterator.hasNext())
return;
Element localElement1 = (Element)localIterator.next();
try
{
SearchResultItem localSearchResultItem = new SearchResultItem();
Element localElement2 = localElement1.select(".wrap").first();
parsePhoto(localSearchResultItem, localElement2);
parsePrice(localSearchResultItem, localElement2);
parseTitle(localSearchResultItem, localElement2);
}
catch (Exception localException2)
{
localException2.printStackTrace();
}
}
}catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (Exception localException1)
{
localException1.printStackTrace();
} try {
Thread.sleep(5000) ;
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
});
}
};
04-24 12:25:31.231: W/System.err(9995): java.lang.NullPointerException
04-24 12:25:31.236: W/System.err(9995): at com.example.rsbuyclient.User_menu$1$2.run(User_menu.java:138)
04-24 12:25:31.236: W/System.err(9995): at android.app.Activity.runOnUiThread(Activity.java:4893)
04-24 12:25:31.236: W/System.err(9995): at com.example.rsbuyclient.User_menu$1.onClick(User_menu.java:135)
04-24 12:25:31.236: W/System.err(9995): at android.view.View.performClick(View.java:4475)
04-24 12:25:31.236: W/System.err(9995): at android.view.View$PerformClick.run(View.java:18786)
04-24 12:25:31.236: W/System.err(9995): at android.os.Handler.handleCallback(Handler.java:730)
04-24 12:25:31.236: W/System.err(9995): at android.os.Handler.dispatchMessage(Handler.java:92)
04-24 12:25:31.236: W/System.err(9995): at android.os.Looper.loop(Looper.java:137)
04-24 12:25:31.236: W/System.err(9995): at android.app.ActivityThread.main(ActivityThread.java:5419)
04-24 12:25:31.236: W/System.err(9995): at java.lang.reflect.Method.invokeNative(Native Method)
04-24 12:25:31.236: W/System.err(9995): at java.lang.reflect.Method.invoke(Method.java:525)
04-24 12:25:31.236: W/System.err(9995): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1187)
04-24 12:25:31.236: W/System.err(9995): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)
04-24 12:25:31.236: W/System.err(9995): at dalvik.system.NativeStart.main(Native Method)
04-24 12:25:36.256: W/Choreographer(9995): Already have a pending vsync event. There should only be one at a time.
You are updating UI (TextView settext) on thread thats why your getting error.
// ui stuff updating that's why showing error
tvspottempp2 = (TextView)findViewById(R.id.tvspottempp2);
tvspottempp2.setText("url:"+url);
Android "Only the original thread that created a view hierarchy can touch its views."