同步任务不能将变量从doInBackground传递到onPostExecute更改的公共变量。在执行后
同步任务不能将变量从doInBackground传递到onPostExecute更改的公共变量。在执行后
提问于 2013-12-14 10:38:19
我有下面的代码来处理异步任务，我正在尝试更改一个名为result的外部变量
public class UP extends Fragment {
private String[] result = new String[3];
SumRequ connRes = new SumRequ();
connRes.execute();
final String bM = result[0];
final String bT = result[1];
final String hft = result[2];
final String hfy = result[3];
private class SuReq extends AsyncTask<String, String[], String[]> {
@Override
protected String[] doInBackground(String... params) {
String[] connResult;
final String neuSiparisUrlStr = getString(R.string.neu_siparis_url);
String wart = "";
String wort = "";
String week = "";
String mth = "";
try {
JSONTokener neuSipTokener = new JSONTokener(Sources.httpConnGet(neuSiparisUrlStr, getActivity()).toString());
JSONArray neuSipArray=new JSONArray(neuSipTokener);
for(int i=0; i<(neuSipArray.length()); i++)
{
JSONObject json_obj_neu_sip = neuSipArray.getJSONObject(i);
wart = json_obj_neu_sip.getString("mik");
wort = json_obj_neu_sip.getString("tur");
week = json_obj_neu_sip.getString("pt");
mth = json_obj_neu_sip.getString("pt2");
}
} catch (Exception e) {
}
connResult = new String[]{wart, wort, week, mth};
return connResult;
}
@Override
protected void onPostExecute(String[] connRes) {
super.onPostExecute(connRes);
result[0] = connRes[0];
result[1] = connRes[1];
result[2] = connRes[2];
result[3] = connRes[3];
}
}好的，事情是这样的。我的代码似乎一直在工作，直到return in doInBackground。当它试图将String[]传递给onPostExecute时，它就崩溃了。我跟踪调试，看到所有字符串都装满了我需要的信息。(瓦特、麦汁、周、米)我就是解决不了问题。
这也是我的日志：
12-14 10:27:42.865: E/AndroidRuntime(1773): FATAL EXCEPTION: main
12-14 10:27:42.865: E/AndroidRuntime(1773): java.lang.ArrayIndexOutOfBoundsException: length=3; index=3
12-14 10:27:42.865: E/AndroidRuntime(1773): at com.akilli.ticaret.upfragments.UPAnasayfa.onCreateView(UPAnasayfa.java:64)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:472)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.View.measure(View.java:15848)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.View.measure(View.java:15848)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
12-14 10:27:42.865: E/AndroidRuntime(1773): at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:302)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.View.measure(View.java:15848)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5012)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
12-14 10:27:42.865: E/AndroidRuntime(1773): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2189)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.View.measure(View.java:15848)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1905)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1104)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1284)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1004)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5481)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:749)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.Choreographer.doCallbacks(Choreographer.java:562)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.Choreographer.doFrame(Choreographer.java:532)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:735)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.os.Handler.handleCallback(Handler.java:730)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.os.Handler.dispatchMessage(Handler.java:92)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.os.Looper.loop(Looper.java:137)
12-14 10:27:42.865: E/AndroidRuntime(1773): at android.app.ActivityThread.main(ActivityThread.java:5103)
12-14 10:27:42.865: E/AndroidRuntime(1773): at java.lang.reflect.Method.invokeNative(Native Method)
12-14 10:27:42.865: E/AndroidRuntime(1773): at java.lang.reflect.Method.invoke(Method.java:525)
12-14 10:27:42.865: E/AndroidRuntime(1773): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
12-14 10:27:42.865: E/AndroidRuntime(1773): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
12-14 10:27:42.865: E/AndroidRuntime(1773): at dalvik.system.NativeStart.main(Native Method)回答 2
Stack Overflow用户
回答已采纳
发布于 2013-12-14 10:43:17
错误为neuSipArray.length());并从yeniSipArray.getJSONObject(i);中获取值
for(int i=0; i<(neuSipArray.length()); i++)
{
// error -> JSONObject json_obj_yeni_sip = yeniSipArray.getJSONObject(i);
replace to
-> JSONObject json_obj_yeni_sip = neuSipArray.getJSONObject(i);Stack Overflow用户
发布于 2013-12-14 11:00:56
好吧，这只是个愚蠢的错误，小心的人。String[] a= String3；并不意味着: a，a1，a2，a3 --它只是: a，a1和a2
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/20582225
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