Question

我正在尝试使用onClick事件按钮运行的AsyncTask有些麻烦。我让它在“HomePageActivity”中工作，但随后将代码转移到一个新活动中，现在应用程序在单击按钮时崩溃。它曾经完美地运作。

任何人都可以帮我解决这个问题吗？我确信一双新眼睛可以发现它很简单。

public class GamesOverview extends HomePageActivity {

public final static String BaseUrl="http://URL.com/"; 
 ArrayList<DEPT_HOLD> deptList=new ArrayList<DEPT_HOLD>();

private class GetDeptAyncTask extends AsyncTask<Hashtable<String,String>,Void,String>{  
 // Parse in background
 @Override
 protected String doInBackground(Hashtable<String,String>... params) {
  @SuppressWarnings("rawtypes")
  Hashtable ht=params[0];
  @SuppressWarnings("unchecked")
  String json=HelperHttp.getJSONResponseFromURL(BaseUrl+"JSONURLGOESHERE", ht);
   if(json!=null) parseJsonString(deptList,json);
   else {
    return "Invalid Company Id";
   }
    return "SUCCESS";
 }
 // Parse JSON
 protected void parseJsonString(ArrayList<DEPT_HOLD> deptList,String json) {
  try {
   JSONObject top = new JSONObject(json);
   JSONObject topAdds = (JSONObject) top.get("topAdds");
   JSONArray array = (JSONArray) topAdds.get("player");
    for(int i = 0; i < array.length(); i++) {
     JSONObject j = array.getJSONObject(i);
     DEPT_HOLD d = new DEPT_HOLD();
      d.one = j.optString("percent","");
      d.two = j.optString("id","");
       deptList.add(d);
    }
  } catch (JSONException e) {
   e.printStackTrace();
  }
 } 
 // Execute post
 @Override
 protected void onPostExecute(String result) {
  if(result=="SUCCESS") {
   Toast.makeText(GamesOverview.this, "Success"+deptList, Toast.LENGTH_SHORT).show();
   DeptArrayAdapter adapter=new DeptArrayAdapter(GamesOverview.this,R.id.text1,deptList);
   ListView listv=(ListView)findViewById(R.id.lv);
   listv.setAdapter(adapter);
  }
  else{}
 }    
}

public void onCreate(Bundle savedInstanceState) {
 super.onCreate(savedInstanceState);

  // Scrolling
  ScrollView scroll;
  scroll = new ScrollView(this);
   HorizontalScrollView horizontalscroll;
   horizontalscroll = new HorizontalScrollView(this);
  // End

    // Get JSON button
    final Button JSONButton = new Button(this);
     JSONButton.setText("Get JSON");
     JSONButton.setTextSize(20);
     JSONButton.setTextColor(Color.rgb(000,000,000));
      JSONButton.setOnClickListener(new View.OnClickListener() {
       @Override
       public void onClick(View v) {
        executeAsyncTask();
       }
      });
    // End

    // LAYOUT
    LinearLayout layout = new LinearLayout(this);
     layout.setOrientation(LinearLayout.VERTICAL);
     layout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
     LinearLayout.LayoutParams layoutparams = new LinearLayout.LayoutParams(getWindowManager().getDefaultDisplay().getWidth(),getWindowManager().getDefaultDisplay().getHeight());
      layout.setGravity(Gravity.CENTER_HORIZONTAL);
       layout.setBackgroundResource(R.drawable.body_bg);
        // DisplayJSONButton
        LinearLayout displayJSONButtonlayout = new LinearLayout(this);
         displayJSONButtonlayout.setOrientation(LinearLayout.HORIZONTAL);
         displayJSONButtonlayout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT));
         LinearLayout.LayoutParams displayJSONButtonlayout_params = new LinearLayout.LayoutParams(getWindowManager().getDefaultDisplay().getWidth()-50,100);
          displayJSONButtonlayout_params.setMargins(0,10,0,0);
          displayJSONButtonlayout.setGravity(Gravity.CENTER_HORIZONTAL);
           displayJSONButtonlayout.addView(JSONButton,displayJSONButtonlayout_params);
    // END LAYOUT       

     layout.addView(displayJSONButtonlayout);
      layout.requestLayout();

      // Enable scrolling
      scroll.addView(layout,layoutparams);
      horizontalscroll.addView(scroll);

       // Set content view
       setContentView(horizontalscroll);

}

// Finish up task
@SuppressWarnings("unchecked")
private void executeAsyncTask(){
 Hashtable<String,String> ht=new Hashtable<String,String>();
 GetDeptAyncTask async=new GetDeptAyncTask();
  ht.put("", "");
   @SuppressWarnings("rawtypes")
   Hashtable[] ht_array={ht};
    async.execute(ht_array);
}

}

我能找到的所有logcat信息：

?:??: W/?(?): URL==>http://football.myfantasyleague.com/2007/export?TYPE=topAdds&W=12&JSON=1?=
?:??: W/?(?): Forward DNS query to netd(h=football.myfantasyleague.com s=^)
?:??: W/?(?):   at myfantasyleague.app.GamesOverview$GetDeptAyncTask.onPostExecute(GamesOverview.java:73)
?:??: W/?(?):   at myfantasyleague.app.GamesOverview$GetDeptAyncTask.onPostExecute(GamesOverview.java:1)
?:??: W/?(?):   Force finishing activity myfantasyleague.app/.GamesOverview
?:??: W/?(?): read: 04-02 14:42:47.990   464   474 W ActivityManager:   Force finishing activity myfantasyleague.app/.GamesOverview
?:??: W/?(?): app: myfantasyleague.app
?:??: W/?(?): Activity pause timeout for ActivityRecord{41881918 myfantasyleague.app/.GamesOverview}
?:??: W/?(?): read: 04-02 14:42:48.521   464   477 W ActivityManager: Activity pause timeout for ActivityRecord{41881918 myfantasyleague.app/.GamesOverview}
?:??: W/?(?): ACTION_PACKAGE_REMOVED: myfantasyleague.app
?:??: W/?(?):   dummy: {}]
?:??: W/?(?): 卸载了:myfantasyleague.app
?:??: W/?(?): myfantasyleague.app
?:??: W/?(?): PackageMonitor: doOnReceive(): android.intent.action.PACKAGE_REMOVED [myfantasyleague.app] REPLACING:true
?:??: W/?(?):   dummy: {}]
?:??: W/?(?): PackageMonitor: doOnReceive(): android.intent.action.PACKAGE_REMOVED [myfantasyleague.app] REPLACING:true
?:??: W/?(?): PackageMonitor: doOnReceive(): android.intent.action.PACKAGE_ADDED [myfantasyleague.app] REPLACING:true
?:??: W/?(?): Activity idle timeout for ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}
?:??: W/?(?): PackageMonitor: doOnReceive(): android.intent.action.PACKAGE_ADDED [myfantasyleague.app] REPLACING:true
?:??: W/?(?): read: 04-02 14:42:58.560   464   477 W ActivityManager: Activity idle timeout for ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}
?:??: W/?(?):   dummy: {}]
?:??: W/?(?): Activity pause timeout for ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}
?:??: W/?(?): read: 04-02 14:43:48.631   464   477 W ActivityManager: Activity pause timeout for ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}
?:??: W/?(?):   dummy: {}]
?:??: W/?(?): Activity destroy timeout for ActivityRecord{41881918 myfantasyleague.app/.GamesOverview}
?:??: W/?(?): Activity stop timeout for ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}
?:??: W/?(?): read: 04-02 14:43:58.857   464   477 W ActivityManager: Activity destroy timeout for ActivityRecord{41881918 myfantasyleague.app/.GamesOverview}
?:??: W/?(?): read: 04-02 14:43:58.857   464   477 W ActivityManager: Activity stop timeout for ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}
?:??: W/?(?): This window was lost: Window{425b0c78 myfantasyleague.app/myfantasyleague.app.GamesOverview paused=false}
?:??: W/?(?): mToken=AppWindowToken{424bb208 token=Token{425d1e10 ActivityRecord{41881918 myfantasyleague.app/.GamesOverview}}}
?:??: W/?(?): mRootToken=AppWindowToken{424bb208 token=Token{425d1e10 ActivityRecord{41881918 myfantasyleague.app/.GamesOverview}}}
?:??: W/?(?): mAppToken=AppWindowToken{424bb208 token=Token{425d1e10 ActivityRecord{41881918 myfantasyleague.app/.GamesOverview}}}
?:??: W/?(?): mSurface=Surface(name=myfantasyleague.app/myfantasyleague.app.GamesOverview, identity=7073)
?:??: W/?(?):   #16: Token{421d65e8 ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}}
?:??: W/?(?):   #4: Window{42513558 myfantasyleague.app/myfantasyleague.app.MyFantasyLeagueActivity paused=false}
?:??: W/?(?):   dummy: {}]
?:??: W/?(?):   dummy: {}]
?:??: W/?(?):   dummy: {}]
?:??: W/?(?): Activity idle timeout for ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}
?:??: W/?(?): read: 04-02 14:44:09.037   464   477 W ActivityManager: Activity idle timeout for ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}
?:??: W/?(?): WIN DEATH: Window{42513558 myfantasyleague.app/myfantasyleague.app.MyFantasyLeagueActivity paused=false}
?:??: W/?(?): Process myfantasyleague.app (pid 14733) has died.
?:??: W/?(?): read: 04-02 14:44:40.935   464   866 I ActivityManager: Process myfantasyleague.app (pid 14733) has died.
?:??: W/?(?): Force removing ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}: app died, no saved state
?:??: W/?(?): WIN DEATH: Window{425b0c78 myfantasyleague.app/myfantasyleague.app.GamesOverview paused=false}
?:??: W/?(?): read: 04-02 14:44:40.935   464   866 W ActivityManager: Force removing ActivityRecord{4184f330 myfantasyleague.app/.MyFantasyLeagueActivity}: app died, no saved state
?:??: W/?(?):   dummy: {}]

Answer 1

根据你的logcat它的完美直到onpostexecute（），我想你正等着从下面的网址得到一些结果这导致延迟和完成你的活动。

http://football.myfantasyleague.com/2007/export?TYPE=topAdds&W=12&JSON=1?=

Answer 2

我解决了这个问题。该应用程序崩溃是因为我编写了使用main.xml布局显示的代码，但一直试图使用第二个接口来控制main.xml接口。这导致帮助活动的并发症。

感谢所有试图帮助我解决这个问题的人。

onClick在执行AsyncTask时崩溃应用程序

2 个答案: