光標光標= managedQuery（intent.getData（）.... NullPointerException異常

Question

我有錯誤代碼

public void runIntent() 
    { 
     Intent intent = new  Intent(Intent.ACTION_PICK,ContactsContract.Contacts.CONTENT_URI); 
     startActivityForResult(intent, 1); 

    } 
    public void onActivityResult(int requestCode, int resultCode, Intent intent) 
    { 

       if (resultCode == 0) { 
       getContactInfo(intent); 
       Log.e("RESULT_OK","Ok"); 
       }else 
       { 
        Log.e("RESULT_OK","Error"); 
       } 
    }//onActivityResult 

和getContactInfo（意向）

public void getContactInfo(Intent intent) 
    { 
     Cursor cursor = managedQuery(intent.getData(), null, null, null, null); //i think error here becouse when i delete this i not have error. 
cursor.close(); 
    } 

我不知道，但在這。funiction線光標=管理查詢...我有NullPointerException異常（（（我不知道如何解決它

這裏從logcat中：

04-05 10:48:53.055: ERROR/AndroidRuntime(620): FATAL EXCEPTION: main 
04-05 10:48:53.055: ERROR/AndroidRuntime(620): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=0, data=null} to activity {contactTest.com/contactTest.com.ContactTest}: java.lang.NullPointerException 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.app.ActivityThread.deliverResults(ActivityThread.java:3515) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.app.ActivityThread.handleSendResult(ActivityThread.java:3557) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.app.ActivityThread.access$2800(ActivityThread.java:125) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2063) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.os.Handler.dispatchMessage(Handler.java:99) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.os.Looper.loop(Looper.java:123) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.app.ActivityThread.main(ActivityThread.java:4627) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at java.lang.reflect.Method.invokeNative(Native Method) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at java.lang.reflect.Method.invoke(Method.java:521) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at dalvik.system.NativeStart.main(Native Method) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620): Caused by: java.lang.NullPointerException 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at contactTest.com.ContactTest.getContactInfo(ContactTest.java:71) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at contactTest.com.ContactTest.onActivityResult(ContactTest.java:61) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.app.Activity.dispatchActivityResult(Activity.java:3890) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  at android.app.ActivityThread.deliverResults(ActivityThread.java:3511) 
04-05 10:48:53.055: ERROR/AndroidRuntime(620):  ... 11 more 
04-05 10:48:53.085: WARN/ActivityManager(60): Force finishing activity contactTest.com/.ContactTest 

當意圖開始 - 我按Backbackton（在手機上），我在logcat中的錯誤，應用程序停止。請告訴我如何解決它，我看到很多帖子對這個論壇 - 但無法找到任何東西可以幫助我:( 的問候，彼得

Answer 1

嘗試this..it會爲你

public void runIntent() 
{ 
    Intent intent = new 
Intent(Intent.ACTION_PICK,ContactsContract.Contacts.CONTENT_URI); 
    startActivityForResult(intent, 1); 

} 
public void onActivityResult(int requestCode, int resultCode, Intent intent) 
{ 

      if (resultCode == RESULT_OK) { 
      getContactInfo(intent); 
      Log.e("RESULT_OK","Ok"); 
      }else 
      { 
       Log.e("RESULT_OK","Error"); 
      } 
} 

工作。