は私が5つの活性を有する複数の活動

Question

から活動にエキストラを送信namely- D_EngNameScreen、D_LocNameScreen、D_GenCharScreen、D_PathSNameScreenとDisease_InformationScreen。ここでは最初の4つの活動が最後の活動へ意図とバンドル（Disease_InformationScreen）を介してエクストラを送っています。 コードは、私がこの場合D_EngNameScreen活動が正常Disease_InformationScreen活動にエキストラを送信しているが、残りは行っていない

if (getIntent().getExtras() != null) { 
       if (getIntent().getStringExtra("NAVIGATIONTYPE").contentEquals("EnglishName")) { 
      Bundle getcrop = getIntent().getExtras(); 
      cropname_en = getcrop.getString("CROPNAME_EN"); 
      Log.d("CNAME: ", cropname_en); 

      d_EngName = getcrop.getString("DENGNAME"); 
      Log.d("DENGNAME: ", d_EngName); 
      danme12.setText(d_EngName); 

     } else if (getIntent().getStringExtra("NAVIGATIONTYPE").contentEquals("LocalName")) { 
      Bundle getcrop = getIntent().getExtras(); 
      cropname_ln = getcrop.getString("CROPNAME_LN"); 
      Log.d("CNAME: ", cropname_ln); 
      d_LocName = getcrop.getString("DLOCALNAME"); 

     } else if (getIntent().getStringExtra("NAVIGATIONTYPE").contentEquals("PathogenName")) { 
      Bundle getcrop = getIntent().getExtras(); 
      cropname_pn = getcrop.getString("CROPNAME_PN"); 
      d_PathName = getcrop.getString("DPATHOSCINAME"); 

     } else if (getIntent().getStringExtra("NAVIGATIONTYPE").contentEquals("GeneralChar")) { 
      Bundle getcrop = getIntent().getExtras(); 
      cropname_gc = getcrop.getString("CROPNAME_GC"); 
      d_SprdMode = getcrop.getString("SPREADMODE"); 
      d_PathCE = getcrop.getString("PATHOGENCONENV"); 
     } 
    } 

アクティビティ - Disease_InformationScreenでエキストラを受け付けております

// from the D_EngNameScreen activity 

    Intent intentDENG = new Intent(D_EngNameScreen.this, Disease_InformationScreen.class); 
    d_eng_Name_Bundle.putString("CROPNAME_EN",crop_en); 
    d_eng_Name_Bundle.putString("DENGNAME",d_EngName); 
    intentDENG.putExtra("NAVIGATIONTYPE","EnglishName"); 
    intentDENG.putExtras(d_eng_Name_Bundle); 
    startActivity(intentDENG); 


//from the D_LocNameScreen activity 

    Intent intentDLN = new Intent(D_LocNameScreen.this, Disease_InformationScreen.class); 
    d_local_name_bundle.putString("CROPNAME_LN",crop_ln); 
    d_local_name_bundle.putString("DLOCALNAME",d_Locname); 
    intentDLN.putExtra("NAVIGATIONTYPE","LocalName"); 
    intentDLN.putExtras(d_local_name_bundle); 
    startActivity(intentDLN); 

//from the D_GenCharScreen activity 

Intent intentDGENCHAR = new Intent(D_GenCharScreen.this, Disease_InformationScreen.class); 
    d_gen_char_bundle.putString("CROPNAME_GC",crop_gc); 
    d_gen_char_bundle.putString("SPREADMODE",d_spread_Items); 
    d_gen_char_bundle.putString("PATHOGENCONENV",d_patho_environ_Items); 
    intentDGENCHAR.putExtra("NAVIGATIONTYPE","GeneralChar"); 
    intentDGENCHAR.putExtras(d_gen_char_bundle); 
    startActivity(intentDGENCHAR); 


//from the D_PathSNameScreen activity 

Intent intentDPSN = new Intent(D_PathSNameScreen.this,Disease_InformationScreen.class); 
     d_pathoName_bundle.putString("CROPNAME_PN",crop_pn); 
    d_pathoName_bundle.putString("DPATHOSCINAME",d_pathosci_name); 
    intentDPSN.putExtra("NAVIGATIONTYPE","PathogenName"); 
    intentDPSN.putExtras(d_pathoName_bundle); 
    startActivity(intentDPSN); 

をare-同じ。それはDisease_InformationScreenアクシビティにエクストラを送信している間に、残りの3つのアクティビティーでヌルポインター例外を表示しています -

d_local_name_bundle.putString("CROPNAME_LN",crop_ln);//for example 

Logcatだから、この問題で私を助けてください

05-20 11:40:27.365 15619-15619/com.thesiswork.ashraf.ashrafresearchwork E/AndroidRuntime: FATAL EXCEPTION: main 
                         java.lang.NullPointerException 
                          at com.thesiswork.ashraf.ashrafresearchwork.D_LocNameScreen.onClick(D_LocNameScreen.java:123) 
                          at android.view.View.performClick(View.java:4212) 
                          at android.view.View$PerformClick.run(View.java:17476) 
                          at android.os.Handler.handleCallback(Handler.java:800) 
                          at android.os.Handler.dispatchMessage(Handler.java:100) 
                          at android.os.Looper.loop(Looper.java:194) 
                          at android.app.ActivityThread.main(ActivityThread.java:5371) 
                          at java.lang.reflect.Method.invokeNative(Native Method) 
                          at java.lang.reflect.Method.invoke(Method.java:525) 
                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:833) 
                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:600) 
                          at dalvik.system.NativeStart.main(Native Method) 

をIS-

Answer 1

私はあなたが直面しているライン

d_local_name_bundle