TextView.setText（）拋出空指針異常

-2

你好，很高興認識你們。我有一個令我困擾的問題連續兩天。讓我明白這一點。TextView.setText（）拋出空指針異常

我有2個活動，第一個填充靜態Hashtable和在第二個我想（第二活動的onCreate方法內側和的setContentView（）之後）

 TextView name=(TextView)findViewById(R.id.ForeignUserName);

，然後在在的onResume（）

name.setText("ASDFASD"); 
    Personal_Message.setText("sdfgsfgsf"); 
    Facebook.setText("adfads"); 
    Email.setText("adsfads"); 
    Mobile.setText("adsfadsf"); 
    AdditionalInformation.setText("sdfads");

（以下簡稱「asdfasd」字符串只是爲了調試我會Hashtable.get（I）後）

第一TextView的名字被填充，但其他Ø nes拋出空指針異常。我搜索了整個StackOverflow。我相信我錯過了很簡單的事情。任何幫助將非常感激。

謝謝！

XML

<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:tools="http://schemas.android.com/tools" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:id="@+id/ForeignProfileActivityLayout" 
    > 

    <ImageView 
     android:id="@+id/ForeignImageView01" 
     android:adjustViewBounds="true" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentLeft="true" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:contentDescription="@string/Profile_Image" 
     android:cropToPadding="true" 
     android:maxHeight="100dp" 
     android:maxWidth="100dp" 
     android:minHeight="100dp" 
     android:minWidth="100dp" 
     android:src="@drawable/person" /> 

    <TextView 
     android:id="@+id/ForeignPersonalMessage" 
     android:layout_width="wrap_content" 
     android:layout_height="30dp" 
     android:layout_below="@+id/ForeignUserName" 
     android:layout_alignParentRight="true" 
     android:ems="10" 
     android:hint="@string/Personal_Message" 
     /> 

    <TextView 
     android:id="@+id/ForeignUserEmail" 
     android:layout_width="wrap_content" 
     android:layout_height="30dp" 
     android:layout_below="@+id/ForeignFacebookPage" 
     android:ems="10" 
     android:hint="@string/email" 
     /> 


    <TextView 
     android:id="@+id/ForeignMobileNumber" 
     android:layout_width="wrap_content" 
     android:layout_height="30dp" 
     android:layout_below="@+id/ForeignUserEmail" 
     android:ems="10" 
     android:hint="@string/Your_mobile_phone_number" 
     /> 




    <TextView 
     android:id="@+id/ForeignUserInfo" 
     android:layout_width="fill_parent" 
     android:layout_height="30dp" 
     android:layout_below="@+id/ForeignMobileNumber" 
     android:ems="10" 
     android:height="100dp" 
     android:hint="@string/Additional_Information" 
     /> 

    <TextView 
     android:id="@+id/ForeignUserName" 
     android:layout_width="wrap_content" 
     android:layout_height="30dp" 
     android:layout_alignParentTop="true" 
     android:layout_alignParentRight="true" 
     android:ems="10" 
     android:hint="@string/Your_Name" /> 

    <TextView 
     android:id="@+id/ForeignFacebookPage" 
     android:layout_width="fill_parent" 
     android:layout_height="30dp" 
     android:layout_alignParentLeft="true" 
     android:layout_below="@+id/ForeignPersonalMessage" 
     android:layout_marginTop="86dp" 
     android:ems="10" 
     android:hint="@string/FBPage" /> 

</RelativeLayout>

ForeignProfile.java

public class ForeignProfile extends Activity { 
    TextView name,Facebook,Email,AdditionalInformation,Mobile,Personal_Message; 
    AdView adView; 
    static final String MYD_AD_UNIT_ID="-----------"; 

    static final String TAG="ForeignProfile"; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     BugSenseHandler.initAndStartSession(this, "-----"); 

     setContentView(R.layout.activity_foreign_profile); 
     Personal_Message=new TextView(getApplicationContext()); 

     adView=new AdView(this, AdSize.BANNER, MYD_AD_UNIT_ID); 
     RelativeLayout layout = (RelativeLayout)findViewById(R.id.ForeignProfileActivityLayout); 
     RelativeLayout.LayoutParams layoutParams=new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT); // check this out 
     layoutParams.addRule(RelativeLayout.ALIGN_BOTTOM, RelativeLayout.TRUE); 
     adView.setGravity(Gravity.BOTTOM); 
     layout.addView(adView,layoutParams); 
     AdRequest req=new AdRequest(); 
     req.addTestDevice("----------"); 
     adView.loadAd(req); 

     Log.d(TAG, "Foreign Profile Created"); 
     name=(TextView)findViewById(R.id.ForeignUserName); 
     Personal_Message=(TextView)findViewById(R.id.personalMessage); 
     Facebook=(TextView)findViewById(R.id.ForeignFacebookPage); 
     Email=(TextView)findViewById(R.id.ForeignUserEmail); 
     Mobile=(TextView)findViewById(R.id.ForeignMobileNumber); 
     AdditionalInformation=(TextView)findViewById(R.id.ForeignUserInfo); 



    } 
    @Override 
    public void onDestroy() { 
     adView.destroy(); 
     super.onDestroy(); 

     } 
    @Override 
    protected void onResume() { 
     name.setText("ASDFASD"); 
     Personal_Message.setText("sdfgsfgsf"); 
     Facebook.setText("adfads"); 
     Email.setText("adsfads"); 
     Mobile.setText("adsfadsf"); 
     AdditionalInformation.setText("sdfads"); 




     super.onResume(); 
    } 





}

來源

2013-12-13 George Daramouskas

這意味着TextView的初始化失敗給NPE – Raghunandan

發表您的XML wher你有textviews並在您初始化textviews – Raghunandan

如姓名TextView的代碼你通過findViewById引用你的其他的TextView的（Personal_Message，臉譜，...）？ – saiful103a

你有以下的XML

<TextView 
     android:id="@+id/ForeignPersonalMessage" // id is ForeignPersonalMessage

更改以下

Personal_Message=(TextView)findViewById(R.id.personalMessage);

到

Personal_Message=(TextView)findViewById(R.id.ForeignPersonalMessage);

來源

2013-12-13 16:24:45 Raghunandan

就是這樣。謝謝Raghunandan！我不能相信我錯過了這個！再次感謝！ –

我相信你需要：

TextView facebook=(TextView)findViewById(R.id.ForeignFacebookPage); 
facebook.setText("adfads");

對於Facebook，電子郵件，移動和AdditionalInformation。

來源

2013-12-13 16:28:57 lindenrovio

沒有它的初始化正確，因爲我可以在發佈 – Raghunandan

@Raghunandan的問題中看到，是的。 – lindenrovio

TextView.setText（）拋出空指針異常

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