不幸的是，應用程序已經停止在登錄

我試圖讓伐木的Android應用程序，但是當我運行它，它告訴我的應用程序已經停止，這裏是我的登錄活動：不幸的是，應用程序已經停止在登錄

public class Connexion extends Activity { 
    Button b; 
    EditText PWDEDIT; 
    EditText LOGINEDIT; 
    String loginedit; 
    String pwdedit; 
    Context CTX = this; 
    Toast toast = Toast.makeText(this, "login ou mot de passe incorrect", Toast.LENGTH_LONG); 


    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_connexion); 
     b = (Button) findViewById(connexion); 
     PWDEDIT = (EditText) findViewById(passwordeditText); 
     LOGINEDIT = (EditText) findViewById(logineditText); 




     b.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View v) { 
       Toast t = Toast.makeText(getBaseContext(), "Please wait", Toast.LENGTH_LONG); 
       loginedit = LOGINEDIT.getText().toString(); 
       pwdedit = PWDEDIT.getText().toString(); 
       DataBaseOperationstwo DOP = new DataBaseOperationstwo(CTX); 
       Cursor CR = DOP.getloginuser(DOP); 
       CR.moveToFirst(); 
       boolean loginstatus = false; 
       String NAME = ""; 
       do { 
        if (loginedit.equals(CR.getString(0)) && (pwdedit.equals(CR.getString(1)))) { 
         loginstatus = true; 
         NAME = CR.getString(0); 
        } 
       } while (CR.moveToNext()); 
       if (loginstatus) { 
        Toast.makeText(getBaseContext(), "authentification réussie \n Bienvenue" + NAME, Toast.LENGTH_LONG).show(); 


        finish(); 
       } else { 

        Toast.makeText(getBaseContext(), "login failed", Toast.LENGTH_LONG).show(); 

        finish(); 


       } 


      } 
     }); 


    } 
}

，這裏是我的sqliteopenhelper類：

public class DataBaseOperationstwo extends SQLiteOpenHelper { 
public static final int database_version = 10; 
public String CREATE_QUERY = "CREATE TABLE " + TableData.TableInfo.TABLE_NAME +" ("+ TableData.TableInfo.USER_NAME+" TEXT,"+ TableData.TableInfo.USER_PASS+" TEXT);"; 
//clé etranger avec utilisateur 
    //                                                       + TASK_CAT + " integer," + " FOREIGN KEY ("+TASK_CAT+") REFERENCES "+CAT_TABLE+" ("+CAT_ID+"));"; 
//foreign key doone !! 
private static final String CREATE_NOTE = "CREATE TABLE " + TableData.TableInfo.TABLE_NOTE_NAME +" (" + 
TableData.TableInfo.UID_NOTE+" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.TITRE+" VARCHAR (255),"+ TableData.TableInfo.OBJET+" VARCHAR (255),"+ TableData.TableInfo.PRAM_N+" VARCHAR (255)," + TableData.TableInfo.EIDUSER+ " integer," + " FOREIGN KEY ("+TableData.TableInfo.EIDUSER+") REFERENCES "+TableData.TableInfo.TABLE_USER+" ("+TableData.TableInfo.UID_USER+"));"; 
//foreign key done!! 
private static final String CREATE_ARCHIVE = "CREATE TABLE " + TableData.TableInfo.TABLE_ARCHIVE_NAME+" (" + TableData.TableInfo.UID_ARCHIVE+" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.ARCHIVE_NOTEID+ " integer," + " FOREIGN KEY ("+TableData.TableInfo.ARCHIVE_NOTEID+") REFERENCES "+TableData.TableInfo.TABLE_NOTE_NAME+" ("+TableData.TableInfo.UID_NOTE+"));"; 
//cv no FK 
private static final String CREATE_USER = "CREATE TABLE " + TableData.TableInfo.TABLE_USER +" (" + 
TableData.TableInfo.UID_USER+" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.NOM+" VARCHAR (255),"+ TableData.TableInfo.PRENOM+" VARCHAR (255),"+ TableData.TableInfo.DATE_NAISS+" DATE,"+ TableData.TableInfo.E_MAIL+ 
" VARCHAR (255),"+ TableData.TableInfo.LOGIN+" VARCHAR (255),"+ TableData.TableInfo.MOT_PASSE+" VARCHAR (255),"+ TableData.TableInfo.GENRE+" VARCHAR (255));"; 
//cv FK dooooone!! 
private static final String CREATE_INSCRIPTION = "CREATE TABLE " + TableData.TableInfo.TABLE_INSCRIPTION_NAME+" (" + TableData.TableInfo.UID_USERI+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.NOMI+" VARCHAR (255),"+ TableData.TableInfo.PRENOMI+"VARCHAR (255),"+ TableData.TableInfo.DATE_NAISSI+ 
"DATE,"+ TableData.TableInfo.E_MAILI+"VARCHAR (255),"+ TableData.TableInfo.LOGINI+" VARCHAR (255),"+ TableData.TableInfo.MOT_PASSEI+" VARCHAR (255),"+ TableData.TableInfo.INC_IDUSER+ " integer," + " FOREIGN KEY ("+TableData.TableInfo.INC_IDUSER+") REFERENCES "+TableData.TableInfo.TABLE_USER+" ("+TableData.TableInfo.UID_USER+"));"; 
//FK DOONE 
    private static final String CREATE_AUTHENTIFICATION = "CREATE TABLE " + TableData.TableInfo.TABLE_AUTHENTIFICATION_NAME+" (" + TableData.TableInfo.LOGINA+" VARCHAR (255),"+ TableData.TableInfo.MOT_PASSEA+" VARCHAR (255),"+ TableData.TableInfo.AIDUSER+ " integer," + " FOREIGN KEY ("+TableData.TableInfo.AIDUSER+") REFERENCES "+TableData.TableInfo.TABLE_USER+" ("+TableData.TableInfo.UID_USER+"));"; 
    //cv no FK 
private static final String CREATE_MESSAGE= "CREATE TABLE " + TableData.TableInfo.TABLE_MESSAGE_NAME+" (" + TableData.TableInfo.UID_MESSAGE+ 
" INTEGER PRIMARY KEY AUTOINCREMENT," + TableData.TableInfo.TEXTE_MESSAGE +" VARCHAR(255));"; 
    //cv no FK 
private static final String CREATE_MESSAGE_FORUM = "CREATE TABLE " + TableData.TableInfo.TABLE_MESSAGE_NAME+" (" + TableData.TableInfo.UID_MESSAGE+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.SUJET_MESSAGE +" VARCHAR(255)," + TableData.TableInfo.TEXTE_MESSAGE+" VARCHAR(255));"; 
    //FK CV 
private static final String CREATE_FORUM = "CREATE TABLE " + TableData.TableInfo.TABLE_FORUM_NAME+" (" + TableData.TableInfo.UID_FORUM+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.UID_NOTEF+ " integer," + " FOREIGN KEY ("+TableData.TableInfo.UID_NOTEF+") REFERENCES "+TableData.TableInfo.TABLE_NOTE_NAME+" ("+TableData.TableInfo.UID_NOTE+"));"; 
// clé etran\\CV 
private static final String CREATE_NOTIFICATION = "CREATE TABLE " + TableData.TableInfo.TABLE_NOTIFICATION_NAME+" (" + TableData.TableInfo.UID_USERN+ 
" INTEGER, " + TableData.TableInfo.UID_NOTEN + TableData.TableInfo.UID_MESSAGE+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.TEXTE_MESSAGE +" VARCHAR(255)," + TableData.TableInfo.OBJET_NOTIFICATION+ " VARCHAR(255))"+TableData.TableInfo.NIDUSER+ " integer," + " FOREIGN KEY ("+TableData.TableInfo.NIDUSER+") REFERENCES "+TableData.TableInfo.TABLE_USER+" ("+TableData.TableInfo.UID_USER+"));"; 
//insertion mrigel!! 
private static final String CREATE_INSERTION = "CREATE TABLE " + TableData.TableInfo.TABLE_INSERTION_NAME+" (" + TableData.TableInfo.UID_INSERTION+" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.PATH_INSERTION +" VARCHAR(255)," + TableData.TableInfo.TAILLE_INSERTION+ " VARCHAR(255)"+ TableData.TableInfo.UID_NOTEINSERT+ " integer," + " FOREIGN KEY ("+TableData.TableInfo.UID_NOTEINSERT+") REFERENCES "+TableData.TableInfo.TABLE_NOTE_NAME+" ("+TableData.TableInfo.UID_NOTE+"));"; 

private static final String CREATE_ATEMPORAIRE = "CREATE TABLE " + TableData.TableInfo.TABLE_ATEMPORAIRE_NAME+" (" + TableData.TableInfo.UID_INSERTION+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.PATH_INSERTION +" VARCHAR(255)," + TableData.TableInfo.TAILLE_INSERTION+ " VARCHAR(255)," + TableData.TableInfo.DATE_ATEMPORAIRE+ 
" VARCHAR(255));"; 

private static final String CREATE_AGEOGRAPHIQUE = "CREATE TABLE " + TableData.TableInfo.TABLE_AGEOGRAPHIQUE+" (" + TableData.TableInfo.UID_INSERTION+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.PATH_INSERTION +" VARCHAR(255)," + TableData.TableInfo.TAILLE_INSERTION+ " VARCHAR(255)," + TableData.TableInfo.LOCALISATION_AGEOGRAPHIQUE+ 
" VARCHAR(255));"; 

private static final String CREATE_IMAGE = "CREATE TABLE " + TableData.TableInfo.TABLE_IMAGE_NAME+" (" + TableData.TableInfo.UID_INSERTION+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.PATH_INSERTION +" VARCHAR(255)," + TableData.TableInfo.TAILLE_INSERTION+ " VARCHAR(255));" ; 

private static final String CREATE_AUDIO = "CREATE TABLE " + TableData.TableInfo.TABLE_AUDIO_NAME+" (" + TableData.TableInfo.UID_INSERTION+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.PATH_INSERTION +" VARCHAR(255)," + TableData.TableInfo.TAILLE_INSERTION+ " VARCHAR(255));" ; 

private static final String CREATE_VIDEO = "CREATE TABLE " + TableData.TableInfo.TABLE_VIDEO_NAME+" (" + TableData.TableInfo.UID_INSERTION+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.PATH_INSERTION +" VARCHAR(255)," + TableData.TableInfo.TAILLE_INSERTION+ " VARCHAR(255));" ; 

private static final String CREATE_DOCUMENT = "CREATE TABLE " + TableData.TableInfo.TABLE_DOCUMENT_NAME+" (" + TableData.TableInfo.UID_INSERTION+ 
" INTEGER PRIMARY KEY AUTOINCREMENT,"+ TableData.TableInfo.PATH_INSERTION +" VARCHAR(255)," + TableData.TableInfo.TAILLE_INSERTION+ " VARCHAR(255));" ; 


public DataBaseOperationstwo(Context context){ 
super(context, TableData.TableInfo.DATABASE_NAME,null,database_version); 
Log.d("SANADATABASE OPERATIONS", "DATABASE CREATED"); 


} 



    @Override 
    public void onCreate(SQLiteDatabase db) { 

     try { 
      db.execSQL(CREATE_QUERY); 

      Log.d("SANADATABASE OPERATIONS","note CREATED"); 
     } catch (android.database.SQLException e) { 
      e.printStackTrace(); 
     } 

    } 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 

     try { 
      db.execSQL(CREATE_USER); 
      db.execSQL(CREATE_NOTE); 
      db.execSQL(CREATE_ARCHIVE); 

      db.execSQL(CREATE_INSCRIPTION); 
      db.execSQL(CREATE_AUTHENTIFICATION); 
      db.execSQL(CREATE_MESSAGE); 
      db.execSQL(CREATE_MESSAGE_FORUM); 
      db.execSQL(CREATE_FORUM); 
      db.execSQL(CREATE_NOTIFICATION); 
      db.execSQL(CREATE_INSERTION); 
      db.execSQL(CREATE_ATEMPORAIRE); 
      db.execSQL(CREATE_AGEOGRAPHIQUE); 
      db.execSQL(CREATE_IMAGE); 
      db.execSQL(CREATE_AUDIO); 
      db.execSQL(CREATE_VIDEO); 
      db.execSQL(CREATE_DOCUMENT); 
      onCreate(db); 
      Log.d("SANADATABASE OPERATIONS","new tables CREATED"); 
     } catch (android.database.SQLException e) { 
      Log.d("SANADATABASE OPERATIONS","error"+e); 
     } 

    } 
    public void putuser(DataBaseOperationstwo dop,String nom,String prenom,String datenaiss,String mail,String login,String pwd,String genre) 
    { 
     SQLiteDatabase sqLiteDatabase= dop.getWritableDatabase(); 
     ContentValues cv = new ContentValues(); 
     cv.put(TableData.TableInfo.NOM, nom); 
     cv.put(TableData.TableInfo.PRENOM, prenom); 
     cv.put(TableData.TableInfo.DATE_NAISS, datenaiss); 
     cv.put(TableData.TableInfo.E_MAIL, mail); 
     cv.put(TableData.TableInfo.LOGIN, login); 
     cv.put(TableData.TableInfo.MOT_PASSE, pwd); 
     cv.put(TableData.TableInfo.GENRE, genre); 

     long k = sqLiteDatabase.insert(TableData.TableInfo.TABLE_USER,null,cv); 
     Log.d("SANADATABASE OPERATIONS","One row inserted "); 


    } 
    public Cursor getloginuser(DataBaseOperationstwo dop) 
    { 
     SQLiteDatabase SQ = dop.getReadableDatabase(); 
     String[] coloums = {TableData.TableInfo.LOGIN, TableData.TableInfo.MOT_PASSE}; 
     Cursor CR = SQ.query(TableData.TableInfo.TABLE_USER,coloums,null,null,null,null,null); 
     return CR; 


    } 
    public void putnote(DataBaseOperationstwo dop,String titre,String objet) 
    { 
     SQLiteDatabase sqLiteDatabase= dop.getWritableDatabase(); 
     ContentValues cv = new ContentValues(); 
     cv.put(TableData.TableInfo.TITRE, titre); 
     cv.put(TableData.TableInfo.OBJET, objet); 


     long k = sqLiteDatabase.insert(TableData.TableInfo.TABLE_USER,null,cv); 
     Log.d("SANADATABASE OPERATIONS","One row inserted "); 


    } 
    }

最後但並非最不重要的我的logcat當我嘗試打開我的應用程序：

04-30 13:41:43.796 1388-1388/com.example.hp.memorybackup D/AndroidRuntime﹕ Shutting down VM 
04-30 13:41:43.816 1388-1388/com.example.hp.memorybackup W/dalvikvm﹕ threadid=1: thread exiting with uncaught exception (group=0x40a71930) 
04-30 13:41:44.156 1388-1388/com.example.hp.memorybackup E/AndroidRuntime﹕ FATAL EXCEPTION: main 
    java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.hp.memorybackup/com.example.hp.memorybackup.Connexion}: java.lang.NullPointerException 
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2106) 
      at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
      at android.app.ActivityThread.access$600(ActivityThread.java:141) 
      at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
      at android.os.Handler.dispatchMessage(Handler.java:99) 
      at android.os.Looper.loop(Looper.java:137) 
      at android.app.ActivityThread.main(ActivityThread.java:5041) 
      at java.lang.reflect.Method.invokeNative(Native Method) 
      at java.lang.reflect.Method.invoke(Method.java:511) 
      at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
      at dalvik.system.NativeStart.main(Native Method) 
    Caused by: java.lang.NullPointerException 
      at android.content.ContextWrapper.getResources(ContextWrapper.java:89) 
      at android.view.ContextThemeWrapper.getResources(ContextThemeWrapper.java:78) 
      at android.widget.Toast.<init>(Toast.java:92) 
      at android.widget.Toast.makeText(Toast.java:238) 
      at com.example.hp.memorybackup.Connexion.<init>(Connexion.java:34) 
      at java.lang.Class.newInstanceImpl(Native Method) 
      at java.lang.Class.newInstance(Class.java:1319) 
      at android.app.Instrumentation.newActivity(Instrumentation.java:1054) 
      at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097) 
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 
            at android.app.ActivityThread.access$600(ActivityThread.java:141) 
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 
            at android.os.Handler.dispatchMessage(Handler.java:99) 
            at android.os.Looper.loop(Looper.java:137) 
            at android.app.ActivityThread.main(ActivityThread.java:5041) 
            at java.lang.reflect.Method.invokeNative(Native Method) 
            at java.lang.reflect.Method.invoke(Method.java:511) 
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 
            at dalvik.system.NativeStart.main(Native Method) 
04-30 13:42:07.967 1388-1388/com.example.hp.memorybackup I/Process﹕ Sending signal. PID: 1388 SIG: 9

然而它在我的Android清單中聲明。

來源

2015-04-30 Sana Zorgui

你不能聲明和初始化一個需要Context對象的類成員，同時 – Blackbelt

什麼是行號Connexion.java:34？ – Gattsu

@Blackbelt對不起，我沒有'unterstand可以解釋更多？ –

在你的代碼中，你得到的資源ID錯誤添加R.id使用以下這將幫助你。

b = (Button) findViewById(R.id.connexion); 
PWDEDIT = (EditText) findViewById(R.id.passwordeditText); 
LOGINEDIT = (EditText) findViewById(R.id.logineditText);

當您從textview中獲取文本時，由於錯誤地找到了ViewById，它爲空。

來源

2015-04-30 13:53:59

嗨，我做了你說的，但問題仍然存在 –

現在異常是相同或不同於最後例外？如果不同請張貼該日誌這可能有助於找出問題 –

恐怕它是axact相同的exeption以及它是與日誌代碼相關的東西其餘的用於完美工作，當我試圖添加登錄代碼它崩潰我希望這可以幫助解決這個問題 –

不幸的是，應用程序已經停止在登錄

回答

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