Android populate bouton radio à partir d'une table de base de données

J'ai suivi ce tutoriel this tutorial et configurer mes bases de données et l'activité principale pour s'adapter au tutoriel. Et je reçois une erreur:Android populate bouton radio à partir d'une table de base de données

E/AndroidRuntime(281): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.xxx.xxx/com.xxx.xxx.Tamar_appActivity}: java.lang.NullPointerException

Le code Tamar_appActivity est:

 DatBas db = new DatBas(this); 
    TamarDatabaseCursor c = db.getActress(); 

    if (c.moveToFirst()) 
     DisplayRadioButton(c); 
    else 
     Toast.makeText(this, "No title found", Toast.LENGTH_LONG).show(); 
    db.close(); 

} 

public void DisplayRadioButton(Cursor c) { 
    for (int i = 1; i < (c.getColumnCount()); i++) { 
     RadioGroup radiogroup = (RadioGroup)  findViewById(R.id.NameSelectGroup); 
     RadioButton rdbtn = new RadioButton(this); 
     rdbtn.setId(i); 
     rdbtn.setText(c.getString(i)); 
     radiogroup.addView(rdbtn); 
    } 

}

Et le Code datbase est:

public class DatBas { 


public static final String KEY_ROW_ID = "_id"; 
public static final String KEY_IMAGE_PATH = "uri"; 
public static final String KEY_NAME = "name"; 
public static final String KEY_GENDER = "gender"; 
public static final String KEY_BORN_DATE_YEAR = "age_year"; 
public static final String KEY_BORN_DATE_MONTH = "age_month"; 
public static final String KEY_BORN_DATE_DAY = "age_day"; 

private static final String DATABASE_NAME = "TamatDB"; 
private static final String DATABASE_TABLE_SETTINGS = "settings"; 

private static final int DATABASE_VERSION = 20; 

private TamarDatabase thdb; 
private static Context tcontext; 
private SQLiteDatabase tdb; 

private static class TamarDatabase extends SQLiteOpenHelper { 

    public TamarDatabase(Context context) { 
     super(context, DATABASE_NAME, null, DATABASE_VERSION); 
    } 

    @Override 
    public void onCreate(SQLiteDatabase db) { 
     String ctSettings = "CREATE TABLE " + DATABASE_TABLE_SETTINGS 
       + " (" + KEY_ROW_ID 
       + " INTEGER PRIMARY KEY AUTOINCREMENT, " 
       + KEY_IMAGE_PATH + " TEXT NOT NULL, " + KEY_NAME 
       + " TEXT NOT NULL, " + KEY_GENDER + " TEXT NOT NULL, " 
       + KEY_BORN_DATE_YEAR + " TEXT NOT NULL, " 
       + KEY_BABY_DATE_MONTH + " TEXT NOT NULL, " 
       + KEY_BABY_DATE_DAY + " TEXT NOT NULL);"; 
     db.execSQL(ctSettings); 

    } 

    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
     db.execSQL("DROP TABLE IF EXISTS " + DATABASE_TABLE_SETTINGS); 
     onCreate(db); 
    } 
} 

public DatBas(Context c) { 
    tcontext = c; 
} 

public DatBas open() throws SQLiteException { 
    thdb = new TamarDatabase(tcontext); 
    tdb = thdb.getWritableDatabase(); 
    return this; 
} 

public void close() { 
    thdb.close(); 
} 

public long createEntrySettings(String bbdy, String bbdm, String bbdd, 
     String pt, String bg, String bfName) { 
    ContentValues cv2 = new ContentValues(); 
    cv2.put(KEY_IMAGE_PATH, pt); 
    cv2.put(KEY_NAME, bfName); 
    cv2.put(KEY_GENDER, bg); 
    cv2.put(KEY_BORN_DATE_YEAR, bbdy); 
    cv2.put(KEY_BORN_DATE_MONTH, bbdm); 
    cv2.put(KEY_BORN_DATE_DAY, bbdd); 

    return tdb.insert(DATABASE_TABLE_SETTINGS, null, cv2); 
} 

public Cursor getDataSettings() { 
    String[] columns = new String[] { KEY_ROW_ID, KEY_IMAGE_PATH, 
      KEY_NAME, KEY_GENDER, KEY_BORN_DATE_YEAR, 
      KEY_BORN_DATE_MONTH, KEY_BORN_DATE_DAY }; 
    Cursor c = tdb.query(DATABASE_TABLE_SETTINGS, columns, null, null, 
      null, null, null); 
    String results = ""; 

    int iRawId = c.getColumnIndex(KEY_ROW_ID); 
    int iBIPath = c.getColumnIndex(KEY_IMAGE_PATH); 
    int iBName = c.getColumnIndex(KEY_NAME); 
    int iGender = c.getColumnIndex(KEY_GENDER); 
    int iBBDateYear = c.getColumnIndex(KEY_BORN_DATE_YEAR); 
    int iBBDateMonth = c.getColumnIndex(KEY_BORN_DATE_MONTH); 
    int iBBDateDay = c.getColumnIndex(KEY_BORN_DATE_DAY); 

    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { 
     results = results + " the kind is " + " " + c.getString(iRawId) 
       + " the kind is " + " " + c.getString(iBIPath) 
       + " the kind is " + " " + c.getString(iBName) 
       + " the kind is " + " " + c.getString(iGender) 
       + " the kind is " + " " + c.getString(iBBDateYear) 
       + " the kind is " + " " + c.getString(iBBDateMonth) 
       + " the kind is " + " " + c.getString(iBBDateDay) + "\n"; 
    } 
    return c; 
} 

public String getDataSettingsBabyName() { 
    String[] columns = new String[] { KEY_ROW_ID, KEY_NAME}; 
    Cursor c = tdb.query(DATABASE_TABLE_SETTINGS, columns, null, null, 
      null, null, null); 
    String results = ""; 

    int iRawId = c.getColumnIndex(KEY_ROW_ID); 
    int iBName = c.getColumnIndex(KEY_NAME); 

    for (c.moveToFirst(); !c.isAfterLast(); c.moveToNext()) { 
     String[] resultsS = new String[]{c.getString(iRawId), c.getString(iBName)  
     }; 
    } 
    return results; 
} 




public static class TamarDatabaseCursor extends SQLiteCursor{ 

    /** The query for this cursor */ 
    private static final String QUERY = 
     "SELECT _id, uri, baby_name, gender, age_year, age_month, age_day" + 
     " FROM settings"; 

    /** Cursor constructor */ 
    private TamarDatabaseCursor(SQLiteDatabase db, SQLiteCursorDriver driver, 
      String editTable, SQLiteQuery query) { 
     super(db, driver, editTable, query); 
    } 
    /** Private factory class necessary for rawQueryWithFactory() call */ 

    private static class Factory implements SQLiteDatabase.CursorFactory{ 
     public Cursor newCursor(SQLiteDatabase db, 
       SQLiteCursorDriver driver, String editTable, 
       SQLiteQuery query) { 
      return new TamarDatabaseCursor(db, driver, editTable, query); 
     } 
    } 
    /* Accessor functions get one per database column */ 

    public int getActressId(){return getInt(getColumnIndexOrThrow("actress.actressId"));} 

} 



public TamarDatabaseCursor getActress() 
{ 
SQLiteDatabase d = getReadableDatabase(); 
TamarDatabaseCursor c = (TamarDatabaseCursor)d.rawQueryWithFactory 
     (new TamarDatabaseCursor.Factory(), TamarDatabaseCursor.QUERY, null, null); 
c.moveToFirst(); 
return c; 
} 



private SQLiteDatabase getReadableDatabase() { 
    // TODO Auto-generated method stub 
    return null; 
} 

public DatBas delete() { 
    tdb.delete(DATABASE_TABLE, null, null); 
    tdb.delete(DATABASE_TABLE_SETTINGS, null, null); 
    return null; 
} 
}

Le XML principal est:

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:background="#3691c9" 
android:orientation="vertical" > 

<RadioGroup 
    android:id="@+id/sideGroup" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal" 
    android:weightSum="100" > 

    <RadioButton 
     android:id="@+id/rbtnLeft" 
     android:layout_width="160dp" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_weight="50" 
     android:text="xxx" /> 

    <RadioButton 
     android:id="@+id/rbtnRight" 
     android:layout_width="160dp" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_weight="50" 
     android:text="xxx" /> 
</RadioGroup> 

<RadioGroup 
    android:id="@+id/kindGroup" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:orientation="horizontal" 
    android:weightSum="100" > 

    <RadioButton 
     android:id="@+id/rbtnN" 
     android:layout_width="160dp" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_weight="50" 
     android:text="xxx" /> 

    <RadioButton 
     android:id="@+id/rbtnP" 
     android:layout_width="160dp" 
     android:layout_height="wrap_content" 
     android:layout_gravity="center" 
     android:layout_weight="50" 
     android:text="xxx" /> 
</RadioGroup> 

<TextView 
    android:id="@+id/textView1" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:layout_gravity="center" 
    android:text="TextView" 
    android:textColor="#363636" 
    android:textSize="25dp" /> 

<TextView 
    android:id="@+id/textView2" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:gravity="center" 
    android:text="TextView" 
    android:textColor="#363636" 
    android:textSize="40dp" 
    android:textStyle="bold" /> 

<Button 
    android:id="@+id/button2" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:text="Start" /> 

<Button 
    android:id="@+id/button3" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:text="Pause" /> 

<Button 
    android:id="@+id/Button4" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:text="Resume" /> 

<Button 
    android:id="@+id/button1" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:text="Stop" /> 

<RadioGroup 
    android:id="@+id/NameSelectGroup" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" > 

    <RadioButton 
     android:id="@+id/bNameSelect" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:orientation="horizontal" 
     android:text="RadioButton" /> 
</RadioGroup> 

<ImageButton 
    android:id="@+id/imageButton1" 
    android:layout_width="38dp" 
    android:layout_height="37dp" 
    android:src="@android:drawable/ic_menu_manage" /> 

<ImageView 
    android:id="@+id/imageView1" 
    android:layout_width="160dp" 
    android:layout_height="160dp" 
    android:layout_gravity="center" 
    android:src="@android:drawable/gallery_thumb" /> 

</LinearLayout>

Source

2012-05-19 Dori

Qu'est-ce que la ligne 281? –

RadioGroup radiogroup = (RadioGroup) findViewById (R.id.NameSelectGroup); – Dori

J'ai regardé le tutoriel et mon avis est que c'est un très mauvais tutoriel. Par exemple, l'instruction select: 'SELECT actressId, actress1, actress2, actress3, actress4 DE l'actrice;' Je préfère passer à autre chose et trouver autre chose. À l'heure actuelle Googling SQLite android et le bouton radio conduit souvent à ce mauvais tutoriel. –

Je voudrais hazar d une estimation que findViewById(R.id.babyNameSelectGroup); renvoie null, et lorsque vous essayez de radiogroup.addView(rdbtn); vous obtenez le NPE.

Avez-vous fait setContentView(R.layout.yourmainlayout); avant d'essayer d'accéder à une vue contenue dans votre mise en page?

EDIT

Votre recherchent babyNameSelectGroup, qui ne semble pas exister dans votre mise en page (vous donnant ainsi la NPE). Peut-être que cela devrait être NameSelectGroup?

Source

2012-05-19 06:01:00 Barak

oui j'ai défini le mainLayout: \t public void onCreate (Bundle savedInstanceState) { \t \t super.onCrée (savedInstanceState); \t \t setContentView (R.layout.main); – Dori

OK. Que diriez-vous de poster le XML qui contient 'NameSelectGroup'? – Barak

Que voulez-vous dire par "post"? – Dori

J'ai dû mettre une méthode getReadableDatabase():

public SQLiteDatabase getReadableDatabase() throws SQLiteException { 
    thdb = new TamarDatabase(tcontext); 
    tdb = thdb.getReadableDatabase(); 
    return tdb; 
}

Source

2012-05-20 11:28:30 Dori

Android populate bouton radio à partir d'une table de base de données

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