SQLite डेटाबेस ..onCreate()

Question

Kohli.java

package com.kohli; 

import android.app.Activity; 
import android.os.Bundle; 
import android.util.Log; 
import android.content.Context; 

public class KohlifActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

      Log.i("KOHLIActivity", "qwert11111111"); 

      setContentView(R.layout.main); 
      Log.i("KOHILActivity", "qwert22222222222"); 

     DbHelper1 DbHelper=new DbHelper1(this) ; 

     Log.i("KOHLIfActivity", "qwert3333333333"); 



    } 
} 



DbHelper1.java 
package com.kohli; 

import android.content.Context; 
import android.database.sqlite.SQLiteDatabase; 
import android.database.sqlite.SQLiteOpenHelper; 
import android.provider.BaseColumns; 
import android.util.Log; 

public class DbHelper1 extends SQLiteOpenHelper 
{ 

    static final String TAG = "DbHelper1"; 
    static final String DB_NAME = "timeline.db"; 
    static final int DB_VERSION = 1; 
    static final String TABLE = "timeline"; 
    static final String C_ID = BaseColumns._ID; 
    static final String C_CREATED_AT = "created_at"; 
    static final String C_SOURCE = "source"; 
    static final String C_TEXT = "txt"; 
    static final String C_USER = "user"; 
    Context context; 

    public DbHelper1(Context context) { 
     super(context, DB_NAME, null, DB_VERSION); 
     this.context = context; 
     Log.d(TAG, "constructor111111"); 
     //System.out.println("dbhelper constructor"); 
    } 

    // Called only once, first time the DB is created 

    public void onCreate(SQLiteDatabase db) { 
    String sql = "create table " + TABLE + " (" + C_ID + " int primary key, " 
    + C_CREATED_AT + " int, " + C_USER + " text, " + C_TEXT + " text)"; 

    db.execSQL(sql); 
    Log.d(TAG, "onCreated sql:22222222 "); 
    //System.out.println("dbhelper oncreate"); 
    } 

    // Called whenever newVersion != oldVersion 
    @Override 
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) { 
    // Typically do ALTER TABLE statements, but...we're just in development, 
    // so: 
    db.execSQL("drop table if exists " + TABLE); // drops the old database 
    Log.d(TAG, "onUpdated 33333333"); 
    //System.out.println("dbhelper onupgrade"); 
    onCreate(db); // run onCreate to get new database 
    } 


} 

नहीं बुलाया जा रहा है मैं एक मेज के साथ एक डेटाबेस बनाने के लिए निम्नलिखित कोड लिखा था ... logcat पर उत्पादन :: qwert111111 qwert22222 constructor111111 qwert3333 है .. कि OnCreate समारोह इतना डेटाबेस भी नहीं बनाई गई है नहीं बुलाया जा रहा है ...

Answer 1

डेटाबेस वास्तव में नहीं बनाया गया है जब तक आप dbHelper वस्तु पर getWritableDatabase() कहते हैं।