android - Use variable in SQLite Query -

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Firstly I have seen many topics on this, but this issue has not been specifically addressed in Java

I have the following method 

  public string getCount () {SQLiteDatabase db = smokinDBOpenHelper.getWritableDatabase () .; String w = "home"; Cursor = db.rawkey cursor (select from "select" + smokinDBOpenHelper.INCIDENTS_TABLE + "where" + KEY_LOCATION + '=' Home '", tap); Int i = cursor.getCount (); String S = (" Your "+++" has the entries in this column;); return s;}   
 Let me place it above a specific hard-coded  string  "home" To use the variable should be  query .  
 I have tried  + {w}   + {w%}   + w  and some other, anything seems to work  *  
 
 
 Efforts to  
  cursor = db.rawQuery (select "where" + SmokinDBOpenHelper.INCIDENTS_TABLE + "" + KEY_LOCATION + "= '" + w + "' ', NULL);

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