判断某张表是否存在

/**
* 判断某张表是否存在
* @param tabName 表名
* @return
*/
public boolean tabIsExist(String tabName){
boolean result = false;
if(tabName == null){
return false;
}
SQLiteDatabase db = null;
Cursor cursor = null;
try {
db = this.getReadableDatabase();//此this是继承SQLiteOpenHelper类得到的
String sql = select count(*) as c from sqlite_master where type ='table' and name ='+tabName.trim()+' ;
cursor = db.rawQuery(sql, null);
if(cursor.moveToNext()){
int count = cursor.getInt(0);
if(count>0){
result = true;
}
}

} catch (Exception e) {
// TODO: handle exception
}
return result;
}