Cannot be resolved or it's not a field

Vote count:

0

I am getting this error at lines "** cannot be resolver or it's not a field". mainactivity.java

    Integer num1=Integer.parseInt(number1text.getText().toString()); 
num2=Integer.parseInt(number2text.getText().toString()), 
num3=Integer.parseInt(number3text.getText().toString());
        Integer del= num2*num2+4*num1*num3 ;
        Integer x1=-num2-del/2*num1 ;
        Integer x2=-num2+del/2*num1 ;
        TextView delta=(TextView)findViewById(R.id.deltatxt);
        TextView x1=(TextView)findViewById(R.id.x1txt);
        TextView x2=(TextView)findViewById(R.id.x2txt);
        delta.setText("Delta:"+del.toString());
        x1.setText("X1:"+x1.toString());
        x2.setText("X2:"+x2.toString());

fragment main.xml:

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
    xmlns:tools="http://ift.tt/LrGmb4"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.ecuatiadegradul2.MainActivity$PlaceholderFragment" >

    <TextView
        android:id="@+id/num1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:text="@string/num1" />

    <EditText
        android:id="@+id/num1txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/num1"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/num1"
        android:ems="10" >

        <requestFocus />
    </EditText>

    <TextView
        android:id="@+id/num2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/num1txt"
        android:layout_below="@+id/num1txt"
        android:text="@string/num2" />

    <EditText
        android:id="@+id/num2txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/num2"
        android:layout_alignRight="@+id/num1txt"
        android:layout_below="@+id/num2"
        android:ems="10" />

    <TextView
        android:id="@+id/num3"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/num2txt"
        android:layout_below="@+id/num2txt"
        android:text="@string/num3" />

    <EditText
        android:id="@+id/num3txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/num3"
        android:layout_alignRight="@+id/num2txt"
        android:layout_below="@+id/num3"
        android:ems="10" />

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/num3text"
        android:layout_alignRight="@+id/num3text"
        android:layout_below="@+id/num3text"
        android:text="@string/calc"
        andoird:OnClick="calculate" />

    <TextView
        android:id="@+id/deltatxt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/button1"
        android:text="@string/del" />

    <TextView
        android:id="@+id/x2txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/x1txt"
        android:layout_alignBottom="@+id/x1txt"
        android:layout_alignRight="@+id/button1"
        android:layout_marginRight="48dp"
        android:text="@string/x2" />

    <TextView
        android:id="@+id/x1txt"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/deltatxt"
        android:layout_marginTop="68dp"
        android:layout_toRightOf="@+id/deltatxt"
        android:text="@string/x1" />

</RelativeLayout>

So I have added that id's but they are not recognised in mainactivity. I'm sorry but I'm new in this and I really need help. Thanks a lot!

asked 2 mins ago

user3450385

1