First I will mention that I am totally new to programming. 
I have created a button in an .xml file by using the "Graphical layout". I can see the buttons ID is "@+id/button1". Here is the .xml codes from the file: 

```
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="fill_parent"
    android:layout_height="fill_parent">
    <Button android:text="Button"
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
    </Button>
</LinearLayout>`

```

When I then go the the java file and try to find the "button" I type "findViewById(R.id)" right under a line that says "setContentView(R.layout.main);" and click "ctrl+space" it says "no default proposals". The .xml codes are: 

```
package com.soren.activies;

import android.app.Activity;
import android.os.Bundle;

 public class mail extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    Button b = findViewById(R.id)

}

```

Hope you can help me out here because, I could really use some help. ¨
By the way, sorry for my bad English.