error in android studio

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error-handling

Main Activity

package com.maurya.appcontrol;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;


public class MainActivity extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Button but2 = (Button) findViewById(R.id.button1);
        but2.setOnClickListener(new View.OnClickListener() {

            Intent in = new Intent("com.example.appcontrol.Pref");

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                startActivity(in);
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }
}

preference screen activity

package com.maurya.appcontrol;

import android.app.Activity;
import android.os.Bundle;
public class Backup extends Activity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        //--load the preferences from an XML file---
        addPreferencesFromResource"(int appsbackup)";

Sir i am new but learning from the web. I tried to make a simple apk wherein ckick on the text lead to separate activity screen. BUT I AM GETING ERROR the (addPreferencesFromResource"(int appsbackup). I TRIED EVEN (R.xml.appsbackup), but error persist.

can you please help me out. Another related question is whether i can link the multiple preference activity screen with list text in main screen...

Regards