My app runs fine on first run. On the Menu I added two choices options and quit. options which set up a new intent who goes to a PreferenceActivity and quit which simply call: "android.os.Process.killProcess(android.os.Process.myPid());"

On the second time I run my app (after I quit from inside the emulator) it crashes.. Ideas? the menu is called by the foolowing code:

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu , menu);
        return true;
    }

-

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Set up a new intent between the updater service and the main screen
    Intent options = new Intent(this, OptionsScreenActivity.class);

    // Switch case on the options
    switch (item.getItemId()) {
    case R.id.options:
        startActivity(options);
        return true;
    case R.id.quit:
        android.os.Process.killProcess(android.os.Process.myPid());
        return true;
    default:
        return false;
    }

Code for SeekBarPreference:

package com.testapp.logic;
import com.testapp.R;

import android.content.Context;
import android.content.res.TypedArray;
import android.preference.Preference;
import android.util.AttributeSet;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.RelativeLayout;
import android.widget.SeekBar;
import android.widget.SeekBar.OnSeekBarChangeListener;
import android.widget.TextView;

public class SeekBarPreference extends Preference implements OnSeekBarChangeListener {

    private final String TAG = getClass().getName();

    private static final String ANDROIDNS="http://schemas.android.com/apk/res/android";
    private static final String PREFS="com.testapp.logic";
    private static final int DEFAULT_VALUE = 5;

    private int mMaxValue      = 100;
    private int mMinValue      = 1;
    private int mInterval      = 1;
    private int mCurrentValue;
    private String mUnitsLeft  = "";
    private String mUnitsRight = "";
    private SeekBar mSeekBar;

    private TextView mStatusText;

    public SeekBarPreference(Context context, AttributeSet attrs) {
        super(context, attrs);
        initPreference(context, attrs);
    }

    public SeekBarPreference(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
        initPreference(context, attrs);
    }

    private void initPreference(Context context, AttributeSet attrs) {
        setValuesFromXml(attrs);
        mSeekBar = new SeekBar(context, attrs);
        mSeekBar.setMax(mMaxValue - mMinValue);
        mSeekBar.setOnSeekBarChangeListener(this);
    }

    private void setValuesFromXml(AttributeSet attrs) {
        mMaxValue = attrs.getAttributeIntValue(ANDROIDNS, "max", 100);
        mMinValue = attrs.getAttributeIntValue(PREFS, "min", 0);

        mUnitsLeft = getAttributeStringValue(attrs, PREFS, "unitsLeft", "");
        String units = getAttributeStringValue(attrs, PREFS, "units", "");
        mUnitsRight = getAttributeStringValue(attrs, PREFS, "unitsRight", units);

        try {
            String newInterval = attrs.getAttributeValue(PREFS, "interval");
            if(newInterval != null)
                mInterval = Integer.parseInt(newInterval);
        }
        catch(Exception e) {
            Log.e(TAG, "Invalid interval value", e);
        }

    }

    private String getAttributeStringValue(AttributeSet attrs, String namespace, String name, String defaultValue) {
        String value = attrs.getAttributeValue(namespace, name);
        if(value == null)
            value = defaultValue;

        return value;
    }

    @Override
    protected View onCreateView(ViewGroup parent){

        RelativeLayout layout =  null;

        try {
            LayoutInflater mInflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

            layout = (RelativeLayout)mInflater.inflate(R.layout.seek_bar_preference, parent, false);
        }
        catch(Exception e)
        {
            Log.e(TAG, "Error creating seek bar preference", e);
        }

        return layout;

    }

    @Override
    public void onBindView(View view) {
        super.onBindView(view);

        try
        {
            // move our seekbar to the new view we've been given
            ViewParent oldContainer = mSeekBar.getParent();
            ViewGroup newContainer = (ViewGroup) view.findViewById(R.id.seekBarPrefBarContainer);

            if (oldContainer != newContainer) {
                // remove the seekbar from the old view
                if (oldContainer != null) {
                    ((ViewGroup) oldContainer).removeView(mSeekBar);
                }
                // remove the existing seekbar (there may not be one) and add ours
                newContainer.removeAllViews();
                newContainer.addView(mSeekBar, ViewGroup.LayoutParams.FILL_PARENT,
                        ViewGroup.LayoutParams.WRAP_CONTENT);
            }
        }
        catch(Exception ex) {
            Log.e(TAG, "Error binding view: " + ex.toString());
        }

        updateView(view);
    }

    /**
     * Update a SeekBarPreference view with our current state
     * @param view
     */
    protected void updateView(View view) {

        try {
            RelativeLayout layout = (RelativeLayout)view;

            mStatusText = (TextView)layout.findViewById(R.id.seekBarPrefValue);
            mStatusText.setText(String.valueOf(mCurrentValue));
            mStatusText.setMinimumWidth(30);

            mSeekBar.setProgress(mCurrentValue - mMinValue);

            TextView unitsRight = (TextView)layout.findViewById(R.id.seekBarPrefUnitsRight);
            unitsRight.setText(mUnitsRight);

            TextView unitsLeft = (TextView)layout.findViewById(R.id.seekBarPrefUnitsLeft);
            unitsLeft.setText(mUnitsLeft);

        }
        catch(Exception e) {
            Log.e(TAG, "Error updating seek bar preference", e);
        }

    }


    public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
        int newValue = progress + mMinValue;

        if(newValue > mMaxValue)
            newValue = mMaxValue;
        else if(newValue < mMinValue)
            newValue = mMinValue;
        else if(mInterval != 1 && newValue % mInterval != 0)
            newValue = Math.round(((float)newValue)/mInterval)*mInterval;  

        // change rejected, revert to the previous value
        if(!callChangeListener(newValue)){
            seekBar.setProgress(mCurrentValue - mMinValue); 
            return; 
        }

        // change accepted, store it
        mCurrentValue = newValue;
        mStatusText.setText(String.valueOf(newValue));
        persistInt(newValue);

    }


    public void onStartTrackingTouch(SeekBar seekBar) {}


    public void onStopTrackingTouch(SeekBar seekBar) {
        notifyChanged();
    }


    @Override 
    protected Object onGetDefaultValue(TypedArray ta, int index){

        int defaultValue = ta.getInt(index, DEFAULT_VALUE);
        return defaultValue;

    }

    @Override
    protected void onSetInitialValue(boolean restoreValue, Object defaultValue) {

        if(restoreValue) {
            mCurrentValue = getPersistedInt(mCurrentValue);
        }
        else {
            int temp = 0;
            try {
                temp = (Integer)defaultValue;
            }
            catch(Exception ex) {
                Log.e(TAG, "Invalid default value: " + defaultValue.toString());
            }

            persistInt(temp);
            mCurrentValue = temp;
        }

    }

}

Logcat:

E/AndroidRuntime( 4525): FATAL EXCEPTION: main
E/AndroidRuntime( 4525): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.ui.testapp/com.logic.testapp.SeekBarPreferen
ce}: java.lang.InstantiationException: can't instantiate class com.logic.testapp.SeekBarPreference; no empty constructor
E/AndroidRuntime( 4525):        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1879)
E/AndroidRuntime( 4525):        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1980)
E/AndroidRuntime( 4525):        at android.app.ActivityThread.access$600(ActivityThread.java:122)
E/AndroidRuntime( 4525):        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1146)
E/AndroidRuntime( 4525):        at android.os.Handler.dispatchMessage(Handler.java:99)
E/AndroidRuntime( 4525):        at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 4525):        at android.app.ActivityThread.main(ActivityThread.java:4340)
E/AndroidRuntime( 4525):        at java.lang.reflect.Method.invokeNative(Native Method)
E/AndroidRuntime( 4525):        at java.lang.reflect.Method.invoke(Method.java:511)
E/AndroidRuntime( 4525):        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
E/AndroidRuntime( 4525):        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
E/AndroidRuntime( 4525):        at dalvik.system.NativeStart.main(Native Method)
E/AndroidRuntime( 4525): Caused by: java.lang.InstantiationException: can't instantiate class com.logic.testapp.SeekBarPreference; no empty construc
tor
E/AndroidRuntime( 4525):        at java.lang.Class.newInstanceImpl(Native Method)
E/AndroidRuntime( 4525):        at java.lang.Class.newInstance(Class.java:1319)
E/AndroidRuntime( 4525):        at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
E/AndroidRuntime( 4525):        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1870)
E/AndroidRuntime( 4525):        ... 11 more
W/ActivityManager(   84):   Force finishing activity com.ui.testapp/com.logic.testapp.SeekBarPreference
W/ActivityManager(   84):   Force finishing activity com.ui.testapp/.MainScreen
I/WindowManager(   84): createSurface Window{41a90320  paused=false}: DRAW NOW PENDING
W/ActivityManager(   84): Activity pause timeout for ActivityRecord{4104a848 com.ui.testapp/com.logic.testapp.SeekBarPreference}
W/NetworkManagementSocketTagger(   84): setKernelCountSet(10021, 1) failed with errno -2
I/WindowManager(   84): createSurface Window{412bcc10 com.android.launcher/com.android.launcher2.Launcher paused=false}: DRAW NOW PENDING
W/NetworkManagementSocketTagger(   84): setKernelCountSet(10045, 0) failed with errno -2
I/Process ( 4525): Sending signal. PID: 4525 SIG: 9
I/ActivityManager(   84): Process com.ui.testapp (pid 4525) has died.
I/WindowManager(   84): WIN DEATH: Window{41a6c9c0 com.ui.testapp/com.ui.testapp.MainScreen paused=true}