SettingACTIVITY.java

package cn.edu.njupt.allgo.activity;


import cn.edu.njupt.allgo.R;
import android.app.ActionBar;
import android.app.Activity;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
import android.os.Bundle;
import android.preference.PreferenceFragment;
import android.support.v4.app.NavUtils;
import android.support.v4.app.TaskStackBuilder;
import android.view.MenuItem;
import android.widget.Toast;



public class SettingACTIVITY extends BaseActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        // Display the fragment as the main content.
        getActionBar().setDisplayHomeAsUpEnabled(true);
        getFragmentManager().beginTransaction().replace(android.R.id.content,
                new PrefsFragment()).commit();
    }


    public static class PrefsFragment extends PreferenceFragment implements OnSharedPreferenceChangeListener  {

    	public static final String KEY_PREF_BACK_PULL = "background_preference";
    	
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);

            // Load the preferences from an XML resource
            addPreferencesFromResource(R.xml.preference_setting);
        }

		@Override
		public void onSharedPreferenceChanged(
				SharedPreferences sharedPreferences, String key) {
			 //Toast.makeText(getActivity(), "改变了==>" + key , Toast.LENGTH_SHORT).show();
			
		}
		
		@Override
		public void onResume() {
		    super.onResume();
		    getPreferenceScreen().getSharedPreferences()
		            .registerOnSharedPreferenceChangeListener(this);
		}

		@Override
		public void onPause() {
		    super.onPause();
		    getPreferenceScreen().getSharedPreferences()
		            .unregisterOnSharedPreferenceChangeListener(this);
		}
		
    }

    
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()) {
            case android.R.id.home:
               finish();
        }
        return super.onOptionsItemSelected(item);
    }
    
}