SlidingMenuActivity.java

package net.tasksnow.view.slidingmenu;

import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentTransaction;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.MenuItem;

import net.tasksnow.R;
import net.tasksnow.view.slidingmenu.SlidingMenuListView.OnCategorySelectListener;

import com.luma.android.andrologger.Logger;
import com.slidingmenu.lib.SlidingMenu;


/**
 * @author D056943
 * @since 10:25:49 - 19.12.2012
 * @project cFoldersDemo
 */
public abstract class SlidingMenuActivity extends Activity implements OnCategorySelectListener {

    // ===========================================================
    // Constants
    // ===========================================================
    private static final String MENU_OPEN_KEY = "menuopen_key";
    // ===========================================================
    // Fields
    // ===========================================================
    protected SlidingMenu menu;

    // ===========================================================
    // Constructors
    // ===========================================================

    // ===========================================================
    // Methods for/from SuperClass/Interfaces
    // ===========================================================
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        this.setContentView(R.layout.slidingmenu_activity);

        this.menu = (SlidingMenu) LayoutInflater.from(this).inflate(R.layout.slidingmenu, null);
        this.menu.attachToActivity(this, SlidingMenu.SLIDING_WINDOW);
        this.menu.setMenu(R.layout.menu_list);

        this.getSlidingMenuListView().setOnCategorySelectListener(this);

        MenuContent menuContent = (MenuContent) this.getLastNonConfigurationInstance();
        if (menuContent == null) {
            menuContent = this.onGenerateListAdapter();
        }
        this.getSlidingMenuListView().setMenuContent(menuContent);
        this.getSlidingMenuListView().updateListAdapter();

        if (this.getActionBar() != null)
            this.getActionBar().setDisplayHomeAsUpEnabled(true);

        if (this.findViewById(R.id.container_list) != null) {

            // However, if we're being restored from a previous state,
            // then we don't need to do anything and should return or else
            // we could end up with overlapping fragments.
            if (savedInstanceState != null) {
                return;
            }

            // Create an instance of ExampleFragment
            Fragment firstFragment = this.getFirstFragment();

            // In case this activity was started with special instructions from an Intent,
            // pass the Intent's extras to the fragment as arguments
            firstFragment.setArguments(this.getIntent().getExtras());

            // Add the fragment to the 'fragment_container' FrameLayout
            this.getFragmentManager().beginTransaction().add(R.id.container_list, firstFragment).commit();
        }
        Logger.onCreate(this);

    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        Logger.onDestroy(this);
    }

    @Override
    protected void onResume() {
        super.onResume();
        Logger.onResume(this);
    }

    @Override
    public Object onRetainNonConfigurationInstance() {
        return this.getSlidingMenuListView().getMenuContent();
    }

    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);
        if (savedInstanceState != null) {
            if (savedInstanceState.getBoolean(MENU_OPEN_KEY)) {
                this.menu.showMenu();
            }
        }
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        outState.putBoolean(MENU_OPEN_KEY, this.menu.isMenuShowing());
    }

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

    @Override
    public void onCategorySelected(Object executeObject) {

        if ((executeObject != null) && (executeObject instanceof Fragment)) {
            this.replaceContentFragment((Fragment) executeObject);
        }

        this.getSlidingMenu().toggle();
    }

    // ===========================================================
    // Methods
    // ===========================================================

    public void replaceContentFragment(Fragment newFragment) {

        FragmentTransaction transaction = this.getFragmentManager().beginTransaction();
        // Replace whatever is in the fragment_container view with this fragment,
        // and add the transaction to the back stack so the user can navigate back

        transaction.replace(R.id.container_list, newFragment);
        //TODO Durch entfernen muss die View immer wieder neu aufgebaut werden
        // transaction.addToBackStack(null);

        // Commit the transaction
        transaction.commit();

    }

    public abstract MenuContent onGenerateListAdapter();

    public Fragment getFirstFragment() {
        Object firstExecuteObject = this.getMenuContent().getSelectedItem().onExecuteAction();
        if (firstExecuteObject instanceof Fragment) {
            return (Fragment) firstExecuteObject;
        }
        return null;
    }

    // ===========================================================
    // Getter & Setter
    // ===========================================================
    public SlidingMenu getSlidingMenu() {
        return this.menu;
    }

    public MenuContent getMenuContent() {
        return this.getSlidingMenuListView().getMenuContent();
    }

    public SlidingMenuListView getSlidingMenuListView() {
        return ((SlidingMenuListView) this.menu.getMenu());
    }
    // ===========================================================
    // Inner and Anonymous Classes
    // ===========================================================

}