onClick Listener on DrawerLayout Does Not Launch Toast

天大地大妈咪最大 提交于 2019-12-02 05:33:26

I recently did something very much like this. I was using Fragments but the concept is very much the same.

First I created the DrawerLayout:

    @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerList = (ListView) findViewById(R.id.left_drawer);

// read in the menu items form the string array
    String[] menuList = getResources().getStringArray(R.array.drawer_menu);
    mDrawerList.setAdapter(new ArrayAdapter<String>(this,  R.layout.drawer_list_item, menuList));
    mDrawerList.setOnItemClickListener(new DrawerItemClickListener());

Then I define the DrawerItemClickListener:

/* The click listener for ListView in the navigation drawer */
private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        selectItem(position);
    }
}

Finally I implement the selectItem method:

    private void selectItem(int position) {
    // update the main content by replacing fragments
    Fragment fragment;

    if ( position == 1 )
    {
        fragment = new CalendarFrag();
    }
    else if ( position == 2 )
    {
        fragment = new ContactsFrag();
    }
    else
    {
        fragment = new EmailListFragment();
    }

    FragmentManager fragmentManager = getSupportFragmentManager();
    fragmentManager.beginTransaction().replace(R.id.content_frame, fragment).commit();

    // update selected item and title, then close the drawer
    mDrawerList.setItemChecked(position, true);
    mDrawerLayout.closeDrawer(mDrawerList);
}

You could easily replace the Fragments with Activities, and the beginTransation with a startActivity.

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