将（打开/关闭）按钮添加到用于（打开/关闭）导航抽屉的活动

Question

我目前正在从android站点上了解导航抽屉，我正在使用他们的示例http://developer.android.com/training/implementation-navigation/nav-drawer.html

我想要的是在MainActivity中添加一个按钮，它将能够打开NavigationDrawer。我需要以编程方式完成，而不是XML。我怎么能那样做？

Answer 1

在mainactivity中创建一个包含您的DrawerLayout的方法。

public void open()
{
    mDrawerLayout.openDrawer(Gravity.LEFT);
}

并从oncreateView（）方法中的片段中以编程方式在根膨胀布局中添加按钮。您的片段有按钮
bellowi修改的片段尝试

 public static class PlanetFragment extends Fragment {
    public static final String ARG_PLANET_NUMBER = "planet_number";

    public PlanetFragment() {
        // Empty constructor required for fragment subclasses
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_planet, container, false);
        int i = getArguments().getInt(ARG_PLANET_NUMBER);
        String planet = getResources().getStringArray(R.array.planets_array)[i];

        int imageId = getResources().getIdentifier(planet.toLowerCase(Locale.getDefault()),
                        "drawable", getActivity().getPackageName());
        ((ImageView) rootView.findViewById(R.id.image)).setImageResource(imageId);
        getActivity().setTitle(planet);
        RelativeLayout root=(RelativeLayout)rootView.findViewById(R.id.root);
        Button button=new Button(getActivity());            
        LayoutParams params=new LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT);
        button.setLayoutParams(params);
        params.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
        params.addRule(RelativeLayout.ALIGN_PARENT_TOP);
        button.setText("openDrawer");
        root.addView(button);

        button.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                // TODO Auto-generated method stub
                ((MainActivity)getActivity()).open();
            }
        });
        return rootView;
    }
    }
 }

您可以在片段中尝试此代码..