适用于所有活动的Android父级导航抽屉 [英] Android parent Navigation Drawer for all activities

问题描述

我正在创建一个需要针对所有活动使用相同导航抽屉的应用程序.为此，我创建了一个扩展Activity(子类需要)的类，并在其中编写了Navigation Drawer的代码.

I am creating an app which requires same Navigation Drawer for all activities. To do so, I have created a class which extends Activity (need for child classes) and written the code for Navigation Drawer there.

public class NavigationDrawerClass extends Activity {
    String [] names = new String[]{"Rohan", "Muthu","Rishi"};
    private ActionBarDrawerToggle mDrawerToggle;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.navigation_drawer_class);
        DrawerLayout drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

        ListView list = (ListView) findViewById(R.id.left_drawer);
        list.setAdapter(new ArrayAdapter<String>(NavigationDrawerClass.this, android.R.layout.simple_list_item_1, names));
        // enable ActionBar app icon to behave as action to toggle nav drawer
        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setHomeButtonEnabled(true);

        mDrawerToggle = new ActionBarDrawerToggle(
                NavigationDrawerClass.this,                  /* host Activity */
                drawerLayout,         /* DrawerLayout object */
                R.drawable.ic_drawer,  /* nav drawer image to replace 'Up' caret */
                R.string.open_drawer ,  /* "open drawer" description for accessibility */
                R.string.close_drawer  /* "close drawer" description for accessibility */
        ) {
            public void onDrawerClosed(View view) {
                getActionBar().setTitle("Drawer Closed");
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }

            public void onDrawerOpened(View drawerView) {
                getActionBar().setTitle("Drawer Opened");
                invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
            }
        };
        drawerLayout.setDrawerListener(mDrawerToggle);

    }

    @Override
    protected void onPostCreate(Bundle savedInstanceState) {
        super.onPostCreate(savedInstanceState);
        mDrawerToggle.syncState();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        // Pass any configuration change to the drawer toggle
        mDrawerToggle.onConfigurationChanged(newConfig);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // The action bar home/up action should open or close the drawer.
        // ActionBarDrawerToggle will take care of this.
        if (mDrawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void setTitle(CharSequence title) {
        getActionBar().setTitle("Navigation Drawer Example");
    }
}

然后我尝试将其扩展到其他一些类，例如-public class MyActivity extends NavigationDrawerClass，但是导航抽屉不起作用.单击抽屉图标或滑动都没有任何影响.如果我尝试将NavigationDrawerClass作为独立类运行，则它将完美运行.为了使导航抽屉可用于所有课程，我还需要采取哪些其他步骤.

Then I am trying to extend it in some other classes eg-public class MyActivity extends NavigationDrawerClass but the navigation drawer is not working. Neither clicking on the drawer icon or sliding has any affect. If I try to run the NavigationDrawerClass as a stand alone class then it runs perfectly. What additional steps I have to take to make the navigation drawer available for all classes.

推荐答案

每个注释中，在扩展的Activity中，我们只是找到基类的DrawerLayout的内容视图，然后将扩展的Activity的布局扩大到其中.

Per the comments, in the extended Activity, we're simply finding the base class's DrawerLayout's content View, and inflating the extended Activity's layout into it.

public class MyActivity extends NavigationDrawerClass
{
    @Override
    public void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);

        ViewGroup content = (ViewGroup) findViewById(R.id.content_frame);
        getLayoutInflater().inflate(R.layout.my_activity, content, true);   
        ...
    }
}

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