所有活动的Android父导航抽屉

Question

我正在创建一个应用程序，它要求所有活动都使用相同的导航抽屉。为此，我创建了一个扩展 Activity 的类（需要子类）并在那里编写 Navigation Drawer 的代码。

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");
    }
}

然后我尝试在其他一些类中扩展它，例如-public class MyActivity extends NavigationDrawerClass，但导航抽屉不起作用。点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，那么它运行完美。我必须采取哪些额外步骤才能使导航抽屉可用于所有类。

Answer 1

根据 cmets，在扩展的 Activity 中，我们只是找到基类的 DrawerLayout 的内容视图，并将扩展的 Activity 的布局膨胀到其中。

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);   
        ...
    }
}

Answer 2

您可以在活动中使用片段。这是更好的解决方案。

但是如果你想扩展这个活动，你应该在调用 super.onCreate() 方法之前设置布局。并且在您的布局中为每个扩展活动添加导航抽屉。

让示例： 在 NavigationDrawerClass 添加方法 getLayout() 并调用 onCreate()

public class NavigationDrawerClass extend Activity {
      public void onCreate(Bundle saveInstanceState) {
              super.onCreate(savedInstanceState);
              setContentView(getLayout());
              // your code here
      }

      protected int getLayout() {
             return R.layout.navigation_drawer_class;
      }
}

在子活动中使用这样的代码

public class YourActivity extends NavigationDrawerClass{
    public void onCreate(Bundle saveInstanceState) {
         super.onCreate();
         // here do not call setContentView() method
         // all your other code
    }
    @Override
    protected int getLayout() {
         return R.layout.your_activity_xml_layout;
    }
}

Answer 3

@MikeM 解决方案的一个更简洁的解决方案是在基类上覆盖 setContentView 并在那里完成技巧：

@Override
public void setContentView(int layoutResID)
{
    super.setContentView(R.layout.navigation_drawer_class);

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

然后，在扩展的活动上，只需正常调用setContentView：

setContentView(R.layout.other_class);

编辑： 此外，在基类上，有必要在onPostCreate 方法而不是onCreate 上进行抽屉、抽屉切换等的初始化，以避免调用setContentView 两次（在基类onCreate 和在扩展类onCreate):

@Override
protected void onPostCreate(Bundle savedInstanceState)
    super.onPostCreate(savedInstanceState);

    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);
}

Answer 4

这对我有用

public class MyDrawer extends AppCompatActivity {
ActionBarDrawerToggle toggle;
protected RelativeLayout fullLayout;
protected FrameLayout frameLayout;
@Override
public void setContentView(final int layoutResID) {
    fullLayout = (RelativeLayout) getLayoutInflater().inflate(R.layout.mydrawer, null);
    frameLayout = (FrameLayout) fullLayout.findViewById(R.id.drawer_frame);
    getLayoutInflater().inflate(layoutResID, frameLayout, true);
    super.setContentView(fullLayout);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    //setSupportActionBar(toolbar);
    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
    getSupportActionBar().setHomeButtonEnabled(true);
    final DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout3);
    toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();
    final NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(MenuItem menuItem) {
            drawer.closeDrawers();
            int itemId = menuItem.getItemId();
            Toast.makeText(getApplicationContext(), menuItem.getTitle().toString(),
                    Toast.LENGTH_LONG).show();
            //navigationView.getMenu().findItem(R.id.drawer_5_reasons).setChecked(true);
            return true;
        }
    });
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
    if (toggle.onOptionsItemSelected(item))
    {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

}

xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="0dp"
android:layout_height="0dp"
android:id="@+id/drawer_framelayout">
<FrameLayout
    android:id="@+id/drawer_frame2"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    />
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout3"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
tools:openDrawer="start"
>
<FrameLayout
    android:id="@+id/drawer_frame"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    />
<android.support.design.widget.NavigationView android:id="@+id/nav_view"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_gravity="start"
android:fitsSystemWindows="true"
app:headerLayout="@layout/nav_header_main2"
app:menu="@menu/activity_main_drawer"
android:background="#fefefd" />
</android.support.v4.widget.DrawerLayout>
</RelativeLayout>

使用：

public class yourclass extends MyDrawer {

主要问题.setOnItemClickListener

<android.support.v4.widget.DrawerLayout>
<FrameLayout>
    your main content stuff here
</android.support.v4.widget.DrawerLayout>
<FrameLayout>
    your main content stuff here(.setOnItemClickListener)