每个活动的默认导航抽屉

Question

我是安卓开发的新手。我刚刚创建了一个 android 项目

在创建 android 项目时。我选择了活动类型作为导航抽屉（即 .mainactivity）。 现在我遇到新创建的活动不包含该抽屉。但我想在每个活动上显示那个导航抽屉。 这可能吗？

在谷歌搜索中，我找到了一些教程，但这些教程用于自定义导航抽屉。 请问有什么建议吗？因为我不想添加返回按钮以从当前活动返回。我在抽屉菜单中添加了主页按钮。

Answer 1

Try this:-

Create Baseactivty.java and add following code:-



public class BaseActivity extends Activity
{
    public DrawerLayout drawerLayout;
    public ListView drawerList;
    public String[] layers;
    private ActionBarDrawerToggle drawerToggle;
    private Map map;

    protected void onCreate(Bundle savedInstanceState)
    {
        // R.id.drawer_layout should be in every activity with exactly the same id.
        drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

        drawerToggle = new ActionBarDrawerToggle((Activity) this, drawerLayout, R.drawable.ic_drawer, 0, 0) 
        {
            public void onDrawerClosed(View view) 
            {
                getActionBar().setTitle(R.string.app_name);
            }

            public void onDrawerOpened(View drawerView) 
            {
                getActionBar().setTitle(R.string.menu);
            }
        };
        drawerLayout.setDrawerListener(drawerToggle);

        getActionBar().setDisplayHomeAsUpEnabled(true);
        getActionBar().setHomeButtonEnabled(true);

        layers = getResources().getStringArray(R.array.layers_array);
        drawerList = (ListView) findViewById(R.id.left_drawer);
        View header = getLayoutInflater().inflate(R.layout.drawer_list_header, null);
        drawerList.addHeaderView(header, null, false);
        drawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, android.R.id.text1,
                layers));
        View footerView = ((LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(
                R.layout.drawer_list_footer, null, false);
        drawerList.addFooterView(footerView);

        drawerList.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> arg0, View arg1, int pos, long arg3) {
                map.drawerClickEvent(pos);
            }
        });
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        if (drawerToggle.onOptionsItemSelected(item)) {
            return true;
        }
        return super.onOptionsItemSelected(item);

    }

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

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        drawerToggle.onConfigurationChanged(newConfig);
    }
}

将此Baseactivity扩展到您想要navigationdrawer的所有活动

Answer 2

其中一种方法是使用 Navigation Drawer 和 FragmentManager

1.创建MainActivity并将DrawerLayout作为它的main_content作为

<android.support.v4.widget.DrawerLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/drawer_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <!-- The main content view -->
    <FrameLayout
        android:id="@+id/content_frame"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />
    <!-- The navigation drawer -->
    <ListView android:id="@+id/left_drawer"
        android:layout_width="240dp"
        android:layout_height="match_parent"
        android:layout_gravity="start"
        android:choiceMode="singleChoice"
        android:divider="@android:color/transparent"
        android:dividerHeight="0dp"
        android:background="#111"/>
</android.support.v4.widget.DrawerLayout>

1. 初始化抽屉列表

   public class MainActivity extends Activity {
       private String[] mPlanetTitles;
       private DrawerLayout mDrawerLayout;
       private ListView mDrawerList;
   
   
       @Override
       public void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
   
           mPlanetTitles = getResources().getStringArray(R.array.planets_array);
           mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
           mDrawerList = (ListView) findViewById(R.id.left_drawer);
   
           // Set the adapter for the list view
           mDrawerList.setAdapter(new ArrayAdapter<String>(this,
                   R.layout.drawer_list_item, mPlanetTitles));
           // Set the list's click listener
           mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
   
       }
   }
   

2. 处理导航点击事件

   private class DrawerItemClickListener implements ListView.OnItemClickListener {
       @Override
       public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
           selectItem(position);
       }
   }
   
   /** Swaps fragments in the main content view */
   private void selectItem(int position) {
       // Create a new fragment and specify the planet to show based on position
       Fragment fragment = new PlanetFragment();
       Bundle args = new Bundle();
       args.putInt(PlanetFragment.ARG_PLANET_NUMBER, position);
       fragment.setArguments(args);
   
       // Insert the fragment by replacing any existing fragment
       FragmentManager fragmentManager = getFragmentManager();
       fragmentManager.beginTransaction()
                      .replace(R.id.content_frame, fragment)
                      .commit();
   
       // Highlight the selected item, update the title, and close the drawer
       mDrawerList.setItemChecked(position, true);
       setTitle(mPlanetTitles[position]);
       mDrawerLayout.closeDrawer(mDrawerList);
   }
   
   @Override
   public void setTitle(CharSequence title) {
       mTitle = title;
       getActionBar().setTitle(mTitle);
   }
   

4 NavigationDrawer 上的打开和关闭事件

    public class MainActivity extends Activity {
private DrawerLayout mDrawerLayout;
private ActionBarDrawerToggle mDrawerToggle;
private CharSequence mDrawerTitle;
private CharSequence mTitle;
...

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

    mTitle = mDrawerTitle = getTitle();
    mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
    mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
            R.string.drawer_open, R.string.drawer_close) {

        /** Called when a drawer has settled in a completely closed state. */
        public void onDrawerClosed(View view) {
            super.onDrawerClosed(view);
            getActionBar().setTitle(mTitle);
            invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
        }

        /** Called when a drawer has settled in a completely open state. */
        public void onDrawerOpened(View drawerView) {
            super.onDrawerOpened(drawerView);
            getActionBar().setTitle(mDrawerTitle);
            invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
        }
    };

    // Set the drawer toggle as the DrawerListener
    mDrawerLayout.setDrawerListener(mDrawerToggle);
}

/* Called whenever we call invalidateOptionsMenu() */
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    // If the nav drawer is open, hide action items related to the content view
    boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
    menu.findItem(R.id.action_websearch).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}
    }

另一种方法是制作一个 BaseActivity 将 NavigationDrawer 放入 然后它为所有 ChildActivity 扩展 BaseActivity，这样你 可以在整个应用程序中使用相同的导航抽屉。