通过活动实现的Android导航抽屉

Question

我正在开发自己的Android应用程序,我发现我有三个不同的活动,比如活动A,活动B和活动C.我现在要做的是创建一个导航抽屉以在它们之间导航.我在Android开发者网站上阅读了该教程,但他们只关注片段.专业的Android应用程序如何仅使用一个Activity开发,所有其他屏幕都是使用Fragments开发的？如果没有记录,为什么没有记录如何使用Activities实现正确的导航抽屉呢？感谢您的帮助.

Answer 1

你需要创建一个Base activity可以完成所有常见工作的Drawer navigation东西.我将这个基地Activity称为DrawerActivity,所有其他人Activity应该扩展这个DrawerActivity.所以所有人Activity都会有一个实例Drawer Layout.

创建一个公共布局,DrawerLayout并将一个FrameLayout和ListView作为子项放置

  <android.support.v4.widget.DrawerLayout>
   <FrameLayout
    android:id="@+id/activity_frame”/>
   <ListView
    android:id="@+id/left_drawer”/>
 </android.support.v4.widget.DrawerLayout>

现在将此布局设置为onCreate()onDrawerActivity

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_drawer_layout);
   // do other stuff to initialize drawer layout, add list items
  ……… 
   ……….
  // add a listener to the drawer list view 
 mLeftDrawerList.setOnItemClickListener(new DrawerItemClickListener());

}

添加项目单击侦听器

  private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
        switch (position) {
            case 0: {
                Intent intent = new Intent(DrawerActivity.this, YourActivity.class);
                startActivity(intent);
                break;
            }
            default:
                break;
        }
        mDrawerLayout.closeDrawer(mLeftDrawerList);
    }
}

最后,所有其他活动将扩展这一点 DrawerActivity

 public class MainActivity extends DrawerActivity {

   @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
   // don’t set any content view here, since its already set in DrawerActivity
   FrameLayout frameLayout = (FrameLayout)findViewById(R.id.activity_frame);
    // inflate the custom activity layout
    LayoutInflater layoutInflater = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    View activityView = layoutInflater.inflate(R.layout.activity_main, null,false);
    // add the custom layout of this activity to frame layout.
    frameLayout.addView(activityView);
    // now you can do all your other stuffs
    }
 }

你可以在这里看到完整的来源https://gist.github.com/libinbensin/613dea436302d3015563