导航抽屉，用于在活动之间切换

Question

我浏览了一下网站，我找不到我的问题的答案，我试图让我的导航抽屉在活动之间切换，而不是碎片。我尝试了开关语句，所有做的就是崩溃的应用程序，我不知道如何获得抽屉的独立元素，以便设置它们，如果一个被按下，它将转到这个页面，如果另一个被按下它会转到这个页面等。

这是我的密码，

package com.example.ColeraineTown;

imports...

public class HomeScreen extends Activity {

private String[] drawerListViewItems;
private DrawerLayout drawerLayout;
private ListView drawerListView;
private ActionBarDrawerToggle actionBarDrawerToggle;

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

    // get list items from strings.xml
    drawerListViewItems = getResources().getStringArray(R.array.items);
    // get ListView defined in activity_main.xml
    drawerListView = (ListView) findViewById(R.id.left_drawer);

    // Set the adapter for the list view
    drawerListView.setAdapter(new ArrayAdapter<String>(this,
            R.layout.drawer_listview_item, drawerListViewItems));

    // 2. App Icon
    drawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);

    // 2.1 create ActionBarDrawerToggle
    actionBarDrawerToggle = new ActionBarDrawerToggle(
            this,                  /* host Activity */
            drawerLayout,         /* DrawerLayout object */
            R.drawable.ic_drawer,  /* nav drawer icon to replace 'Up' caret */
            R.string.drawer_open,  /* "open drawer" description */
            R.string.drawer_close  /* "close drawer" description */
    );

    // 2.2 Set actionBarDrawerToggle as the DrawerListener
    drawerLayout.setDrawerListener(actionBarDrawerToggle);

    // 2.3 enable and show "up" arrow
    getActionBar().setDisplayHomeAsUpEnabled(true);

    drawerListView.setOnItemClickListener(new DrawerItemClickListener());
}

@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    // Sync the toggle state after onRestoreInstanceState has occurred.
    actionBarDrawerToggle.syncState();
}

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

@Override
public boolean onOptionsItemSelected(MenuItem item) {

    // call ActionBarDrawerToggle.onOptionsItemSelected(), if it returns true
    // then it has handled the app icon touch event

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

private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView parent, View view, int position, long id) {

        drawerLayout.closeDrawer(drawerListView);

    }
}

}

我一整天都在做这件事，试图修复它，让它工作起来，但运气不好。我花了很长时间才把真正的抽屉打开，但看到它全部消失，我会感到很遗憾。

如果你们有能够在活动之间切换的答案，那就太好了！

Answer 1

假设您有5个项目（从0个索引到4个），每个索引标识项目的一个活动。您可以创建一个方法selectItem（int位置）来知道用户选择了哪个抽屉项目。

public void selectItem(int position) {
    Intent intent = null;
    switch(position) {
        case 0:
            intent = new Intent(this, Activity_0.class);
            break;
        case 1:
            intent = new Intent(this, Activity_1.class);
            break;

        ...


        case 4: 
            intent = new Intent(this, Activity_4.class);
            break;

        default : 
            intent = new Intent(this, Activity_0.class); // Activity_0 as default
            break;
    }

    startActivity(intent);
}

最后，将此方法添加到您的DrawerItemClickListener：

private class DrawerItemClickListener implements ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView parent, View view, int position, long id) {
        selectItem(position);
        drawerLayout.closeDrawer(drawerListView);

    }
}

我认为这比使用片段s更容易！！！