【发布时间】：2018-10-23 05:16:00
【问题描述】：
我在这里阅读了很多答案，但无法做到。我希望我所有的活动都有一个抽屉。在抽屉里面我有一个ListView，它包含了抽屉应该打开的所有活动。这是抽屉的实现：
public abstract class DrawerActivity extends BaseActivity {
private DrawerLayout drawerLayout;
private ListView drawerList;
private ActionBarDrawerToggle drawerToggle;
@Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.base_drawer_layout);
drawerLayout = findViewById(R.id.drawer_layout);
drawerList = findViewById(R.id.left_drawer);
final ArrayList<String> elements = new ArrayList<>();
elements.add("My tasks");
elements.add("Issues");
drawerList.setAdapter(new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, elements));
drawerList.setOnItemClickListener(createOnDrawerItemClickListener());
// enable ActionBar app icon to behave as action to toggle nav drawer
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the sliding drawer and the action bar app icon
drawerToggle = new ActionBarDrawerToggle(
this, /* host Activity */
drawerLayout, /* DrawerLayout object */
R.string.drawer_open, /* "open drawer" description for accessibility */
R.string.drawer_close /* "close drawer" description for accessibility */
) {
public void onDrawerClosed(View view)
{
getSupportActionBar().setTitle("TITLE");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
public void onDrawerOpened(View drawerView)
{
getSupportActionBar().setTitle("Title");
invalidateOptionsMenu(); // creates call to onPrepareOptionsMenu()
}
};
drawerLayout.addDrawerListener(drawerToggle);
}
/**
* When using the ActionBarDrawerToggle, you must call it during
* onPostCreate() and onConfigurationChanged()...
*/
@Override
protected void onPostCreate(Bundle savedInstanceState)
{
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
drawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig)
{
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
drawerToggle.onConfigurationChanged(newConfig);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
if (drawerToggle.onOptionsItemSelected(item))
return true;
return super.onOptionsItemSelected(item);
}
protected abstract DrawerItemClickListener createOnDrawerItemClickListener();
protected ListView drawerList()
{
return drawerList;
}
protected DrawerLayout drawerLayout()
{
return drawerLayout;
}
}
这是抽屉布局xml文件
<?xml version="1.0" encoding="utf-8"?>
<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="#274"/>
</android.support.v4.widget.DrawerLayout>
假设我目前有两个活动，我的任务和问题，它们都扩展了DrawerActivity。如果我在问题活动中，如何通过该抽屉打开我的任务活动？
所有扩展 DrawerActivity 的活动都实现了 createOnDrawerItemClickListener()，它在内部创建了一个带有实现 DrawerActivity 的活动的布局的新片段，我很确定这是错误的。
示例实现：
@Override
protected DrawerItemClickListener createOnDrawerItemClickListener()
{
return new DrawerItemClickListener(position ->
{
FragmentManager fragmentManager = getFragmentManager();
fragmentManager.beginTransaction().replace(R.id.content_frame, new TaskFragment()).commit();
drawerList().setItemChecked(position, true);
drawerLayout().closeDrawer(drawerList());
});
}
还有 DrawerItemClickListener：
public class DrawerItemClickListener implements ListView.OnItemClickListener {
private FragmentStrategy fragmentStrategy;
public DrawerItemClickListener(final FragmentStrategy fragmentStrategy)
{
this.fragmentStrategy = fragmentStrategy;
}
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id)
{
fragmentStrategy.showFragment(position);
}
public interface FragmentStrategy {
void showFragment(final int position);
}
}
我怎样才能做到这一点？
【问题讨论】：
-
如果您希望所有屏幕都有抽屉，最好的方法是在单个活动中使用片段，而不是在所有活动中设置抽屉。将您的活动转换为片段需要 5 分钟。
-
我对Android不是很熟悉，我该怎么做？
-
你想告诉我将活动转换为片段还是在活动中添加片段的方法？
标签： java android listview android-activity