我的应用使用actionbarsherlock的导航抽屉。我想在片段中使用这样的动作项:
public class StartFragment extends SherlockFragment {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_start, container,
false);
setHasOptionsMenu(true);
return rootView;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.start, menu);
}
// Handle context menu events
public boolean onOptionsItemSelected(MenuItem menuItem) {
switch (menuItem.getItemId()) {
case R.id.backup:
Log.i(TAG, "Backup clicked");
break;
case R.id.settings:
Log.i(TAG, "Settings clicked");
}
return (super.onOptionsItemSelected(menuItem));
}
}
问题是,日志输出不触发当我点击图标,但只有当我打开导航抽屉。
下面是主要活动:
import android.content.res.Configuration;
import android.os.Bundle;
import android.support.v4.app.ActionBarDrawerToggle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListView;
import android.widget.RelativeLayout;
import com.actionbarsherlock.app.SherlockFragmentActivity;
import com.actionbarsherlock.view.MenuItem;
import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;
import xyz.StartFragment;
public class MainActivity extends SherlockFragmentActivity {
// Variables
DrawerLayout mDrawerLayout;
ListView mDrawerList;
ActionBarDrawerToggle mDrawerToggle;
MenuListAdapter mMenuAdapter;
String[] title;
String[] subtitle;
int[] icon;
Fragment fragment1 = new StartFragment();
private CharSequence mDrawerTitle;
private CharSequence mTitle;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.drawer_main);
// Get the title
mTitle = mDrawerTitle = getTitle();
// Generate title
title = getResources().getStringArray(R.array.actionbar_menu);
// Generate icon
icon = new int[] { R.drawable.home, R.drawable.mozart,
R.drawable.action_settings, R.drawable.action_settings,
R.drawable.action_settings, R.drawable.collections_cloud };
// Locate DrawerLayout in drawer_main.xml
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout);
// Locate ListView in drawer_main.xml
mDrawerList = (ListView) findViewById(R.id.listview_drawer);
// Set a custom shadow that overlays the main content when the drawer
// opens
mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow,
GravityCompat.START);
// Pass string arrays to MenuListAdapter
mMenuAdapter = new MenuListAdapter(MainActivity.this, title, icon);
// Set the MenuListAdapter to the ListView
mDrawerList.setAdapter(mMenuAdapter);
// Capture listview menu item click
mDrawerList.setOnItemClickListener(new DrawerItemClickListener());
// Enable ActionBar app icon to behave as action to toggle nav drawer
getSupportActionBar().setHomeButtonEnabled(true);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
// ActionBarDrawerToggle ties together the the proper interactions
// between the sliding drawer and the action bar app icon
mDrawerToggle = new ActionBarDrawerToggle(this, mDrawerLayout,
R.drawable.ic_drawer, R.string.drawer_open,
R.string.drawer_close) {
public void onDrawerClosed(View view) {
// TODO Auto-generated method stub
super.onDrawerClosed(view);
}
public void onDrawerOpened(View drawerView) {
// TODO Auto-generated method stub
// Set the title on the action when drawer open
getSupportActionBar().setTitle(mDrawerTitle);
super.onDrawerOpened(drawerView);
}
};
mDrawerLayout.setDrawerListener(mDrawerToggle);
if (savedInstanceState == null) {
selectItem(0);
}
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
mDrawerLayout.closeDrawer(mDrawerList);
} else {
mDrawerLayout.openDrawer(mDrawerList);
}
}
return super.onOptionsItemSelected(item);
}
// ListView click listener in the navigation drawer
private class DrawerItemClickListener implements
ListView.OnItemClickListener {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position,
long id) {
selectItem(position);
}
}
private void selectItem(int position) {
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
// Locate Position
switch (position) {
case 0:
ft.replace(R.id.content_frame, fragment1);
break;
case 1:
ft.replace(R.id.content_frame, fragment2);
break;
case 2:
ft.replace(R.id.content_frame, fragment3);
break;
}
ft.commit();
mDrawerList.setItemChecked(position, true);
// Get the title followed by the position
setTitle(title[position]);
// Close drawer
mDrawerLayout.closeDrawer(mDrawerList);
}
@Override
protected void onPostCreate(Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
// Sync the toggle state after onRestoreInstanceState has occurred.
mDrawerToggle.syncState();
}
@Override
public void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
// Pass any configuration change to the drawer toggles
mDrawerToggle.onConfigurationChanged(newConfig);
}
@Override
public void setTitle(CharSequence title) {
mTitle = title;
getSupportActionBar().setTitle(mTitle);
}
}
什么线索吗?
根据文档,您需要在片段的onCreate
中调用setHasOptionsMenu()
,因此尝试将其添加到您的片段代码中:
public void onCreate (Bundle savedInstanceState){
super.onCreate(savedInstanceState);
setHasOptionsMenu(true);
}
请注意文档告诉您在onCreate
中使用setHasOptionsMenu
。你在onCreateView
编辑
也从这里的文档。onCreateOptionsMenu
不调用超级方法,它只是创建菜单并返回true:
@Override
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getMenuInflater();
inflater.inflate(R.menu.game_menu, menu);
return true;
}
所以你可能需要在调用super-method之前膨胀它,或者根本不调用它。
Edit2
我想actionbarsherlock应该是这样的:
public boolean onCreateOptionsMenu(Menu menu) {
MenuInflater inflater = getSherlockActivity().getSupportMenuInflater();
inflater.inflate(R.menu.start, menu);
return true;
}
但是,图标根本不显示
Edit3
对不起,我的编辑不够清楚。您在这里看到的代码来自Activity。对于碎片,它看起来有点不同。所以从更多的研究中,我找到了这个给出工作代码的答案。这支持了我在编辑中的想法:您必须在扩展布局后调用super-method。在你的情况下,你的代码片段必须看起来像这样:
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.start, menu);
super.onCreateOptionsMenu(menu, inflater);
}
我相信'backup'按钮属于活动,而不是片段,这就是为什么你没有得到回调在你的片段的onOptionsItemSelected方法。
如果你想执行代码片段当这个按钮被按下时,你可以简单地添加一个方法到你的片段,并从活动的onOptionsItemSelected:
活动:@Override
public boolean onOptionsItemSelected(MenuItem item) {
if (item.getItemId() == android.R.id.home) {
fragment1.onUp();
if (mDrawerLayout.isDrawerOpen(mDrawerList)) {
mDrawerLayout.closeDrawer(mDrawerList);
} else {
mDrawerLayout.openDrawer(mDrawerList);
}
}
片段:
public void onUp() {
Log.d("backup clicked");
}
我自己也遇到了这个问题。活动的onoptionsitemselected方法不正确。我在关于处理操作项上的单击的部分的文档中找到了解决方案:http://developer.android.com/guide/topics/ui/actionbar.html#ActionItems
我根据文档实现了这个方法,一切都很好。