Android Navigation Drawer,自定义ActionBar(标题居中)
整个示例都是改造自 Google Android Training 中的 NavigationDrawer 示例(http://developer.android.com/training/implementing-navigation/nav- drawer.html)
因为我需要使用自定义的 ActionBar,而ActionBarDrawerToggle 只能通过 ActionBar 中的 Action Menu 进行触发,且需要提供一个indicator图片,而不支持自定义按钮的触发(如下代码):
public boolean onOptionsItemSelected(MenuItem item) { if (item != null && item.getItemId() == ID_HOME && mDrawerIndicatorEnabled) { if (mDrawerLayout.isDrawerVisible(GravityCompat.START)) { mDrawerLayout.closeDrawer(GravityCompat.START); } else { mDrawerLayout.openDrawer(GravityCompat.START); } return true; } return false; }
因此考虑参考 ActionBarDrawerToggle 重写自己的 MabDrawerToggle,然后去掉 onOptionsItemSelected 方式来触发 drawer,新增了一个 switchDrawer 方法,如下:
public void switchDrawer() { if (mDrawerLayout.isDrawerVisible(GravityCompat.START)) { mDrawerLayout.closeDrawer(GravityCompat.START); } else { mDrawerLayout.openDrawer(GravityCompat.START); } }
下面看一下 ActionBar 自定义 View 中标题居中的问题,折腾了好久,最后采用 FrameLayout 方式解决的,如下 action_bar_title.xml:
<?xml version="1.0" encoding="utf-8"?> <FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="wrap_content"> <TextView android:id="@android:id/title" android:layout_height="match_parent" android:layout_width="match_parent" android:gravity="center" android:text="hello" android:textColor="@android:color/holo_red_light"/> <ImageButton android:id="@+id/left_btn" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_gravity="left|center_vertical" android:layout_marginLeft="12.0dip" android:src="@android:drawable/ic_media_play"/> <ImageButton android:id="@+id/right_btn" android:layout_height="wrap_content" android:layout_width="wrap_content" android:layout_gravity="right|center_vertical" android:layout_marginRight="12.0dip" android:src="@android:drawable/ic_media_pause"/> </FrameLayout>
在 onCreate 中实现如下:
protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mTitle = getTitle(); mPlanetTitles = getResources().getStringArray(R.array.planets_array); mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout); mDrawerList = (ListView) findViewById(R.id.left_drawer); // set a custom shadow that overlays the main content when the drawer opens www.it165.net mDrawerLayout.setDrawerShadow(R.drawable.drawer_shadow, GravityCompat.START); mDrawerList.setAdapter(new ArrayAdapter<String>(this, R.layout.drawer_list_item, mPlanetTitles)); mDrawerList.setOnItemClickListener(new DrawerItemClickListener()); ActionBar.LayoutParams lp = new ActionBar.LayoutParams( ActionBar.LayoutParams.MATCH_PARENT, ActionBar.LayoutParams.MATCH_PARENT, Gravity.CENTER); View viewTitleBar = getLayoutInflater().inflate(R.layout.action_bar_title, null); getActionBar().setCustomView(viewTitleBar, lp); getActionBar().setDisplayShowHomeEnabled(false); getActionBar().setDisplayShowTitleEnabled(false); getActionBar().setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM); getActionBar().setDisplayShowCustomEnabled(true); tvTitle = (TextView) getActionBar().getCustomView().findViewById(android.R.id.title); ImageButton ibtnNav = (ImageButton) getActionBar().getCustomView().findViewById(R.id.left_btn); ibtnNav.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mDrawerToggle.switchDrawer(); } }); // MabDrawerToggle ties together the the proper interactions // between the sliding drawer and the action bar app icon mDrawerToggle = new MabDrawerToggle( this, /* host Activity */ mDrawerLayout, /* DrawerLayout object */ R.drawable.ic_drawer, /* nav drawer image to replace ‘Up‘ caret */ R.string.drawer_open, /* "open drawer" description for accessibility */ R.string.drawer_close /* "close drawer" description for accessibility */ ); mDrawerLayout.setDrawerListener(mDrawerToggle); if (savedInstanceState == null) { selectItem(0); } }
下面为两张运行效果图:
选择 Navigation 列表中的项后,切换 Fragment 以及 标题:
郑重声明:本站内容如果来自互联网及其他传播媒体,其版权均属原媒体及文章作者所有。转载目的在于传递更多信息及用于网络分享,并不代表本站赞同其观点和对其真实性负责,也不构成任何其他建议。