我遇到了Android的新材料设计支持库的这个所谓的Collapsing Toolbar,我正在考虑将这个新设计应用到我的一些片段中。
所以我也碰巧到达了这个第三方库Material View Pager,它与Collapsing Toolbar
非常相似,只不过它有一个内置的View Pager
。我想将它集成到我的应用程序中,因为它的功能非常适合某个片段。由于它与Collapsing Toolbar
类似,因此它提供了自己的Toolbar
,需要通过setSupportActionBar()
进行设置。
接下来,从下面的代码开始,我有一个Navigation Drawer
负责导航我的五个片段之间的导航(COR,班级时间表,评估,INC监视器和清除)
现在,我想将此Collapsing Toolbar
应用于我的两个片段(COR& Clearance),并将此Material View Pager
应用于一个片段(评估)。问题是,我已经为我的所有片段设置了标准Toolbar
:
<android.support.v7.widget.Toolbar
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:popupTheme="@style/ThemeOverlay.AppCompat.Light"
app:theme="@style/ActionBarPopupThemeOverlay"
app:menu="@menu/menu_toolbar"
android:id="@+id/toolbar"
android:background="@color/primary_dark"
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:minHeight="?attr/actionBarSize"
android:elevation= "4dp" />
public void setupToolbar() {
toolbar = (Toolbar) findViewById(R.id.toolbar);
if (toolbar != null) {
setSupportActionBar(toolbar);
}
}
public void setupNavigationDrawer() {
drawer_layout = (DrawerLayout) findViewById(R.id.drawer_layout);
navigation_view = (NavigationView) findViewById(R.id.navigation_view);
navigation_view.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
fragment_manager = getSupportFragmentManager();
fragment_transaction = fragment_manager.beginTransaction();
fragment_transaction.setCustomAnimations(R.anim.fade_in, R.anim.fade_out);
menuItem.setChecked(true);
switch (menuItem.getItemId()) {
case R.id.cor: //Collapsing Toolbar here
fragment_transaction.replace(R.id.content, cor_fragment);
break;
case R.id.sched: //Normal Toolbar here
fragment_transaction.replace(R.id.content, sched_fragment);
break;
case R.id.eval: //Material View Pager Toolbar here
fragment_transaction.replace(R.id.content, eval_fragment);
break;
case R.id.inc: //Normal Toolbar here
fragment_transaction.replace(R.id.content, inc_fragment);
break;
case R.id.clear: //Collapsing Toolbar here
fragment_transaction.replace(R.id.content, clear_fragment);
break;
}
mHandler = new Handler();
mHandler.removeCallbacksAndMessages(null);
int delay = 400;
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
fragment_transaction.addToBackStack(null);
fragment_transaction.commit();
}
}, delay);
drawer_layout.closeDrawers();
return true;
}
});
drawer_toggle = new ActionBarDrawerToggle(this, drawer_layout, toolbar, R.string.open_drawer, R.string.close_drawer) {
@Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
}
@Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
}
};
drawer_layout.setDrawerListener(drawer_toggle);
drawer_toggle.syncState();
drawer_layout.openDrawer(GravityCompat.START);
}
从上面的注释中可以看出,对于每个正在加载的片段,我想加载一个不同的工具栏。但在我写的代码中,我只能setSupportActionBar()
一个Toolbar
。我尝试在setSupportActionBar(toolbar_of_choice)
语句的每个case
中添加switch
,但它会崩溃该应用。
为Navigation Drawer
中的每个片段设置不同的工具栏是否有任何变通方法?
答案 0 :(得分:0)
@Override
public boolean onNavigationItemSelected(MenuItem menuItem) {
fragment_manager = getSupportFragmentManager();
fragment_transaction = fragment_manager.beginTransaction();
fragment_transaction.setCustomAnimations(R.anim.fade_in, R.anim.fade_out);
menuItem.setChecked(true);
switch (menuItem.getItemId()) {
case R.id.cor: //Collapsing Toolbar here
fragment_transaction.replace(R.id.content, cor_fragment);
Toolbar toolbar =(Toolbar)findViewById(R.id.toolbar);
toolbar.setVisibility(View.GONE);
// use can replace original toolbar with collapsing//
break;
case R.id.sched: //Normal Toolbar here
fragment_transaction.replace(R.id.content, sched_fragment);
Toolbar toolbar =(Toolbar)findViewById(R.id.toolbarmain);
toolbar.setVisibility(View.VISIBLE);
break;
case R.id.eval: //Material View Pager Toolbar here
fragment_transaction.replace(R.id.content, eval_fragment);
break;
case R.id.inc: //Normal Toolbar here
fragment_transaction.replace(R.id.content, inc_fragment);
Toolbar toolbar =(Toolbar)findViewById(R.id.toolbarmain);
toolbar.setVisibility(View.VISIBLE);
break;
case R.id.clear: //Collapsing Toolbar here
fragment_transaction.replace(R.id.content, clear_fragment);
break;
}
使用上面的代码,您可以轻松利用折叠布局。