我在我的Android应用中添加了新的Toolbar，Tablayout和Viewpager。我为我的3个标签提供了碎片，它的工作正常。但问题是，当我向上滚动我的工具栏时，不会隐藏。我希望当我滚动我的片段时它应该隐藏。还有一件事，我在片段中使用Webview。
我的代码如下。
MainActivity.Java
public class MainActivity extends AppCompatActivity {
TabLayout tabLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setupToolbar();
setupTablayout();
}
private void setupToolbar() {
// TODO Auto-generated method stub
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbarsdfs);
if (toolbar != null) {
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);}
}
private void setupTablayout() {
// TODO Auto-generated method stub
tabLayout = (TabLayout) findViewById(R.id.tabLayout);
tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);
tabLayout.addTab(tabLayout.newTab().setText("Tab 1"));
tabLayout.addTab(tabLayout.newTab().setText("Tab 2"));
final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);
final PagerAdapter adapter = new PagerAdapter
(getSupportFragmentManager(), tabLayout.getTabCount());
viewPager.setAdapter(adapter);
viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));
tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
@Override
public void onTabSelected(TabLayout.Tab tab) {
viewPager.setCurrentItem(tab.getPosition());
}
@Override
public void onTabUnselected(TabLayout.Tab tab) {
}
@Override
public void onTabReselected(TabLayout.Tab tab) {
}
});
}
}
main.xml中
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/coordinatorLayout"
android:layout_height="match_parent"
android:layout_width="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<android.support.v7.widget.Toolbar
android:id="@+id/toolbarsdfs"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:minHeight="?attr/actionBarSize"
android:background="?attr/colorPrimaryDark"
android:theme="@style/ThemeOverlay.AppCompat.ActionBar"
app:layout_scrollFlags="scroll|enterAlways"/>
<android.support.design.widget.TabLayout
android:id="@+id/tabLayout"
android:scrollbars="horizontal"
android:layout_below="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="?attr/colorPrimary" />
<android.support.v4.view.ViewPager
android:id="@+id/pager"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:layout_below="@+id/tablayout"/>
</android.support.design.widget.AppBarLayout>
</android.support.design.widget.CoordinatorLayout>
PagerAdapter.Java
public class PagerAdapter extends FragmentStatePagerAdapter {
int mNumOfTabs;
public PagerAdapter(FragmentManager fm, int NumOfTabs) {
super(fm);
this.mNumOfTabs = NumOfTabs;
}
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
Fragment_Feeds tab1 = new Fragment_Feeds();
return tab1;
case 1:
Fragment_Facts tab2 = new Fragment_Facts();
return tab2;
default:
return null;
}
}
@Override
public int getCount() {
return mNumOfTabs;
}
}
Fragment_Feeds.java
public class Fragment_Feeds extends Fragment {
SwipeRefreshLayout swipeView;
WebView myWebView;
ProgressBar progressBar;
final static String myBlogAddr = "http://myblog.com";
String myUrl;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragmentfeeds, container, false);
swipeView = (SwipeRefreshLayout) view.findViewById(R.id.swipe);
myWebView = (WebView) view.findViewById(R.id.webview);
progressBar = (ProgressBar) view.findViewById(R.id.progressBar);
myWebView.setWebViewClient(new MyWebViewClient());
WebSettings webSettings = myWebView.getSettings();
webSettings.setJavaScriptEnabled(true);
myWebView.setOverScrollMode(View.OVER_SCROLL_NEVER);
myWebView.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY);
myWebView.setHorizontalScrollBarEnabled(false);
myWebView.loadUrl("http://myblog.com");
swipeView.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener()
{
@Override
public void onRefresh()
{
myWebView.loadUrl("http://myblog.com");
}});
return view;
}
private class MyWebViewClient extends WebViewClient {
@Override
public void onPageFinished(WebView view, String url) {
swipeView.setRefreshing(false);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
myUrl = url;
view.loadUrl(url);
return true;
}
@Override
public void onReceivedError(WebView view, int errorCod,String description, String failingUrl) {
myWebView.loadUrl("file:///android_asset/error_page.html");
}
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.main, menu);
super.onCreateOptionsMenu(menu, inflater);
}
}
fragmentfeeds.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#FFFFFF" >
<ProgressBar
android:id="@+id/progressBar"
style="?android:attr/progressBarStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<android.support.v4.widget.SwipeRefreshLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/swipe"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF">s
<WebView
android:id="@+id/webview"
android:layout_width="match_parent"
android:layout_height="fill_parent"
android:numColumns="1"
android:scrollbars="none"
android:focusableInTouchMode="false"
android:focusable="false"
android:background="#FFFFFF" />
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
我想要什么？
我想要的是，当我向上滚动webview时，工具栏也应该向上滚动并隐藏，当我向下滚动工具栏时，应该尽快回来。
答案 0 :(得分：5)
首先，您应该将您的webview移动到NestedScrollView并设置＆＃39; android：isScrollContainer＆＃39;属于＆＃39; false＆＃39;值。 https://developer.android.com/reference/android/support/v4/widget/NestedScrollView.html
其次，您应该将ViewPager移到AppBarLayout之外。 所以，你的main.xml应该是这样的：
<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/main_content"
android:background="#FFF"
android:clickable="true"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:id="@+id/appbar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
<!-- your app bar stuff here -->
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="240dp"
app:layout_scrollFlags="scroll|enterAlways">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="fitXY"
android:id="@+id/image_header"/>
<include layout="@layout/header"/>
</FrameLayout>
<android.support.design.widget.TabLayout
android:id="@+id/tabs"
android:background="#FFF"
app:tabTextColor="#a3a3a3"
app:tabSelectedTextColor="#a3a3a3"
app:tabIndicatorColor="#0042ab"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
</android.support.design.widget.AppBarLayout>
<android.support.v4.view.ViewPager
android:id="@+id/viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
android:background="#eaeaea"/>
AppBarLayout childern只有在有标志app时才会隐藏：layout_scrollFlags
在此处阅读有关实施支持设计库的更多信息：
https://android-developers.googleblog.com/2015/05/android-design-support-library.html
答案 1 :(得分：3)
您应该将ViewPager移到AppBarLayout之外，并将行为添加到ViewPager app:layout_behavior="@string/appbar_scrolling_view_behavior"
我写了一个完整的例子！ https://github.com/erikcaffrey/AndroidDesignSupportLibrary
希望对你有帮助！
答案 2 :(得分：1)
只需在工具栏或FAB按钮中添加此行。
class Bullets(pygame.sprite.Sprite):
def __init__(self,x,y):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("Images/bullet.png")
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
def update(self):
self.rect.y += 4
if self.rect.y > 520:
BulletList.empty()
def main3():
moveX = 0
TrapList.empty()
player.rect.x,player.rect.y = 50,0
BulletList.add(bullet)
FiringBullet = pygame.USEREVENT + 1
pygame.time.set_timer(FiringBullet, 3000)
GameExit = False
while GameExit==False:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
player.move(-player.speed,0)
if event.key == pygame.K_RIGHT:
player.move(player.speed,0)
if event.key == pygame.K_UP:
player.move(0,-10)
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
player.move(player.speed,0)
if event.key == pygame.K_RIGHT:
player.move(-player.speed,0)
if event.key == pygame.K_UP:
player.move(0,0)
if event.type == FiringBullet:
BulletList.add(bullet)
print(BulletList)
screen.fill(BLACK)
level3.update()
if player.rect.x > 350:
for eachbullet in BulletList:
BulletList.draw(screen)
BulletList.update()
playergroup.update()
playergroup.draw(screen)
player.Level3PlatColl(BlockListDirt2)
pygame.display.update()
clock.tick(60)
bullet = Bullets(400,200)
BulletList = pygame.sprite.Group()
main3()
当用户向下滚动列表时，app:layout_scrollFlags="scroll|enterAlways"
行将导致我们app:layout_scrollFlags="scroll|enterAlways"将滚动屏幕，一旦他开始向上滚动，Toolbar将再次显示。干净简单，这是Toolbar的力量！
答案 3 :(得分：0)
隐藏特定片段的菜单：
compile 'com.parse:parse-android:1.12答案 4 :(得分：0)
只需将app:layout_scrollFlags="scroll|enterAlways"放到工具栏即可。