【发布时间】：2015-11-11 05:16:05
【问题描述】：
我在我的安卓应用中添加了新的Toolbar、Tablayout 和Viewpager。我为我的 3 个选项卡提供了 Fragments，并且工作正常。但问题是，当我向上滚动时，我的工具栏并没有隐藏。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
<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，当我向下滚动时，工具栏应该尽快返回。
【问题讨论】：
-
在工具栏中添加 app:layout_scrollFlags="scroll|enterAlways"
-
如果你在片段中使用gridview，那么在gridview中添加android:nestedScrollingEnabled="true"
标签： android android-fragments webview toolbar android-tablayout