簡體   English   中英

滾動選項卡中的片段時隱藏/顯示工具欄

[英]Hiding/Showing the toolbar when fragment in the tabs is scrolled

我在我的 android 應用程序中添加了新的ToolbarTablayoutViewpager 我為我的 3 個標簽提供了 Fragments 並且它工作正常。 但問題是當我向上滾動時,我的工具欄沒有隱藏。 我希望當我滾動我的片段時它應該隱藏。 還有一件事,我在片段中使用 Webview。 我的代碼如下。

主Activity.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) {

        }
    });
}
}

主文件

<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>

尋呼機適配器

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);
    }
}

片段feeds.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>

我想要的是?

我想要的是,當我向上滾動 webview 時,工具欄也應該向上滾動並隱藏,當我向下滾動時,工具欄應該盡快回來。

嘗試這個。

主文件

<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:fitsSystemWindows="true">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbarsdfs"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:background="?attr/colorPrimary"
            app:layout_scrollFlags="scroll|enterAlways"/>

        <android.support.design.widget.TabLayout
            android:id="@+id/tabLayout"
            android:scrollbars="horizontal"
            android:layout_below="@+id/toolbarsdfs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="?attr/colorPrimary"
            app:tabTextColor="@android:color/white"
            app:tabSelectedTextColor="@android:color/white"
            app:tabIndicatorColor="@android:color/white"
            app:tabIndicatorHeight="3dp" />

    </android.support.design.widget.AppBarLayout>
    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="fill_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"
        android:layout_below="@+id/tablayout"/>
    </android.support.design.widget.CoordinatorLayout>

片段feeds.xml

    <?xml version="1.0" encoding="utf-8"?>
    <android.support.v4.widget.NestedScrollView
            xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:app="http://schemas.android.com/apk/res-auto"
            android:isScrollContainer="false"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_gravity="fill_vertical"
            android:clipToPadding="false"
            app:layout_behavior="@string/appbar_scrolling_view_behavior">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical">

    <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">     

    <WebView
             android:id="@+id/webviewtool"
             android:layout_width="match_parent"
             android:layout_height="fill_parent"
             android:numColumns="1"
             android:focusableInTouchMode="false"
             android:focusable="false"
             android:background="#FFFFFF" />
</android.support.v4.widget.SwipeRefreshLayout>
             </LinearLayout>
    </android.support.v4.widget.NestedScrollView>

首先,您應該將 webview 移動到 NestedScrollView 並將 'android:isScrollContainer' 屬性設置為 'false' 值。 https://developer.android.com/reference/android/support/v4/widget/NestedScrollView.html

其次,您應該將 ViewPager 移到 AppBarLayout 之外。 所以,你的 main.xml 應該是這樣的:

<?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 只有當他們有標志 app:layout_scrollFlags 時才會隱藏

在此處閱讀有關實施支持設計庫的更多信息:
https://android-developers.googleblog.com/2015/05/android-design-support-library.html

您應該將 ViewPager 移出 AppBarLayout 並將行為添加到 ViewPager app:layout_behavior="@string/appbar_scrolling_view_behavior"

我寫了一個完整的例子! https://github.com/erikcaffrey/AndroidDesignSupportLibrary

希望對你有幫助!

我很抱歉我的英語。

我將向您展示我是如何為我的應用程序制作的(最小 sdk:14,目標 sdk:22)。 我不使用片段,我的活動中只有一個 webview,但處理程序是相同的。 問題是當你在 webview 中滾動時,Android 不像滾動事件那樣處理它,webview 處理他自己的事件。

首先,我在 res 文件夾中定義了 style.xml。 我使用透明和覆蓋的 ActionBar,當您想隱藏和顯示時,這會更好:

res/styles.xml

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="@android:style/Theme.Holo">
        <!-- Customize your theme here. -->
        <item name="android:windowActionBarOverlay">true</item>
        <item name="android:actionBarStyle">@style/MyActionBar</item>

    </style>

    <!-- ACTION BAR STYLES -->
    <style name="MyActionBar" parent="@android:style/Widget.Holo.ActionBar">
        <item name="android:background">@color/actionbar_background</item>

    </style>

</resources>

然后在清單中,我定義了應用程序和應用程序部分中的 ActionBar 的樣式:

<application
        android:allowBackup="true"
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>

最后在 MainActivity 中,必須控制 webview 中的手勢。 您必須實現 View.OnTouchListener 和 Handler.Callback。 當你在 webview 上觸摸時,你必須比較開始事件和結束事件:

主Activity.Java

public class MainActivity extends Activity implements View.OnTouchListener, Handler.Callback {

    private float x1,x2,y1,y2; //x1, y1 is the start of the event, x2, y2 is the end.
    static final int MIN_DISTANCE = 150; //min distance for a scroll up event

    private static final int CLICK_ON_WEBVIEW = 1;
    private static final int CLICK_ON_URL = 2;
    private static final int UP_ON_WEBVIEW = 3;


    private final Handler handler = new Handler(this);

    public WebView webView;
    private WebViewClient client;
    private WebAppInterface webAppInt = new WebAppInterface(this);


    @Override
    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        webView = (WebView)findViewById(R.id.myWebView);
        webView.setOnTouchListener(this);

        client = new WebViewClient();
        webView.setWebViewClient(client);        
        webView.loadDataWithBaseURL("file:///android_asset/", "myweb.html", "text/html", "UTF-8", "");

    }

//HERE START THE IMPORTANT PART
    @Override
    public boolean onTouch(View v, MotionEvent event) {
        if (v.getId() == R.id.myWebView && event.getAction() == MotionEvent.ACTION_DOWN){
            x1 = event.getX();
            y1 = event.getY();
            handler.sendEmptyMessageDelayed(CLICK_ON_WEBVIEW, 200);
        } else if (v.getId() == R.id.myWebView && event.getAction() == MotionEvent.ACTION_UP){
            x2 = event.getX();
            y2 = event.getY();

            handler.sendEmptyMessageDelayed(UP_ON_WEBVIEW, 200);
        }

        return false;
    }

    @Override
    public boolean handleMessage(Message msg) {
        if (msg.what == CLICK_ON_URL){ //if you clic a link in the webview, thats not a scroll
            handler.removeMessages(CLICK_ON_WEBVIEW);
            handler.removeMessages(UP_ON_WEBVIEW);
            return true;
        }
        if (msg.what == CLICK_ON_WEBVIEW){

            Toast.makeText(this, "WebView clicked", Toast.LENGTH_SHORT).show();
            return true;
        }
        if (msg.what == UP_ON_WEBVIEW){
            float deltaX = x2 - x1; //horizontal move distance
            float deltaY = y2 - y1; //vertical move distance
            if ((Math.abs(deltaX) > MIN_DISTANCE) && (Math.abs(deltaX) > Math.abs(deltaY)))
            {
                // Left to Right swipe action
                if (x2 > x1)
                {
                    Toast.makeText(this, "Left to Right swipe [Next]", Toast.LENGTH_SHORT).show ();
                }

                // Right to left swipe action
                else
                {
                    Toast.makeText(this, "Right to Left swipe [Previous]", Toast.LENGTH_SHORT).show ();
                }

            }
            else if ((Math.abs(deltaY) > MIN_DISTANCE) && (Math.abs(deltaY) > Math.abs(deltaX)))
            {
                // Top to Bottom swipe action -- i SWOW MY ACTIONBAR ON SCROLLDOWN
                if (y2 > y1)
                {
                    getActionBar().show();
                    Toast.makeText(this, "Top to Bottom swipe [Show Bar]", Toast.LENGTH_SHORT).show ();
                }

                // Bottom to top swipe action -- I HIDE MY ACTIONBAR ON SCROLLUP
                else
                {
                    getActionBar().hide();
                    Toast.makeText(this, "Bottom to Top swipe [Hide Bar]", Toast.LENGTH_SHORT).show ();
                }
            }
            return true;
        }
        return false;
    }
}

我希望那對你有幫助。

只需在您的工具欄或 FAB 按鈕中添加這一行。

app:layout_scrollFlags="scroll|enterAlways"

app:layout_scrollFlags="scroll|enterAlways"行將導致當用戶向下滾動列表時我們的Toolbar將滾動屏幕,並且一旦他開始向上滾動, Toolbar將再次顯示。 干凈簡單,這就是CoordinatorLayout的力量!

請查看此鏈接https://mzgreen.github.io/2015/06/23/How-to-hideshow-Toolbar-when-list-is-scrolling(part3)/&re=1&ts=1453224208&sig=ALL1Aj5aKrtAlylt-Qt3Ci6quwyff

隱藏特定片段的菜單:

       setHasOptionsMenu(true); //Inside of onCreate in FRAGMENT:  


   @Override
   public void onPrepareOptionsMenu(Menu menu) {
       menu.findItem(R.id.action_search).setVisible(false);
   }

只需將app:layout_scrollFlags="scroll|enterAlways"放在您的工具欄上就足夠了。

暫無
暫無

聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.

 
粵ICP備18138465號  © 2020-2024 STACKOOM.COM