Esiste un'alternativa a NestedScrollView per l'uso con una WebView?

Question

Quando si utilizza un WebView all'interno di uno NestedScrollView ci sono alcuni problemi. Quello principale che sto combattendo è che i siti che caricano più contenuti mentre scorri verso il basso non funzionano bene, ad esempio vimeo.com. Anche l'impostazione della vista su LAYER_TYPE_HARDWARE non funziona, probabilmente per lo stesso motivo, in pratica si blocca a causa dell'altezza. Quindi, esiste un'alternativa allo NestedScrollView se voglio utilizzare CoordinatorLayout per comprimere la barra degli strumenti quando l'utente scorre all'interno dello WebView?

Il mio codice è di sotto. Per riprodurre il problema, caricare vimeo.com e scorrere fino in fondo.

activity_scrolling.xml

<android.support.design.widget.AppBarLayout 
     android:id="@+id/app_bar" 
     android:layout_width="match_parent" 
     android:layout_height="@dimen/app_bar_height" 
     android:fitsSystemWindows="true" 
     android:theme="@style/AppTheme.AppBarOverlay"> 

     <android.support.design.widget.CollapsingToolbarLayout 
      android:id="@+id/toolbar_layout" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent" 
      android:fitsSystemWindows="true" 
      app:contentScrim="?attr/colorPrimary" 
      app:layout_scrollFlags="scroll|exitUntilCollapsed"> 

      <android.support.v7.widget.Toolbar 
       android:id="@+id/toolbar" 
       android:layout_width="match_parent" 
       android:layout_height="?attr/actionBarSize" 
       app:layout_collapseMode="pin" 
       app:popupTheme="@style/AppTheme.PopupOverlay"/> 

     </android.support.design.widget.CollapsingToolbarLayout> 
    </android.support.design.widget.AppBarLayout> 

    <android.support.v4.widget.NestedScrollView 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     xmlns:app="http://schemas.android.com/apk/res-auto" 
     xmlns:tools="http://schemas.android.com/tools" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior" 
     tools:context="com.webviewnestedscroll.ScrollingActivity" 
     tools:showIn="@layout/activity_scrolling"> 

     <WebView 
      android:id="@+id/webview" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent"></WebView> 
    </android.support.v4.widget.NestedScrollView> 

    <android.support.design.widget.FloatingActionButton 
     android:id="@+id/fab" 
     android:layout_width="wrap_content" 
     android:layout_height="wrap_content" 
     android:layout_margin="@dimen/fab_margin" 
     android:src="@android:drawable/ic_dialog_email" 
     app:layout_anchor="@id/app_bar" 
     app:layout_anchorGravity="bottom|end"/> 

</android.support.design.widget.CoordinatorLayout> 

ScrollingActivity.java

package com.webviewnestedscroll; 

import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.Menu; 
import android.view.MenuItem; 
import android.view.View; 
import android.webkit.WebSettings; 
import android.webkit.WebView; 
import android.webkit.WebViewClient; 

public class ScrollingActivity extends AppCompatActivity { 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_scrolling); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 
     FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab); 
     fab.setOnClickListener(new View.OnClickListener() { 
      @Override 
      public void onClick(View view) { 
       Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG) 
         .setAction("Action", null).show(); 
      } 
     }); 
     WebView view = (WebView) findViewById(R.id.webview); 
     view.setWebViewClient(new WebViewClient()); 
     WebSettings settings = view.getSettings(); 
     settings.setJavaScriptEnabled(true); 
     settings.setAllowContentAccess(true); 
     settings.setAppCacheEnabled(true); 
     settings.setDatabaseEnabled(true); 
     settings.setDomStorageEnabled(true); 
     settings.setRenderPriority(WebSettings.RenderPriority.HIGH); 
     settings.setJavaScriptEnabled(true); 
     settings.setSupportZoom(true); 
     settings.setJavaScriptCanOpenWindowsAutomatically(true); 
     settings.setBuiltInZoomControls(true); 
     settings.setAppCacheEnabled(true); 
     settings.setAppCachePath(getCacheDir().getAbsolutePath()); 
     settings.setDatabaseEnabled(true); 
     settings.setSupportMultipleWindows(true); 
     settings.setLoadWithOverviewMode(true); 
     settings.setUseWideViewPort(true); 
     settings.setDomStorageEnabled(true); 
     settings.setAllowContentAccess(true); 
     settings.setAllowFileAccess(true); 
     settings.setSaveFormData(true); 
     //view.setLayerType(View.LAYER_TYPE_HARDWARE, null); 

     view.loadUrl("http://vimeo.com"); 



    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.menu_scrolling, menu); 
     return true; 
    } 

    @Override 
    public boolean onOptionsItemSelected(MenuItem item) { 
     // Handle action bar item clicks here. The action bar will 
     // automatically handle clicks on the Home/Up button, so long 
     // as you specify a parent activity in AndroidManifest.xml. 
     int id = item.getItemId(); 

     //noinspection SimplifiableIfStatement 
     if (id == R.id.action_settings) { 
      return true; 
     } 
     return super.onOptionsItemSelected(item); 
    } 
} 

EDIT: Ho dimenticato di menzionare, ho già provato avvolgendolo attorno a un FrameLayout, LinearLayout, RelativeLayout, ecc ho Ho anche provato a impostare le dimensioni su un numero specifico.

Answer 1

Come ho referred, si dovrebbe cercare di aggiungere LinearLayout con android:descendantFocusability="blocksDescendants" come:

<android.support.v4.widget.NestedScrollView 
     xmlns:android="http://schemas.android.com/apk/res/android" 
     xmlns:app="http://schemas.android.com/apk/res-auto" 
     xmlns:tools="http://schemas.android.com/tools" 
     android:layout_width="match_parent" 
     android:layout_height="match_parent" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior" 
     tools:context="com.webviewnestedscroll.ScrollingActivity" 
     tools:showIn="@layout/activity_scrolling"> 

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

     <WebView 
      android:id="@+id/webview" 
      android:layout_width="match_parent" 
      android:layout_height="match_parent"></WebView> 

     </LinearLayout> 
</android.support.v4.widget.NestedScrollView> 

maggio sarà utile a voi. Grazie.