当在
NestedScrollView
中使用WebView
时,存在一些问题。我主要遇到的问题是,随着向下滚动加载更多内容的网站,例如vimeo.com,无法正常工作。而且将视图设置为LAYER_TYPE_HARDWARE
也不起作用,可能是因为相同的原因,它基本上会因高度而崩溃。那么,如果我想在WebView
中滚动时折叠工具栏,有没有替代NestedScrollView
的方法?
以下是我的代码。为了重现该问题,只需加载vimeo.com并滚动到底部。
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);
}
}
编辑:忘了提到,我已经尝试将它包装在FrameLayout
、LinearLayout
、RelativeLayout
等中。我还尝试设置大小为特定数字。