Android WebView显示空白页面

Question

我正试图连接到一个网站，并用WebView在安卓手机上显示它，但它总是显示一个空白的白色页面。我正在尝试连接到https://givatram.ort.org.il/

我的代码：

public class MainActivity extends AppCompatActivity {


@SuppressLint({"ClickableViewAccessibility", "SetJavaScriptEnabled"})
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final WebView webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setLoadWithOverviewMode(true);
webview.getSettings().setUseWideViewPort(true);
webview.setWebViewClient(new WebViewClient());
webview.setWebChromeClient(new WebChromeClient());
webview.loadUrl("https://givatram.ort.org.il/");
}
}

XML:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout 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"
tools:context=".MainActivity">

<Button
android:id="@+id/Main_ChangesBTN"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:background="@drawable/button"
android:text="@string/Main.Changes"
android:textAllCaps="false"
android:textColor="#FFFFFF"
android:textSize="25dp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/Main_MessageBTN"
app:layout_constraintVertical_bias="0.724" />
<Button
android:id="@+id/Main_MessageBTN"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
android:background="@drawable/button"
android:text="@string/Main.Messages"
android:textAllCaps="false"
android:textColor="#FFFFFF"
android:textSize="25dp"
android:textStyle="bold"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.811" />
<WebView
android:id="@+id/webview"
android:layout_width="match_parent"
android:layout_height="324dp"
android:layout_marginBottom="8dp"
android:layout_marginTop="8dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.0" />
</android.support.constraint.ConstraintLayout>

这个代码非常适用于其他网站，但对于这个特殊的网站，它显示了一个空白页面，这个网站正常工作

Answer 1

**use inside  onCreate**

webview.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
webview.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
if (Build.VERSION.SDK_INT >= 19) {
webview.setLayerType(View.LAYER_TYPE_HARDWARE, null);
} else {
webview.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
webview.getSettings().setJavaScriptEnabled(true);
webview.getSettings().setPluginState(WebSettings.PluginState.ON);
webview.setWebViewClient(new Callback());
webview.loadUrl("https://givatram.ort.org.il/");
setContentView(webview);

在创建时使用外部

private class Callback extends WebViewClient {
@Override
public boolean shouldOverrideUrlLoading(
WebView view, String url) {
return (false);
}
}