网页不可用，WebView Android

Question

WebView WebDimrah;
WebSettings WebSettingDimrah;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


    WebDimrah  = (WebView)findViewById(R.id.WebView1);
    WebSettingDimrah  = WebDimrah.getSettings() ;

    WebDimrah.setWebViewClient(new WebViewClient());
    WebDimrah.getSettings().setJavaScriptEnabled(true);
    WebDimrah.loadUrl("https://facebook.com");

你好，我有问题，我有一个家庭作业，用 android studio 制作网页视图，我输入 url facebook，然后运行它，但就是这样

我的清单有权限，但在我的 avd 中网页仍然不可用

Logcat：

11-17 19:16:06.535 5829-5829/com.dimrahwebkit E/dalvikvm: Could not find class 'androidx.core.view.ViewCompat$OnUnhandledKeyEventListenerWrapper', referenced from method androidx.core.view.ViewCompat.addOnUnhandledKeyEventListener
11-17 19:16:06.535 5829-5829/com.dimrahwebkit E/dalvikvm: Could not find class 'android.view.WindowInsets', referenced from method androidx.core.view.ViewCompat.dispatchApplyWindowInsets
11-17 19:16:06.545 5829-5829/com.dimrahwebkit E/dalvikvm: Could not find class 'android.view.WindowInsets', referenced from method androidx.core.view.ViewCompat.onApplyWindowInsets
11-17 19:16:06.545 5829-5829/com.dimrahwebkit E/dalvikvm: Could not find class 'android.view.View$OnUnhandledKeyEventListener', referenced from method androidx.core.view.ViewCompat.removeOnUnhandledKeyEventListener
11-17 19:16:06.545 5829-5829/com.dimrahwebkit E/dalvikvm: Could not find class 'androidx.core.view.ViewCompat$1', referenced from method androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener
11-17 19:16:06.585 5829-5829/com.dimrahwebkit E/dalvikvm: Could not find class 'android.graphics.drawable.RippleDrawable', referenced from method androidx.appcompat.widget.AppCompatImageHelper.hasOverlappingRendering
11-17 19:16:06.975 5829-5829/com.dimrahwebkit E/eglCodecCommon: glUtilsParamSize: unknow param 0x000082da
11-17 19:16:06.975 5829-5829/com.dimrahwebkit E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008cdf
11-17 19:16:06.975 5829-5829/com.dimrahwebkit E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008824
11-17 19:16:07.255 5829-5829/com.dimrahwebkit E/eglCodecCommon: glUtilsParamSize: unknow param 0x000082da
11-17 19:16:07.255 5829-5829/com.dimrahwebkit E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008cdf
11-17 19:16:07.255 5829-5829/com.dimrahwebkit E/eglCodecCommon: glUtilsParamSize: unknow param 0x00008824
11-17 19:16:07.255 5829-5829/com.dimrahwebkit E/EGL_emulation: tid 5829: eglSurfaceAttrib(1199): error 0x3009 (EGL_BAD_MATCH)```

Answer 1

你需要overrideWebViewClient的onReceivedSslError()方法才能显示网页。以下是您的代码应如下所示：

private WebView WebDimrah;
private WebSettings WebSettingDimrah;

@SuppressLint("SetJavaScriptEnabled")
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);


WebDimrah  = (WebView)findViewById(R.id.WebView1);
WebSettingDimrah  = WebDimrah.getSettings() ;
WebDimrah.getSettings().setJavaScriptEnabled(true);

WebDimrah.setWebViewClient(new WebViewClient() {
@Override
public void onReceivedSslError(WebView view, SslErrorHandler handler, SslError error) {

handler.proceed();

      }
   });
 WebDimrah.loadUrl("https://facebook.com");

} 

另外，在您的 Android.xml 文件（清单）中添加以下行： android:usesCleartextTraffic="true" 在 ... 标签内。