Question

我有一个webview，如果我点击该页面中的任何链接，它会打开另一个webview。现在我想在第一个webview上覆盖第二个webview。如果我单击第二个webview上的按钮，它应该关闭。这是我的XML页面。

<RelativeLayout 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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="app.MainActivity"
tools:showIn="@layout/activity_main">

<WebView
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:id="@+id/activity_main_webview"/>
<WebView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="45dp"
    android:id="@+id/external_webview">
</WebView>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:id="@+id/ext_link"
    android:layout_height="fill_parent">
    <RelativeLayout android:orientation="horizontal"
        android:layout_width="fill_parent"
        android:background="#FFFFFF"
        android:layout_height="45dp"
        android:weightSum="1">
        <Button
            android:id="@+id/backtonews"
            android:layout_marginTop="7dp"
            android:layout_width="190dp"
            android:layout_height="30dp"
            android:background="@drawable/button">
        </Button>
        </RelativeLayout>
</RelativeLayout>
<FrameLayout
    android:id="@+id/frameLayout"
    android:layout_width="match_parent"
    android:layout_below="@id/toolbar"
    android:visibility="gone"
    android:layout_height="match_parent"></FrameLayout>
<RelativeLayout
    android:id="@+id/container_help"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#88666666"
    android:visibility="invisible" >

    <ImageView
        android:id="@+id/image_help"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:clickable="false"
        android:contentDescription="@string/help_screen"
        android:scaleType="fitXY"
        android:src="@drawable/userguide"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true" />

</RelativeLayout>

我该怎么做？

Answer 1

您必须对XML进行一些更改，但一般情况下我建议通过更改包含WebView的父容器的可见性来执行此操作，如下所示：

((ViewGroup)findViewById(R.id.ext_link)).setVisibility(View.GONE);

首先要表明这一点：

((ViewGroup)findViewById(R.id.ext_link)).setVisibility(View.VISIBLE);

将来当你有点高级时，你应该考虑用碎片来做这类事情。

Answer 2

我会使用Framelayout。像这样：

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="match_parent">

<WebView
    android:id="@+id/webview2"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

<WebView
    android:id="@+id/webview1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

</FrameLayout>

代码：

webview1 = findViewById(R.id.webview1);
webview2 = findViewById(R.id.webview2);
button = findViewById(R.id.backtonews);

webview1.setWebViewClient(new WebViewClient() {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            webview2.loadUrl(url);
            webview1.setVisibility(View.GONE);
            return true;
        }
    });

button.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        webview1.setVisility(View.VISIBLE);
        webview2.setVisility(View.GONE);
    }
});

Answer 3

我面临同样的问题

试用此代码：

Java代码：

public class MainActivity extends Activity {

protected WebView mainWebView;
// private ProgressBar mProgress;
private Context mContext;
private WebView mWebviewPop;
private FrameLayout mContainer;
private ProgressBar progress;

private String url = "http://docscanner.co.nf/intex.html";
private String target_url_prefix = "m.example.com";

public void onBackPressed() {

    if (mainWebView.isFocused() && mainWebView.canGoBack()) {
        mainWebView.goBack();
    } else {
        super.onBackPressed();
        finish();
    }
}

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

    mContext = this.getApplicationContext();

    // Get main webview
    mainWebView = (WebView) findViewById(R.id.wv_main);

    progress = (ProgressBar) findViewById(R.id.progressBar);
    progress.setMax(100);

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
        mainWebView.setWebContentsDebuggingEnabled(true);
    }

    mainWebView.getSettings().setUserAgentString("example_android_app");

    // Cookie manager for the webview
    CookieManager cookieManager = CookieManager.getInstance();
    cookieManager.setAcceptCookie(true);

    // Get outer container
    mContainer = (FrameLayout) findViewById(R.id.webview_frame);


        // Settings
        WebSettings webSettings = mainWebView.getSettings();
        webSettings.setJavaScriptEnabled(true);
        webSettings.setAppCacheEnabled(true);
        webSettings.setJavaScriptCanOpenWindowsAutomatically(true);
        webSettings.setSupportMultipleWindows(true);

        mainWebView.setWebViewClient(new MyCustomWebViewClient());
        mainWebView.setScrollBarStyle(View.SCROLLBARS_OUTSIDE_OVERLAY);

        mainWebView.setWebChromeClient(new MyCustomChromeClient());
        mainWebView.loadUrl(url);


}

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

private class MyCustomWebViewClient extends WebViewClient {

    @Override
    public void onPageStarted(WebView view, String url, Bitmap favicon) {

        progress.setProgress(0);
        progress.setVisibility(View.VISIBLE);
        super.onPageStarted(view, url, favicon);
    }

    @SuppressLint("LongLogTag")
    @Override
    public boolean shouldOverrideUrlLoading(WebView view, String url) {
        String host = Uri.parse(url).getHost();
        Log.d("shouldOverrideUrlLoading", host);
        //Toast.makeText(MainActivity.this, host,
        //Toast.LENGTH_SHORT).show();
        if (host.equals(target_url_prefix)) {
            // This is my web site, so do not override; let my WebView load
            // the page
            if (mWebviewPop != null) {
                mWebviewPop.setVisibility(View.GONE);
                mContainer.removeView(mWebviewPop);
                mWebviewPop = null;
            }
            return false;
        }

        if (host.contains("m.facebook.com") || host.contains("facebook.co")
                || host.contains("google.co")
                || host.contains("www.facebook.com")
                || host.contains(".google.com")
                || host.contains(".google.co")
                || host.contains("accounts.google.com")
                || host.contains("accounts.google.co.in")
                || host.contains("www.accounts.google.com")
                || host.contains("www.twitter.com")
                || host.contains("secure.payu.in")
                || host.contains("https://secure.payu.in")
                || host.contains("oauth.googleusercontent.com")
                || host.contains("content.googleapis.com")
                || host.contains("ssl.gstatic.com")) {
            return false;
        }
        // Otherwise, the link is not for a page on my site, so launch
        // another Activity that handles URLs
        //Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
        //startActivity(intent);
        //return true;
        return false;
    }

    @Override
    public void onPageFinished(WebView view, String url) {
        progress.setVisibility(View.GONE);
        super.onPageFinished(view, url);
    }

    @Override
    public void onReceivedSslError(WebView view, SslErrorHandler handler,
                                   SslError error) {
        Log.d("onReceivedSslError", "onReceivedSslError");
        // super.onReceivedSslError(view, handler, error);
    }
}

public void setValue(int progress) {
    this.progress.setProgress(progress);
}

public void showAlert(Context context, String title, String text) {
    AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(
            context);

    // set title
    alertDialogBuilder.setTitle(title);

    // set dialog message
    alertDialogBuilder.setMessage(text).setCancelable(false)
            .setPositiveButton("OK", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {
                    // if this button is clicked, close
                    // current activity
                    finish();
                }
            }).create().show();

}

private class MyCustomChromeClient extends WebChromeClient {

    @Override
    public boolean onCreateWindow(WebView view, boolean isDialog,
                                  boolean isUserGesture, Message resultMsg) {
        mWebviewPop = new WebView(mContext);
        mWebviewPop.setVerticalScrollBarEnabled(false);
        mWebviewPop.setHorizontalScrollBarEnabled(false);
        mWebviewPop.setWebViewClient(new MyCustomWebViewClient());
        mWebviewPop.getSettings().setJavaScriptEnabled(true);
        mWebviewPop.getSettings().setSavePassword(false);
        mWebviewPop.setLayoutParams(new FrameLayout.LayoutParams(
                ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.MATCH_PARENT));
        mContainer.addView(mWebviewPop);
        WebView.WebViewTransport transport = (WebView.WebViewTransport) resultMsg.obj;
        transport.setWebView(mWebviewPop);
        resultMsg.sendToTarget();

        return true;
    }

    @Override
    public void onProgressChanged(WebView view, int newProgress) {
        // TODO Auto-generated method stub
        super.onProgressChanged(view, newProgress);
        MainActivity.this.setValue(newProgress);
    }

    @Override
    public void onCloseWindow(WebView window) {
        Log.d("onCloseWindow", "called");
    }

}

Xml文件：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ProgressBar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/progressBar"/>
 <WebView
    android:id="@+id/wv_main"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_weight="1" />
     <FrameLayout
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:id="@+id/webview_frame"></FrameLayout>
   </LinearLayout>

webview覆盖在另一个webview上

3 个答案: