防止android webview加载某个url

Question

我想提高我的webview的性能。
目前我的webview正在加载几个资源，我不需要为我的应用程序，如* .css或* .jpg。

我该如何防止加载url的扩展名？

使用即时通讯API级别7

Answer 1

如果你能要求11 API生活，你可以实现shouldInterceptRequest返回某种空WebResourceResponse与这些扩展名的URL。

Answer 2

myWebView.setWebViewClient(new MyWebViewClient()); 
protected class MyWebViewClient extends WebViewClient { 
@Override 
public boolean shouldOverrideUrlLoading(WebView view, String url) { 
    String ext = MimeTypeMap.getFileExtensionFromUrl(url); 
    if (ext.eq..... 

Answer 3

如果所有你需要的是从网页中的文字，你可以刮的HTML，并从那里解析出来：

HttpClient httpClient = new DefaultHttpClient(); 
    HttpContext localContext = new BasicHttpContext(); 
    String url = "http://www.google.com"; 

    BufferedReader reader; 
    HttpGet httpGet = new HttpGet(url); 
    String result = ""; 

    try { 
     HttpResponse response = httpClient.execute(httpGet, localContext); 
     reader = new BufferedReader(new InputStreamReader(response.getEntity().getContent())); 

     String line = null; 
     result = ""; 
     while ((line = reader.readLine()) != null){ 
      result += line + "\n"; 
     } 
    } catch(Exception e){} 

    // result now contains the html text 

或者你甚至可以做到这一点并重新创建页面，减.jpg和.css引用。

Answer 4

阻止加载某些URL

的Android的WebView你必须检查装载网址为等于或没有，如果不是不加载webviw

MainActivity.Java

import android.app.AlertDialog; 
import android.app.ProgressDialog; 
import android.content.Context; 
import android.content.Intent; 
import android.graphics.Bitmap; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.support.v7.widget.Toolbar; 
import android.util.Log; 
import android.view.MenuItem; 
import android.view.View; 
import android.webkit.WebResourceError; 
import android.webkit.WebResourceRequest; 
import android.webkit.WebView; 
import android.webkit.WebViewClient; 
import android.widget.ImageView; 
public class MainActivity extends AppCompatActivity implements View.OnClickListener { 
    private static final String TAG = "WebActivity"; 
    private Context mContext; 
    WebView webview; 
    Toolbar toolbar; 
    ImageView mBackResource; 
    Boolean progress = true; 
    private boolean isRedirected = true; 
    String urlintent; 
    public static ProgressDialog pDialog; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_webview); 
     mContext = MainActivity.this; 
     urlintent = "https://www.google.co.in"; 
     WebView wv = (WebView) findViewById(R.id.webView); 
     mBackResource = (ImageView) findViewById(R.id.backarrowwufoo); 
     mBackResource.setOnClickListener(this); 
     toolbar = (Toolbar) findViewById(R.id.toolbar); 
     wv.setScrollBarStyle(WebView.SCROLLBARS_OUTSIDE_OVERLAY); 
     wv.loadUrl(urlintent); 
     wv.setWebViewClient(new WebViewClient() { 
      @Override 
      public boolean shouldOverrideUrlLoading(WebView view, String url) { 
       Log.e(TAG, "url check" + url + "intent" + urlintent); 
       if (url.equals(urlintent)) { 
        Log.e(TAG, "url check" + url + "intent" + urlintent); 
        //Load your page if it equals 
        view.loadUrl(url); 
        return false; // let me handle this! 
       } else { 
        //Do not load your page if it is not equals 
        return true; // no need to use loadUrl! 
       } 
      } 
      @SuppressWarnings("deprecation") 
      @Override 
      public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) { 
       // Handle the error 
       if (errorCode == -2 || errorCode == -8) { 
        view.loadUrl("file:///android_asset/error.html"); 
       } 
       if (errorCode == -14) { 
        view.loadData("Page cannot be found on server", "text/html", "UTF-8"); 
       } 
      } 
      @TargetApi(android.os.Build.VERSION_CODES.M) 
      @Override 
      public void onReceivedError(WebView view, WebResourceRequest req, WebResourceError rerr) { 
       // Redirect to deprecated method, so you can use it in all SDK versions 
       onReceivedError(view, rerr.getErrorCode(), rerr.getDescription().toString(), req.getUrl().toString()); 
      } 
      @Override 
      public void onPageStarted(WebView view, String url, Bitmap favicon) { 
       // TODO Auto-generated method stub 
       super.onPageStarted(view, url, favicon); 
       //   Log.d("onPageStarted", "onPageStarted:" + url); 
       if (isRedirected) { 
        if (progress) { 
         progress = false; 
         showProgres(mContext); 
        } 
        isRedirected = false; 
       } 
      } 
      @Override 
      public void onLoadResource(WebView view, String url) { 
       super.onLoadResource(view, url); 
       // Log.v(TAG, "onLoadResource url: " + url); 
      } 
      @Override 
      public void onPageFinished(WebView view, String url) { 
       // TODO Auto-generated method stub 
       super.onPageFinished(view, url); 
       //   Log.d("onPagefinished", "onPagefinished:" + url); 
       if (!isRedirected) { 
        //Do something you want when finished loading 
        isRedirected = true; 
        if (!progress) { 
         hidepDialog(); 
         progress = true; 
        } 
       } 
      } 
     }); 
    } 
    @Override 
    public void onClick(View v) { 
     switch (v.getId()) { 
      case R.id.backarrowwufoo: 
       onBackPressed(); 
       break; 
     } 
    } 
    @Override 
    protected void onDestroy() { 
     super.onDestroy(); 
     if (!progress) { 
      hidepDialog(); 
      progress = true; 
     } 
    } 
    public static void showProgres(Context context) { 
     pDialog = new ProgressDialog(context); 
     pDialog.setMessage("Please wait..."); 
     pDialog.setCancelable(false); 
     showpDialog(); 
    } 
    public static void showpDialog() { 
     if (!pDialog.isShowing()) 
      pDialog.show(); 
    } 
    public static void hidepDialog() { 
     if (pDialog.isShowing()) 
      pDialog.dismiss(); 
    } 

} 

Activity_main ：

<?xml version="1.0" encoding="utf-8"?> 
<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:id="@+id/main_content" 
    android:layout_width="match_parent" 
    android:layout_height="match_parent" 
    android:background="@android:color/white" 
    android:fitsSystemWindows="true"> 
    <android.support.design.widget.AppBarLayout 
     android:id="@+id/appbar" 
     android:layout_width="match_parent" 
     app:elevation="0dp" 
     android:layout_height="wrap_content" 
     android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"> 
     <android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android" 
      android:id="@+id/toolbar" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:background="@color/colorPrimaryDark" 
      android:minHeight="?attr/actionBarSize"> 
      <RelativeLayout 
       android:layout_width="match_parent" 
       android:layout_height="wrap_content" 
       android:paddingRight="10dp"> 
       <ImageView 
        android:id="@+id/backarrowwufoo" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content" 
        android:layout_alignParentLeft="true" 
        android:layout_gravity="center" 
        android:scaleType="center" 
        android:padding="14dp" 
        android:src="@drawable/ic_arrow" 
        android:gravity="center" /> 
      </RelativeLayout> 
     </android.support.v7.widget.Toolbar> 
    </android.support.design.widget.AppBarLayout> 
    <WebView 
     android:id="@+id/webView" 
     android:layout_width="match_parent" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior" 
     android:padding="10dp" 
     android:layout_height="match_parent" /> 
</android.support.design.widget.CoordinatorLayout>