强制链接在 webview 而不是浏览器中打开

Posted 2023-05-07

【中文标题】强制链接在 webview 而不是浏览器中打开

【英文标题】：Force links to open in webview instead of a browser

【发布时间】：2018-02-16 12:57:37

【问题描述】：

我是 android 工作室的新手。

请检查我的代码

问题- 当我单击下面维护的任何活动时，它会在外部浏览器中打开，而不是在同一个 web 视图中加载。所以请建议我如何在同一个 webview 而不是浏览器中加载 url。

我添加了一些代码来停止打开外部浏览器，但它不能正常工作。

package com.hanumanbeniwal.www.hanumanbeniwal;

import android.content.DialogInterface;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AlertDialog;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;

import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.view.KeyEvent;
import android.view.View;
import android.support.design.widget.NavigationView;
import android.support.v4.view.GravityCompat;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.ActionBarDrawerToggle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.Menu;
import android.view.MenuItem;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.ProgressBar;


import com.google.android.gms.ads.AdRequest;
import com.google.android.gms.ads.AdView;

import java.net.URI;

import static com.hanumanbeniwal.www.hanumanbeniwal.R.id.progressBar2;

public class MainActivity extends AppCompatActivity
        implements NavigationView.OnNavigationItemSelectedListener 

    //initializing WebView
    private WebView mwebView;
    ProgressBar progressBar;

    @Override
    protected void onCreate(Bundle savedInstanceState) 
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);


        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
        drawer.setDrawerListener(toggle);
        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
        navigationView.setNavigationItemSelectedListener(this);



        AdView mAdView = (AdView) findViewById(R.id.adView);
        AdRequest adRequest = new AdRequest.Builder().build();
        mAdView.loadAd(adRequest);
        //WebView
        mwebView = (WebView) findViewById(R.id.myWebView);
        WebSettings webSettings = mwebView.getSettings();



        //improve webView performance
        mwebView.getSettings().setRenderPriority(WebSettings.RenderPriority.HIGH);
        mwebView.getSettings().setCacheMode(WebSettings.LOAD_CACHE_ELSE_NETWORK);
        mwebView.getSettings().setAppCacheEnabled(true);
        mwebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
        webSettings.setDomStorageEnabled(true);
        webSettings.setLayoutAlgorithm(WebSettings.LayoutAlgorithm.NARROW_COLUMNS);
        webSettings.setUseWideViewPort(true);
        webSettings.setSavePassword(true);
        webSettings.setSaveFormData(true);
        webSettings.setEnableSmoothTransition(true);
        mwebView.getSettings().setDomStorageEnabled(true);

        //force links open in webview only
        mwebView.setWebViewClient(new MyWebviewClient());
        webSettings.setjavascriptEnabled(true);
        mwebView.loadUrl("http://www.hanumanbeniwal.com");

    

    @Override
    public void onBackPressed() 
        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        if (drawer.isDrawerOpen(GravityCompat.START)) 
            drawer.closeDrawer(GravityCompat.START);
         else 
            super.onBackPressed();
        
    


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

    @SuppressWarnings("StatementWithEmptyBody")
    @Override
    public boolean onNavigationItemSelected(MenuItem item) 
        // Handle navigation view item clicks here.
        int id = item.getItemId();

        if (id == R.id.nav_home) 
            // Handle the camera action
            mwebView.loadUrl("http://www.hanumanbeniwal.com/home");
         else if (id == R.id.nav_video) 
            mwebView.loadUrl("https://www.youtube.com/channel/UCoQcL7eGvx8462O3-Jef-Cg/");
         else if (id == R.id.nav_news) 
            mwebView.loadUrl("https://m.facebook.com/hanumanbeniwal/");
         else if (id == R.id.nav_images) 
            mwebView.loadUrl("https://m.facebook.com/hanumanbeniwal/photos/");
         else if (id == R.id.nav_biography) 
            mwebView.loadUrl("http://www.hanumanbeniwal.com/home");
          else if (id == R.id.nav_contact) 
            mwebView.loadUrl("http://www.hanumanbeniwal.com/contact-us/");
        
         else if (id == R.id.nav_complaint) 
            mwebView.loadUrl("http://www.google.com");
         else if (id == R.id.nav_suggestion) 
            mwebView.loadUrl("http://www.google.com");
        


        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
        drawer.closeDrawer(GravityCompat.START);
        return true;
    

    private class MyWebviewClient extends WebViewClient 
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) 
            if (Uri.parse(url).getHost().equals("www.hanumanbeniwal.com")) 
                //open url contents in webview
                return false;
             else 
                //here open external links in external browser or app
                Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
                startActivity(intent);
                return true;
            

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

            super.onPageStarted(view, url, favicon);
            findViewById(R.id.progressBar2).setVisibility(View.VISIBLE);
        

        @Override
        public void onPageFinished(WebView view, String url) 
            findViewById(R.id.progressBar2).setVisibility(View.GONE);
        

    
    //goto previous page when pressing back button

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) 
        if (event.getAction() == KeyEvent.ACTION_DOWN) 
            switch (keyCode) 
                case KeyEvent.KEYCODE_BACK:
                    if (mwebView.canGoBack()) 
                        mwebView.goBack();
                     else
                    
                        AlertDialog.Builder builder = new AlertDialog.Builder(this);
                        builder.setMessage("Are you sure you want to exit?")
                                .setCancelable(false)
                                .setPositiveButton("Yes", new DialogInterface.OnClickListener() 
                                    public void onClick(DialogInterface dialog, int id) 
                                        finish();
                                    
                                )
                                .setNegativeButton("No", new DialogInterface.OnClickListener() 
                                    public void onClick(DialogInterface dialog, int id) 
                                        dialog.cancel();
                                    
                                );
                        AlertDialog alert = builder.create();
                        alert.show();
                    
                    return true;
            
        
        return super.onKeyDown(keyCode, event);
    

【参考方案1】：

您可以尝试将视频放在 iFrame 中，然后使用 loadData 方法代替 loadUrl

String frameVideo = "<html><body>Video From YouTube<br><iframe width=\"420\" height=\"315\" src=\"https://www.youtube.com/channel/UCoQcL7eGvx8462O3-Jef-Cg\" frameborder=\"0\" allowfullscreen></iframe></body></html>";
mwebView.loadData(frameVideo, "text/html", "utf-8");

【参考方案2】：

webView 内部：

 webview.apply
settings.javaScriptEnabled = true
settings.loadWithOverviewMode = true
settings.useWideViewPort = true
webViewClient = MyClient()
loadUrl("http://www.naver.com")
 


inner class MyClient : WebViewClient() 
    override fun shouldOverrideUrlLoading(view: WebView?, request: 
           WebResourceRequest?): Boolean 
        view?.loadUrl(request?.url?.toString())
        return true
    

这个答案是 @pistolcaffe 13 天前给我的，它非常有效，我希望这对你仍然有用。

【参考方案3】：

而不是

if (Uri.parse(url).getHost().equals("www.hanumanbeniwal.com")) 

尝试使用 contain 或 containsIgnoreCase

if (Uri.parse(url).getHost().containsIgnoreCase("www.hanumanbeniwal.com")) 

或者干脆

if(url.containsIgnoreCase("www.hanumanbeniwal.com"))

Intercept and override HTTP requests from WebView

【讨论】：

错误 - 无法解析符号 '' containsIganoreCase ''

你拼错了ignore...你必须使用apache common lib...或者如果你不想这样做，如果你知道你的url将始终是小写的，那么将包含所有的字符串比 do contains 小写。take a look here