How to open two webviews in one screen using fragments

问题

could any one help me in figuring out how to open two webviews in the same screen using fragments Android,each webview must display a certain web page for example :1-google,2,yahoo.

i've tried too many tutorials and samples .nothing works fine for me... :(

The main issue for me that conflicting my thoughts, is what to write in the fragment class to open a webView and what to write in the main activity that runs the whole app .

Thanks in advance for any help.. :)

here is my code that runs fine for the portrait mode with one screen and crashes on landscape mode:

package com.example.androidwebviewfragment;


import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;

public class Fragment1 extends Fragment {

    WebView myWebView;
    final static String myBlogAddr = "http://android-er.blogspot.com";
    String myUrl;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.layout_webfragment,container,false);
        myWebView = (WebView)view.findViewById(R.id.mywebview);

        myWebView.getSettings().setJavaScriptEnabled(true);                
        myWebView.setWebViewClient(new MyWebViewClient());

        if(myUrl == null){
            myUrl = myBlogAddr;
        }
        myWebView.loadUrl(myUrl);

        return view;

    }

    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            myUrl = url;
            view.loadUrl(url);
            return true;
        }
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        setRetainInstance(true);
    }

}

and here is the second fragment :

package com.example.androidwebviewfragment;

import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.webkit.WebView;
import android.webkit.WebViewClient;


public class Fragment2 extends Fragment {

    WebView myWebView;
    final static String myBlogAddr = "http://android-er.blogspot.com";
    String myUrl;


    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View view =   inflater.inflate
 (R.layout.layout_webfragment2,container,false);
        myWebView = (WebView)view.findViewById(R.id.mywebview);

        myWebView.getSettings().setJavaScriptEnabled(true);                
        myWebView.setWebViewClient(new MyWebViewClient());

        if(myUrl == null){
            myUrl = myBlogAddr;
        }
        myWebView.loadUrl(myUrl);

        return view;

    }

    private class MyWebViewClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            myUrl = url;
            view.loadUrl(url);
            return true;
        }
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        setRetainInstance(true);
    }

}

And here is the main activity: package com.example.androidwebviewfragment;

import android.app.Activity;
import android.os.Bundle;

public class MainActivity extends Activity {

/* (non-Javadoc)
 * @see android.app.Activity#onCreate(android.os.Bundle)
 */
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

}

the .xml files are :

1-Fragment 1 :

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

</LinearLayout>

2-fragment 2 :

</LinearLayout>

3-main xml layout:

<fragment
    android:name="com.example.androidwebviewfragment.Fragment1"
    android:id="@+id/myweb_fragment1"
    android:layout_height="match_parent"
    android:layout_width="match_parent" />

  <fragment
    android:name="com.example.androidwebviewfragment.Fragment2"
    android:id="@+id/myweb_fragment2"
    android:layout_height="match_parent"
    android:layout_width="match_parent" />

 </RelativeLayout>

And this is the main.xml in the layout-land folder:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal" >
   <fragment
    android:name="com.example.androidwebviewfragment.Fragment1"
    android:id="@+id/myweb_fragment"
    android:layout_height="match_parent"
    android:layout_width="match_parent" />

  <fragment
    android:name="com.example.androidwebviewfragment.Fragment2"
    android:id="@+id/myweb_fragment"
    android:layout_height="match_parent"
    android:layout_width="match_parent" /> 

 </LinearLayout>

The error on land scape mode from log:

java.lang.RuntimeException: 
Unable to start activity ComponentInfo{com.example.androidwebviewfragment                                                                                           
/com.example.androidwebviewfragment.MainActivity}
:android.view.InflateException: Binary XML file line #12: Error inflating class fragment

回答1:

In the fragment class you create view and returns it to main activity and in the mainactivity you create a fragmentadapter to bind fragments. See (http://developer.android.com/reference/android/support/v4/view/ViewPager.html) link for more details and see (http://www.vogella.com/articles/AndroidFragments/article.html) for examples.

来源：https://stackoverflow.com/questions/17906861/how-to-open-two-webviews-in-one-screen-using-fragments