Preventing WebView reload on Rotate - Android Studio

Question

When I rotate my screen, the WebView reloads the whole page. So I disabled rotation in Android_Manifest.xml file, but it would be really cool if I could make rotation possib

Answer 1

There are 3 points must be done. This is a full solution for me.

1. AndroidManifest.xml need config both orientation and screenSize in android:configChanges for target activity

   <?xml version="1.0" encoding="utf-8"?>
   <manifest xmlns:android="http://schemas.android.com/apk/res/android"
       package="com.example.skatetube.skatetube">
       <application
           <activity android:name=".WebViewActivity"
               android:configChanges="orientation|screenSize">
           </activity>
       </application>
   </manifest>
   

2. Need to override onSaveInstanceState and onRestoreInstanceState of Activity to make state can be restore when rotated

   @Override
   protected void onSaveInstanceState(Bundle outState)
   {
       super.onSaveInstanceState(outState);
       mWebView.saveState(outState);
   }
   
   @Override
   protected void onRestoreInstanceState(Bundle savedInstanceState)
   {
       super.onRestoreInstanceState(savedInstanceState);
       mWebView.restoreState(savedInstanceState);
   }
   

3. Not loading URL again when screen rotate, use savedInstanceState to know current status in onCreate() of target activity

   @Override
   protected void onCreate(@Nullable Bundle savedInstanceState) {
       mWebView = (WebView) findViewById(R.id.webView_h5);
       if (savedInstanceState == null) {
           mWebView.loadUrl(url);
       }
   }
   

Miss any one of those three, my activity still reload.

Answer 2

well no need of java code just copy this code in place of your activity tag in Manifest.xml

<activity
        android:name=".SkateTube"
        android:theme="@style/AppTheme.NoActionBar"
        android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"
        android:label="State preserving implementation"/>

Answer 3

All you need to do is Override onSaveInstanceState and onRestoreInstanceState.

@Override
protected void onSaveInstanceState(Bundle outState ){
    super.onSaveInstanceState(outState);
    mWebView.saveState(outState);
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState){
    super.onRestoreInstanceState(savedInstanceState);
    mWebView.restoreState(savedInstanceState);
}

and one other solution could be to update your Activity tag in manifest to

android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize"