android webview function onPagefinished is called twice

android, android-webview

Solution

I solved the issue by moving the code from onPageFinished to this Function

Code

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url){

            if (url.startsWith(MobileConstants.CALLBACK_URL)) {
                if (url.indexOf("code=") !=  -1) {

                    String code = url.substring(url.indexOf("code=")+5);
                    Log.i ("code", code);
                    if (code != null && !code.equals("")  ){
                        view.setVisibility(View.GONE);
                        Token accessToken = service.getAccessToken(null, new Verifier(code));
                        Log.i("access_token",accessToken.getToken());


                        SharedPreferences settings = getSharedPreferences("access_token" , 0);
                        SharedPreferences.Editor editor = settings.edit();
                        if(accessToken.getToken() != null)
                            editor.putString("access_token", accessToken.getToken() );

                        access = accessToken.getToken();

                        Intent map3 = new Intent(OAuthAccessTokenActivity.this, Dashboard.class);

                        map3.putExtra("access_token", accessToken.getToken());
                        startActivity(map3);
                        return true;
                    }


                } else if (url.indexOf("error=")!=-1) {
                    view.setVisibility(View.INVISIBLE);
                    return false;
                }

            }
            System.out.println("onPageFinished : " + url);

            return super.shouldOverrideUrlLoading(view, url);

        }

Problem

My android webview function `onPageFinished` is called twice. I don't know why, but it works well on android 2.2 but when I upgrade it to 4+ it does not works. Code is attached below Code ``` @Override public void onPageFinished(WebView view, String url) { if (url.startsWith(MobileConstants.PUSHPIN_CALLBACK_URL)) { if (url.indexOf("code=")!=-1) { String code = url.substring(url.indexOf("code=")+5); Log.i ("code", code); if (code != null && !code.equals("") ){ view.setVisibility(View.GONE); Token accessToken = service.getAccessToken(null, new Verifier(code)); Log.i("access_token",accessToken.getToken()); SharedPreferences settings = getSharedPreferences("access_token" , 0); SharedPreferences.Editor editor = settings.edit(); if(accessToken.getToken() != null) editor.putString("access_token", accessToken.getToken() ); Intent map3 = new Intent(OAuthAccessTokenActivity.this, Dashboard.class); map3.putExtra("access_token", accessToken.getToken()); startActivity(map3); } } else if (url.indexOf("error=")!=-1) { view.setVisibility(View.INVISIBLE); } } System.out.println("onPageFinished : " + url); } ``` Log ``` 07-22 14:29:50.523: E/AndroidRuntime(1186): FATAL EXCEPTION: main 07-22 14:29:50.523: E/AndroidRuntime(1186): java.lang.NullPointerException 07-22 14:29:50.523: E/AndroidRuntime(1186): at com.facebook.android.OAuthAccessTokenActivity$1.onPageFinished(OAuthAccessTokenActivity.java:83) 07-22 14:29:50.523: E/AndroidRuntime(1186): at android.webkit.CallbackProxy.handleMessage(CallbackProxy.java:327) 07-22 14:29:50.523: E/AndroidRuntime(1186): at android.os.Handler.dispatchMessage(Handler.java:99) 07-22 14:29:50.523: E/AndroidRuntime(1186): at android.os.Looper.loop(Looper.java:137) 07-22 14:29:50.523: E/AndroidRuntime(1186): at android.app.ActivityThread.main(ActivityThread.java:4745) 07-22 14:29:50.523: E/AndroidRuntime(1186): at java.lang.reflect.Method.invokeNative(Native Method) 07-22 14:29:50.523: E/AndroidRuntime(1186): at java.lang.reflect.Method.invoke(Method.java:511) 07-22 14:29:50.523: E/AndroidRuntime(1186): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 07-22 14:29:50.523: E/AndroidRuntime(1186): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 07-22 14:29:50.523: E/AndroidRuntime(1186): at dalvik.system.NativeStart.main(Native Method) ```

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