Question

I’m working with web view in Android and I try to add progress bar, here are my codes :

case R.id.studentsite:
            getWindow().requestFeature(Window.FEATURE_PROGRESS);
            setContentView(R.layout.webview);
            WebView wv1 = (WebView)findViewById(R.id.webview);
            WebSettings ws1 = wv1.getSettings();
            final Activity activity = this;
            wv1.setWebChromeClient(new WebChromeClient() {
              public void onProgressChanged(WebView view, int progress) {
                // Activities and WebViews measure progress with different scales.
                // The progress meter will automatically disappear when we reach 100%
                activity.setProgress(progress * 1000);
              }
            });
            wv1.setWebViewClient(new WebViewClient() {
              public void onReceivedError(WebView view, int errorCode, String description, String failingUrl) {
                Toast.makeText(activity, "Oh no! " + description, Toast.LENGTH_SHORT).show();
              }
            });
            wv1.getSettings().setBuiltInZoomControls(true);
            ws1.setJavaScriptEnabled(true);
            wv1.setWebViewClient(new WebViewClient());
            wv1.loadUrl("http://www.studentsite.gunadarma.ac.id");
            break;

The problem is I got an exception on LOGCAT like this :

09-17 13:51:34.487: ERROR/AndroidRuntime(1331): FATAL EXCEPTION: main
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): android.util.AndroidRuntimeException: requestFeature() must be called before adding content
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at com.android.internal.policy.impl.PhoneWindow.requestFeature(PhoneWindow.java:181)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at com.ugsimplify.ugweb.callintent(ugweb.java:89)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at com.ugsimplify.ugweb$1.onClick(ugweb.java:29)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at android.view.View.performClick(View.java:2485)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at android.widget.CompoundButton.performClick(CompoundButton.java:99)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at android.view.View$PerformClick.run(View.java:9080)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at android.os.Handler.handleCallback(Handler.java:587)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at android.os.Handler.dispatchMessage(Handler.java:92)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at android.os.Looper.loop(Looper.java:123)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at android.app.ActivityThread.main(ActivityThread.java:3647)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at java.lang.reflect.Method.invokeNative(Native Method)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at java.lang.reflect.Method.invoke(Method.java:507)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
09-17 13:51:34.487: ERROR/AndroidRuntime(1331): at dalvik.system.NativeStart.main(Native Method)


Do you have any idea how to fix it? Thanks.

Answer 1

Call below line in Oncreate just after super.oncreate

getWindow().requestFeature(Window.FEATURE_PROGRESS);

You are calling it in Button click, for which you would have already set a content.
Progress bar feature can only be requested before setContentView for the very first time.