progress bar in android webview

Issue

I am trying to add a progress bar in android webview using WebViewClient. It displays the progress bar, a text (loading) and rest of the page is just a blank page.

I want to keep the current page while loading the next page and display the progress bar on the top of the current page, so that user don't have to see the blank loading page..

May someone please help me with that? How to keep the current page intake while showing the progress bar on top, until the next page is 100% loaded.

Solution

public class About extends AppCompatActivity {

    WebView myWebView;
    ProgressBar progressBar;
    FrameLayout frameLayout;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_about);

        Toolbar toolbar = findViewById(R.id.toolbar);
        toolbar.setTitle("About CreativeGraphy");
        setSupportActionBar(toolbar);
        if (getSupportActionBar() != null) {
            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
            getSupportActionBar().setDisplayShowHomeEnabled(true);
        }

        progressBar = findViewById(R.id.progress_bar);
        frameLayout = findViewById(R.id.frame_loading);
        progressBar.setMax(100);

        myWebView = findViewById(R.id.webview);
        myWebView.loadUrl("http://www.google.co.in/");
        myWebView.setWebViewClient(new HelpClient());

        myWebView.setWebChromeClient(new WebChromeClient() {
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                frameLayout.setVisibility(View.VISIBLE);
                progressBar.setProgress(newProgress);
                setTitle("Loading....");
                if (newProgress == 100) {
                    frameLayout.setVisibility(View.GONE);
                    //setTitle(View.getTitle());
                }
                super.onProgressChanged(view, newProgress);
            }
        });
        myWebView.getSettings().setJavaScriptEnabled(true);
        myWebView.setVerticalScrollBarEnabled(false);
        progressBar.setProgress(0);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        if (item.getItemId() == android.R.id.home) {
            finish();
        }//close activity when click back button
        return super.onOptionsItemSelected(item);
    }

    public void onBackPressed() {
        if (myWebView.canGoBack()) {
            myWebView.goBack();
        } else {
            super.onBackPressed();
        }
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if ((keyCode == KeyEvent.KEYCODE_BACK)) {
            if (myWebView.canGoBack()) {
                myWebView.goBack();
                return true;
            }
        }
        return super.onKeyDown(keyCode, event);
    }

    private class HelpClient extends WebViewClient {
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            view.loadUrl(url);
            frameLayout.setVisibility(View.VISIBLE);
            return true;
        }
    }
}

try this it has loading

layout

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context=".About">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/app_bar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:theme="@style/AppTheme.AppBarOverlay">

        <android.support.v7.widget.Toolbar
            android:id="@+id/toolbar"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            app:popupTheme="@style/AppTheme.PopupOverlay"
            app:theme="@style/ToolbarColoredBackArrow" />
    </android.support.design.widget.AppBarLayout>

    <FrameLayout
        android:id="@+id/frame_loading"
        android:layout_width="match_parent"
        android:layout_height="3dp"
        android:layout_below="@id/app_bar"
        android:background="@android:color/transparent">

        <ProgressBar
            android:id="@+id/progress_bar"
            style="?android:attr/progressBarStyleHorizontal"
            android:layout_width="match_parent"
            android:layout_height="8dp"
            android:layout_gravity="top"
            android:layout_marginTop="-3dp"
            android:background="@android:color/transparent"
            android:progress="20"
            android:progressDrawable="@drawable/progress_cyclic" />
    </FrameLayout>

    <WebView
        android:id="@+id/webview"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_below="@id/frame_loading" />

</RelativeLayout>

try using 2 webview if its 100% loaded visible it other one gone first will stay while other loads when it is loaded second web view starts loading

Answered By - Vinit Poojary