import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
+import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.util.Patterns;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
+import android.view.ViewTreeObserver;
import android.view.inputmethod.InputMethodManager;
import android.webkit.WebChromeClient;
import android.webkit.WebView;
static String formattedUrlString;
static WebView mainWebView;
static ProgressBar progressBar;
+ static SwipeRefreshLayout swipeToRefresh;
static final String homepage = "https://www.duckduckgo.com";
@Override
setContentView(R.layout.activity_webview);
final EditText urlTextBox = (EditText) findViewById(R.id.urlTextBox);
+ swipeToRefresh = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayoutContainer);
mainWebView = (WebView) findViewById(R.id.mainWebView);
progressBar = (ProgressBar) findViewById(R.id.progressBar);
+ // Implement swipe down to refresh.
+ swipeToRefresh.setColorSchemeColors(0xFF0097FF);
+ swipeToRefresh.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
+ @Override
+ public void onRefresh() {
+ mainWebView.loadUrl(formattedUrlString);
+ }
+ });
+
+ // Only enable swipeToRefresh if is mainWebView is scrolled to the top.
+ mainWebView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
+ @Override
+ public void onScrollChanged() {
+ if (mainWebView.getScrollY() == 0) {
+ swipeToRefresh.setEnabled(true);
+ } else {
+ swipeToRefresh.setEnabled(false);
+ }
+ }
+ });
+
// setWebViewClient makes this WebView the default handler for URLs inside the app, so that links are not kicked out to other apps.
// Save the URL to formattedUrlString and update urlTextBox before loading mainWebView.
mainWebView.setWebViewClient(new WebViewClient() {
public boolean shouldOverrideUrlLoading(WebView view, String url) {
- formattedUrlString=url;
+ formattedUrlString = url;
urlTextBox.setText(formattedUrlString);
mainWebView.loadUrl(formattedUrlString);
return true;
progressBar.setVisibility(View.VISIBLE);
} else {
progressBar.setVisibility(View.GONE);
+ // Stop the refreshing indicator if it is running.
+ swipeToRefresh.setRefreshing(false);
}
}
});