AdvancedWebView

Advanced WebView component for Android that works as intended out of the box

Works on Android 2.2+ (API level 8 and above)

Installation

• Include one of the JARs in your libs folder
• or
• Copy the Java package to your project's source folder
• or
• Create a new library project from this repository and reference it in your project

Usage

AndroidManifest.xml

<uses-permission android:name="android.permission.INTERNET" />

Layout (XML)

<im.delight.android.webview.AdvancedWebView
	android:id="@+id/webview"
	android:layout_width="match_parent"
	android:layout_height="match_parent" />

Activity (Java)

Without Fragments

public class MyActivity extends Activity implements AdvancedWebView.Listener {

	private AdvancedWebView mWebView;

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

		mWebView = (AdvancedWebView) findViewById(R.id.webview);
		mWebView.setListener(this, this);
		mWebView.loadUrl("http://www.example.org/");

		// ...
	}

	@SuppressLint("NewApi")
	@Override
	protected void onResume() {
		super.onResume();
		mWebView.onResume();
		// ...
	}

	@SuppressLint("NewApi")
	@Override
	protected void onPause() {
		mWebView.onPause();
		// ...
		super.onPause();
	}

	@Override
	protected void onDestroy() {
		mWebView.onDestroy();
		// ...
		super.onDestroy();
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
		super.onActivityResult(requestCode, resultCode, intent);
		mWebView.onActivityResult(requestCode, resultCode, intent);
		// ...
	}

	@Override
	public void onBackPressed() {
		if (!mWebView.onBackPressed()) { return; }
		// ...
		super.onBackPressed();
	}

	@Override
	public void onPageStarted(String url, Bitmap favicon) { }

	@Override
	public void onPageFinished(String url) { }

	@Override
	public void onPageError(int errorCode, String description, String failingUrl) { }

	@Override
	public void onDownloadRequested(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) { }

	@Override
	public void onExternalPageRequest(String url) { }

}

With Fragments (android.app.Fragment)

Note: If you're using the Fragment class from the support library (android.support.v4.app.Fragment), please refer to the next section (see below) instead of this one.

public class MyFragment extends Fragment implements AdvancedWebView.Listener {

	private AdvancedWebView mWebView;

	public MyFragment() { }

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
		View rootView = inflater.inflate(R.layout.fragment_my, container, false);

        mWebView = (AdvancedWebView) rootView.findViewById(R.id.webview);
        mWebView.setListener(this, this);
        mWebView.loadUrl("http://www.example.org/");

		// ...

		return rootView;
	}

	@SuppressLint("NewApi")
	@Override
	public void onResume() {
		super.onResume();
		mWebView.onResume();
		// ...
	}

	@SuppressLint("NewApi")
	@Override
	public void onPause() {
		mWebView.onPause();
		// ...
		super.onPause();
	}

	@Override
	public void onDestroy() {
		mWebView.onDestroy();
		// ...
		super.onDestroy();
	}

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
        super.onActivityResult(requestCode, resultCode, intent);
        mWebView.onActivityResult(requestCode, resultCode, intent);
        // ...
    }

	@Override
	public void onPageStarted(String url, Bitmap favicon) { }

	@Override
	public void onPageFinished(String url) { }

	@Override
	public void onPageError(int errorCode, String description, String failingUrl) { }

	@Override
	public void onDownloadRequested(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) { }

	@Override
	public void onExternalPageRequest(String url) { }

}

With Fragments from the support library (android.support.v4.app.Fragment)

• Use the code for normal Fragment usage as shown above

• Change

  mWebView.setListener(this, this);

  to

  mWebView.setListener(getActivity(), this);

• Add the following code to the parent FragmentActivity in order to forward the results from the FragmentActivity to the appropriate Fragment instance

  public class MyActivity extends FragmentActivity implements AdvancedWebView.Listener {
  
   @Override
   public void onActivityResult(int requestCode, int resultCode, Intent intent) {
   	super.onActivityResult(requestCode, resultCode, intent);
   	if (mFragment != null) {
   		mFragment.onActivityResult(requestCode, resultCode, intent);
   	}
   }
  
  }

ProGuard (if enabled)

-keep class * extends android.webkit.WebChromeClient { *; }
-dontwarn im.delight.android.webview.**

Features

• Optimized for best performance and security

• Features are patched across Android versions

• File uploads are handled automatically (check availability with AdvancedWebView.isFileUploadAvailable())

• JavaScript and WebStorage are enabled by default

• Includes localizations for the 25 most widely spoken languages

• Receive callbacks when pages start/finish loading or have errors

  @Override
  public void onPageStarted(String url, Bitmap favicon) {
      // a new page started loading
  }
  
  @Override
  public void onPageFinished(String url) {
      // the new page finished loading
  }
  
  @Override
  public void onPageError(int errorCode, String description, String failingUrl) {
      // the new page failed to load
  }

• Downloads are handled automatically and can be listened to

  @Override
  public void onDownloadRequested(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
      // some file is available for download
      // either handle the download yourself or use the code below
  
      final String filename;
      // ...
  
      if (AdvancedWebView.handleDownload(this, url, filename)) {
          // download successfully handled
      }
      else {
          // download couldn't be handled because user has disabled download manager app on the device
          // TODO show some notice to the user
      }
  }

• Enable geolocation support (needs <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />)

  mWebView.setGeolocationEnabled(true);

• Add custom HTTP headers in addition to the ones sent by the web browser implementation

  mWebView.addHttpHeader("X-Requested-With", "My wonderful app");

• Define a custom set of permitted hostnames and receive callbacks for all other hostnames

  mWebView.addPermittedHostname("www.example.org");

  and

  @Override
  public void onExternalPageRequest(String url) {
      // the user tried to open a page from a non-permitted hostname
  }

• Prevent caching of HTML pages

  boolean preventCaching = true;
  mWebView.loadUrl("http://www.example.org/", preventCaching);

• Check for alternative browsers installed on the device

  if (AdvancedWebView.Browsers.hasAlternative(this)) {
      AdvancedWebView.Browsers.openUrl(this, "http://www.example.org/");
  }

• Disable cookies

  // disable third-party cookies only
  mWebView.setThirdPartyCookiesEnabled(false);
  // or disable cookies in general
  mWebView.setCookiesEnabled(false);

• Disallow mixed content (HTTP content being loaded inside HTTPS sites)

  mWebView.setMixedContentAllowed(false);

Dependencies

• Android 2.2+

Contributing

All contributions are welcome! If you wish to contribute, please create an issue first so that your feature, problem or question can be discussed.

License

Copyright 2015 delight.im <info@delight.im>

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

  http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.