/
WebViewWrapper.java
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/
WebViewWrapper.java
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package anywheresoftware.b4a.objects;
import java.io.InputStream;
import java.util.Arrays;
import java.util.HashMap;
import android.content.Context;
import android.graphics.Picture;
import android.graphics.drawable.BitmapDrawable;
import android.os.Build;
import android.view.MotionEvent;
import android.view.View;
import android.webkit.HttpAuthHandler;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import anywheresoftware.b4a.BA;
import anywheresoftware.b4a.BA.ActivityObject;
import anywheresoftware.b4a.BA.DontInheritEvents;
import anywheresoftware.b4a.BA.Events;
import anywheresoftware.b4a.BA.Hide;
import anywheresoftware.b4a.BA.Permissions;
import anywheresoftware.b4a.BA.ShortName;
import anywheresoftware.b4a.keywords.Common;
import anywheresoftware.b4a.objects.drawable.CanvasWrapper;
import anywheresoftware.b4a.objects.drawable.CanvasWrapper.BitmapWrapper;
/**
* The WebView view uses the internal WebKit engine to display Html pages.
*The page displayed can be an online page loaded with LoadUrl or a Html string loaded with LoadHtml.
*The PageFinished event is raised after the page loads.
*OverrideUrl is called before loading any Url. If this method returns True then the Url will not be loaded.
*You can use this event as a way to handle click events in your code.
*UserAndPasswordRequired event is raised when accessing a site that requires basic authentication.
*You should return an array of strings with the username as the first element and password as the second element.
*For example:<code>Return Array As String("someuser", "password123")</code>
*Returning Null will cancel the request.
*Sending incorrect credentials will cause this event to be raised again.
*/
@ShortName("WebView")
@ActivityObject
@DontInheritEvents
@Permissions(values={"android.permission.INTERNET"})
@Events(values={"PageFinished (Url As String)", "OverrideUrl (Url As String) As Boolean",
"UserAndPasswordRequired (Host As String, Realm As String) As String()"})
public class WebViewWrapper extends ViewWrapper<WebView>{
@Override
@Hide
public void innerInitialize(final BA ba, final String eventName, boolean keepOldObject) {
if (!keepOldObject) {
setObject(new WebView(ba.context));
getObject().getSettings().setJavaScriptEnabled(true);
getObject().getSettings().setBuiltInZoomControls(true);
}
super.innerInitialize(ba, eventName, true);
getObject().setWebViewClient(new WebViewClient() {
@Override
public void onPageFinished(WebView view, String url) {
ba.raiseEvent(getObject(), eventName + "_pagefinished", url);
}
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
Boolean b = (Boolean) ba.raiseEvent(getObject(), eventName + "_overrideurl", url);
if (b != null)
return b.booleanValue();
return false;
}
@Override
public void onReceivedHttpAuthRequest(WebView view,
HttpAuthHandler handler, String host, String realm) {
Object o = ba.raiseEvent(getObject(), eventName + "_userandpasswordrequired", host, realm);
if (o == null) {
handler.cancel();
}
else {
String[] s = (String[]) o;
handler.proceed(s[0], s[1]);
}
}
});
getObject().setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
case MotionEvent.ACTION_UP:
if (!v.hasFocus()) {
v.requestFocus();
}
break;
}
return false;
}
});
}
/**
* Loads the given Url.
*Example:<code>
*WebView1.LoadUrl("http://www.google.com")</code>
*/
public void LoadUrl(String Url) {
getObject().loadUrl(Url);
}
/**
* Loads the given Html.
*Example:<code>
*WebView1.LoadHtml("<html><body>Hello world!</body></html>")</code>
*You can use "file:///android_asset" to access files added with the file manager:
*<code>WebView1.LoadHtml("<html><body><img src='file:///android_asset/someimage.jpg'/></body></html>")</code>
*Note that files added with the file manager should be accessed with a lower cased name.
*/
public void LoadHtml(String Html) {
getObject().loadDataWithBaseURL("file:///", Html, "text/html", "UTF8", null);
}
/**
* Stops the current load.
*/
public void StopLoading() {
getObject().stopLoading();
}
/**
* Returns the complete html page as a bitmap.
*/
public BitmapWrapper CaptureBitmap() {
Picture pic = getObject().capturePicture();
BitmapWrapper bw = new BitmapWrapper();
bw.InitializeMutable(pic.getWidth(), pic.getHeight());
CanvasWrapper cw = new CanvasWrapper();
cw.Initialize2(bw.getObject());
pic.draw(cw.canvas);
return bw;
}
/**
* Returns the current Url.
*/
public String getUrl() {
return getObject().getUrl();
}
/**
* Gets or sets whether JavaScript is enabled.
*JavaScript is enabled by default.
*/
public boolean getJavaScriptEnabled() {
return getObject().getSettings().getJavaScriptEnabled();
}
public void setJavaScriptEnabled(boolean value) {
getObject().getSettings().setJavaScriptEnabled(value);
}
/**
* Gets or sets whether the internal zoom feature is enabled.
*The zoom feature is enabled by default.
*/
public void setZoomEnabled(boolean v) {
getObject().getSettings().setBuiltInZoomControls(v);
if (Build.VERSION.SDK_INT >= 11)
getObject().getSettings().setDisplayZoomControls(v);
}
public boolean getZoomEnabled() {
return getObject().getSettings().getBuiltInZoomControls();
}
/**
* Zooms in or out according to the value of In.
*Returns true if zoom has changed.
*/
public boolean Zoom(boolean In) {
if (In)
return getObject().zoomIn();
else
return getObject().zoomOut();
}
/**
* Goes back to the previous Url.
*/
public void Back() {
getObject().goBack();
}
/**
* Goes forward to the next Url.
*/
public void Forward() {
getObject().goForward();
}
@Hide
public static View build(Object prev, HashMap<String, Object> props, boolean designer, Object tag) throws Exception{
if (prev == null) {
if (designer) {
View v = new View((Context)tag);
InputStream in = ((Context)tag).getAssets().open("webview.jpg");
BitmapDrawable bd = new BitmapDrawable(in);
in.close();
v.setBackgroundDrawable(bd);
prev = v;
}
else {
WebView wv = ViewWrapper.buildNativeView((Context)tag, WebView.class, props, designer);
wv.getSettings().setJavaScriptEnabled((Boolean)props.get("javaScriptEnabled"));
wv.getSettings().setBuiltInZoomControls((Boolean)props.get("zoomEnabled"));
if (Build.VERSION.SDK_INT >= 11)
wv.getSettings().setDisplayZoomControls((Boolean)props.get("zoomEnabled"));
prev = wv;
}
}
ViewWrapper.build(prev, props, designer);
return (View)prev;
}
}