Android :: Easiest Way To Make A WebView Display A Bitmap?
May 31, 2010
I have some images that I loaded from a remote source stored in Bitmap variables and I want to display them. In addition to switching between these images the user should also be able to zoom and pan them. My first idea was to somehow pass them via an intent to the built-in gallery application but this doesn't seem to be possible.
A solution that is suggested in several places is using a WebView since it already supports zooming and panning.
My question is how does my Bitmap data get into the WebView? Do I have to write it to a file first, which I would have to remove again later, or is there an easier way?
Or are there even better ways to accomplish my main goal, which is displaying Bitmap data as zoomable and panable images?
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Sep 9, 2009
I am trying to get the webview's content on a bitmap so that i can save it as a image. But I am unable to so. I am getting the BLACK image save instead. All content is missing. Here is my code:
//create a webview WebView w = new WebView(this);
//Loads the url w.loadUrl("http://www.yahoo.com");
//After loading completely, take its picture Picture picture = w.capturePicture();
//Create a new canvas Canvas mCanvas = new Canvas();
//Draw the Picture into the Canvas picture.draw(mCanvas);
//Create a Bitmap Bitmap sreenshot = Bitmap.createBitmap(picture.getWidth(), picture.getHeight(),Config.ARGB_8888);
//copy the content fron Canvas to Bitmap mCanvas.drawBitmap(mBitmapScreenshot, 0, 0, null);
//Save the Bitmap to local filesystem if(sreenshot != null) {
ByteArrayOutputStream mByteArrayOpStream = new ByteArrayOutputStream();
screenshot.compress(Bitmap.CompressFormat.JPEG, 90, mByteArrayOpStream);
try { fos = openFileOutput("yahoo.jpg", MODE_WORLD_WRITEABLE);
fos.write(mByteArrayOpStream.toByteArray()); fos.close();
} catch (FileNotFoundException e) { e.printStackTrace();
} catch (IOException e) { e.printStackTrace(); } }
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Jan 25, 2009
How do I get a bitmap of a webview? I think I can use the capturePicture but how do I then convert that picture object to a bitmap that I can clip and manipulate?
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Feb 9, 2010
I want display image on another bitmap image with text.please send me the code if you are having solution.
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Jul 6, 2010
I am trying to display an bitmap I created in and android program, but all the tutorials I find involve either Drawables or XML in order to display them. Can someone show me the steps needed to display an Bitmap in code?
This is not the entirety of the code, this is just the majority, the rest is related to getting the camera working. code...
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Jan 10, 2010
I'm trying without success to shape a simple screen composed of a webview and a closebutton on the bottom. When i run it i see the button close at bottom but when the loadURL of the webview is done the webview takes all the screen size and hide the close button.
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Sep 24, 2010
I have problem with displaying bitmap image on imageview on high density screen (480x800). When the bitmap image loaded from file on sdcard, the image does not scale to fit hdpi screen. On medium density screen it works normal (320x480).code...
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May 2, 2010
I would like to be able to use OpenGL in the Android to render into a bitmap (or any other sort of buffer I can turn into one), without actually displaying a GLSurfaceView.
The purpose is to dynamically create very complex images using OpenGL, and then drawing those images on the canvas of a MapView.
I have tried overlaying a translucent GLSurfaceView over a MapView, my preferred approach, but it has some problems:
1) I have complex menus I need to display from either the MapView or the GLSurfaceView. I have been doing this using a ListView with its own activity. Unfortunately, that activity pushes the MapView down the stack. The result is a bit of flickering when the ListView activity finishes, popping the MapView back to the top. Even worse, if I use the ListView to overlay the GLSurfaceView (giving it the same complex menu capabilities), when it finishes, the GLSurfaceView reappears but the MapView doesn't display.
2)As soon as the GLSurfaceView is created, the MapView stops fetching and rendering tiles. There seems to be no way to know when the MapView is complete, so I have to delay an arbitrary interval before creating the surfaceview.
3) When the GLSurfaceView is present, the MapView's built-in user interface functions are obscured.
Anyone know if there is a way around any of these problems?
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Sep 16, 2010
I can able to display pdf file (download to the device and using package manager dispaly it).
The above things are working fine if the url ends with .pdf extension. But it is not working if the pdf url ends with doc+2+pdf.
How to display pdf file (pdf url ends wih doc+2+pdf)
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Apr 16, 2010
I want to display pdf contents on webview.
Here is my code:
CODE:....................
I am getting a blank screen. I have set internet permission also.
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Oct 8, 2010
I have an android application to display an image on another. the second image's white color should be converted in to transparent. so i used two imageviews. the original image to be overlayed is bitmap1. image after making transparent is bitmap2. when i run this i got some exceptions atsetPixel method. the code ...
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Jul 13, 2010
When I started to display an image from the SDCARD in WebView, I got errors like:
" Not allowed to load local resource: file://".
I�ve found a solution for this, and you don�t even have to care about ContentProviders�
Here�s an example:
/* Using WebView to display the full-screen image */
WebView full = (WebView)findViewById(R.id.webview);
/* Set up the Zoom controls */
FrameLayout mContentView = (FrameLayout) get Window().
getDecorView().findViewById(android.R.id.content);
final View zoom = this.full.getZoomControls();
mContentView.addView(zoom, ZOOM_PARAMS);
zoom.setVisibility(View.VISIBLE);
/* Create a new Html that contains the full-screen image */
String html = new String();
html = ("<html><center><img src=""+fileName+""></html>" );
/* Finally, display the content using WebView */
full.loadDataWithBaseURL("file:///sdcard/data/data/com.youproject.example "utf-8",
""); Hope you found it useful, let me know how it works for you!
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Feb 28, 2009
I thought it might be interesting to some developers. Here's a complete working example of ContentProvider for this purpose: http://blog.tourizo.com/2009/02/how-to-display-local-file-in-android. I also found a topic here: http://groups.google.com/group/android-developers/browse_thread/threa. Looks like the topic was closed and I couldn't reply there, so I created new one.
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Apr 15, 2010
I am developing a small application in Android. I come across a problem, and not sure whether it is possible in Android platform. I have some local html files. There is an Activity contains a webview, which is used to display these local html files. In some cases, I want to display a picture selected from phone into one of these local html files. Is it possible? Has anyone resolved such problem? I appreciate any of your replies.
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Oct 5, 2010
I tried WebView.getSettings().setLayoutAlgorithm(LayoutAlgorithm.SINGLE_COLUMN); but view crashed in 1.6 OS. I calculate scale(webview.capturePicture()) but I cannot set it after page loaded. Is it any working solution for fitting webview content to display (1.6 OS)?
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Sep 13, 2010
I'm receiving XML which contains elements of HTML and I want to display these to the users. Therefore, I have to set the content programmatically, rather than extract the strings from an android xml resource. I'm using a WebView to display the content, rather than TextView, as it handles some of the HTML markup - bold text for example, and links. However WebView does appear to be rather limited.
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Nov 5, 2009
I have a webview I'd like to display as a dialog. I'd like the webview to fill the entire screen, except for a button below it that I'd like to stay at the bottom of the dialog regardless of how much content is in the webview. Currently my webview fills up the dialog just enough to push the button off the screen. I'm sure this is something pretty easy but for the life of me, I haven't been able to find the magical combination of layouts, views and attribute values to get it to play nice. Just to be clear, I've gotten it so the button floats over the webview but I'd like the webview to stop just above the button and scroll, if that makes sense.
CODE:..............................
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May 26, 2009
I want to make a mirrored/reversal bitmap from the original bitmap source. But I know only a way of copying pixel by pixel.
Is there a easy/fast way to make a mirrored/reversal bitmap?
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May 13, 2009
I am trying to add a webview in my app to display a web page. However, every time I click link on the web page, Browser will be launched to display content in that link. I understand it is something about intent but I am still wondering is there any simpler method to ask webview to display link content within its View ?
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Mar 12, 2010
I am getting some HTML text from a remote server which I am displaying inside a WebView. I need to format the text display and set a font size and color for the WebView. The only way I can think of is: pre-pending the HTML string received with a tag and specify the font information there. What is the correct way to do this?
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Apr 21, 2010
We have a large HTML which contents 1000's of lines. But we want to show content of the HTML file that fits a single screen. We want provide a '>' kind of to show the next contents of the same HTML file. Our objective is to only display the HTML contents that fits the screen.Similar to reader application For user, it seems there are several pages. Is there any way in which we can achieve this functionality. Whether WebView has any function related to full fill the requirement.
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Aug 19, 2010
How to html table with rows and columns in webview in Android. Can I have one sample Example.
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Dec 30, 2009
I've been banging my head against a wall this afternoon trying to get a WebView to work. Below is the code in the main class:
public class fkyougoogle extends Activity {
/** Called when the activity is first created. */
WebView webview;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
webview = (WebView) findViewById(R.id.webview);
webview.getSettings().setJavaScriptEnabled(true);
// WORKS
//webview.loadUrl("http://www.google.com");
// DOESN'T WORK
//webview.loadUrl("http://www.theregister.co.uk");
//webview.loadData("<html><body>hello</body></html>", "text/html", "utf-8");
//webview.loadDataWithBaseURL("fake://", "<html><body>hello</body></html>", "text/html", "utf-8", "http://www.theregister.co.uk/");}}
This is Google's "Hello, Webview" example. If I use a WebView and try to access www.google.com then it works fine. If I try to access any other site then it fails including loadData and it just displays a black screen in the emulator. In the end I would like to read from a local file.
is included under the manifest tag and the XML schema is the same as the Hello Webview example.
Am I missing something obvious here?
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Aug 24, 2010
I have a webview and i wanted it to occupy the whole screen but it seems to have 7-8pix margin on the right side which is being used to display the scroll bar.
Is there anyway I can remove that margin but still display the scroll bars? I want it to do it in the way GMail app layout is done.
Here is the layout that I am using <?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/ android"android:orientation="vertical" android:layout_width="fill_parent"android:layout_height="fill_parent"><WebView android:id="@+id/web_view"android:layout_width="fill_parent"android:layout_height="fill_parent"/> </LinearLayout>
I have tried setting the layout_marginRight="-8dip" but that is a hackish way and also takes the scrollbars off the screen making them invisible.
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Feb 11, 2009
Does anyone have an example on how to recreate a webview display by using the capturepicture() method? Can I save the resulting object in SQLLite and how do I put it on the canvas?
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Jun 9, 2010
I have the following code in a form's submit button onClickListener:
String action, user, pwd, user_field, pwd_field; Code...
How can I take the resulting string (endResult) and start a new activity using an intent that will open webview and load the HTML?
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Dec 23, 2009
I've been doing a lot of searching and I know a lot of other people are experiencing the same OOM memory problems with BitmapFactory. My app only shows a total memory available of 4MB using Runtime. getRuntime ().totalMemory(). If the limit is 16MB, then why doesn't the total memory grow to make room for the bitmap? Instead it throws an error.............
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Jan 14, 2010
I have a locally stored webpage (html) under res/raw folder.There is an image that is referenced in this html page (test.gif) which is stored under res/drawables.When I use a webview to display this page, it does not display the image. How can I correctly reference the path to the test.gif image?I tried using a text view with Html.fromHtml() but that does not parse several html tags.
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Apr 20, 2010
We have a large HTML which contents 1000's of lines. But we want to show content of the HTML file that fits a single screen. We want provide a '>' kind of to show the next contents of the same HTML file. Our objective is to only display the HTML contents that fits the screen.Similar to reader application For user, it seems there are several pages.
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Apr 9, 2010
I am trying to make a webview to open on the bottom of the application to display little information but it keeps taking the whole screen and covering other widgets with information.
Is there a way to make it have a certain size and place on the application?
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