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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I'm passing a bitmap through a bundle to an activity which I called cameraView on which the user has access to the camera of the device. I'd like to overlay that bitmap with transparency using the camera as the background. Is it possible? to put the bitmap in front of the camera? And how can I change the transparency level? Here is my code: This is the camview.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent" android:layout_height="fill_parent"
android:orientation="vertical">
<SurfaceView android:id="@+id/surface_camera" android:layout_width="fill_parent"
android:layout_height="10dip" android:layout_weight="1"> </SurfaceView> </RelativeLayout>
And this is the java:
public class cameraView extends Activity implements SurfaceHolder.Callback{
SurfaceView mSurfaceView; SurfaceHolder mSurfaceHolder;
Camera mCamera; boolean mPreviewRunning=false; private Context mContext = this;
public void onCreate(Bundle icicle) { super.onCreate(icicle);
setContentView(R.layout.camview); Bundle f = getIntent().getExtras();
picture = f.getParcelable("bitmap"); mSurfaceView = (SurfaceView) findViewById(R.id.surface_camera); mSurfaceHolder = mSurfaceView.getHolder();
mSurfaceHolder.addCallback(this); mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
} @Override // Create the Surface and Open the Camera
public void surfaceCreated(SurfaceHolder holder) { mCamera = Camera.open();
} @Override // Reacts for camera changes public void surfaceChanged(SurfaceHolder holder,
int format, int w,int h) { if (mPreviewRunning) { mCamera.stopPreview();
} Camera.Parameters p = mCamera.getParameters(); p.setPreviewSize(w, h);
mCamera.setParameters(p); try { mCamera.setPreviewDisplay(holder);
} catch (IOException e) { e.printStackTrace();
} mCamera.startPreview(); mPreviewRunning = true;
} @Override // When the camera is closed
public void surfaceDestroyed(SurfaceHolder holder) { mCamera.stopPreview();
mPreviewRunning = false; mCamera.release(); }
// When the picure is taken. This method gives the byte[] of the picture
Camera.PictureCallback mPictureCallback = new Camera.PictureCallback() {
public void onPictureTaken(byte[] imageData, Camera c) {
} };
I am working on a paint application for Android. Now I want to implement an eraser to allow erasing parts of a loaded bitmap by using touch input and making the bitmap transparent along the finger's path.
A very good example of what I try to achieve is shown in the application Steamy Window for Android. Steamy Window simulates a fogged window, where a user can wipe parts of the fog via touch input.
UPDATE: I have posted the most important sections of my current code below. I am not really happy with it for the following reasons:
Drawing is quite sluggish. What can I improve here?
I am looking for a way to use an alpha mask in order to set the pixel transparency/alpha of the pixels as I want to simulate a paint brush. Any suggestions how this could be achieved?
CODE:...................
How can I set the Background for a button to a transparent Color, like transparent Blue for eg, instead of a solid blue? When I use button.setBackgroundColor(Color.BLUE) it sets it to a solid blue.
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Do you know if there is a way to keep transparent pixels intact while applying a color filter?
Used my camera this morning, then i went to use it again this afternoon and something seemed to have stopped it from working properly between then and now. With both the camera and camcorder all i get is this transparent purple/pinkish color. I dont know anything about cameras but is there something wrong with the lens? YouTube - HTC Evo camera not functioning properly
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Is there something like that?
I'm working on Android game and there are some problem appear I want to fill a color on bitmap object but can not I tried bitmap.setPixel but my Image is PNG format (like a circle or unsharp, surrounded with transparent color) and android can not getHeight() or getWidth(), ie.
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View 3 Replies View RelatedI have a scenario at hand, for which I need a solution as soons as possible. Here is the problem statement: I need to show an image overlapped by some other image, 100%. The condition is that the picture in background should also be visible through the foreground picture but only through some part of the foreground picture. Please try to visualise how it should look like. There is a picture shown and in middle of it, there is a transparent area through which the background image is visible. I knew that I can make an image transparent and make the background image visible but here I want only some part of the foreground image to be transparent so that it looks like sort of picture frame applied to the background puicture. And for those who read the statement carefully would have understood that the ultimate thing desired is to have a picture frame applied to the picture. Can anyone please suggest a good way to do this.
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The background android screen image should be visible.
I have an image of a map. I want to draw lines over that image.I have successfully displayed both the line and the image. But , the line is not transparently appearing over the image. The image is only displayed when i run the program. But,if i change the coordinates of the line so that it doesn't overlap with the image,the line is getting displayed.
Pls tell me what i should do to make the line transparent so that both the image and the line are getting displayed.
How can I make certain pixels of an DrawableBitmap transparent?
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View 1 Replies View RelatedI'm trying to make a GUI program with the Android SDK, using their Lunar Lander example as a significant self-teaching tool in the process. I've noticed their sprites' images' backgrounds, which were at least usually pure white, did not show up in their program. I want to ask how they did that, since their site doesn't explain simple things very well. I've managed to pull that off before on another GUI SDK, wherein all I had to do was to call a function and pass it a few floats to define a certain color, and until my code told it to do otherwise, that function would make sure that that particular color in my sprites' images was totally transparent. However I've wrestled with the Lunar Lander example and getting my own program to show some custom graphics for a week or two now, and I haven't noticed any such function call in the Lunar Lander example. I tried to look for it, but I did not find anything. I've tried to Google some tutorial or other reference material, but what I've found so far is just straying off into unrelated areas and totally dodging this EXTREMELY important lesson on the SDK's basics.
View 2 Replies View RelatedMaking the touched areas of bitmap image transparent(seems like erasing) while I am moving my finger on that image.
I am having a PNG file with Alpha channel in it. I want to turn the touched pixels to transparent so that, the user can feel that he is actually erasing it.
For this I am using frame layout to load 2 layers. Down layer is for content and upper layer is an Imageview for erasing. I need erase the upper layer when user touch and move his finger on it.
I am not getting how to make it transparent. can anyone please help me in this. If possible please direct me to any sample code, as I am very new to this image processing.
I'm trying to use Spinner as a button with selection pop-up. Basically I want an icon and when user clicks it - the popup list is displayed and user can make a selection. The Spinner happily accepts icon image as drawable background. Unfortunately when I select a value the text overlays the background. Is it possible to set selection text color as a transparent? Or maybe there's a better way?
View 3 Replies View RelatedI'm rooted and running WW 4.6 if this helps.
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View 1 Replies View RelatedI'm currently running the adw launcher and I love it. I love the numerous customization options that it has. I was just wondering if there is a way in the settings to adjust the transparency of the status bar like it has for the app drawer. I currently have the 8.2 version of adw that I downloaded from the devs website and I can't figure out the settings to adjust the transparency of the status bar.
View 3 Replies View RelatedI 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:
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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.
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Anyone know if there is a way around any of these problems?
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?
I want to know how to make the notification pull menu semi-transparent on a custom ROM.I am no developer...I am using ARHD Rom and want to make the notification pull down menu semi-transparent like in ViperX ROM.
View 1 Replies View RelatedI 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?
seems pretty straightforward.
CODE:..............
But doesn't work!
It scrunches the layout background as the background to each button, I want it to span all three buttons...
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.............
View 1 Replies View RelatedI have some png files that I am applying a color to. The color changes depending on a user selection. I change the color via 3 RGB values set from another method. The png files are a random shape with full transparency outside the shape. I don't want to modify the transparency, only the RGB value. Currently, I'm setting the RGB values pixel by pixel (see code below).I've come to realize this is incredibly slow and possibly just not efficient enough do in an application. Is there a better way I could do this? Here is what I am currently doing. You can see that the pixel array is enormous for an image that takes up a decent part of the screen
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