Android :: Able To Get Current OverlayItem Being Drawn

Jul 8, 2010

I want to be able to get some reference to the curent object being drawn. code...

Above is my draw method and I want to extend the draw method to write the title underneath each item for example. This would require the .getTitle() method from the OverlayItem. Possibly some tracking of objects outside of this method but not sure where to put it....

Android :: Able to Get current OverlayItem being drawn


Android :: How To Use OverlayItem's Fields?

Aug 3, 2009

I would like to how to use OverlayItem's fields (Title and snippet) 'cause they are never displayed on the map?

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Android :: Know Which Overlayitem Is Being Tapped?

Nov 17, 2009

Currently I used a map view and placed some overlay items in them

I overiden the onTap function in ItemizedOverlay so that when user tap on the markers icons on the map, some action will perform.

However, I don't know how to know which marker is being tapped so that the related data of the item will be displayed in the screen. How can I do that?

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Android :: When Do I Update OverlayItem List?

Jun 24, 2010

From everything that I've seen and have been reading, I'm apparently supposed to add all my OverlayItems in the constructor, then call Populate().The problem I have conceptually, is that if I'm pulling these items from a database (fed by a web site), then when exactly do I update the items?Also, it seems to me that it's a waste of resources to feed it all the items in advance instead of the ones pertaining to the current location... This seems to be the perfect case to use a ContentProvider, but I don't see anything indicating that one can be used with either ItemizedOverlay or anything else related to the Google Maps API.

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Android :: OverlayItem Not Displaying Markers / What To Show It?

Jul 5, 2010

I have the following code and the markers are not appearing on the map at all! code...

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Android :: Add TextView/Layout To Map's Overlay / OverlayItem?

Apr 12, 2010

When a marker is clicked on google map, a small square area is displayed with hyperlinks. I guess OverlayItem does not render hyperlinks for its snippet. How to achieve this? Ideally I want to assign a layout with all sorts widgets. Presume I can display a small floating activity window when the marker is clicked, but is this the standard way doing this? The drawback of floating activity window is that if want to click another marker, user has to dismiss the current window first.

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Android :: Change State Of Any OverlayItem On Googlemap?

Feb 5, 2010

I am able to display multiple overlayItems on Googlemap, now I want to change icon of any specific overlayItem (to show it is currently selected event). I want to do it through navigation buttons (next, previous) as on Google maps.

I am using StateListDrawable to display icons for OverlayItems. code...

Now my question is how do I change the state of any overlayItem/Icon on map when user click on one of navigation keys?

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Android : After Removing OverlayItem Tap Events Are Still Trigger / Fix?

Oct 27, 2010

I have a simple overlay for a Google Map: http://pastebin.com/Rg8miMSh and I add/remove items on it depending on the zoom level. After removing/adding I call populate on the overlay and invalidate on the map view. Everything works just fine, except 1 glitch: after an item was removed, if I tap its location onTap is still triggered and because the OverlayItem is not there anymore i get java.lang.ArrayIndexOutOfBoundsException in com.google.android.maps.ItemizedOverlay.maskHelper(ItemizedOverlay.java: 562) (full stack trace - http://pastebin.com/KThn4ZLE )

Anyone knows why this is happening or how to fix it? Initially i called clear and added all items all over again which didn't seems to cause this problem. However having many items this was becoming a performance issue. Adding/removing only the difference works much faster and I would like to keep this method.

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Android :: Click A Specific Point On Map And Then Draw Overlayitem It?

Oct 13, 2010

I have been looking this but haven't found a concrete example is there a way to click a specific point on a Map and then draw a overlayitem it?

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Android :: How To Create Message Bubble With 2 Buttons / Appears On Top Of Overlayitem

Mar 20, 2010

I currently have implemented an overlayitem that shows an icon for geopoint on a map application in Android. When the icon is clicked, it brings up an AlertDialog from the onTap method below.Does anyone know how to display a map message bubble directly above the icon overlayitem with 2 callout buttons one to the left of the title and one to the right of the bubble? Does anyone know how to make the overlayitem draggable so I can press and hold it and drag it across the map. I am trying to duplicate the draggable icon behavior that's available on the iPhone.

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Android :: Blocking Current Activity / Screen Till Current Task Is Complete

May 13, 2010

The default behavior of an activity when BACK softkey is pressed is, GO BACK TO PREVIOUS ACTIVITY. If some the same activity is waiting for some response from server or some data updation is going on and then press BACK, I want to wait on the same screen till the current task is completely processed and then move out to the previous activity.

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Android :: Display Simple Text Label / Description Bubble When User Taps On OverlayItem In MapView?

Dec 29, 2009

I would like to further annotate the custom markers I have placed on a MapView (using ItemizedOverlay) by displaying a simple text label that appears for a particular item when the onTap event is fired.

This is a trivial exercise in the Google Maps JavaScript API and in MapKit on iPhone, but it is not obvious to me what the best or easiest way to do this is on Android.

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Android :: Overlays Drawn On The Map

Jul 17, 2010

What I am trying to do - I am continuously getting a stream of lat/lng positions, I want to move a overlay item dynamically on the map based on the lat/lng in the stream. I am displaying the location of moving object dynamically on the map

I am putting my whole code in a while(true) loop and trying to read the stream every 5 seconds and refresh the overlays on the map. But overlay items are not shown until the function (either oncreate, or any onclickeventhandler etc) is completed. For example, test code, I am adding a single test overlay item when ever the user clicks on a button. If I put a wait(2000000) "after" I add overlays and invalidate the map, the overlay is not displayed until the time has elapsed and the function is completed.

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Android :: OpenGl Drawn Something?

May 10, 2010

glReadPixels is too slow, so I need another way. Without testing object by object, Is there any other way?

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Android :: Use SurfaceView Properly , Nothing Is Drawn

May 31, 2009

I had it working with a normal View but that is to slow. I was told to use SurfaceView but can't figure out how to use OnKey with it and if I should use onDraw or draw? And how do I pass stuff to draw? does it happen automatically? code...

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Android :: Does A RemoteView Get Drawn On Screen?

Apr 28, 2009

From the javadoc of RemoteView, it said " * A class that describes a view hierarchy that can be displayed in another process."

But unlike View class, RemoteView does not have a 'draw(Canvas canvas)' method. Can you please tell me which method of RemoteView causing its layout to be drawn on screen?

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Android :: Implement Dynamically Drawn Content?

Feb 2, 2010

Based on the limitations of RemoteViews, it looks to me that the appropriate way to get it actually drawn on the screen is to use an ImageView in the actual layout, then when it is updating, create a ShapeDrawable or two and draw them onto a newly created Bitmap. Then, set that Bitmap as the source of the ImageView. There is Something about that process that I'm just not grokking, though. The following is the code I tried to use to update the widget. I get nothing drawn on the screen at all. The ImageView has a placeholder image just set by its src property. When I don't run the code to update it to my drawing, the placeholder image stays in place. So, I know this code is doing something, just obviously not the right thing.

RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget);
Bitmap bitmap = Bitmap.createBitmap(100, 100, Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);

ShapeDrawable drawable = new ShapeDrawable(new ArcShape(0, 360));
drawable.getPaint().setColor(0xffff0000);
drawable.getPaint().setStrokeWidth(5.0f);
drawable.setIntrinsicWidth(100);
drawable.setIntrinsicHeight(100);
drawable.draw(canvas);

views.setImageViewBitmap(R.id.ImageView01, bitmap);
appWidgetManager.updateAppWidget(appWidgetId, views);

I knew it couldn't be that easy. So, am I even heading in the right direction? Update Ok, maybe that was too much information. The question I'm really trying to ask is this: If I want to draw shapes on a widget, should I use an ImageView and create a bitmap from my ShapeDrawable or is there more appropriate way to draw into a widget where it is constrained by RemoteViews?

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Android :: Get Bitmap Data Before It Is Drawn On Screen

Feb 22, 2010

To any normal android Widgets based on View( Button ,TextView ...), I wanna manipulate the bitmap data before it is drawn on screen. I have tried the onDraw(Canvas canvas) method, But when the programe hit the onDraw(Canvas canvas) method, I think the bitmap has already been drawn to screen.

If there is any way that I can get the bitmap data before it's drawn to screen, so I can prevent it from being displayed , but grab the data, put it on the intent for some further use?

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Android :: GLSurfaceView Swaps 2D Bitmaps Being Drawn / Cause Of This Can Be?

Sep 8, 2010

I have an application that receives information from a database, and is used to visualize 2D bitmaps onto a GLSurfaceView. The information received will determine the x-position of the bitmap, and which bitmap image to use (there are 4 different bitmaps in my res folder to choose from).

Below are the three classes that are being used. The Activity sets the Shapes objects that need to be drawn by passing an ArrayList to the GLLayer class. This ArrayList is passed to the instance of ShapeStorage class via another setList method. This class is responsible for drawing when they are received.

The problem that I'm having is the following. Suppose I receive one object (let's say that it's a square at it's located at x=1). Some time goes by, and I receive another shape (this time, it's a triangle, and it's located at x=-1). However, when this new shape appears on the screen, the old bitmap's appearance changes to a triangle, and the new one becomes a square. In other words, the objects themselves are at the correct position that they are supposed to be at, but the bitmap being associated with them has changed. Does anyone know what the possible cause of this can be? I'm still a newbie to OpenGL-ES, and while this code looks very convoluted, it just involves setting a bunch of various properties for the View. code...

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Android :: Gradient Drawn On Canvas Looks Banded / What To Fix

Sep 23, 2010

I have a gray gradient drawable (png image in res/drawable). If I draw it on a white Canvas it looks banded (not smooth). If I put the gradient on white background in GIMP, and then draw this drawable on the Canvas, it looks great. What's the problem? I tested this on Nexus One. Calling setDither(true) on the drawable has no noticable effect.

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Android :: Taking Screen Shot Of Whatever Is Drawn On View

Oct 28, 2009

I am trying to take a screen shot of whatever is drawn on my custom view's canvas. The getDrawingCache() call returns null sometimes. Any pointers to what I am doing wrong here?

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Android :: Why Force Close Before Activity Screen Is Drawn?

Jun 29, 2010

My app keeps force closing before it starts, eclipse returns no errors in my code and my xml is good.

package com.mhe.test.scan;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class main extends Activity {
/** Called when the activity is first created. */
@Override public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button myScanButton = (Button) findViewById(R.id.myScanButton); myScanButton.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
Intent intent = new Intent("com.google.zxing.client.android.SCAN");
intent.putExtra("SCAN_MODE", "PRODUCT_MODE");
startActivityForResult(intent, 0);
} } );
} EditText totalbox = (EditText) findViewById(R.id.totalbox);
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == 0) { if (resultCode == RESULT_OK) {
String contents = intent.getStringExtra("SCAN_RESULT");
// Handle successful scan totalbox.setText(contents)
} else if (resultCode == RESULT_CANCELED) {
// Handle cancel totalbox.setText("@string/bummer");
} } } }
Essentially it is supposed to call zxing Barcode Scanner to scan a barcode on a button click and return the result into an EditText field.

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Android :: Develop Owner Drawn EditText Widget

Jan 26, 2010

I'm considering to develop owner drawn EditText widget. So, what do you think I should read or refer, firstly? Or, could you give me some good examples of both owner drawn widget or custom widget?

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Android :: Measuring Text Width To Be Drawn On Canvas

Jul 15, 2010

Is there a method which returns the width ( in pixels ) of a text to be drawn on an Android canvas using the drawText() method according to the Paint used to draw it.

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Android :: Measuring Text Height To Be Drawn On Canvas

Sep 6, 2010

Any straight forward way to measure the height of text? The way I am doing it now is by using Paint's measureText() to get the width, then by trial and error finding a value to get an approximate height. I've also been messing around with FontMetrics, but all these seem like approximate methods that suck. I am trying to scale things for different resolutions. I can do it, but I end up with incredibly verbose code with lots of calculations to determine relative sizes. I hate it! There has to be a better way.

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Android :: Drawn Bitmaps Are Not Scrolling In Custom View

Nov 9, 2010

I am creating a CustomView with bigger image based on tutorial on and developers forum. It is scolling fine.I need exact pixel coordinates of my image.I am getting that also.now I want to draw some images upon scrolling image.I am able to draw images using onDraw().But images are not getting scrolled.Any idea how to resolve this?

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Android :: Show Shadow For Text Drawn On Google Map

Jun 7, 2010

In my map application I am using overlay items and texts. I need shadows for both. For overlayitems I am able to display shadows. How to show shadow for the text drawn?

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Android :: What Event Is Fired After All Views Are Fully Drawn?

Oct 16, 2010

I need to capture the absolute positions of some ImageViews to use as drop targets. I can't seem to find what event I need to put my code in to read the screen and get the Left(), Top() .. positions. I do not want monitor the inflation of each individual view. There must be some sort of onScreenFinsihed type of event, but I can't find it. onMeasure and onDraw seem to fire at the start of their work, I need to know when they are done.

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Android :: Get Information Of Activity Lifecycle Callbacks In Views Drawn?

Aug 3, 2010

I want to get the size of a view that is in my activity but I am not able to get that information in any of the activity lifecycle callbacks (onCreate, onStart, onResume). I'm assuming this is because the views have not been drawn yet. At what point are views drawn and is there a callback I can put my code so I can get the size of the view?

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Android :: Push Up Layout In Event That Soft Keyboard Is Drawn

Jul 15, 2010

I am designing an Android app and I'm having a couple of layout issues. I have a screen with 3 EditTexts on it in a row, and I would like for the 'next' key on the soft keyboard to cycle between the EditText fields. As for now, the 'next' key has no effect. Also, when the soft keyboard is displayed, it covers up the third of the EditTexts. Is there any way to push up the layout in the event that the soft keyboard is drawn?

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