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?
View 2 Replies
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?
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?
View 3 Replies View RelatedMy 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.
I am not sure why this is not working and I can not find any answers here or after an extensive Google search. I have an app widget and I'd like to add views, (textview, etc.,) to the remoteview but it never shows up.
Here's the code:
CODE:......
This is what I ended up doing:
CODE:...................
Doing "edu.sju.BlackJack" Is not causing updates that are later called to occur. I reference the layout correctly and the calls that are supposed to update it are correct, so what do I put in for the package name?
I should add that my package name according to the manifest is the above. This is the code I have now which currently doesn't update the screen (or i'm guessing change the value correctly). RemoteViews name = new RemoteViews("edu.sju.BlackJack", R.layout.play_screen);
If that's not it.. would it then be this code? name.setTextViewText(R.id.Dealer_Total, "0");
Dealer_Total is the id for the TextView that I want to change.. however again the Change is not occurring.
Here is the whole of my code that i'm talking about, first Playscreen.java
CODE:........
More buttons go here (if any)
Now here's the GameEngine Thread
Not the Whole of it, just enough so you get the idea
CODE:................
Over the past few days I have been trying to implement custom widget functionality. In this case I have instantiated a RemoteView containing some TextViews and an ImageView in one application's BroadcastReceiver. The BroadcastReceiver receives the intent signaling it to send the RemoteView to the calling application. When the calling application receives this RemoteView it uses apply to inflate the view properly and display it on the screen.
The problem occurs when the activity changes, the inflated RemoteView occasionally has information disappear. One time the image even changed into another image from a drawable located in the BroadcastReceiver's application. Has anyone else experienced a similar problem and/or have a solution?
I have looked at posts concerning ImageViews in widget use and orientation changes. Is this problem related? I am not entirely sure. I am currently running Android 1.5 SDK and am not able to upgrade for this side project of mine.
I have seen that the ImageView.setImageBitmap() can process high resolution images(even of size greater than 480x640), but RemoteView.setImageViewBitmap() fails with FAILED BINDER TRANSCATION error !!!!
Is there ary constraint on the bitmap size which RemoteView can handle ???? Why is the difference in the behaviour ?
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.
glReadPixels is too slow, so I need another way. Without testing object by object, Is there any other way?
View 7 Replies View RelatedI 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...
View 3 Replies View RelatedI 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....
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?
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...
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.
View 2 Replies View RelatedI'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?
View 1 Replies View RelatedIs 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.
View 1 Replies View RelatedAny 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.
View 1 Replies View RelatedI 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?
View 4 Replies View RelatedIn 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?
View 4 Replies View RelatedI 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.
View 1 Replies View RelatedI 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?
View 2 Replies View RelatedI 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?
View 1 Replies View RelatedI made a "GraphBar" custom view that is a RelativeLayout with a TextView on the bottom and an ImageView, varying in height, above that. Here is the code...
I've found it's probably a bug. The workaround should be, again, calling requestLayout(). Still i don't understand where i can put the call.
This is really frustrating, I am trying to get a carriage return drawn in my custom view and nothing is working. I have tried 'System.getProperty("line.separator")' but that makes it say null and I have tried '
' and '
' and those just both draw a little square. I am using the canvas.drawText meathod.
I need a small help on rotating one image around its center of axis among multiple images which are drawn to canvas in android.
I am loading images to canvas like below.
canvas.drawBitmap(mMachineBackground, 0, 0, null);
canvas.drawBitmap(mMachineRotator, 0, 0, null);
I want to rotate only the second bitmap around its center of axis instead of rotating the entire canvas(which includes first bitmap also).
recommend an app that lets u transcribe words drawn with your finger into text?
View 4 Replies View RelatedI have a simple draw application on Canvas. User should be able to draw with a chosen color. On MotionEvent.ACTION_UP, invalidate() is called. Now it redraws previously drawn lines with the current color ( Redrawing the entire drawing with the current color). I do not want to change the color of previously drawn lines. I am not sure what is missing. Can I make it redraw only newly drawn lines?
View 4 Replies View RelatedMy friend bought used sony Ericsson X10 too and he has probem that he have entered wrong drawn for the pattern and his phone looked now, even he doesn't know the email and the password of it to open phone again.
View 1 Replies View RelatedI am designing a home screen widget. I ran this widget on a HTC Hero device, which has a screen of 320 pixels * 480 pixels with mdpi. It ran perfect on HTC Hero. The widget takes 3 cells * 2 cells space, i.e. 240 pixels * 200 pixels.Then I ran this widget on a Nexus One device, which has a screen of 480 pixels * 800 pixels, mdpi. Since Nexus One also is mdpi, so I though 240dip is equivalent to 240 pixels on Nexus One and 200dip is equivalent to 200 pixels on Nexus One, so the widget will not take 3 cells * 2 cells space on Nexus One device. To my surprise, when running on Nexus One device, the widget take exact 3 cells * 2 cells, about 360 pixels * 300 pixels, on Nexus One device.I am confused. The layout xml above specifies 240dip in width and 200dip in height for the widget, but why did it take 360 pixels * 300 pixels on Nexus One Device? What am I missing?
View 2 Replies View Related