Android :: Measuring Text Width To Be Drawn On Canvas
Jul 15, 2010Is 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, 2010Any 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 RelatedAndroid :: Gradient Drawn On Canvas Looks Banded / What To Fix
Sep 23, 2010I 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 RelatedAndroid :: Rotate Particular Image Among Multiple Images Drawn To Canvas In Droid
Jun 16, 2010I 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).
Android :: Show Shadow For Text Drawn On Google Map
Jun 7, 2010In 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 RelatedAndroid :: Draw Text On Canvas?
Oct 28, 2010i'm trying to develop a simple pie chart class for android. For now, it can take a map of labels and values and draw the pie chart. I'm yet to add the legends for the pie, which is where i need to place the texts near small rectangles on the screen corner. Any help appreciated, since i'm new to Android dev.
View 1 Replies View RelatedAndroid : How To Set A Dialog Themed Activity Width To Screen Width?
Jun 2, 2010I am followin the method described here to create an EditText input activity. But the view doesn't fill the width of the screen. How can I tell to fit the screen width?
View 3 Replies View RelatedAndroid :: Using StaticLayout With Canvas To Draw Text
Feb 4, 2010I have figured out the static layout this far, but I have no idea how to make it display my text anywhere else but in the top left corner. StaticLayout layout = new StaticLayout(text, getTextPaint(), 140, android.text.Layout.Alignment.ALIGN_CENTER,(float)1.0, (float)0.0, true); layout.draw(canvas);
View 2 Replies View RelatedAndroid :: Not Getting Complete Text While Animation On Canvas
Nov 16, 2010I want to get an animated text in Android where it should run from left to right on the screen.
Eg: I want to get this text. private static final String QUOTE = "Nobody uses Java anymore. It's this big heavyweight ball and chain.";
running from right to left using animation.
However, this text gets truncated to "Nobody uses Java anymore. It's" in Portrait mode and to "Nobody uses Java anymore. It's this big heavyweight" in landscape mode.
This is the code that I have used:
CODE:......................
Android :: How To Set Width Of Buttons To Cover Screen Width?
Mar 1, 2010i have three button in linear layout with width fill_parentnow how can i set width of these buttons to cover whole screen area equally?
View 2 Replies View RelatedAndroid :: How To Write Centered Multi Colored Text To Canvas
Sep 10, 2010I am writing to a canvas from a thread.
public void draw(Canvas canvas) {
Paint p = new Paint();
p.setAntiAlias(true);
p.setTextSize(30);
p.setColor(Color.WHITE);
p.setTextAlign(Paint.Align.CENTER);
canvas.drawText("Centered", xCentre, yCentre, p);
}
My problem start when I have a multi colored SpannableStringBuilder which I want to write to the canvas, and I have no idea how to do this. SpannableStringBuilder has a drawText() method which I have been unable to use. Or is there some other method to write a string to a canvas where some of the letters have a different color?
Android :: Drawing Text In Custom View Using Canvas.drawtext
Jul 19, 2010I am drawing text in my custom view in android using canvas.drawtext. i need to change back color, and want text right aligned. for example i want to print the text in a 10, 10, 100, 20 rectangle of color yellow and text color red and right aligned. how can i do that ?
View 2 Replies View RelatedAndroid :: Drawing Word-wrapped Text At Arbitrary Position On A Canvas
Jan 16, 2010I believe I know the basics and have successfully published a nice graphical game (Tairu). I know about inflating an xml layout and instantiating views that work.
For my current project, I really just want something similar to the Windows 'DrawText' function where it will draw a bit of a text inside an arbitrary rectangle of the surface, and do word wrap within that rectangles boundaries. That's what I really WANT, but I can't find any form of drawText that will wrap.
So, while that's what I WANT, I can accept the thought of programmatically instantiating a TextView (which wraps beautifully). But I still need to be able to provide the rectangle, which is highly dynamic. (which is why I want to call a form of drawText inside of my onDraw method). In this particular case, I have something which is static to a particular view instance (I mean, the View becomes visible, the position is set, and does not change after that. but the text position is dependent on game state and cannot be pre-determined inside an XML layout). So in this one case, I could afford the expense of runtime recalculation of the layout when the view is displayed.
OK, fine. So I do something like this:
CODE:......
Pretend you didn't see 'AbsoluteLayout' there, I am desperate and have tried all possible layout classes
main_frame is defined in my main XML layout (it is the outermost layout, fills the parent, and, as I said, I've tried all the offered layouts)
With this code, the textView appears, but along the top of the layout, and not using the width I provided either.
Adding, out of desperation.
CODE:.......
makes no difference. In fact, so far, NOTHING has made any difference. So I thought, ok, while this seems like a useful thing to be able to do, I can accept if it can't. I accept that it is impossible to provide dimensions in advance and that you have to override the measure and layout callbacks then requestLayout and in your overrides, force the final layout for the TextView.
Of course, that is completely unacceptable for my FIRST desire (a drawText that wraps to a rectangle, called from onDraw as needed). But the point is I feel something like that OUGHT to work, and it doesn't, so clearly this is MY fault.
Getting back to what I WANT, I guess I can do it myself by repeated calls to measure text and parsing the string for spaces until I get the N characters which fit on the first line, then repeat for additional lines, calling a normal drawText for each line (and using textMetrics to determine the vertical offset to the next line.)
But why wouldn't that method already exist? I promise not to fill the screen with a zillion calls, and/or to cache pre-rendered text on some bitmap somewhere if antialiased drawText is too expensive to repeat frequently.
Android :: Reset Canvas - Draw A New Bitmap Into The Canvas
Jul 7, 2010My loadMap() method generate a canvas.throwIfRecycled exception when i try to load a new map.
When i start the game, the initial map loads and work fine though,
its only when i try to load a new map that i get the exception ..
How can i "reset" canvas and the bitmap i use to draw into, so i can startover fresh with them ?
here's what i use to create and draw my maps:
CODE:.........
So basicaly once i created and used picDest and canvas, i cannot figure how to reset it all for when i want to load a new map..
Android :: Measuring A View Before Rendering It
May 13, 2010I need to find out how big a view will be after attaching it to its parent.I have overridden this method: Do you think there is a way to get this information before rendering the view itself? Basically I need to know the actually size before attaching it and not attach the view at all if it would take more certain amount of space. Code...
View 2 Replies View RelatedAndroid :: Measuring Real Phone Signal Strength On Mobil?
Dec 4, 2009I want to programmatically measure the phone signal strength in a mobile phone. I don't actually care about the mobile phone or the programming environment: It can be based on android or windows mobile or even J2ME and can be from any manufacturer (please no iPhone). However, it needs to be a real, commercial mobile phone and not a special measurement device. This problem is not as easy as it seems with a first look. I am aware that there already exist a number of methods that claim to return the phone signal strength. Some of these are:
SystemState.PhoneSignalStrength for WM6 RIL_GetCellTowerInfo for WinCe (dwRxLevel member of returned RILCELLTOWERINFO struct) android.telephony.NeighboringCellInfo.getRssi() for android
The problem with the above is that they only return a few (under 10) discrete values, meaning that, for instance, the return values of SystemState.PhoneSignalStrength can only be translated to (for instance) -100 dbm, -90 dbm, -80 dbm, -70 dbm and -60 dbm, something that is not useful for my application, since I'd like to have as much precision as possible. It doesn't matter if there is an undocumented solution that only works on only one phone
Android :: Default Measuring Units Pixels / Density Independent
Aug 13, 2009in xml file we can define measuring units along with the values. If I want to set some property through code it only takes "int" value. What is the default unit for this int? px(pixels) or dp(density independent pixels) ?
View 7 Replies View RelatedGeneral :: Measuring Battery By MV?
Mar 13, 2012I have a 3500 mAH battery that refuses to calibrate.... Anyways when I use Battery Calibrate, its says my current mV is 3643, I know that isn't full, but my battery percent says 23% and that is much to low for 3643mV! My co-worker said to divide 3643 by 4200 (Full charge IIRC) and that is my battery percent. I think there has to be a better way...
View 1 Replies View RelatedHTC Incredible :: Measuring Battery Life
May 24, 2010Just tested my battery (stock) vs my new battery (1750). I got about 4.5 hours running my stock battery down to 25% or so and I'm now at about 6.5 hours running the 1750 down to 27%. When people talk about measuring battery life are they talking about 100%-0% or are they just talking about just 100%-20% or so. This is really the only usable battery range because the radio turns off somewhere under the 20% point. I'm also thinking that my Seidio battery isn't working properly. It was kind of bent out of shape when I got it and felt pretty filmsy. I decided to give it a try but now I'm kind of thinking about returning it in the hopes of getting better life out of a new one.So two questions here what range are you all measuring your battery life through? and any chance that Il' get more life out of a new battery?
View 16 Replies View RelatedAndroid :: Gallery Item Width Vs Gallery Width
Jan 10, 2010I have a Gallery with a set of images that was downloaded at run time.I followed the example here:http://www.anddev.org/a_androidwidgetgallery_-_example-t332.html but instead of using i.setImageResource(this.myImageIds[position]);I used i.setImageBitmap(bitmaps.get(position));This doesn't fill the entire width of the screen, only as much as the width specified here:i.setLayoutParams(new Gallery.LayoutParams(150, 150)); When I increase this number, the item scales with it instead of showing more images per the example. I've even tried to scale the images before adding them to the set. Not sure what I'm missing, or where other examples of this might be. Any help would be great.
View 1 Replies View RelatedAndroid :: Overlays Drawn On The Map
Jul 17, 2010What 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.
Android :: OpenGl Drawn Something?
May 10, 2010glReadPixels is too slow, so I need another way. Without testing object by object, Is there any other way?
View 7 Replies View RelatedAndroid :: Use SurfaceView Properly , Nothing Is Drawn
May 31, 2009I 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 RelatedAndroid :: Does A RemoteView Get Drawn On Screen?
Apr 28, 2009From 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?
Android :: Able To Get Current OverlayItem Being Drawn
Jul 8, 2010I 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 :: Implement Dynamically Drawn Content?
Feb 2, 2010Based 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?
Android :: Get Bitmap Data Before It Is Drawn On Screen
Feb 22, 2010To 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?
Android :: GLSurfaceView Swaps 2D Bitmaps Being Drawn / Cause Of This Can Be?
Sep 8, 2010I 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...
Android :: Taking Screen Shot Of Whatever Is Drawn On View
Oct 28, 2009I 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 RelatedAndroid :: Why Force Close Before Activity Screen Is Drawn?
Jun 29, 2010My 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.