rejoigne ce groupe pour une tres bonne formation a Android:
http://www.facebook.com/group.php?v=wall&gid=268882243055
2010/1/5 keith greene <keith.gre...@gmail.com>:
> Well, I don't have that code anymore, I moved on to trying to create the
> bitmaps programmatically. I can do that, but as I stated, I can't for the
> life of me, figure out how to position the 2 parts at all or control which
> one appears on top of the other. Here's the code I'm trying now:
>
> package com.kgreene.gauge;
>
> import android.app.Activity;
> import android.os.Bundle;
> import android.view.View;
> import android.widget.LinearLayout;
> import android.graphics.Bitmap;
> import android.graphics.BitmapFactory;
> import android.graphics.drawable.BitmapDrawable;
> import android.graphics.Matrix;
> import android.widget.ImageView;
> import android.widget.LinearLayout.LayoutParams;
> import android.widget.ImageView.ScaleType;
>
> public class gauge extends Activity {
> @Override
> public void onCreate(Bundle icicle) {
> super.onCreate(icicle);
> LinearLayout linLayout = new LinearLayout(this);
>
> Bitmap bmSpeedGauge = BitmapFactory.decodeResource(getResources(),
> R.drawable.speedo);
> BitmapDrawable sGauge = new BitmapDrawable(bmSpeedGauge);
>
> ImageView sgView = new ImageView(this);
>
> // set the Drawable on the ImageView
> sgView.setImageDrawable(sGauge);
>
> // center the Image
> sgView.setScaleType(ScaleType.CENTER);
>
> // load the origial BitMap
> Bitmap bmSpeedNeedle = BitmapFactory.decodeResource(getResources(),
> R.drawable.speed_needle);
>
> int width = bmSpeedNeedle.getWidth();
> int height = bmSpeedNeedle.getHeight();
> int newWidth = 48;
> int newHeight = 212;
>
> // calculate the scale - in this case = 0.4f
> float scaleWidth = ((float) newWidth) / width;
> float scaleHeight = ((float) newHeight) / height;
>
> // createa matrix for the manipulation
> Matrix matrix = new Matrix();
> // resize the bit map
> matrix.postScale(scaleWidth, scaleHeight);
> // rotate the Bitmap
> matrix.postRotate(45, 24, 180);
>
> // recreate the new Bitmap
> Bitmap rbmSpeedNeedle = Bitmap.createBitmap(bmSpeedNeedle, 0, 0,
> width, height, matrix, true);
>
> // make a Drawable from Bitmap to allow to set the BitMap
> // to the ImageView, ImageButton or what ever
> BitmapDrawable bmd = new BitmapDrawable(rbmSpeedNeedle);
>
> ImageView imageView = new ImageView(this);
>
> // set the Drawable on the ImageView
> imageView.setImageDrawable(bmd);
>
> // center the Image
> imageView.setScaleType(ScaleType.CENTER);
>
> // add sgView to the Layout
> linLayout.addView(sgView,
> new LinearLayout.LayoutParams(
> 433, 433
> )
> );
> // add ImageView to the Layout
> linLayout.addView(imageView,
> new LinearLayout.LayoutParams(
> 48, 212
> )
> );
>
> // set LinearLayout as ContentView
> setContentView(linLayout);
> }
> }
>
> Screenshot: http://kgreene.com/android/gauge.jpg
>
> As you can see, the needle is drawn to the right of the gauge face, and
> slightly underneath it.
> I realize that I shouldn't expect them to magically appear stacked properly
> because I'm not trying to position them at all, and that is part of the
> problem. I haven't seen anything that explains how to position or layer
> bitmaps at all, aside from very vague references to using linearLayout or
> gridLayout. Also note that I'm coming from a web development background, and
> this is my first experience with java of any kind. I'm used to being able to
> position things exactly where I want them, very easily, with CSS or
> javascript.
> Basically, I'm looking for the android equivalent of the css properties top,
> left and z-index.
>
> Also, if you can point me to an example of number 2 below (creating the
> elements in XML and then accessing them programmatically) that would be
> great, as that seems to be preferable to creating everything in code.
>
> Thanks,
> Keith
>
> On Mon, Jan 4, 2010 at 10:32 PM, Justin Anderson <janderson....@gmail.com>
> wrote:
>>
>> Please post your XML file and the code you are using to access the
>> different parts of it...
>>
>> ----------------------------------------------------------------------
>> There are only 10 types of people in the world...
>> Those who know binary and those who don't.
>> ----------------------------------------------------------------------
>>
>>
>> On Thu, Dec 31, 2009 at 1:09 PM, keith <keith.gre...@gmail.com> wrote:
>>>
>>> Hello all,
>>> I'm very new to android development, and I'm coming from a php/web
>>> development background. For my first exercise, I'm trying to draw a
>>> gauge face and a needle, and be able to rotate that needle to whatever
>>> direction I want (not dynamically, just by changing the angle in code
>>> and recompiling)
>>> I'm running into a problem that is 2-fold:
>>>
>>> 1, If I build the layout programmatically using LinearLayout, I can
>>> rotate the needle, but I cannot manage to get the needle to sit in the
>>> proper position on top of the gauge, in fact, I can't seem to be able
>>> to control the position of either image at all. I looked into using
>>> AbsoluteLayout, but that is depricated.
>>>
>>> 2. If I use the xml layout, I can position the gauge and needle
>>> exactly where I want them, but I cannot seem to access the needle
>>> programmatically to rotate it. I have tried setting android:@+id and
>>> using getById, but that doesn't do anything, although it doesn't throw
>>> an error either.
>>>
>>> Does anyone have any tips or references or examples on how to
>>> accomplish this seemingly easy task?
>>>
>>> Thanks,
>>> Keith
>>>
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>>
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>
>
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