In both onMeasure, onLayout of these when I set the Layout params to the
progress bar they seem to be ignored (the bar is not displayed at all).
skink: your code works but the matrix seems calculate the points before
resizing the image.
On Thursday, September 27, 2012 12:22:22 PM UTC+2, Kostya Vasilyev wrote:
>
> Yes, there are methods for measuring and positioning views. They are
> called onMeasure and onLayout, respectively...
>
> 2012/9/27 Serdel <adam.lich...@gmail.com <javascript:>>
>
>> I passed my progress bar object to my ImageView subclass but if I set the
>> layout params on the progress bar object they are not accepted (it is not
>> displayed at all). Of course in the xml file my custom image view is under
>> the progress bar so it is not covering it. So even If I do get the correct
>> resized parameters I can't use them to position my progress bar. Is there a
>> method in the main UI thread or inside my ImageView subclass that I can use
>> for that purpose?
>>
>>
>> On Thursday, September 27, 2012 11:26:49 AM UTC+2, Serdel wrote:
>>>
>>>
>>> "onMeasure may be called multiple times, yes."
>>>
>>> but why once with 480x817(so almost full screen) and 2nd time with
>>> 227x481 (the actual size that I want). Moreover I have noticed that it is
>>> called multiple times but always with this pair - first with almost
>>> fullscreen, 2nd correct. How can I filter to use only the 2nd one? I don't
>>> know the exact values that android can scale my image to.
>>>
>>>
>>> W dniu czwartek, 27 września 2012 11:23:16 UTC+2 użytkownik Kostya
>>> Vasilyev napisał:
>>>>
>>>> You're calling findViewById() on your image view object, which looks
>>>> among the view's children. Since the progress bar is not a child of your
>>>> image view, this returns null. Look in the activity instead, or have the
>>>> activity provide the progress bar to the image view, or -- that's how I'd
>>>> do it -- create a layout class that manages both image and progress views
>>>> as its children.
>>>>
>>>> onMeasure may be called multiple times, yes.
>>>>
>>>> -- K
>>>>
>>>> 2012/9/27 Serdel <adam.lich...@gmail.com>
>>>>
>>>>> Hi Kostya,
>>>>>
>>>>> I am not sure what is complicated here... I just want to place my
>>>>> progress bar in the exact location on my imageview. If do it 'hard coded'
>>>>> so i.e. the image is 200x400 and I place it 50px from left and 100px from
>>>>> bottom than it will be misplaced if the image is resized by android.
>>>>> Therefore I want to get new resized parameters so I can calculate my
>>>>> position dynamically not hard coded - it cannot be put more simple. I
>>>>> ahve
>>>>> now subclassed my ImageView on in the onMeasure I finally got the
>>>>> rescaled
>>>>> size. However inside that method I get null when I call:
>>>>>
>>>>> myCustomTwistedProgressBar = ((CustomTwistedProgressBar)
>>>>> findViewById(R.id.progressBar)**)
>>>>>
>>>>> Moreover I also need to get the screen density before placing my progress
>>>>> bar (I have different image sizes for different densities). So I am still
>>>>> stuck. I don't understand why is it soooooo difficult to get the rescaled
>>>>> dimensions of an imageView in android.
>>>>>
>>>>>
>>>>> Also one very strange thing is that my onMeasure is called a couple of
>>>>> times when the activity starts - first it seems that the image is spread
>>>>> (width and height are full screen values) and the 2nd time they are
>>>>> correct.
>>>>>
>>>>>
>>>>> W dniu środa, 26 września 2012 23:46:37 UTC+2 użytkownik Kostya
>>>>> Vasilyev napisał:
>>>>>>
>>>>>> Not sure what your requirements are, but the code below seems way too
>>>>>> complicated to me.
>>>>>>
>>>>>> Subclass ViewGroup, draw the image in onDraw, override onMeasure /
>>>>>> onLayout and position the progress bar (or skip the drawing and add an
>>>>>> image view as a child... you'd need to position it too...)
>>>>>>
>>>>>> -- K
>>>>>>
>>>>>> 2012/9/26 Serdel <adam.lich...@gmail.com>
>>>>>>
>>>>>>> The problem with properly handling multiple screen sizes on Android
>>>>>>> has been talked all over thousands of times. However I couldn't find a
>>>>>>> solution to m problem. In a nutshell I need to align my custom progress
>>>>>>> bar
>>>>>>> over an imageView. I've got 3 set of drawables for the imageView -
>>>>>>> ldpi(scaled for 240x400), mdpi(scaled for 320x480), hdpi(scaled for
>>>>>>> 480x800). I align my custom view in Java with the following code:
>>>>>>>
>>>>>>> //get screen density
>>>>>>> float density =
>>>>>>> getBaseContext().getResources(****).getDisplayMetrics().density;
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> //set the progress bar position according to screen density
>>>>>>> if ( density == 1.0f)
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> {
>>>>>>> ImageView micImage = ((ImageView)
>>>>>>> findViewById(R.id.imageViewClk****));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Drawable drawing = micImage.getDrawable();
>>>>>>> Bitmap bitmap = ((BitmapDrawable)drawing).getB****itmap();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> // Get current dimensions
>>>>>>> int width = bitmap.getWidth();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> int height = bitmap.getHeight();
>>>>>>>
>>>>>>> LayoutParams params = new
>>>>>>> LayoutParams((int)(height/13.**9**4), (int)(height/13.94));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.setMargins((int)(width/****2.30), 0, 0,
>>>>>>> (int)(height/2.75));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_LEFT,R.id.imageViewClk);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_BOTTOM,R.id.imageViewClk****);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> myCustomTwistedProgressBar.set****LayoutParams(params);
>>>>>>> }else if ( density == 1.5f ){
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ImageView micImage = ((ImageView)
>>>>>>> findViewById(R.id.imageViewClk****));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Drawable drawing = micImage.getDrawable();
>>>>>>> Bitmap bitmap = ((BitmapDrawable)drawing).getB****itmap();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> int width = bitmap.getWidth();
>>>>>>> int height = bitmap.getHeight();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> LayoutParams params = new
>>>>>>> LayoutParams((int)Math.round(h****eight/14.13),
>>>>>>> (int)Math.round(height/14.13))****;
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.setMargins((int)Math.ro****und( width/2.27), 0, 0,
>>>>>>> (int)Math.round(height/2.91));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_LEFT,R.id.imageViewClk);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_BOTTOM,R.id.imageViewClk****);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> myCustomTwistedProgressBar.set****LayoutParams(params);
>>>>>>> }else if ( density == 0.75f ){
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ImageView micImage = ((ImageView)
>>>>>>> findViewById(R.id.imageViewClk****));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Drawable drawing = micImage.getDrawable();
>>>>>>> Bitmap bitmap = ((BitmapDrawable)drawing).getB****itmap();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> // Get current dimensions
>>>>>>> int width = bitmap.getWidth();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> int height = bitmap.getHeight();
>>>>>>>
>>>>>>> LayoutParams params = new
>>>>>>> LayoutParams((int)(height/14.**8**8), (int)(height/14.88));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.setMargins((int)(width/****2.27), 0, 0,
>>>>>>> (int)(height/2.69));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_LEFT,R.id.imageViewClk);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_BOTTOM,R.id.imageViewClk****);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> myCustomTwistedProgressBar.set****LayoutParams(params);
>>>>>>> }
>>>>>>>
>>>>>>>
>>>>>>> The problem with properly handling multiple screen sizes on
>>>>>>> Android has been talked all over thousands of times. However I couldn't
>>>>>>> find a solution to m problem. In a nutshell I need to align my custom
>>>>>>> progress bar over an imageView. I've got 3 set of drawables for the
>>>>>>> imageView - ldpi(240x400), mdpi(320x480), hdpi(480x800). I align my
>>>>>>> custom
>>>>>>> view in Java with the following code:
>>>>>>>
>>>>>>> //get screen density
>>>>>>> float density =
>>>>>>> getBaseContext().getResources(****).getDisplayMetrics().density;
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> //set the progress bar position according to screen density
>>>>>>> if ( density == 1.0f)
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> {
>>>>>>> ImageView micImage = ((ImageView)
>>>>>>> findViewById(R.id.imageViewClk****));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Drawable drawing = micImage.getDrawable();
>>>>>>> Bitmap bitmap = ((BitmapDrawable)drawing).getB****itmap();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> // Get current dimensions
>>>>>>> int width = bitmap.getWidth();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> int height = bitmap.getHeight();
>>>>>>>
>>>>>>> LayoutParams params = new
>>>>>>> LayoutParams((int)(height/13.**9**4), (int)(height/13.94));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.setMargins((int)(width/****2.30), 0, 0,
>>>>>>> (int)(height/2.75));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_LEFT,R.id.imageViewClk);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_BOTTOM,R.id.imageViewClk****);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> myCustomTwistedProgressBar.set****LayoutParams(params);
>>>>>>> }else if ( density == 1.5f ){
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ImageView micImage = ((ImageView)
>>>>>>> findViewById(R.id.imageViewClk****));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Drawable drawing = micImage.getDrawable();
>>>>>>> Bitmap bitmap = ((BitmapDrawable)drawing).getB****itmap();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> int width = bitmap.getWidth();
>>>>>>> int height = bitmap.getHeight();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> LayoutParams params = new
>>>>>>> LayoutParams((int)Math.round(h****eight/14.13),
>>>>>>> (int)Math.round(height/14.13))****;
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.setMargins((int)Math.ro****und( width/2.27), 0, 0,
>>>>>>> (int)Math.round(height/2.91));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_LEFT,R.id.imageViewClk);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_BOTTOM,R.id.imageViewClk****);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> myCustomTwistedProgressBar.set****LayoutParams(params);
>>>>>>> }else if ( density == 0.75f ){
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> ImageView micImage = ((ImageView)
>>>>>>> findViewById(R.id.imageViewClk****));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> Drawable drawing = micImage.getDrawable();
>>>>>>> Bitmap bitmap = ((BitmapDrawable)drawing).getB****itmap();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> // Get current dimensions
>>>>>>> int width = bitmap.getWidth();
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> int height = bitmap.getHeight();
>>>>>>>
>>>>>>> LayoutParams params = new
>>>>>>> LayoutParams((int)(height/14.**8**8), (int)(height/14.88));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.setMargins((int)(width/****2.27), 0, 0,
>>>>>>> (int)(height/2.69));
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_LEFT,R.id.imageViewClk);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> params.addRule(RelativeLayout.****ALIGN_BOTTOM,R.id.imageViewClk****);
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> myCustomTwistedProgressBar.set****LayoutParams(params);
>>>>>>> }
>>>>>>>
>>>>>>> Everything worked fined on different screen sizes however when I
>>>>>>> tried to check on 480x854 resolution the vertical alignment of the
>>>>>>> custom
>>>>>>> view was incorrect. Checked with 480x800 on the same screen size and it
>>>>>>> again works. I than went for a big jump and checked in GalaxyTab and
>>>>>>> the
>>>>>>> horizontal and vertical alignments were wrong. Now my first though was
>>>>>>> that
>>>>>>> the bitmap width and height were the one of the image not the actual
>>>>>>> resized imageview. So I spent a lot of time on trying to get the real
>>>>>>> size
>>>>>>> of the imageview and even went for viewTreeObserver but the results
>>>>>>> were
>>>>>>> all the same - the correct, unchanged (unscaled?) bitmap size. So being
>>>>>>> positive that the problem is not here I couldn't get through further. I
>>>>>>> see
>>>>>>> 2 options here:
>>>>>>>
>>>>>>> -either I still can't get the true 'real' size of the imageview
>>>>>>> (although I think I have ruled this out by checking the size by adding
>>>>>>> listeners to biewTreeObserver)
>>>>>>> -or, although I get the right size and calculate the alignment
>>>>>>> parameters correctly, they are somehow 'incorrectly' (differently) used
>>>>>>> in
>>>>>>> the layout.
>>>>>>>
>>>>>>>
>>>>>>> Does anyone have an idea why the alignment is not working correctly?
>>>>>>>
>>>>>>> PS: as for the image view in layout xml file I have 2 configurations
>>>>>>> for long and notlong but this image has the same description in both:
>>>>>>>
>>>>>>> <ImageView
>>>>>>> android:src="@drawable/**clokin**g"
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> android:id="@+id/**imageViewClk**"
>>>>>>> android:layout_height="wrap_**c**ontent"
>>>>>>>
>>>>>>> android:layout_width="wrap_**co**ntent"
>>>>>>>
>>>>>>>
>>>>>>> android:layout_**centerHorizont**al="true"
>>>>>>> android:layout_above="@+id/**im**ageViewProcess"
>>>>>>>
>>>>>>>
>>>>>>> android:adjustViewBounds="**tru**e"
>>>>>>>
>>>>>>> android:cropToPadding="false"
>>>>>>> android:layout_marginTop="**60d**p"
>>>>>>> android:scaleType="fitXY">
>>>>>>>
>>>>>>>
>>>>>>> </ImageView>
>>>>>>>
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>>>>>>>
>>>>>>
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