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 <javascript:>>
>
>> 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).getBitmap();
>>
>> // Get current dimensions
>> int width = bitmap.getWidth();
>>
>> int height = bitmap.getHeight();
>>
>> LayoutParams params = new LayoutParams((int)(height/13.94),
>> (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.setLayoutParams(params);
>> }else if ( density == 1.5f ){
>>
>> ImageView micImage = ((ImageView)
>> findViewById(R.id.imageViewClk));
>>
>> Drawable drawing = micImage.getDrawable();
>> Bitmap bitmap = ((BitmapDrawable)drawing).getBitmap();
>>
>> int width = bitmap.getWidth();
>> int height = bitmap.getHeight();
>>
>> LayoutParams params = new
>> LayoutParams((int)Math.round(height/14.13), (int)Math.round(height/14.13));
>>
>> params.setMargins((int)Math.round( 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.setLayoutParams(params);
>> }else if ( density == 0.75f ){
>>
>> ImageView micImage = ((ImageView)
>> findViewById(R.id.imageViewClk));
>>
>> Drawable drawing = micImage.getDrawable();
>> Bitmap bitmap = ((BitmapDrawable)drawing).getBitmap();
>>
>> // Get current dimensions
>> int width = bitmap.getWidth();
>>
>> int height = bitmap.getHeight();
>>
>> LayoutParams params = new LayoutParams((int)(height/14.88),
>> (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.setLayoutParams(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).getBitmap();
>>
>> // Get current dimensions
>> int width = bitmap.getWidth();
>>
>> int height = bitmap.getHeight();
>>
>> LayoutParams params = new LayoutParams((int)(height/13.94),
>> (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.setLayoutParams(params);
>> }else if ( density == 1.5f ){
>>
>> ImageView micImage = ((ImageView)
>> findViewById(R.id.imageViewClk));
>>
>> Drawable drawing = micImage.getDrawable();
>> Bitmap bitmap = ((BitmapDrawable)drawing).getBitmap();
>>
>> int width = bitmap.getWidth();
>> int height = bitmap.getHeight();
>>
>> LayoutParams params = new
>> LayoutParams((int)Math.round(height/14.13), (int)Math.round(height/14.13));
>>
>> params.setMargins((int)Math.round( 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.setLayoutParams(params);
>> }else if ( density == 0.75f ){
>>
>> ImageView micImage = ((ImageView)
>> findViewById(R.id.imageViewClk));
>>
>> Drawable drawing = micImage.getDrawable();
>> Bitmap bitmap = ((BitmapDrawable)drawing).getBitmap();
>>
>> // Get current dimensions
>> int width = bitmap.getWidth();
>>
>> int height = bitmap.getHeight();
>>
>> LayoutParams params = new LayoutParams((int)(height/14.88),
>> (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.setLayoutParams(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/cloking"
>>
>> android:id="@+id/imageViewClk"
>> android:layout_height="wrap_content"
>> android:layout_width="wrap_content"
>>
>> android:layout_centerHorizontal="true"
>> android:layout_above="@+id/imageViewProcess"
>> android:adjustViewBounds="true"
>>
>> android:cropToPadding="false"
>> android:layout_marginTop="60dp"
>> android:scaleType="fitXY">
>> </ImageView>
>>
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>
>
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