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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