Re: [android-developers] Re: Listview oddity with imageview
I wish I could say it helped but it hasn't. On Sat, Jul 23, 2011 at 1:27 AM, Abhishek Akhani abhishek.akh...@gmail.comwrote: invalidate the view after rotating... hope this may help... -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -- Regards, Sy -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
Re: [android-developers] Re: Listview oddity with imageview
Try setting a scaleType property on the ImageView, perhaps you can get
consistent results that way.
2011/7/23 Simon Platten simonaplat...@googlemail.com:
Is this a bug or is there a property that needs setting ?
On Fri, Jul 22, 2011 at 7:27 AM, Simon Platten
simonaplat...@googlemail.com wrote:
Has anyone else encountered this problem?
On Thu, Jul 21, 2011 at 7:54 PM, Simon Platten
simonaplat...@googlemail.com wrote:
I have a listview with each item defined as:
?xml version=1.0 encoding=utf-8?
RelativeLayout
xmlns:android=http://schemas.android.com/apk/res/android;
android:layout_width=fill_parent
android:layout_height=?android:attr/listPreferredItemHeight
android:padding=10dp
LinearLayout android:id=@+id/llHeader
android:background=@color/blue
android:orientation=vertical
android:layout_alignParentTop=true
android:layout_width=fill_parent
android:layout_height=fill_parent
CheckBox android:id=@+id/chkUse
android:text=File-name
android:textColor=@color/yellow
android:textStyle=bold
android:layout_width=fill_parent
android:layout_height=wrap_content
android:layout_gravity=left /
/LinearLayout
ImageView android:id=@+id/ivthumbNail
android:src=@drawable/placeholder
android:layout_centerHorizontal=true
android:layout_below=@+id/llHeader
android:layout_width=fill_parent
android:layout_height=fill_parent /
ImageButton android:id=@+id/btnCCW
android:src=@drawable/ccw_rotate_btn
android:layout_alignLeft=@+id/llHeader
android:layout_below=@+id/llHeader
android:layout_width=48dip
android:layout_height=48dip /
ImageButton android:id=@+id/btnCW
android:src=@drawable/cw_rotate_btn
android:layout_alignRight=@+id/llHeader
android:layout_below=@+id/llHeader
android:layout_width=48dip
android:layout_height=48dip /
/RelativeLayout
This gives a title / checkbox, under this is an imageview with a button
either side of it. With the buttons I can rotate the image clockwise or
counter clockwise by 90 degrees, the routine that performs the rotation and
scaling of the images:
public Bitmap scaleAndRotateImage(boolean blnShow) {
try{
BitmapFactory.Options bfo = new BitmapFactory.Options();
bfo.inSampleSize = 4;
Bitmap bmpData = BitmapFactory.decodeFile(m_strFilename,
bfo);
if ( m_intOriginalWidth == 0 m_intOriginalHeight == 0 ) {
m_intOriginalWidth = bmpData.getWidth();
m_intOriginalHeight = bmpData.getHeight();
int intScaledWidth = clsWallpaper.m_intScrWidth;
float fltAspectRatio = (float)bmpData.getHeight() /
(float)bmpData.getWidth();
int intScaledHeight = (int)((float)intScaledWidth *
fltAspectRatio);
m_fltScaleWidth = ((float)intScaledWidth) /
((float)m_intOriginalWidth);
m_fltScaleHeight = ((float)intScaledHeight) /
((float)m_intOriginalHeight);
}
// Apply the scale to the matrix
Matrix mtx = new Matrix();
mtx.postScale(m_fltScaleWidth, m_fltScaleHeight);
// Apply the rotation angle to the matrix
mtx.postRotate(m_intTotalAngle);
// Get the scaled and maybe rotated version of the bitmap
Bitmap bmpScaled = Bitmap.createBitmap(bmpData,
0, 0,
m_intOriginalWidth,
m_intOriginalHeight,
mtx, true);
if ( blnShow == true bmpScaled != null ) {
m_drwThumbnail = new BitmapDrawable(bmpScaled);
Activity a = (Activity)m_ivThumbnail.getContext();
a.runOnUiThread(updateThumbnail);
}
return bmpScaled;
} catch( Exception ex ) {
Log.e( TAG, rotateThumbnail, ex );
}
return null;
}
The strange this is when the image is rotated the scaled version is
smaller than it is supposed to be, if I scroll the listview so the item goes
out of view then scroll it back into view the item comes back with the image
of the correct size. Is they're anything I can do about this?
--
Regards,
Sy
--
Regards,
Sy
--
Regards,
Sy
--
You received this message because you are subscribed to the
Re: [android-developers] Re: Listview oddity with imageview
I've tried all the scale type options, no effect, except that it fixes
the width and the height doesn't scale correctly.
It works exactly as I would expect in the emulator, when on my phone it
shrinks after rotation, but if I scroll out of view then back into view
its ok...very strange.
On 22/07/2011 9:45 PM, Kostya Vasilyev wrote:
Try setting a scaleType property on the ImageView, perhaps you can get
consistent results that way.
2011/7/23 Simon Plattensimonaplat...@googlemail.com:
Is this a bug or is there a property that needs setting ?
On Fri, Jul 22, 2011 at 7:27 AM, Simon Platten
simonaplat...@googlemail.com wrote:
Has anyone else encountered this problem?
On Thu, Jul 21, 2011 at 7:54 PM, Simon Platten
simonaplat...@googlemail.com wrote:
I have a listview with each item defined as:
?xml version=1.0 encoding=utf-8?
RelativeLayout
xmlns:android=http://schemas.android.com/apk/res/android;
android:layout_width=fill_parent
android:layout_height=?android:attr/listPreferredItemHeight
android:padding=10dp
LinearLayout android:id=@+id/llHeader
android:background=@color/blue
android:orientation=vertical
android:layout_alignParentTop=true
android:layout_width=fill_parent
android:layout_height=fill_parent
CheckBox android:id=@+id/chkUse
android:text=File-name
android:textColor=@color/yellow
android:textStyle=bold
android:layout_width=fill_parent
android:layout_height=wrap_content
android:layout_gravity=left /
/LinearLayout
ImageView android:id=@+id/ivthumbNail
android:src=@drawable/placeholder
android:layout_centerHorizontal=true
android:layout_below=@+id/llHeader
android:layout_width=fill_parent
android:layout_height=fill_parent /
ImageButton android:id=@+id/btnCCW
android:src=@drawable/ccw_rotate_btn
android:layout_alignLeft=@+id/llHeader
android:layout_below=@+id/llHeader
android:layout_width=48dip
android:layout_height=48dip /
ImageButton android:id=@+id/btnCW
android:src=@drawable/cw_rotate_btn
android:layout_alignRight=@+id/llHeader
android:layout_below=@+id/llHeader
android:layout_width=48dip
android:layout_height=48dip /
/RelativeLayout
This gives a title / checkbox, under this is an imageview with a button
either side of it. With the buttons I can rotate the image clockwise or
counter clockwise by 90 degrees, the routine that performs the rotation and
scaling of the images:
public Bitmap scaleAndRotateImage(boolean blnShow) {
try{
BitmapFactory.Options bfo = new BitmapFactory.Options();
bfo.inSampleSize = 4;
Bitmap bmpData = BitmapFactory.decodeFile(m_strFilename,
bfo);
if ( m_intOriginalWidth == 0 m_intOriginalHeight == 0 ) {
m_intOriginalWidth = bmpData.getWidth();
m_intOriginalHeight = bmpData.getHeight();
int intScaledWidth = clsWallpaper.m_intScrWidth;
float fltAspectRatio = (float)bmpData.getHeight() /
(float)bmpData.getWidth();
int intScaledHeight = (int)((float)intScaledWidth *
fltAspectRatio);
m_fltScaleWidth = ((float)intScaledWidth) /
((float)m_intOriginalWidth);
m_fltScaleHeight = ((float)intScaledHeight) /
((float)m_intOriginalHeight);
}
// Apply the scale to the matrix
Matrix mtx = new Matrix();
mtx.postScale(m_fltScaleWidth, m_fltScaleHeight);
// Apply the rotation angle to the matrix
mtx.postRotate(m_intTotalAngle);
// Get the scaled and maybe rotated version of the bitmap
Bitmap bmpScaled = Bitmap.createBitmap(bmpData,
0, 0,
m_intOriginalWidth,
m_intOriginalHeight,
mtx, true);
if ( blnShow == true bmpScaled != null ) {
m_drwThumbnail = new BitmapDrawable(bmpScaled);
Activity a = (Activity)m_ivThumbnail.getContext();
a.runOnUiThread(updateThumbnail);
}
return bmpScaled;
} catch( Exception ex ) {
Log.e( TAG, rotateThumbnail, ex );
}
return null;
}
The strange this is when the image is rotated the scaled version is
smaller than it is supposed to
Re: [android-developers] Re: Listview oddity with imageview
Your second paragraph below sounds like a view recycling issue. The emulator and real devices may have some differences there. -- Kostya 23.07.2011 0:54, Simon Platten пишет: I've tried all the scale type options, no effect, except that it fixes the width and the height doesn't scale correctly. It works exactly as I would expect in the emulator, when on my phone it shrinks after rotation, but if I scroll out of view then back into view its ok...very strange. -- Kostya Vasilyev -- You received this message because you are subscribed to the Google Groups Android Developers group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
