Re: [android-developers] Listview notification?

I can't call rotateThumbnail directly from getView as it is the result
of an onClick from one of the buttons also in the view for that item.

The ImageView that is rotated is from the array that the list view uses.

On 02/07/2011 2:42 PM, Mark Murphy wrote:
> You are not calling rotateThumbnail() in getView().
>
> On Sat, Jul 2, 2011 at 9:39 AM, Simon Platten
> <simonaplatten@googlemail.com> wrote:
>> I believe thats exactly what I'm doing:
>>
>> public View getView(int position,
>> View convertView,
>> ViewGroup parent) {
>> View v = convertView;
>>
>> if (v == null) {
>> LayoutInflater vi =
>> (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);
>> v = vi.inflate(R.layout.lvimages, null);
>> }
>> imgFile ii = m_aryImages.get( position );
>>
>> if ( ii != null ) {
>> Bitmap bmpData = BitmapFactory.decodeFile(ii.getFilename());
>> int intScaledWidth = clsWallpaper.m_intScrWidth / 2;
>> float fltAspectRatio = (float)bmpData.getHeight() /
>> (float)bmpData.getWidth();
>> int intScaledHeight = (int)((float)intScaledWidth *
>> fltAspectRatio);
>> Bitmap bmpResized = Bitmap.createScaledBitmap( bmpData,
>>
>> intScaledWidth,
>>
>> intScaledHeight,
>> false );
>> Drawable drwThumbnail = new BitmapDrawable(bmpResized);
>> ImageView ivThumbnail =
>> (ImageView)v.findViewById(R.id.ivthumbNail);
>> ivThumbnail.setBackgroundDrawable(drwThumbnail);
>> ii.setThumbnail(ivThumbnail);
>> // Get the image file name
>> TextView tvFilename =
>> (TextView)v.findViewById(R.id.tvFilename);
>> // Remove the path from the file name
>> String strFile = ii.getFilename();
>> int intIdx = strFile.lastIndexOf(File.separator);
>>
>> if ( intIdx>= 0 ) {
>> strFile = strFile.substring( intIdx + 1 );
>> }
>> tvFilename.setText(strFile);
>> // Rotation images
>> ii.setIndex( position );
>> ii.setupCCW(v.findViewById(R.id.btnCCW));
>> ii.setupCW(v.findViewById(R.id.btnCW));
>> }
>> return v;
>> }
>>
>> The methods setupCCW and setupCW add listeners to the buttons:
>>
>> public void setupCCW(View v) {
>> m_ibtnCCW = (ImageButton)v;
>>
>> m_ibtnCCW.setOnClickListener(new OnClickListener() {
>> @Override
>> public void onClick(View v) {
>> try{
>> rotateThumbnail(ROTATE_CCW);
>> } catch( Exception ex ) {
>> Log.e( TAG, "setOnClickListener", ex );
>> }
>> }
>> });
>> }
>>
>> Here is the code for rotateThumbnail():
>>
>> public void rotateThumbnail(int intRotation) {
>> try{
>> if ( intRotation == ROTATE_CW ) {
>> m_intAngle = 90;
>> } else if ( intRotation == ROTATE_CCW ) {
>> m_intAngle = -90;
>> }
>> if ( m_intAngle != 0 ) {
>> // Rotating Bitmap
>> Drawable drwImg = m_ivThumbnail.getBackground();
>> Bitmap bmpThumbnail = ((BitmapDrawable)drwImg).getBitmap();
>> Matrix mtx = new Matrix();
>> mtx.setRotate(m_intAngle,
>> bmpThumbnail.getWidth() / 2,
>> bmpThumbnail.getHeight() / 2);
>> bmpThumbnail = Bitmap.createBitmap(bmpThumbnail,
>> 0, 0,
>> bmpThumbnail.getWidth(),
>> bmpThumbnail.getHeight(),
>> mtx, true);
>> Drawable drwRotated = new BitmapDrawable(bmpThumbnail);
>> m_ivThumbnail.setBackgroundDrawable(drwRotated);
>>
>> if ( m_intAngle< 0&& m_intTotalAngle == 0 ) {
>> m_intTotalAngle = 360;
>> }
>> m_intTotalAngle = (m_intTotalAngle + m_intAngle) % 360;
>> }
>> } catch( Exception ex ) {
>> Log.e( TAG, "rotateThumbnail", ex );
>> }
>> }
>>
>>
>> As I said in my first post when the buttons are pressed the image is
>> rotated, but it reverts back to its original state when it goes out of view.
>>
>>
>> On 02/07/2011 2:20 PM, Mark Murphy wrote:
>>> On Sat, Jul 2, 2011 at 9:07 AM, Simon Platten
>>> <simonaplatten@googlemail.com> wrote:
>>>> I have a listview which has an ImageView in each item and a couple of
>>>> buttons. The buttons allow the user to rotate the image clockwise and
>>>> counter clockwise by 90 degrees on each press. This works find and the
>>>> ImageView is rotated, however if I scroll the item off view, when I
>>>> scroll
>>>> it back into view the orginal image is restored without any rotation
>>>> applied, is there a notification that I can get when the item comes into
>>>> view so I can correct the image
>>> You are already overriding getView(), presumably. That is where you
>>> apply your rotation.
>>>
>>>> or....can I modifiy the original ImageView
>>>> in the list view directly?
>>> You are already overriding getView(), presumably. That is where you
>>> are modifying "the original ImageView", so that is where you apply
>>> your rotation.
>>>
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>
>

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