You MUST NOT touch Views from a background thread. This means calls to findViewById() and setImageBitmap() should not be running on the backgorund thread in your case. Also, you do not start() the thread and you always set the *same* image on the ImageView. I doubt you will see much difference :)
On Tue, Jun 16, 2009 at 1:38 AM, waterblood <[email protected]> wrote: > > Dear all, > > I cannot make postInvalidate() work in non-UI thread in sdk1.5. > Below are my code, let me know if i am wrong in some place. It is > supposed to update imageview every seconds. But it never be updated > from the bitmap. > > public class ThumbnailActivity extends Activity implements > OnClickListener{ > private static final String TAG = "FSL MM Thumbnail TEST"; > private Thread thumbnailThread; > private boolean thumbnailStoped = false; > > /** Called when the activity is first created. */ > @Override > public void onCreate(Bundle savedInstanceState) { > Log.i(TAG,"ThumbnailActivity onCreate"); > super.onCreate(savedInstanceState); > setContentView(R.layout.thumbnail); > > thumbnailStoped = false; > thumbnailThread = new Thread(new Runnable() { > public void run() { > Log.i(TAG,"***thumbnailThread run***"); > while(! thumbnailStoped ) { > Bitmap bitmap; > ImageView thumbimage; > thumbimage = (ImageView)findViewById > (R.id.thumbnail_image); > bitmap = BitmapFactory.decodeFile("/sdcard/ > some.jpeg"); > if(bitmap == null) > Log.i(TAG,"Error!not get bitmap > from .jpg"); > thumbimage.setImageBitmap(bitmap); > thumbimage.postInvalidate(); > > Log.i(TAG, "***thumbnailThread > continue running***"); > SystemClock.sleep > (1000); > } > }); > > > } > > } > > > the xml of layout as below: > > <?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="fill_parent"> > > <Button > android:id="@+id/thumbnail_autopreview_button" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:layout_alignParentLeft="true" > android:layout_marginTop="8dip" > android:layout_marginLeft="10dip" > android:text="Auto" > /> > > <Button > android:id="@+id/thumbnail_nextimage_button" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:layout_toRightOf="@id/thumbnail_autopreview_button" > android:layout_alignTop="@id/thumbnail_autopreview_button" > android:layout_marginLeft="10dip" > android:text="Next" > /> > > <Button > android:id="@+id/thumbnail_stoppreview_button" > android:layout_width="wrap_content" > android:layout_height="wrap_content" > android:layout_toRightOf="@id/thumbnail_nextimage_button" > android:layout_alignTop="@id/thumbnail_nextimage_button" > android:layout_marginLeft="10dip" > android:text="Stop" > /> > > <TextView > android:id="@+id/filename_label" > android:layout_width="fill_parent" > android:layout_height="wrap_content" > android:text="File: /sdcard/hello.mp4" > android:layout_below="@id/thumbnail_stoppreview_button" > /> > > <ImageView > android:id="@+id/thumbnail_image" > android:layout_width="fill_parent" > android:layout_height="fill_parent" > android:layout_marginLeft="4dip" > android:layout_marginRight="2dip" > android:layout_marginTop="8dip" > android:layout_below="@id/filename_label" > /> > </RelativeLayout> > > > Best Regards > Guoyin Chen > > > > -- Romain Guy Android framework engineer [email protected] Note: please don't send private questions to me, as I don't have time to provide private support. All such questions should be posted on public forums, where I and others can see and answer them --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
