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
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