[android-developers] Re: options menu problems with SurfaceView and ListView
I found the problem. The Lunar Lander template I was using overrode
onWindowFocusChanged which paused the SurfaceView while the background
threads getting images kept going. This caused everything to get out
of synch. The Lunar Lander is designed to take up the whole screen and
mine is not. I commented out the pause and everything works. Still
some issues with the ListView, but I think I can handle that. The
lesson here is to be sure you understand everything going on in a
template before using it.
Thanks
On Jul 7, 10:27 am, javelin21 dsma...@javelin21.com wrote:
In my application, I have extended SurfaceView and ListView. I create
a LinearLayout as below
mainForm = new LinearLayout(this);
mainForm.setOrientation(LinearLayout.VERTICAL);
mainForm.setLayoutParams(new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.FILL_PARENT));
I then add the SurfaceView and ListView to the mainForm and then
setContentView(mainForm);
I also override onPrepareOptionsMenu and call menu.clear() and then
dynamically create menus each time the menu button is pressed by the
user.
The application loads fine and the SurfaceView works fine as I
directly draw images to it in a sleep loop.
The ListView displays items and is desined to refreshed with new
items.
The options menu also displays once as well.
However, once the SurfaceView is running and the ListView is loaded, a
second call to onPrepareOptionsMenu by pressing the menu key disrupts
the SurfaceView drawing, causing it to get stuck on the last image it
was drawing. But the list view does refresh the adapter to change
content once. After that, the application is hung and the SurfaceView
keeps playing the same images in a random order.
I am using runOnUiThread to update the views in the mainForm
(LinearLayout) and the Lunar Landing template for the SurfaceView as
shown below
In Activity
public void ViewsUpdate() {
System.out.println(Before ViewsUpdate method);
runOnUiThread(new updateDoer());
}
public class updateDoer implements Runnable {
public updateDoer(){
}
public void run() {
contentDone2();
viewForm.invalidate();
//viewForm is where the ListView and other views are added
}
}
In SurfaceView
private void drawSurfaceView(){
Canvas c = null;
try {
c = mSurfaceHolder.lockCanvas(null);
synchronized (mSurfaceHolder) {
if (mMode == STATE_RUNNING)
doDraw(c);
}
} finally {
// do this in a finally so that if an exception is
thrown
// during the above, we don't leave the Surface in an
// inconsistent state
if (c != null) {
mSurfaceHolder.unlockCanvasAndPost(c);
}
}
}
I am at a loss as to why everything gets clobbered after the options
menu is built and displayed the second time.
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[android-developers] options menu problems with SurfaceView and ListView
In my application, I have extended SurfaceView and ListView. I create
a LinearLayout as below
mainForm = new LinearLayout(this);
mainForm.setOrientation(LinearLayout.VERTICAL);
mainForm.setLayoutParams(new LinearLayout.LayoutParams(
LinearLayout.LayoutParams.FILL_PARENT,
LinearLayout.LayoutParams.FILL_PARENT));
I then add the SurfaceView and ListView to the mainForm and then
setContentView(mainForm);
I also override onPrepareOptionsMenu and call menu.clear() and then
dynamically create menus each time the menu button is pressed by the
user.
The application loads fine and the SurfaceView works fine as I
directly draw images to it in a sleep loop.
The ListView displays items and is desined to refreshed with new
items.
The options menu also displays once as well.
However, once the SurfaceView is running and the ListView is loaded, a
second call to onPrepareOptionsMenu by pressing the menu key disrupts
the SurfaceView drawing, causing it to get stuck on the last image it
was drawing. But the list view does refresh the adapter to change
content once. After that, the application is hung and the SurfaceView
keeps playing the same images in a random order.
I am using runOnUiThread to update the views in the mainForm
(LinearLayout) and the Lunar Landing template for the SurfaceView as
shown below
In Activity
public void ViewsUpdate() {
System.out.println(Before ViewsUpdate method);
runOnUiThread(new updateDoer());
}
public class updateDoer implements Runnable {
public updateDoer(){
}
public void run() {
contentDone2();
viewForm.invalidate();
//viewForm is where the ListView and other views are added
}
}
In SurfaceView
private void drawSurfaceView(){
Canvas c = null;
try {
c = mSurfaceHolder.lockCanvas(null);
synchronized (mSurfaceHolder) {
if (mMode == STATE_RUNNING)
doDraw(c);
}
} finally {
// do this in a finally so that if an exception is
thrown
// during the above, we don't leave the Surface in an
// inconsistent state
if (c != null) {
mSurfaceHolder.unlockCanvasAndPost(c);
}
}
}
I am at a loss as to why everything gets clobbered after the options
menu is built and displayed the second time.
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