Tuesday, November 23, 2010

[android-developers] Problem with AnimationDrawable

Hello,

I have problems with AnimationDrawable which i use to animate a
'striped' gif file. In fact I have two animations that I want to use
in one activity (and they must be used in the same activity). Both
animation are build with 7 frames :

<?xml version="1.0" encoding="utf-8"?>
<animation-list xmlns:android="http://schemas.android.com/apk/res/
android"
android:id="@+id/analyse" android:oneshot="false">
<item android:drawable="@drawable/analyse_frame_0"
android:duration="50" />
<item android:drawable="@drawable/analyse_frame_1"
android:duration="50" />
<item android:drawable="@drawable/analyse_frame_2"
android:duration="50" />
<item android:drawable="@drawable/analyse_frame_3"
android:duration="50" />
<item android:drawable="@drawable/analyse_frame_4"
android:duration="50" />
<item android:drawable="@drawable/analyse_frame_5"
android:duration="50" />
<item android:drawable="@drawable/analyse_frame_6"
android:duration="50" />
</animation-list>

The second one is the same, just different files but also 7 frames.

In the onCrate() method of my activity I start the first animation and
launch a 15 second timer (the idea is that the first animation is
playing when the timer ticks). I use the following code:

//The onCreate method of the activity class.
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.third);

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

layout =
(LinearLayout)findViewById(R.id.widget40);
analyseImage = (ImageView)
findViewById(R.id.ImageView02);

analyseImage.setBackgroundResource(R.drawable.analyse_animation);

analyseAnimation = (AnimationDrawable)
analyseImage.getBackground();
analyseAnimation.start();

MyCount counter = new MyCount(15000,1000);.
counter.start();
}


Unfortunately this does not work. However when the timer finishes I
want to start a second animation and launch a seperate thread. And
this works - when I start the animation in the 'onFinish' method of
the timer, the animation starts properly:

//the onFinish() method of timer.
public void onFinish()
{

layout.setBackgroundResource(R.drawable.id_app4);


analyseImage .destroyDrawingCache();

analyseImage .setVisibility(View.GONE);

connectImage = (ImageView)
findViewById(R.id.ImageView02);

connectImage.setBackgroundResource(R.drawable.connect_animation);
connectAnimation =
(AnimationDrawable) analyseImage.getBackground();

connectAnimation.start();

startThread(connectTh,myConnector);
}

Unfortunately this does not work so good because it only works when I
comment-out the first one - otherwise I get an Exception :
'OutOfMemoryError: bitmap size exceeds VM budget'. As you see I try to
release some memory but this does not help. This is a crucial problem,
since my application is working in a 'ring' of couple activities. So
when I finish the last one it goes back to the first one - it is
possible that the activity with animations will be called many times
in the life-time of the whole app. So I need to release the memory
from the second one as well.

So now here are my questions:
- why can't I start the first animation instantly after the activity
starts and how to do this?
- How to release the memory from the animations?

Can anyone please help?

PS: I am working on Android 1.5

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