CODEWITHSUNDEEP
androidxamarinxamarin.androidout-of-memory
Xavier W.
Xavier W.

Reputation: 1360

Xamarin Android runtime exception

I have a Xamarin.Android application who contains a lot of button in her main game activity (25+).

When I press on a button, I randomly get a crash on my application. I have the following logs for the crash : 

Xamarin caused by: java.lang.OutOfMemoryError: Failed to allocate a 44236812 byte allocation with 8344256 free bytes and 7MB until OOM
    at dalvik.system.VMRuntime.newNonMovableArray(Native Method)
    at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
    at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:856)
    at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:675)
    at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:2228)
    at android.content.res.Resources.loadDrawableForCookie(Resources.java:4211)
    at android.content.res.Resources.loadDrawable(Resources.java:4085)
    at android.content.res.Resources.getDrawable(Resources.java:2005)
    at android.content.res.Resources.getDrawable(Resources.java:1987)
    at android.content.Context.getDrawable(Context.java:464)
    at android.view.View.setBackgroundResource(View.java:18532)
    at mono.android.view.View_OnClickListenerImplementor.n_onClick(Native Method)
    at mono.android.view.View_OnClickListenerImplementor.onClick(View_OnClickListenerImplementor.java:29)
    at android.view.View.performClick(View.java:5702)
    at android.widget.TextView.performClick(TextView.java:10888)
    at android.view.View$PerformClick.run(View.java:22541)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:158)
    at android.app.ActivityThread.main(ActivityThread.java:7229)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)

I do not know what really happends and how to fix it. An interested fact is that when I install the app, I did not face any issue the first time I use it. If I close the app and restart it, I get random crash on a button click event. The button action is to set a différent background image on a ImageView.

You can find a snapshot of my method who change the background : 

private void SetErrorImage(ImageView component, int errorNumber)
{
    switch (errorNumber)
    {
        case 0:
            component.SetBackgroundResource(Resource.Drawable.arbre_00);
            break;
        case 1:
            component.SetBackgroundResource(Resource.Drawable.arbre_01);
            break;
        case 2:
            component.SetBackgroundResource(Resource.Drawable.arbre_02);
            break;
        case 3:
            component.SetBackgroundResource(Resource.Drawable.arbre_03);
            break;
        case 4:
            component.SetBackgroundResource(Resource.Drawable.arbre_04);
            break;
        case 5:
            component.SetBackgroundResource(Resource.Drawable.arbre_05);
            break;
        case 6:
            component.SetBackgroundResource(Resource.Drawable.arbre_06);
            break;
        case 7:
            component.SetBackgroundResource(Resource.Drawable.arbre_07);
            break;
    }
}

Following this link, is it possible to use something like this Java method in Xamarin ? 

((BitmapDrawable)imageView.getDrawable()).getBitmap().recycle();

Upvotes: 1

Views: 776

Answers (2)

k3b
k3b

Reputation: 14755

Not the reason where your app looses the memory but a way to make OutOfMemoryError less likely.

I see that android wants to allocate "44236812" bytes (44 Megabytes) for an uncompressed image that may come from a 2048*1536 pixel 1.6MB jpg file.

Have you tried to reduce your resource images (less pixels or less bits per pixel)? Is your device capable to display this high resolution?

Upvotes: 2

Noires
Noires

Reputation: 643

As you kinda thought, you need to free the images properly. Even just changing the orientation several times, will just allocate more and more memory, if you dont free it properly.

Basically just 

imageView.SetImageDrawable(null)

should do the trick.

Upvotes: 0

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