Utku Soytaş Utku Soytaş - 20 days ago 5
Android Question

How to solve java.lang.OutOfMemoryError trouble in Android

Altough I have very small size image in drawable folder, I am getting this error from users. And I am not using any bitmap function in code. At least intentionally :)

java.lang.OutOfMemoryError
at android.graphics.BitmapFactory.nativeDecodeAsset(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:683)
at android.graphics.BitmapFactory.decodeResourceStream(BitmapFactory.java:513)
at android.graphics.drawable.Drawable.createFromResourceStream(Drawable.java:889)
at android.content.res.Resources.loadDrawable(Resources.java:3436)
at android.content.res.Resources.getDrawable(Resources.java:1909)
at android.view.View.setBackgroundResource(View.java:16251)
at com.autkusoytas.bilbakalim.SoruEkrani.cevapSecimi(SoruEkrani.java:666)
at com.autkusoytas.bilbakalim.SoruEkrani$9$1.run(SoruEkrani.java:862)
at android.os.Handler.handleCallback(Handler.java:733)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:146)
at android.app.ActivityThread.main(ActivityThread.java:5602)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
at dalvik.system.NativeStart.main(Native Method)


According to this stackTrace I'm gettin this error at this line ('tv' is a textView):

tv.setBackgroundResource(R.drawable.yanlis);


What is the problem? If you need some other information about code, I can add it.
Thanks!

Answer

You can't increase the heap size dynamically but you can request to use more by using.

android:largeHeap="true"

in the manifest.xml,you can add in your manifest these lines it is working for some situations.

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:largeHeap="true"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

If still facing problem then this should also work

 BitmapFactory.Options options = new BitmapFactory.Options();
 options.inSampleSize = 8;
 mBitmapInsurance = BitmapFactory.decodeFile(mCurrentPhotoPath,options);

If set to a value > 1, requests the decoder to subsample the original image, returning a smaller image to save memory.

This is the optimal use of BitmapFactory.Options.inSampleSize with regards to speed of displaying the image. The documentation mentions using values that are a power of 2, so I am working with 2, 4, 8, 16 etc.


Also, you can use native memory (NDK & JNI), so you actually bypass the heap size limitation.

Here are some posts made about it:

and here's a library made for it:

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