android - "Bitmap size exceeds VM budget"虽然功能在Android中进行了优化

Question

我知道，您可以找到数百个关于这个特殊主题的问题，但我已经阅读了其中的大部分，但它们没有帮助。这是堆栈跟踪:

java.lang.OutOfMemoryError: bitmap size exceeds VM budget
at android.graphics.BitmapFactory.nativeDecodeStream(Native Method)
at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:573)
at PACKAGE.MyApp.getPhoto(MyApp.java:191)
at PACKAGE.MyApp.getEntries(MyApp.java:149)
at PACKAGE.AlarmSetup.createNotifications(AlarmSetup.java:48)
at PACKAGE.AlarmSetup.onHandleIntent(AlarmSetup.java:30)
at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:59)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:130)
at android.os.HandlerThread.run(HandlerThread.java:60)

虽然我在 Stack Overflow 上阅读了很多问题后优化了我的 Java 函数(至少我认为是这样)，但还是抛出了这个异常。这是我的代码:

public Bitmap getContactPhoto(String lookup_key) {
    Uri lookUpUri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_LOOKUP_URI, lookup_key);
    Uri contentUri = ContactsContract.Contacts.lookupContact(ctx.getContentResolver(), lookUpUri);
    try {
        final int REQUIRED_SIZE = 144;
        BitmapFactory.Options o = new BitmapFactory.Options();
        o.inJustDecodeBounds = true; // first get only the size of the image
        BitmapFactory.decodeStream(ContactsContract.Contacts.openContactPhotoInputStream(ctx.getContentResolver(), contentUri), null, o);
        int scale = 1;
        while ((o.outWidth/scale/2) >= REQUIRED_SIZE && (o.outHeight/scale/2) >= REQUIRED_SIZE) {
            scale *= 2;
        }
        BitmapFactory.Options oScaled = new BitmapFactory.Options();
        oScaled.inSampleSize = scale; // decode with calculated sample size now
        oScaled.inPurgeable = true; // prevent OutOfMemory
        oScaled.inInputShareable = true; // prevent OutOfMemory
        return BitmapFactory.decodeStream(ContactsContract.Contacts.openContactPhotoInputStream(ctx.getContentResolver(), contentUri), null, oScaled);
    }
    catch (Exception e) {
        return null;
    }
}

你能帮帮我吗？我变得绝望，尝试了很多改进。提前致谢!

Answer 1

问题可能不在这段代码中。也许您创建了很多无法进行垃圾回收的位图实例。尝试使用 MAT(Memory Analysis for Android Applications)检查是否存在此类实例。