大图标位图在通知中显示为白色正方形？

Question

我在通知中使用的URL生成位图时遇到了这个问题。然而，在我的手机上，位图就像一个白色的小方块一样显示出来。我查了一下，发现很多帖子都是这样说的：通知中没有显示图标：显示的是白色方块

而且我确信通知的小图标确实是透明的。但是，对于大图标，我意识到大图标不可能是透明的，因为它实际上是我从URL生成的位图。我怎样才能绕过这个问题，并确保图像呈现正确，而不是大图标显示为白色正方形？以下是我的尝试：

notificationService.java：

    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(context)
            .setContentTitle(getString(R.string.app_name))
            .setContentText(remoteMessage.getNotification().getBody())
            .setTicker(remoteMessage.getFrom() + " has responded!")
            .setLargeIcon(AndroidUtils.getBitmapFromURL(remoteMessage.getNotification().getIcon()))
            .setAutoCancel(true)
            .setSound(RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION))
            .setStyle(new NotificationCompat.BigTextStyle().bigText(remoteMessage.getNotification().getBody()))
            .setSmallIcon(R.drawable.ic_tabs_notification_transparent);

public static Bitmap getBitmapFromURL(String userId) {
        try {
            URL imgUrl = new URL("https://graph.facebook.com/" + userId + "/picture?type=large");
            InputStream in = (InputStream) imgUrl.getContent();
            Bitmap  bitmap = BitmapFactory.decodeStream(in);
            Bitmap output;
            Rect srcRect;
            if (bitmap.getWidth() > bitmap.getHeight()) {
                output = Bitmap.createBitmap(bitmap.getHeight(), bitmap.getHeight(), Bitmap.Config.ARGB_8888);
                srcRect = new Rect((bitmap.getWidth()-bitmap.getHeight())/2, 0, bitmap.getWidth()+(bitmap.getWidth()-bitmap.getHeight())/2, bitmap.getHeight());
            } else {
                output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getWidth(), Bitmap.Config.ARGB_8888);
                srcRect = new Rect(0, (bitmap.getHeight()-bitmap.getWidth())/2, bitmap.getWidth(), bitmap.getHeight()+(bitmap.getHeight()-bitmap.getWidth())/2);
            }

            Canvas canvas = new Canvas(output);

            final int color = 0xff424242;
            final Paint paint = new Paint();
            final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());

            float r;

            if (bitmap.getWidth() > bitmap.getHeight()) {
                r = bitmap.getHeight() / 2;
            } else {
                r = bitmap.getWidth() / 2;
            }

            paint.setAntiAlias(true);
            canvas.drawARGB(0, 0, 0, 0);
            paint.setColor(color);
            canvas.drawCircle(r, r, r, paint);
            paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
            canvas.drawBitmap(bitmap, srcRect, rect, paint);
            return output;
        } catch (IOException e) {
            FirebaseCrash.report(e);
            return null;
        }

显示我的问题的图像：

编辑：build.gradle文件显示：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_7
        targetCompatibility JavaVersion.VERSION_1_7
    }
    defaultConfig {
        applicationId '<ID>'
        multiDexEnabled true
        minSdkVersion 21
        targetSdkVersion 23
        versionCode 12
        versionName ".12"
        signingConfig signingConfigs.Tabs
    }
    buildTypes {
        release {
            minifyEnabled false
            shrinkResources false
            zipAlignEnabled true
            debuggable false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
            signingConfig signingConfigs.Tabs
        }
        debug {
            applicationIdSuffix ".debug"
            debuggable true
            minifyEnabled false
            signingConfig signingConfigs.Tabs
        }
    }
    //DatabaseReference stuff
    packagingOptions {
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE-FIREBASE.txt'
        exclude 'META-INF/NOTICE'
    }
    dexOptions {
        javaMaxHeapSize "4g"
    }
    productFlavors {
    }
}

Answer 1

try {
            NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
            mBuilder.setSmallIcon(getNotificationIcon());
            Bitmap icon = BitmapFactory.decodeResource(CXGcmListenerService.this.getResources(), R.drawable.ic_launcher);
            mBuilder.setLargeIcon(icon);
            //Define sound URI
            Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
            mBuilder.setContentIntent(pendingIntent);
            mBuilder.setContentText(msg);
            mBuilder.setStyle(new NotificationCompat.BigTextStyle()
                    .bigText(msg));
            mBuilder.setContentTitle(getString(R.string.app_name));
            mBuilder.getNotification().flags |= Notification.FLAG_AUTO_CANCEL;
            mBuilder.setAutoCancel(true);
            mBuilder.setSound(soundUri); //This sets the sound to play
            Intent intent = new Intent(CXGcmListenerService.this, CXMainActivity.class);
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
            PendingIntent notificationIntent = PendingIntent.getActivity(this, 0, intent, 0);
            mBuilder.setContentIntent(notificationIntent);

            NotificationManager notifyManager = (NotificationManager) CXGcmListenerService.this.getSystemService(Context.NOTIFICATION_SERVICE);
            NOTIFICATION_ID++;
            notifyManager.notify("" + System.currentTimeMillis(), NOTIFICATION_ID, mBuilder.build());
        } catch (Resources.NotFoundException e) {
            CXLog.e(TAG, "" + e.getLocalizedMessage(), e);
        }

请尝试此操作以获取通知中的图标。