我遇到此问题,我在通知中使用的URL生成Bitmap
。但是,在我的手机上,Bitmap
显示为小白方块。我调查了一下,发现很多帖子都是这样谈论的:Icon not displaying in notification: white square shown instead
我确信我的Small Icon
通知确实是透明的。但是,对于Large Icon
,我发现Large Icon
不能透明,因为它实际上是我从网址生成的Bitmap
。我如何解决这个问题并确保图像正确呈现而不是让Large Icon
显示为白色方块?这是我的尝试:
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);
AndroidUtils.java:
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;
}
图片显示我的问题:
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 {
}
}
答案 0 :(得分:3)
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。
答案 1 :(得分:2)
您可以为不同版本使用不同的图标:
<div class="module bordered specialist">
<ul>
<li>Cardiac Care</li>
<li>Transplantation</li>
<li>Cancer Care (Oncology)</li>
<li>Diagnostic Radiology</li>
<li>Neurosciences</li>
<li>Mental Health Services</li>
</ul>
</div>
答案 2 :(得分:1)
我认为您一直在从网址下载图片吗?因此,请放置一个Asynctask从网址下载图像,然后使用通知构建器显示通知,如下所示:https://stackoverflow.com/a/24866080/6452886
答案 3 :(得分:1)
Lilipop存在这个问题,你只需看看Lolipop之前没有问题的其他手机。
请参阅以下链接
https://material.google.com/style/icons.html
https://developer.android.com/about/versions/android-5.0-changes.html
否则您可以更改已编译的SDK
答案 4 :(得分:1)
Lollipop及后来的Android API级别的通知发生了变化。要覆盖此问题,您可以按照以下方式:
Way1:在app模块的build.gradle中将targetSdkVersion从23更改为19。 这将解决问题。
注意:也许这个解决方案会在你的构建系统中产生问题(我更喜欢你不应该这样做,但你可以用这种方式检查你的问题)
Way2:使用黑白图标更改通知图标。因为通知构建器不支持棒棒糖API级别的颜色图标。
在Android Studio中获取黑白图标的方法:
这是正常的,因为Lollipop SDK(API 21 - Ver 5.0.1)只允许这种颜色方案
或者您可以从此处生成:http://romannurik.github.io/AndroidAssetStudio/icons-notification.html
答案 5 :(得分:1)
我认为问题在于图像大小,状态栏图标大小如下 -
ldpi - 18 x 18 px
mdpi - 24 x 24 px
hdpi - 36 x 36 px
xhdpi - 48 x 48 px
您还可以查看this developer doc
您需要将接收到的位图的尺寸更改为上述尺寸,它应该可以正常工作。
答案 6 :(得分:1)
好吧,因为谷歌已经改变了API 21+的通知风格,并建议使用white notification icon
虽然你可以在所有其他设备上使用21+及更旧图标上的剪影图标,如下所示
private int getNotificationIcon() {
boolean icon = (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP);
return icon ? R.drawable.silhouette : R.drawable.ic_launcher;
}
以下是实际的通知构建器代码:
Notification builder = new Notification.Builder(context)
.setSmallIcon(getNotificationIcon())
.build();
答案 7 :(得分:1)
参数
argb -The accent color to use
您传入2,这不是有效的ARGB颜色,因此您的小图标的背景颜色无法正确显示。而是选择有效的ARGB颜色。
如果您有想要使用的颜色资源,可以使用
等代码.setColor(context.getResources().getColor(R.color.notification_color))
此外,请注意Android 5.0更改状态:
更新或删除涉及颜色的资产。系统会忽略操作图标和主通知图标中的所有非Alpha通道。您应该假设这些图标仅为alpha。系统以白色绘制通知图标,以深灰色绘制动作图标。
您的小图标应该是完全白色和透明的 - 您可以使用Notification Icon Generator等工具生成相应的图标。
或者你可以试试这个:
int icon = Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? R.drawable.your_logo_for_Kitkat : R.mipmap.your_logo_for_Lolipop_and_uper_version;
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(icon)
.setContentTitle(remoteMessage.getData().get("title"))
.setContentText(remoteMessage.getData().get("shortDescription"))
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setColor(Color.RED)
.setStyle(notiStyle)
.setContentIntent(pendingIntent);
对于Url图片加载:
private class sendNotification extends AsyncTask<String, Void, Bitmap> {
Context ctx;
String message;
public sendNotification(Context context) {
super();
this.ctx = context;
}
@Override
protected Bitmap doInBackground(String... params) {
InputStream in;
message = params[0] + params[1];
try {
URL url = new URL(params[2]);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
in = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(in);
return myBitmap;
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
@Override
protected void onPostExecute(Bitmap result) {
super.onPostExecute(result);
try {
NotificationManager notificationManager = (NotificationManager) ctx
.getSystemService(Context.NOTIFICATION_SERVICE);
Intent intent = new Intent(ctx, NotificationsActivity.class);
intent.putExtra("isFromBadge", false);
Notification notification = new Notification.Builder(ctx)
.setContentTitle(
ctx.getResources().getString(R.string.app_name))
.setContentText(message)
.setSmallIcon(R.drawable.ic_launcher)
.setLargeIcon(result).build();
// hide the notification after its selected
notification.flags |= Notification.FLAG_AUTO_CANCEL;
notificationManager.notify(1, notification);
} catch (Exception e) {
e.printStackTrace();
}
}
}