问题
I know you can send info in the push notification parameters like message, title, image URL, etc. How does Facebook show your profile pic with your message in the notification area? I want to use an external image in the notification area, so when you pull it down you see the profile image with the message. Right now, mine just shows the default icon from the drawable folder. I figured this might be a common question but couldn\'t find anything. Any help would be nice.
回答1:
This statement will use a method to convert a URL (naturally, one that points to an image) into a Bitmap.
Bitmap bitmap = getBitmapFromURL("https://graph.facebook.com/YOUR_USER_ID/picture?type=large");
Note: Since you mention a Facebook profile, I have included an URL that gets your the large size profile picture of a Facebook User. You can however, change this to any URL that points to an image that you need to display in the Notification.
And the method that will get the image from the URL you specified in the statement above:
public Bitmap getBitmapFromURL(String strURL) {
try {
URL url = new URL(strURL);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.connect();
InputStream input = connection.getInputStream();
Bitmap myBitmap = BitmapFactory.decodeStream(input);
return myBitmap;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
Now pass the bitmap instance created above to the Notification.Builder instance. I call it builder in this example code. It is used in this line: builder.setLargeIcon(bitmap);. I am assuming you know how to display the actual Notification and it's configurations. So I will skip that part and add just the builder.
// CONSTRUCT THE NOTIFICATION DETAILS
builder.setAutoCancel(true);
builder.setSmallIcon(R.drawable.ic_launcher);
builder.setContentTitle("Some Title");
builder.setContentText("Some Content Text");
builder.setLargeIcon(bitmap);
builder.setContentIntent(pendingIntent);
Oh, almost forgot, if you haven't already done so, you will need this permission setup in the Manifest:
<uses-permission android:name="android.permission.INTERNET" />
回答2:
download image first using below code:
private Bitmap getBitmap(String url)
{
File f=fileCache.getFile(url);
//from SD cache
Bitmap b = decodeFile(f);
if(b!=null)
return b;
//from web
try {
Bitmap bitmap=null;
URL imageUrl = new URL(url);
HttpURLConnection conn = (HttpURLConnection)imageUrl.openConnection();
conn.setConnectTimeout(30000);
conn.setReadTimeout(30000);
conn.setInstanceFollowRedirects(true);
InputStream is=conn.getInputStream();
OutputStream os = new FileOutputStream(f);
Utils.CopyStream(is, os);
os.close();
bitmap = decodeFile(f);
return bitmap;
} catch (Exception ex){
ex.printStackTrace();
return null;
}
}
//decodes image and scales it to reduce memory consumption
private Bitmap decodeFile(File f){
try {
//decode image size
BitmapFactory.Options o = new BitmapFactory.Options();
o.inJustDecodeBounds = true;
BitmapFactory.decodeStream(new FileInputStream(f),null,o);
//Find the correct scale value. It should be the power of 2.
final int REQUIRED_SIZE=70;
int width_tmp=o.outWidth, height_tmp=o.outHeight;
int scale=1;
while(true){
if(width_tmp/2<REQUIRED_SIZE || height_tmp/2<REQUIRED_SIZE)
break;
width_tmp/=2;
height_tmp/=2;
scale*=2;
}
//decode with inSampleSize
BitmapFactory.Options o2 = new BitmapFactory.Options();
o2.inSampleSize=scale;
return BitmapFactory.decodeStream(new FileInputStream(f), null, o2);
} catch (FileNotFoundException e) {}
return null;
}
use that image as bitmap in below code:
Bitmap icon1 = downloadedBitmap;
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(
this).setAutoCancel(true)
.setContentTitle("DJ-Android notification")
.setSmallIcon(R.drawable.ic_launcher)
.setContentText("Hello World!");
NotificationCompat.BigPictureStyle bigPicStyle = new NotificationCompat.BigPictureStyle();
bigPicStyle.bigPicture(icon1);
bigPicStyle.setBigContentTitle("Dhaval Sodha Parmar");
mBuilder.setStyle(bigPicStyle);
// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(this, testActivity.class);
// The stack builder object will contain an artificial back stack
// for
// the
// started Activity.
// This ensures that navigating backward from the Activity leads out
// of
// your application to the Home screen.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(testActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent = stackBuilder.getPendingIntent(
0, PendingIntent.FLAG_UPDATE_CURRENT);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
mNotificationManager.notify(100, mBuilder.build());
i thing you k'no about android permission:
<uses-permission android:name="android.permission.INTERNET" />
for more detail check this artical and android developer
回答3:
I used Universal Image Loader to solve this. Take a look at the wiki on how to set it up. After you instantiate it once, this is the code I use in my GCM listener to download and display the image. I download the bitmap and then set it in the notification:
// Download profile picture of the user with Universal Image Loader
Bitmap bitmap = ImageLoader.getInstance().loadImageSync(profilePhotoUrl);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent,
PendingIntent.FLAG_ONE_SHOT);
Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
.setSmallIcon(R.drawable.ic_my_app)
.setLargeIcon(bitmap) // This is the image displayed on the lock screen
.setContentTitle("My App")
.setContentText(message)
.setAutoCancel(true)
.setSound(defaultSoundUri)
.setContentIntent(pendingIntent);
回答4:
Since image is loaded from internet, it should be done async in a background thread.You can use (1) async task or (2) Glide (for efficient image loading).
To load image notification, you need to use "NotificationCompat.BigPictureStyle()". This requires a bitmap (which has to be extracted from image url)
Most of the API's and methods of Glide are now deprecated. Below is working with Glide 4.9 and upto Android 10.
Step 1: Load bitmap from image url on background thread
private void getBitmapAsyncAndDoWork(String imageUrl) {
final Bitmap[] bitmap = {null};
Glide.with(getApplicationContext())
.asBitmap()
.load(imageUrl)
.into(new CustomTarget<Bitmap>() {
@Override
public void onResourceReady(@NonNull Bitmap resource, @Nullable Transition<? super Bitmap> transition) {
bitmap[0] = resource;
// TODO Do some work: Load image notification from here
displayImageNotification(bitmap[0]);
}
@Override
public void onLoadCleared(@Nullable Drawable placeholder) {
}
});
}
Step 2: Display the image notification once, the bitmap is ready.
private void displayImageNotification(Bitmap bitmap) {
NotificationCompat.Builder builder = new NotificationCompat.Builder(getApplicationContext(), getChannelId());
builder
.setContentTitle(title)
.setContentText(subtext)
.setDefaults(Notification.DEFAULT_LIGHTS | Notification.DEFAULT_VIBRATE)
.setSmallIcon(SMALL_ICON)
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setColor(getApplicationContext().getColor(color))
.setAutoCancel(true)
.setOngoing(false)
.setOnlyAlertOnce(true)
.setContentIntent(pendingIntent)
.setStyle(
new NotificationCompat.BigPictureStyle().bigPicture(bitmap))
.setPriority(Notification.PRIORITY_HIGH);
getManager().notify(tag, id, builder.build());
}
回答5:
Notification notif = new Notification.Builder(context)
.setContentTitle("Title")
.setContentText("content")
.setSmallIcon(R.drawable.ic_small)
.setLargeIcon(bitmap)
.setStyle(new Notification.BigPictureStyle()
.bigPicture(bigBitmap)
.setBigContentTitle("big title"))
.build();
来源：https://stackoverflow.com/questions/16007401/android-use-external-profile-image-in-notification-bar-like-facebook