How to display Bitmap Image in Android

Question

I am making an application in which i am getting an Mjpg Images from Live IP Camera in Android.

The problem is that since when i get the Image in the form of ByteArray. How can I display the Image?

I'm using the following code to display the image:

ImageView imageView = (ImageView) findViewById(R.id.imageView1);
Bitmap bmp = BitmapFactory.decodeByteArray(buffer, start, a);
imageView.setImageBitmap(bmp);

but i m getiing an exception

android.view.ViewRoot CallFromWrongThreadException

Please explain how to display the bytearray on android layout.

score 14 · Answer 1 · edited Jun 08 '11 at 23:25

14

ImageView tv1;
tv1= (ImageView) findViewById(R.id.image);
InputStream si1 = asset.open("image/" + cat_arr1[i] + ".png");
Bitmap bitmap1 = BitmapFactory.decodeStream(si1);
tv1.setImageBitmap(bitmap1);

edited Jun 08 '11 at 23:25

GSerg

76,472
17
159
346

answered Jun 08 '11 at 06:43

Yogesh Tiwari

149
1
4

score 6 · Accepted Answer · edited Apr 26 '17 at 18:39

6

You should use runOnUiThread() to update views from other threads.

edited Apr 26 '17 at 18:39

Bertram Gilfoyle

9,899
6
42
67

answered Feb 08 '11 at 06:18

adnorid

106
1

score 1 · Answer 3 · answered Feb 08 '11 at 05:50

1

When you are doing some view related job always do it from GUI thread ie. the thread that created the view hierarchy .

So use Handlers to achieve this.

answered Feb 08 '11 at 05:50

Tanmay Mandal

39,873
12
51
48

score 1 · Answer 4 · answered Feb 08 '11 at 06:39

The exception CallFromWrongThreadException means that you tried to update the UI from a thread that is not the UI thread and which is not allowed.

So your issue is not that your code to create the image is wrong, but that you are doing it at the wrong place. If you e.g. are fetching the image in background in an AsyncTask, you need to setImageBitMap() in postExecute() and not in doInBackground().

Without seeing more code, we can't help you more.

score 1 · Answer 5 · edited Feb 06 '21 at 09:11

1

View mImg = findViewById(R.id.image_from_gallery);
((ImageView) mImg).setImageBitmap(bitmap);

This worked for me.

edited Feb 06 '21 at 09:11

Pang

9,564
146
81
122

answered Feb 06 '21 at 08:43

Satheesh18

11
1

How to display Bitmap Image in Android

5 Answers5