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.

GSerg · Accepted Answer · 2011-06-08 23:25:55Z

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 8, 2011 at 23:25

GSerg

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answered Jun 8, 2011 at 6:43

Yogesh Tiwari

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Comments

Bertram Gilfoyle · Accepted Answer · 2017-04-26 18:39:44Z

6

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

edited Apr 26, 2017 at 18:39

Bertram Gilfoyle

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answered Feb 8, 2011 at 6:18

adnorid

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Comments

Tanmay Mandal · Accepted Answer · 2011-02-08 05:50:14Z

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 8, 2011 at 5:50

Tanmay Mandal

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Comments

Heiko Rupp · Accepted Answer · 2011-02-08 06:39:15Z

1

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.

answered Feb 8, 2011 at 6:39

Heiko Rupp

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Comments

Pang · Accepted Answer · 2021-02-06 09:11:34Z

1

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

This worked for me.

edited Feb 6, 2021 at 9:11

Pang

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answered Feb 6, 2021 at 8:43

Satheesh18

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