CODEWITHSUNDEEP
android
Device
Device

Reputation: 1011

Show loading bar until method completed

I have one method and one bitmap

private static Bitmap do(Bitmap bit){
 //Show loading until return;
return bit;
}

When i use the following code it takes about 30 seconds or more. What i want is to show a loading bar until the method completes

bitmap = do(bitmap);

How can i achieve that?

Example

What i do to resize a bitmap:

Bitmap bit;
bit = getResizedBitmap(bit,100,100);//takes 20 seconds
image.setImageBitmap(bit);
public Bitmap getResizedBitmap(Bitmap bm, int newWidth, int newHeight) {
            int width = bm.getWidth();
            int height = bm.getHeight();
            float scaleWidth = ((float) newWidth) / width;
            float scaleHeight = ((float) newHeight) / height;
            // CREATE A MATRIX FOR THE MANIPULATION
            Matrix matrix = new Matrix();
            // RESIZE THE BIT MAP
            matrix.postScale(scaleWidth, scaleHeight);

            // "RECREATE" THE NEW BITMAP
            Bitmap resizedBitmap = Bitmap.createBitmap(
                bm, 0, 0, width, height, matrix, false);
            return resizedBitmap;
        }

How can i get the same result using AsyncTask

Upvotes: 0

Views: 170

Answers (1)

iTurki
iTurki

Reputation: 16398

First: You should put the method in an AsyncTask.

Second: You display the progress bar before calling the method. Then, you hide it when the method finishes.

Example:

private class MyTask extends AsyncTask<Bitmap, Integer, Boolean> {
     protected Boolean doInBackground(Bitmap... bit) {
         //show progress bar
         //call your method
         return true;
     }

     protected void onProgressUpdate(Integer... progress) {
         setProgressPercent(progress[0]);
     }

     protected void onPostExecute(Boolean done) {
         //hide progress bar
     }
 }

And you run your AsyncTask like this:

Bitmap bit;
new MyTask().execute(bit);
//Now your Bitmap object is ready.

Upvotes: 1

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