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POAdding images to LinearLayout in code in Android
 

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  1. POAdding images to LinearLayout in code in Android
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    <p>I have a list of images that I need to show on the page one after another and all that bellow some text. I have LinearLayout in xml of the file where I added the part related to that text (some TextViews). As I need to call service to get image urls I add images to that LinearLayout in code. I use this code to get image using its url and to add it to the layout (in the onPostExecute part of the AsyncTask implementation).</p> <pre><code>/** * Download image using image url and show it in ImageView */ private class DownloadImageTask extends AsyncTask&lt;Void, Void, Bitmap&gt; { public DownloadImageTask() { super(); } protected Bitmap doInBackground(Void... arg0) { String urlDisplay = mDocumentUrls.get(mDocumentIdx); mDocumentIdx = mDocumentIdx + 1; Bitmap bmp = null; try { InputStream in = new java.net.URL(urlDisplay).openStream(); bmp = BitmapFactory.decodeStream(in); } catch (Exception e) { e.printStackTrace(); } return bmp; } protected void onPostExecute(Bitmap result) { // We add a new ImageView to the LinearLayout of the page and set it // source to the downloaded image ImageView newImageView = new ImageView(getActivity()); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams( RelativeLayout.LayoutParams.WRAP_CONTENT, RelativeLayout.LayoutParams.WRAP_CONTENT); params.setMargins(convertDpToPx(20), convertDpToPx(5), convertDpToPx(20), 0); newImageView.setImageBitmap(result); mDocumentDetailsLayout.addView(newImageView, params); //Next image if(mDocumentIdx &lt; mDocumentUrls.size()) new DownloadImageTask().execute(); } } </code></pre> <p>And this is the xml of the page (the part related to LinearLayout)</p> <pre><code>&lt;ScrollView android:id="@+id/details_form" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/splashScreenGray android:visibility="gone" &gt; &lt;LinearLayout android:id="@+id/details_form_content" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/splashScreenGray" android:clickable="false" android:orientation="vertical" ... </code></pre> <p>Images are shown on the page, but I have two problems: 1. I can't center them horizontally (prtsc1.png) 2. When my phone is in portrait mode I have this margins (top margin on the first image and margins between images) that I don't have when my phone is in portrait mode (I don't need them) - compare prtsc1.png and prtsc2.png.</p> <p><img src="https://i.stack.imgur.com/KTrye.png" alt="prtsc1.png"></p> <p><img src="https://i.stack.imgur.com/7GQV8.png" alt="enter image description here"></p> <p>I tried everything, but I am not sure what I am doing wrong.</p>
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      1. POAdding images to LinearLayout in code in Android
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    1. CODid you try to add `android:layout_gravity="top|center_horizontal"` to your `LinearLayout` ?
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    2. CODidn't help. Thanks for the answer.
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    3. COI solved the first problem. I added empty RelativeLayout to the existing LinearLayout and I added my images to that RelativeLayout, but I can't figure out these margins in portrait view.
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