How to make layout's and view's background transparent?

Question

I'm trying to make a layout with a background and add a scroll view at the bottom of this layout.

here's my code:

FrameLayout mainLayout = new FrameLayout(getApplicationContext());
mainLayout.setLayoutParams(new ViewGroup.LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
mainLayout.setBackgroundResource(R.drawable.background2);


FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(LayoutParams.FILL_PARENT, 200);
params.gravity = Gravity.BOTTOM|Gravity.CENTER;


final ScrollView scrollView = new ScrollView(getApplicationContext());
scrollView.setLayoutParams(params);
scrollView.setBackgroundColor(Color.TRANSPARENT);

StorageView storageView = new StorageView(getApplicationContext());
storageView.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

Drawable drawable = getResources().getDrawable(R.drawable.background1);
drawable.setAlpha(0);
storageView.setBackgroundDrawable(drawable);

scrollView.addView(storageView);

mainLayout.addView(scrollView);

setContentView(mainLayout);

why I see only the background image?

*Edit:

If I remove all the setBackgroundColor and move the setBackgroundDrawable to the ScrollLayout or the StorageView I see the background on the whole screen

*Edit2:

I edit the code: I remove the unnecessary layouts, and set a background drawable with alpha set to 0, and now it works.

well, I'll be happy if someone explain to me why I need to do this?

Why are you not writing the layout in the XML editor? Get it looking right in there first and then look at dynamically creating it if you need to. — Ricky, Nov 09 '11 at 15:54
beacuse StorageView is a customized View that I draw things in its onDraw method. so I cant see it on xml — piojo, Nov 09 '11 at 15:59
But does the layout above StorageView output correctly? What I mean is get it working before your StorageView. If you have already, then there is no need. :) — Ricky, Nov 09 '11 at 16:00
as I mentioned in the question if I set the background drawable to the storageView or the scrollLayout, I see it — piojo, Nov 09 '11 at 16:03

score 2 · Answer 1 · edited Jul 20 '15 at 06:38

2

Try this one:

findViewById(R.id.v).setBackgroundColor(getResources().getColor(android.R.color.transparent));

edited Jul 20 '15 at 06:38

duggu

37,851
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answered Jun 15 '12 at 09:39

user1384991

2,559
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score 2 · Answer 2 · edited Mar 24 '15 at 07:46

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <style name="Theme.Transparent" parent="android:Theme">
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowBackground">@android:color/transparent</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:windowIsFloating">true</item>
    <item name="android:backgroundDimEnabled">false</item>
  </style>
</resources>

and then in the manifest

<activity android:name=".SampleActivity" android:theme="@style/Theme.Transparent">
...
</activity>

@Lukap sir , How to make it for fragment?? – Md. Sajedul Karim Nov 08 '15 at 18:55 — Md. Sajedul Karim, Nov 08 '15 at 18:55

score 0 · Answer 3 · answered Dec 24 '14 at 12:32

0

Add the following attribute

android:background="@android:color/transparent"

answered Dec 24 '14 at 12:32

Otto Kanellis

3,629
1
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How to make layout's and view's background transparent?

3 Answers3