Background Image Placement

Question

I\'m trying to set my root LinearLayout element (which is set to fill_parent in both dimensions) to have a background image which is always located in the lower left corner

Answer 1

You'll have to create a custom bitmap drawable with your bitmap in an XML file (eg "res/drawables/my_drawable.xml"

<?xml version="1.0" encoding="utf-8"?>
<bitmap
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:src="@drawable/my_png_file"
    android:gravity="bottom|left" />

And then set this drawable xml as your view's background ("@drawables/my_drawable"). The drawable XML format is very poorly documented in the Android site, though, so it's definitely not an easy problem to figure out how to solve on your own.

Answer 2

If found an advantage doing this programatically: the image fits the layout instead of being bigger then it. No ideia why.

The code:

Bitmap bmp = BitmapFactory.decodeResource(getResources(),
                R.drawable.image);
BitmapDrawable bitmapDrawable = new BitmapDrawable(bmp);
bitmapDrawable.setGravity(Gravity.BOTTOM|Gravity.RIGHT);
LinearLayout layout = (LinearLayout) findViewById(R.id.background_root);
layout.setBackgroundDrawable(bitmapDrawable);

Answer 3

My answer is just an update of above answers If you are using XML for background, it may occur problem in aspect ratio

so use this code

Bitmap bmp = BitmapFactory.decodeResource(getResources(),
                R.drawable.image);
BitmapDrawable bitmapDrawable = new BitmapDrawable(bmp);
  bitmapDrawable.setGravity(Gravity.BOTTOM| Gravity.RIGHT| Gravity.FILL_HORIZONTAL);
LinearLayout layout = (LinearLayout) findViewById(R.id.background_root);
layout.setBackgroundDrawable(bitmapDrawable);

Gravity.Fill_HORIZONTAL will fit with width of layout on which you are applying background you can also mention this in XML file but as i said it will occur issue of Image Ratio

Answer 4

Wrap your LinearLayout into a RelativeLayout and add an ImageView to it. Using android:layout_alignParentBottom and android:layout_alignParentLeft you can put your image to the lower left.

<RelativeLayout
    android:id="@+id/relativeLayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:src="@drawable/my_image" />

    <LinearLayout
        android:id="@+id/linearLayout"
        ... >

Make sure ImageView is the first element of RelativeLayout to draw the image in background.