Question

I am need a logic to change the xml background programatically instead of giving the backgroung color from xml file. here i used setContentView(R.layout.main); to show the xml file in application. But i need to change the background color of main.xml file in java code.

Answer 1

Following is the example that shows how can you make it. Here i have taken LinearLayout as the root node of xml file. In java code i have shown that how to set white background. I think this code will help you.

xml file

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/root"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
-----
-----
</LinearLayout>

java code

LinearLayout root=(LinearLayout)findViewById(R.id.root);
root.setBackgroundColor(Color.WHITE);

It can also possible to set color using Hex code as shown below,

root.setBackgroundColor(Color.parseColor("#ffffff"));

Even you can set drawable also,

root.setBackgroundResource(R.drawable.bg_image);