set background drawable programmatically android

set background drawable programmatically android

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main_layout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#d3d3d3"
    tools:context=".MainActivity">

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/layout"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_margin="20dp"
        android:orientation="vertical"
        tools:context=".MainActivity">

    </RelativeLayout>
</RelativeLayout>

MainActivity.java

package com.android.kotlin.changedrawablecolor;

import android.content.Context;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.content.res.AppCompatResources;
import android.widget.RelativeLayout;


public class MainActivity extends AppCompatActivity {

    Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        context = this;

       RelativeLayout layout =(RelativeLayout)findViewById(R.id.layout);

//You can use the AppCompatResources.getDrawable() method and set background programmatically of layout using android VectorDrawable or image
        //AppCompatResources worked with both images and vectors for almost all android APIs

       final int sdk = android.os.Build.VERSION.SDK_INT;
        if (sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
            layout.setBackgroundDrawable(AppCompatResources.getDrawable(context, R.drawable.ic_png_image));
        } else {
            layout.setBackground(AppCompatResources.getDrawable(context, R.drawable.ic_png_image));
        }
    }
}