By default we have a grayish looking Button view for Android if you want to change the color you can do it either using XML attribute for <Button> tag or programmatically using java code, let's see both of them,
>Change Button color using XML attribute
All we need to do is add android:background attribute to the <Button> view xml tag, we can set colors as hex codes with opacity. We can also set image as background for a button using android:background:"@drawable/imageName attribute, lets see some examples,
Example 1
<Button
android:id="@+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_marginTop="38dp"
android:text="Button"
android:background="#FFFFCC" />
Example 2
<Button
android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:background="#88FFFFCC" />
Example 3
<Button
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button"
android:background="@drawable/image_name" />
Change Button color using xml attribute
button.setBackgroundResource(R.drawable.image_name);
button.setBackgroundResource(Color.RED);
button.setBackgroundResource(Color.rgb(100, 100, 100));
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